S-1312 Series
www.sii-ic.com
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION
LOW DROPOUT CMOS VOLTAGE REGULATOR
© Seiko Instruments Inc., 2011-2013 Rev.2.2_00
Seiko Instruments Inc. 1
The S-1312 Series, developed by using the CMOS technology, is a positive voltage regulator IC which has low current
consumption, high ripple-rejection and low dropout voltage.
Even with low current consumption of 20 μA typ., it has high ripple-rejection of 75 dB typ., and a ceramic capacitor of 0.22 μF
or more can be used as the input and output capacitors.
It also has high-accuracy output voltage of ±1.0%.
Features
• Output voltage: 1.0 V to 3.5 V, selectable in 0.05 V step
• Input voltage: 1.5 V to 5.5 V
• Output voltage accuracy: ±1.0% (1.0 V to 1.45 V output product: ±15 mV)
• Dropout voltage: 160 mV typ. (2.8 V output product, IOUT = 100 mA)
• Current consumption: During operation: 20 μA typ., 30 μA max.
During power-off: 0.1 μA typ., 1.0 μA max.
• Output current: Possible to output 150 mA (VIN ≥ VOUT(S) + 1.0 V)*1
• Input and output capacitors: A ceramic capacitor of 0.22 μF or more can be used.
• Ripple rejection: 75 dB typ. (1.2 V output product, f = 1.0 kHz)
70 dB typ. (2.85 V output product, f = 1.0 kHz)
• Built-in overcurrent protection circuit: Limits overcurrent of output transistor.
• Built-in thermal shutdown circuit: Prevents damage caused by heat.
• Built-in ON / OFF circuit: Ensures long battery life.
• Pull-down resistor is selectable.
• Discharge shunt function is selectable.
• Operation temperature range: Ta = −40°C to +85°C
• Lead-free (Sn 100%), halogen-free
*1. Attention should be paid to the power dissipation of the package when the out put current is large.
Applications
• Constant-voltage power supply for portable communication device, digital camera, and digital audio player
• Constant-voltage power supply for battery-powered device
• Constant-voltage power supply for home electric appliance
Packages
• SOT-23-5
• HSNT-4 (1010)
• HSNT-4 (0808)
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
2
Block Diagrams
1. S-1312 Series A type
Function Status
ON / OFF logic Active "H"
Discharge shunt
function Available
Pull-down resistor Available
VSS
ON / OFF
VIN VOUT
*1
*1
ON / OFF circuit
Reference
voltage circuit
+
−
Overcurrent
protection circuit
Thermal shutdown circuit
*1. Parasitic diode
Figure 1
2. S-1312 Series B type
Function Status
ON / OFF logic Active "H"
Discharge shunt
function Available
Pull-down resistor Unavailable
VSS
ON / OFF
VIN VOUT
*1
*1
ON / OFF circuit
Reference
voltage circuit
+
−
Overcurrent
protection circuit
Thermal shutdown circuit
*1. Parasitic diode
Figure 2
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 3
3. S-1312 Series C type
Function Status
ON / OFF logic Active "H"
Discharge shunt
function Unavailable
Pull-down resistor Available
VSS
ON / OFF
VIN VOUT
*1
ON / OFF circuit
Reference
voltage circuit
+
−
Overcurrent
protection circuit
Thermal shutdown circuit
*1. Parasitic diode
Figure 3
4. S-1312 Series D type
Function Status
ON / OFF logic Active "H"
Discharge shunt
function Unavailable
Pull-down resistor Unavailable
VSS
ON / OFF
VIN VOUT
*1
ON / OFF circuit
Reference
voltage circuit
+
−
Overcurrent
protection circuit
Thermal shutdown circuit
*1. Parasitic diode
Figure 4
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
4
Product Name Structure
Users can select the product type, output voltage, and package type for the S-1312 Series. Refer to "1. Product
name" regarding the contents of product name, "2. Function list of product types" regarding the product type,
"3. Packages" regarding the package drawings, "4. Product name lists" regarding details of the product name.
1. Product name
S-1312 x xx - xxxx U 3
Product type*3
A to D
Package abbreviation and IC packing specifications*1
M5T1: SOT-23-5, Tape
A4T2: HSNT-4 (1010), Tape
A4T1: HSNT-4 (0808), Tape
Output voltage*2
10 to 35
(e.g., when the output voltage is 1.0 V, it is expressed as 10.)
Environmental code
U: Lead-free (Sn 100%), halogen-free
*1. Refer to the tape drawing.
*2. If you request the product which has 0.05 V step, contact our sales office.
*3. Refer to "2. Function list of product types".
2. Function list of product types
Table 1
Product Type ON / OFF Logic Discharge Shunt Function Pull-down Resistor
A Active "H" Available Available
B Active "H" Available Unavailable
C Active "H" Unavailable Available
D Active "H" Unavailable Unavailable
3. Packages
Table 2 Package Drawing Codes
Package Name Dimension Tape Reel Land
SOT-23-5 MP005-A-P-SD MP005-A-C-SD MP005-A-R-SD −
HSNT-4 (1010) PL004-A-P-SD PL004-A-C-SD PL004-A-R-SD PL004-A-L-SD
HSNT-4 (0808) PK004-A-P-SD PK004-A-C-SD PK004-A-R-SD PK004-A-L-SD
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 5
4. Product name lists
4. 1 S-1312 Series A typ e
ON / OFF logic: Active "H"
Discharge shunt function: Available Pull-down resistor: Available
Table 3
Output Voltage SOT - 23-5 HSNT-4 (1010) HSNT-4 (0808)
1.0 V ± 15 mV S-1312A10-M5T1U3 S-1312A10-A4T2U3 S-1312A10-A4T1U3
1.1 V ± 15 mV S-1312A11-M5T1U3 S-1312A11-A4T2U3 S-1312A11-A4T1U3
1.2 V ± 15 mV S-1312A12-M5T1U3 S-1312A12-A4T2U3 S-1312A12-A4T1U3
1.25 V ± 15 mV S-1312A1C-M5T1U3 S-1312A1C-A4T2U3 S-1312A1C-A4T1U3
1.3 V ± 15 mV S-1312A13-M5T1U3 S-1312A13-A4T2U3 S-1312A13-A4T1U3
1.4 V ± 15 mV S-1312A14-M5T1U3 S-1312A14-A4T2U3 S-1312A14-A4T1U3
1.5 V ± 1.0% S-1312A15-M5T1U3 S-1312A15-A4T2U3 S-1312A15-A4T1U3
1.6 V ± 1.0% S-1312A16-M5T1U3 S-1312A16-A4T2U3 S-1312A16-A4T1U3
1.7 V ± 1.0% S-1312A17-M5T1U3 S-1312A17-A4T2U3 S-1312A17-A4T1U3
1.8 V ± 1.0% S-1312A18-M5T1U3 S-1312A18-A4T2U3 S-1312A18-A4T1U3
1.85 V ± 1.0% S-1312A1J-M5T1U3 S-1312A1J-A4T2U3 S-1312A1J-A4T1U3
1.9 V ± 1.0% S-1312A19-M5T1U3 S-1312A19-A4T2U3 S-1312A19-A4T1U3
2.0 V ± 1.0% S-1312A20-M5T1U3 S-1312A20-A4T2U3 S-1312A20-A4T1U3
2.1 V ± 1.0% S-1312A21-M5T1U3 S-1312A21-A4T2U3 S-1312A21-A4T1U3
2.2 V ± 1.0% S-1312A22-M5T1U3 S-1312A22-A4T2U3 S-1312A22-A4T1U3
2.3 V ± 1.0% S-1312A23-M5T1U3 S-1312A23-A4T2U3 S-1312A23-A4T1U3
2.4 V ± 1.0% S-1312A24-M5T1U3 S-1312A24-A4T2U3 S-1312A24-A4T1U3
2.5 V ± 1.0% S-1312A25-M5T1U3 S-1312A25-A4T2U3 S-1312A25-A4T1U3
2.6 V ± 1.0% S-1312A26-M5T1U3 S-1312A26-A4T2U3 S-1312A26-A4T1U3
2.7 V ± 1.0% S-1312A27-M5T1U3 S-1312A27-A4T2U3 S-1312A27-A4T1U3
2.8 V ± 1.0% S-1312A28-M5T1U3 S-1312A28-A4T2U3 S-1312A28-A4T1U3
2.85 V ± 1.0% S-1312A2J-M5T1U3 S-1312A2J-A4T2U3 S-1312A2J-A4T1U3
2.9 V ± 1.0% S-1312A29-M5T1U3 S-1312A29-A4T2U3 S-1312A29-A4T1U3
3.0 V ± 1.0% S-1312A30-M5T1U3 S-1312A30-A4T2U3 S-1312A30-A4T1U3
3.1 V ± 1.0% S-1312A31-M5T1U3 S-1312A31-A4T2U3 S-1312A31-A4T1U3
3.2 V ± 1.0% S-1312A32-M5T1U3 S-1312A32-A4T2U3 S-1312A32-A4T1U3
3.3 V ± 1.0% S-1312A33-M5T1U3 S-1312A33-A4T2U3 S-1312A33-A4T1U3
3.4 V ± 1.0% S-1312A34-M5T1U3 S-1312A34-A4T2U3 S-1312A34-A4T1U3
3.5 V ± 1.0% S-1312A35-M5T1U3 S-1312A35-A4T2U3 S-1312A35-A4T1U3
Remark Please contact our sales office for products with specifications other than t he above.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
6
4. 2 S-1312 Series B type
ON / OFF logic: Active "H"
Discharge shunt function: Available Pull-down resistor: Unavailable
Table 4
Output Voltage SOT - 23-5 HSNT-4 (1010) HSNT-4 (0808)
1.0 V ± 15 mV S-1312B10-M5T1U3 S-1312B10-A4T2U3 S-1312B10-A4T1U3
1.1 V ± 15 mV S-1312B11-M5T1U3 S-1312B11-A4T2U3 S-1312B11-A4T1U3
1.2 V ± 15 mV S-1312B12-M5T1U3 S-1312B12-A4T2U3 S-1312B12-A4T1U3
1.3 V ± 15 mV S-1312B13-M5T1U3 S-1312B13-A4T2U3 S-1312B13-A4T1U3
1.4 V ± 15 mV S-1312B14-M5T1U3 S-1312B14-A4T2U3 S-1312B14-A4T1U3
1.5 V ± 1.0% S-1312B15-M5T1U3 S-1312B15-A4T2U3 S-1312B15-A4T1U3
1.6 V ± 1.0% S-1312B16-M5T1U3 S-1312B16-A4T2U3 S-1312B16-A4T1U3
1.7 V ± 1.0% S-1312B17-M5T1U3 S-1312B17-A4T2U3 S-1312B17-A4T1U3
1.8 V ± 1.0% S-1312B18-M5T1U3 S-1312B18-A4T2U3 S-1312B18-A4T1U3
1.85 V ± 1.0% S-1312B1J-M5T1U3 S-1312B1J-A4T2U3 S-1312B1J-A4T1U3
1.9 V ± 1.0% S-1312B19-M5T1U3 S-1312B19-A4T2U3 S-1312B19-A4T1U3
2.0 V ± 1.0% S-1312B20-M5T1U3 S-1312B20-A4T2U3 S-1312B20-A4T1U3
2.1 V ± 1.0% S-1312B21-M5T1U3 S-1312B21-A4T2U3 S-1312B21-A4T1U3
2.2 V ± 1.0% S-1312B22-M5T1U3 S-1312B22-A4T2U3 S-1312B22-A4T1U3
2.3 V ± 1.0% S-1312B23-M5T1U3 S-1312B23-A4T2U3 S-1312B23-A4T1U3
2.4 V ± 1.0% S-1312B24-M5T1U3 S-1312B24-A4T2U3 S-1312B24-A4T1U3
2.5 V ± 1.0% S-1312B25-M5T1U3 S-1312B25-A4T2U3 S-1312B25-A4T1U3
2.6 V ± 1.0% S-1312B26-M5T1U3 S-1312B26-A4T2U3 S-1312B26-A4T1U3
2.7 V ± 1.0% S-1312B27-M5T1U3 S-1312B27-A4T2U3 S-1312B27-A4T1U3
2.8 V ± 1.0% S-1312B28-M5T1U3 S-1312B28-A4T2U3 S-1312B28-A4T1U3
2.85 V ± 1.0% S-1312B2J-M5T1U3 S-1312B2J-A4T2U3 S-1312B2J-A4T1U3
2.9 V ± 1.0% S-1312B29-M5T1U3 S-1312B29-A4T2U3 S-1312B29-A4T1U3
3.0 V ± 1.0% S-1312B30-M5T1U3 S-1312B30-A4T2U3 S-1312B30-A4T1U3
3.1 V ± 1.0% S-1312B31-M5T1U3 S-1312B31-A4T2U3 S-1312B31-A4T1U3
3.2 V ± 1.0% S-1312B32-M5T1U3 S-1312B32-A4T2U3 S-1312B32-A4T1U3
3.3 V ± 1.0% S-1312B33-M5T1U3 S-1312B33-A4T2U3 S-1312B33-A4T1U3
3.4 V ± 1.0% S-1312B34-M5T1U3 S-1312B34-A4T2U3 S-1312B34-A4T1U3
3.5 V ± 1.0% S-1312B35-M5T1U3 S-1312B35-A4T2U3 S-1312B35-A4T1U3
Remark Please contact our sales office for products with specifications other than t he above.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 7
4. 3 S-1312 Series C type
ON / OFF logic: Active "H"
Discharge shunt function: Unavailable Pull-down resistor: Available
Table 5
Output Voltage SOT-23-5 HSNT-4 (1010) HSNT -4 (0808)
1.0 V ± 15 mV S-1312C10-M5T1U3 S-1312C10-A4T2U3 S-1312C10-A4T1U3
1.1 V ± 15 mV S-1312C11-M5T1U3 S-1312C11-A4T2U3 S-1312C11-A4T1U3
1.2 V ± 15 mV S-1312C12-M5T1U3 S-1312C12-A4T2U3 S-1312C12-A4T1U3
1.3 V ± 15 mV S-1312C13-M5T1U3 S-1312C13-A4T2U3 S-1312C13-A4T1U3
1.4 V ± 15 mV S-1312C14-M5T1U3 S-1312C14-A4T2U3 S-1312C14-A4T1U3
1.5 V ± 1.0% S-1312C15-M5T1U3 S-1312C15-A4T2U3 S-1312C15-A4T1U3
1.6 V ± 1.0% S-1312C16-M5T1U3 S-1312C16-A4T2U3 S-1312C16-A4T1U3
1.7 V ± 1.0% S-1312C17-M5T1U3 S-1312C17-A4T2U3 S-1312C17-A4T1U3
1.8 V ± 1.0% S-1312C18-M5T1U3 S-1312C18-A4T2U3 S-1312C18-A4T1U3
1.85 V ± 1.0% S-1312C1J-M5T1U3 S-1312C1J-A4T2U3 S-1312C1J-A4T1U3
1.9 V ± 1.0% S-1312C19-M5T1U3 S-1312C19-A4T2U3 S-1312C19-A4T1U3
2.0 V ± 1.0% S-1312C20-M5T1U3 S-1312C20-A4T2U3 S-1312C20-A4T1U3
2.1 V ± 1.0% S-1312C21-M5T1U3 S-1312C21-A4T2U3 S-1312C21-A4T1U3
2.2 V ± 1.0% S-1312C22-M5T1U3 S-1312C22-A4T2U3 S-1312C22-A4T1U3
2.3 V ± 1.0% S-1312C23-M5T1U3 S-1312C23-A4T2U3 S-1312C23-A4T1U3
2.4 V ± 1.0% S-1312C24-M5T1U3 S-1312C24-A4T2U3 S-1312C24-A4T1U3
2.5 V ± 1.0% S-1312C25-M5T1U3 S-1312C25-A4T2U3 S-1312C25-A4T1U3
2.6 V ± 1.0% S-1312C26-M5T1U3 S-1312C26-A4T2U3 S-1312C26-A4T1U3
2.7 V ± 1.0% S-1312C27-M5T1U3 S-1312C27-A4T2U3 S-1312C27-A4T1U3
2.8 V ± 1.0% S-1312C28-M5T1U3 S-1312C28-A4T2U3 S-1312C28-A4T1U3
2.85 V ± 1.0% S-1312C2J-M5T1U3 S-1312C2J-A4T2U3 S-1312C2J-A4T1U3
2.9 V ± 1.0% S-1312C29-M5T1U3 S-1312C29-A4T2U3 S-1312C29-A4T1U3
3.0 V ± 1.0% S-1312C30-M5T1U3 S-1312C30-A4T2U3 S-1312C30-A4T1U3
3.1 V ± 1.0% S-1312C31-M5T1U3 S-1312C31-A4T2U3 S-1312C31-A4T1U3
3.2 V ± 1.0% S-1312C32-M5T1U3 S-1312C32-A4T2U3 S-1312C32-A4T1U3
3.3 V ± 1.0% S-1312C33-M5T1U3 S-1312C33-A4T2U3 S-1312C33-A4T1U3
3.4 V ± 1.0% S-1312C34-M5T1U3 S-1312C34-A4T2U3 S-1312C34-A4T1U3
3.5 V ± 1.0% S-1312C35-M5T1U3 S-1312C35-A4T2U3 S-1312C35-A4T1U3
Remark Please contact our sales office for products with specifications other than t he above.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
8
4. 4 S-1312 Series D type
ON / OFF logic: Active "H"
Discharge shunt function: Unavailable Pull-down resistor: Unavailable
Table 6
Output Voltage SOT-23-5 HSNT-4 (1010) HSNT -4 (0808)
1.0 V ± 15 mV S-1312D10-M5T1U3 S-1312D10-A4T2U3 S-1312D10-A4T1U3
1.1 V ± 15 mV S-1312D11-M5T1U3 S-1312D11-A4T2U3 S-1312D11-A4T1U3
1.2 V ± 15 mV S-1312D12-M5T1U3 S-1312D12-A4T2U3 S-1312D12-A4T1U3
1.3 V ± 15 mV S-1312D13-M5T1U3 S-1312D13-A4T2U3 S-1312D13-A4T1U3
1.4 V ± 15 mV S-1312D14-M5T1U3 S-1312D14-A4T2U3 S-1312D14-A4T1U3
1.5 V ± 1.0% S-1312D15-M5T1U3 S-1312D15-A4T2U3 S-1312D15-A4T1U3
1.6 V ± 1.0% S-1312D16-M5T1U3 S-1312D16-A4T2U3 S-1312D16-A4T1U3
1.7 V ± 1.0% S-1312D17-M5T1U3 S-1312D17-A4T2U3 S-1312D17-A4T1U3
1.8 V ± 1.0% S-1312D18-M5T1U3 S-1312D18-A4T2U3 S-1312D18-A4T1U3
1.85 V ± 1.0% S-1312D1J-M5T1U3 S-1312D1J-A4T2U3 S-1312D1J-A4T1U3
1.9 V ± 1.0% S-1312D19-M5T1U3 S-1312D19-A4T2U3 S-1312D19-A4T1U3
2.0 V ± 1.0% S-1312D20-M5T1U3 S-1312D20-A4T2U3 S-1312D20-A4T1U3
2.1 V ± 1.0% S-1312D21-M5T1U3 S-1312D21-A4T2U3 S-1312D21-A4T1U3
2.2 V ± 1.0% S-1312D22-M5T1U3 S-1312D22-A4T2U3 S-1312D22-A4T1U3
2.3 V ± 1.0% S-1312D23-M5T1U3 S-1312D23-A4T2U3 S-1312D23-A4T1U3
2.4 V ± 1.0% S-1312D24-M5T1U3 S-1312D24-A4T2U3 S-1312D24-A4T1U3
2.5 V ± 1.0% S-1312D25-M5T1U3 S-1312D25-A4T2U3 S-1312D25-A4T1U3
2.6 V ± 1.0% S-1312D26-M5T1U3 S-1312D26-A4T2U3 S-1312D26-A4T1U3
2.7 V ± 1.0% S-1312D27-M5T1U3 S-1312D27-A4T2U3 S-1312D27-A4T1U3
2.8 V ± 1.0% S-1312D28-M5T1U3 S-1312D28-A4T2U3 S-1312D28-A4T1U3
2.85 V ± 1.0% S-1312D2J-M5T1U3 S-1312D2J-A4T2U3 S-1312D2J-A4T1U3
2.9 V ± 1.0% S-1312D29-M5T1U3 S-1312D29-A4T2U3 S-1312D29-A4T1U3
3.0 V ± 1.0% S-1312D30-M5T1U3 S-1312D30-A4T2U3 S-1312D30-A4T1U3
3.1 V ± 1.0% S-1312D31-M5T1U3 S-1312D31-A4T2U3 S-1312D31-A4T1U3
3.2 V ± 1.0% S-1312D32-M5T1U3 S-1312D32-A4T2U3 S-1312D32-A4T1U3
3.3 V ± 1.0% S-1312D33-M5T1U3 S-1312D33-A4T2U3 S-1312D33-A4T1U3
3.4 V ± 1.0% S-1312D34-M5T1U3 S-1312D34-A4T2U3 S-1312D34-A4T1U3
3.5 V ± 1.0% S-1312D35-M5T1U3 S-1312D35-A4T2U3 S-1312D35-A4T1U3
Remark Please contact our sales office for products with specifications other than t he above.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 9
Pin Configurations
1. SOT-23-5 Table 7
Pin No. Symbol Description
1 VIN Input voltage pin
2 VSS GND pin
3 ON / OFF ON / OFF pin
4 NC*1 No connection
5 VOUT Output voltage pin
132
45
Top view
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
Figure 5
2. HSNT-4 (1010) Table 8
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 ON / OFF ON / OFF pin
4 VIN Input voltage pin
Top view
14
23
Bottom view
41
32
*1
*1. Connect the heatsink of backside at
shadowed area to the board, and set
electric potential open or GND.
However, do not use it as the function
of electrode.
Figure 6
3. HSNT-4 (0808) Table 9
Pin No. Symbol Description
1 VOUT Output voltage pin
2 VSS GND pin
3 ON / OFF ON / OFF pin
4 VIN Input voltage pin
Top view
14
23
Bottom view
41
32
*1
*1. Connect the heatsink of backside at
shadowed area to the board, and set
electric potential open or GND.
However, do not use it as the f unction
of electrode.
Figure 7
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
10
Absolute Maximum Ratings
Table 10 (Ta = +25°C unless otherwise specified)
Item Symbol Absolute Maximum Rating Unit
VIN V
SS − 0.3 to VSS + 6.0 V
Input voltage VON / OFF V
SS − 0.3 to VSS + 6.0 V
Output voltage VOUT V
SS − 0.3 to VIN + 0.3 V
Output current IOUT 180 mA
SOT-23-5 600*1 mW
HSNT-4 (1010) 340*1 mW
Power dissipation HSNT-4 (0808) PD 335*1 mW
Operation ambient temperature Topr −40 to +85 °C
Storage temperature Tstg −40 to +125 °C
*1. When mounted on board
[Mounted board]
(1) Board size: 114.3 mm × 76.2 mm × t1.6 mm
(2) Name: JEDEC STANDARD51-7
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
0 50 100 150
0
Power Dissipation (PD) [mW]
Ambient Temperature (Ta) [°C]
400
200
600
1000
800
1200
SOT-23-5
HSNT-4
(0808)
HSNT-4
(1010)
Figure 8 Power Dissipation of Package (When Mounted on Board)
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 11
Power Dissipation of HSNT-4 (1010) and HSNT-4 (0808) (Reference)
Power dissipation of package differs depending on the mounting conditions.
Consider the power dissipation characteristics under the following conditions as reference.
[Mounted board]
(1) Board size: 40 mm × 40 mm × t0.8 mm
(2) Board material: Glass epoxy resin (four layers)
(3) Wiring ratio: 50%
(4) Test conditions: When mounted on board (wind speed: 0 m/s)
(5) Land pattern: Refer to the recommended land pattern
Drawing code: PL004-A-L-SD (HSNT-4 (1010)), PK004-A-L-SD (HSNT-4 (0808))
0 50 100 150
0
Power Dissipation (PD) [mW]
Ambient Temperature (Ta) [°C]
400
200
600
1000
800
1200 HSNT-4
(1010)
HSNT-4
(0808)
Figure 9 Power Dissipation of Package (When Mounted on Board)
Table 11
Condition Power Dissipation (Reference) Thermal Resistance Value (θj−a)
HSNT-4 (1010)
(When mounted on board) 870 mW 115°C/W
HSNT-4 (0808)
(When mounted on board) 850 mW 117°C/W
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
12
Electrical Characteristics
Table 12
(Ta = +25°C unless otherwise specified)
Item Symbol Condition Min. Typ. Max. Unit
Test
Circuit
1.0 V
≤
V
OUT(S)
< 1.5 V V
OUT(S)
−
0.015 V
OUT(S)
V
OUT(S)
+
0.015 V 1
Output voltage
*1
V
OUT(E)
V
IN
= V
OUT(S)
+
1.0 V,
I
OUT
= 30 mA 1.5 V
≤
V
OUT(S)
≤
3.5 V V
OUT(S)
×
0.99 V
OUT(S)
V
OUT(S)
×
1.01 V 1
Output current
*2
I
OUT
V
IN
≥
V
OUT(S)
+
1.0 V 150
*5
−
−
mA 3
1.0 V
≤
V
OUT(S)
< 1.1 V 0.50 0.68 0.86 V 1
1.1 V
≤
V
OUT(S)
< 1.2 V
−
0.52 0.71 V 1
1.2 V
≤
V
OUT(S)
< 1.3 V
−
0.31 0.63 V 1
1.3 V
≤
V
OUT(S)
< 1.4 V
−
0.28 0.56 V 1
1.4 V
≤
V
OUT(S)
< 1.5 V
−
0.26 0.50 V 1
1.5 V
≤
V
OUT(S)
< 1.7 V
−
0.24 0.47 V 1
1.7 V
≤
V
OUT(S)
< 2.0 V
−
0.22 0.43 V 1
2.0 V
≤
V
OUT(S)
< 2.5 V
−
0.18 0.36 V 1
2.5 V
≤
V
OUT(S)
< 3.0 V
−
0.16 0.32 V 1
3.0 V
≤
V
OUT(S)
< 3.3 V
−
0.15 0.28 V 1
Dropout voltage
*3
V
drop
I
OUT
= 100 mA
3.3 V
≤
V
OUT(S)
≤
3.5 V
−
0.14 0.27 V 1
1.0 V
≤
V
OUT(S)
< 1.1 V
1.6 V
≤
V
IN
≤
5.5V, I
OUT
= 30 mA
−
0.02 0.1 %/V 1
Line regulation
Δ
V
IN
•
V
OUT
Δ
V
OUT1
1.1 V
≤
V
OUT(S)
≤
3.5 V
V
OUT(S)
+
0.5 V
≤
V
IN
≤
5.5 V, I
OUT
= 30 mA
−
0.02 0.1 %/V 1
Load regulation
Δ
V
OUT2
V
IN
= V
OUT(S)
+
1.0 V, 100
μ
A
≤
I
OUT
≤
100 mA
−
20 40 mV 1
Output voltage
temperature coefficient
*4
Δ
Ta
•
V
OUT
Δ
V
OUT
V
IN
= V
OUT(S)
+
1.0 V, I
OUT
=
30 mA,
−
40
°
C
≤
Ta
≤
+
85
°
C
−
±
130
−
ppm/
°
C1
Current consumption
during operation I
SS1
V
IN
= V
OUT(S)
+
1.0 V, ON / OFF pin = ON, no load
−
20 30
μ
A 2
Current consumption
during power-off I
SS2
V
IN
= V
OUT(S)
+
1.0 V, ON / OFF pin = OFF, no load
−
0.1 1.0
μ
A 2
Input voltage V
IN
−
1.5
−
5.5 V
−
ON / OFF pin input voltage "H" V
SH
V
IN
= V
OUT(S)
+
1.0 V, R
L
= 1.0 k
Ω
determined by V
OUT
output level 1.0
−
−
V
4
ON / OFF pin input voltage "L" V
SL
V
IN
= V
OUT(S)
+
1.0 V, R
L
= 1.0 k
Ω
determined by V
OUT
output level
−
−
0.25 V 4
B / D type
(without pull-down registor)
−
0.1
−
0.1
μ
A 4
ON / OFF pin input current "H" I
SH
V
IN
= 5.5 V,
V
ON / OFF
= 5.5 V A / C type
(with pull-down registor) 1.0 2.5 5.0
μ
A 4
ON / OFF pin input current "L" I
SL
V
IN
= 5.5 V, V
ON / OFF
= 0 V
−
0.1
−
0.1
μ
A 4
1.0 V
≤
V
OUT(S)
≤
1.2 V
−
75
−
dB 5
1.2 V < V
OUT(S)
≤
2.85 V
−
70
−
dB 5
Ripple rejection
RR
V
IN
= V
OUT(S)
+
1.0 V,
f = 1.0 kHz,
Δ
V
rip
= 0.5 Vrms,
I
OUT
= 30 mA 2.85 V < V
OUT(S)
≤
3.5 V
−
65
−
dB 5
Short-circuit current I
short
V
IN
= V
OUT(S)
+
1.0 V, ON / OFF pin = ON, V
OUT
= 0 V
−
50
−
mA 3
Thermal shutdown detection
temperature T
SD
Junction temperature
−
150
−
°
C
−
Thermal shutdown
release temperature T
SR
Junction temperature
−
120
−
°
C
−
"L" output Nch ON resistance R
LOW
V
OUT
= 0.1 V,
V
IN
= 5.5 V A / B type
(with discharge shuntfunction)
−
35
−
Ω
3
Power-off pull-down resistor R
PD
−
A / C type
(with pull-down registor) 1.0 2.2 5.0 M
Ω
4
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 13
*1. VOUT(S): Set output voltage
VOUT(E): Actual output voltage
Output voltage when fixing IOUT (= 30 mA) and inputting VOUT(S) + 1.0 V
*2. The output current at which the output voltage becomes 95% of VOUT(E) after gradually increasing the output current .
*3. Vdrop = VIN1 − (VOUT3 ×
0.98)
V
OUT3 is the output volt age when VIN
=
VOUT(S) + 1.0 V and IOUT
=
100 mA.
VIN1 is the input voltage at which the output voltage becomes 98% of VOUT3 after gradually decreasing the input
voltage.
*4. A change in the temperature of the out put voltage [mV/°C] is calculated using the following equation.
ΔVOUT
ΔTa []
mV/°C *1 = VOUT(S) []
V*2 × ΔVOUT
ΔTa•VOUT []
ppm/°C *3 ÷ 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coef ficient
*5. The output current can be at least this value.
Due to restrictions on the package power dissipation, this value may not be satisfied. Attention should be paid to the
power dissipation of the package when the output current is large.
This specification is guaranteed by design.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
14
Test Circuits
+
VOUT
VIN
VSS
+
V
A
ON / OFF
Set to ON
Figure 10 Test Circuit 1
VOUT
VIN
Set to V
IN
or GND
+ A
ON / OFF VSS
Figure 11 Test Circuit 2
Set to ON
VOUT
VIN
+
V
+A
ON / OFF VSS
Figure 12 Test Circuit 3
VOUT
VIN
+
V
ON / OFF VSS
+ A R
L
Set to V
IN
or GND
Figure 13 Test Circuit 4
VOUT
VIN
+
V
ON / OFF VSS R
L
Set to ON
Figure 14 Test Circuit 5
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 15
Standard Circuit
C
IN*1
C
L*2
Input
Output
GND
Single GND
VOUT
VIN
VSS
ON / OFF
*1. C
IN is a capacitor for stabilizing the input.
*2. A ceramic capacitor of 0.22 μF or more can be used as CL.
Figure 15
Caution The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Condition of Application
Input capacitor (CIN): 0.22 μF or more
Output capacitor (CL): 0.22 μF or more
Caution Generally a series regulator may cause oscillation, depending on the selection of external parts.
Confirm that no oscillation occurs in the application for which the above capacitors are used.
Selection of Input and Output Capacitors (CIN, CL)
The S-1312 Series requires an output capacitor between the VOUT pin and the VSS pin for phase compensation.
Operation is stabilized by a ceramic capacitor with an output capacitance of 0.22 μF or more over the entire temperature
range. When using an OS capacitor, a tantalum capacitor, or an aluminum electrolytic capacitor, the capacitance must
be 0.22 μF or more.
The value of the output overshoot or undershoot transient response varies depending on the value of the output
capacitor. The required capacitance of the input capacitor differs depending on t he application.
The recommended capacitance for an application is CIN ≥ 0.22 μF, CL ≥ 0.22 μF; however, when selecting the output
capacitor, perform sufficient evaluation, including evaluation of temperature characteristics, on the actual device.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
16
Explanation of Terms
1. Low dropout voltage regulator
This voltage regulator has the low dropout voltage due to its built-in low on-resistance transistor.
2. Output voltage (VOUT)
The accuracy of the output voltage is ensured at ±1.0% or ±15 mV*1 under the specified conditions of fixed input
voltage*2, fixed output current, and fixed temperature.
*1. When VOUT < 1.5 V: ±15 mV, when VOUT ≥ 1.5 V: ±1.0%
*2. Differs depending on the product.
Caution If the above conditions change, the output voltage value may vary and exceed the accuracy range
of the output voltage. Refer to " Electrical Characteristics" and " Characteristics (Typical Data)"
for details.
3. Line regulation ⎝
⎛⎠
⎞
ΔVOUT1
ΔVIN•VOUT
Indicates the dependency of the output voltage on the input voltage. That is, the values show how much the output
voltage changes due to a change in the input voltage with the output current remaining unchanged.
4. Load regulation (ΔVOUT2)
Indicates the dependency of the output volt age on the output current. T hat is, the values show how much the output
voltage changes due to a change in the output current with the input voltage remaining unchanged.
5. Dropout voltage (Vdrop)
Indicates the difference between input voltage VIN1 and the output voltage when; decreasing input voltage VIN
gradually until the output voltage has dropped out to the value of 98% of output voltage VOUT3, which is at VIN
= VOUT(S) + 1.0 V.
Vdrop = VIN1 − (VOUT3 × 0.98)
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 17
6. Output voltage temperature coefficient ⎝
⎛⎠
⎞
ΔVOUT
ΔTa•VOUT
The shaded area in Figure 16 is the range where VOUT varies in the operation temperature range when the output
voltage temperature coefficient is ±130 ppm/ °C.
V
OUT(E)*1
Example of S-1312A10 typ. product
−40 +25
+0.13 mV/°C
V
OUT
[V]
*1. V
OUT(E)
is the value of the output voltage measure d at T a = +25°C.
+85 Ta [°C]
−0.13 mV/°C
Figure 16
A change in the temperature of the output voltage [mV/°C] is calculated using the f ollowing equation.
ΔVOUT
ΔTa []
mV/°C *1 = VOUT(S) []
V*2 × ΔVOUT
ΔTa•VOUT []
ppm/°C *3 ÷ 1000
*1. Change in temperature of output voltage
*2. Set output voltage
*3. Output voltage temperature coefficient
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
18
Operation
1. Basic operation
Figure 17 shows t he block diagram of the S-1312 Series.
The error amplifier compares the reference voltage (Vref) with feedback voltage (Vfb), which is the output voltage
resistance-divided by feedback resistors (Rs and Rf). It supplies the gate voltage necessary to maintain the constant
output voltage which is not influenced by the input voltage and temperature change, to the output transistor.
*1
*1. Parasitic diode
VSS
Current
supply
−
+
Vfb
Vref
VIN
VOUT
Rf
Rs
Error
amplifier
Reference voltage
circuit
Figure 17
2. Output transistor
In the S-1312 Series, a low on-resistance P-channel MOS FET is used as the output transistor.
Be sure that VOUT does not exceed VIN + 0.3 V to prevent the voltage regulator from being damaged due to inverse
current flowing from the VOUT pin through a parasitic diode to the VIN pin.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 19
3. ON / OFF pin
This pin starts and stops t he regulator.
When the ON / OFF pin is set to OFF level, the entire internal circuit stops operating, and the built-in
P-channel MOS FET output transistor between the VIN pin and the VOUT pin is turned off, reducing current
consumption significantly.
Note that the current consumption increases when a voltage of 0.25 V to VIN − 0.3 V is applied to the ON / OFF pin.
The ON / OFF pin is configured as shown in Figure 18 and Figure 19.
3. 1 S-1312 Series A / C type
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS
level.
For the ON / OFF pin current, refer to the A / C type of the ON / OFF pin input current "H" in " Electrical
Characteristics".
3. 2 S-1312 Series B / D type
The ON / OFF pin is int ernally not pulled up or pulled down, so do not use this pin in the floating status. When not
using the ON / OFF pin, connect the pin to the VIN pin.
Table 13
Product Type ON / OFF Pin Internal Circuit VOUT Pin Voltage Current Consumption
A / B / C / D "H": ON Operate Set value ISS1*1
A / B / C / D "L": OFF Stop VSS level ISS2
*1. Note that the IC' s current consumption increases as much as current flows into the pull-down resist or when
the ON / OFF pin is connected to the VIN pin and t he S-1312 Series A / C type is operating (refer to Figure
18).
VSS
VIN
ON / OFF
VSS
VIN
ON / OFF
Figure 18 S-1312 Series A / C type Figure 19 S-1312 Series B / D type
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
20
4. Discharge shunt function (S-1312 Series A / B type)
The S-1312 Series A / B type has a built-in discharge shunt circuit to discharge the output capacitance. The output
capacitance is discharged as follows so that the VOUT pin reaches the VSS level.
(1) The ON / OFF pin is set to OFF level.
(2) The output transistor is turned off.
(3) The discharge shunt circuit is turned on.
(4) The output capacitor discharges.
Since the S-1312 Series C / D type does not have a discharge shunt circuit, the VOUT pin is set to the VSS level
through several hundred kΩ internal divided resistors between the VOUT pin and the VSS pin. The S-1312 Series A / B
type allows the VOUT pin to reach the VSS level rapidly due to the discharge shunt circuit.
Output transistor : OFF
ON / OFF pin
: OFF
VIN
ON / OFF
VSS
ON / OFF circuit
Discharge shunt circuit
: ON
VOUT
*1
*1. Parasitic diode
Current flow
GND
*1
S-1312 Series
Output
capacitor
(C
L
)
Figure 20
5. Pull-down resistor (S-1312 Series A / C type)
The ON / OFF pin is internally pulled down to the VSS pin in the floating status, so the VOUT pin is set to the VSS level.
Note that the IC's current consumption increases as much as current flows into the pull-down resistor of 2.2 MΩ typ.
when the ON / OFF pin is connected to the VIN pin and the S-1312 Series A / C type is operating.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 21
6. Overcurrent protection circuit
The S-1312 Series includes an overcurrent protection circuit having the characteristics shown in "1. Output voltage
vs. Output current (When load current increases) (Ta = +25°C)" in " Characteristics (Typical Data)", in order to
protect the output transistor against an excessive output current and short circuiting between the VOUT pin and the
VSS pin. The current (Ishort) when the output pin is short-circuited is internally set at approx. 50 mA typ., and the normal
value is restored for the output voltage, if releasing a short circuit once.
Caution This overcurrent protection circuit does not work as for thermal protection. If this IC long keeps
short circuiting inside, pay attention to the conditions of input voltage and load current so that,
under the usage conditions including short circuit, the loss of the IC will not exceed power
dissipation of the package.
7. Thermal shutdown circuit
The S-1312 Series has a thermal shutdown circuit to protect the device from damage due to overheat. When the
junction temperature rises to 150°C typ., the thermal shutdown circuit operates to stop regulating. W hen the junction
temperature drops to 120°C typ., the thermal shutdown circuit is released to restart regulating.
Due to self-heating of the S-1312 Series, if the thermal shutdown circuit starts operating, it stops regulating so that the
output voltage drops. When regulation stops, the S-1312 Series does not itself generate heat and the IC's
temperature drops. When the temperature drops, the thermal shutdown circuit is released to restart regulating, thus
the S-1312 Series generates heat again. Repeating this procedure makes the waveform of the output voltage into a
pulse-like form. Stop or restart of regulation continues unless decreasing either or both of the input voltage and the
output current in order to reduce the internal power consumption, or decreasing the ambient temperature.
Table 14
Thermal Shutdown Circuit VOUT Pin Voltage
Operate: 150°C typ.*1 VSS level
Release: 120°C typ.*1 Set value
*1. Junction temperature
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
22
Precautions
• Wiring patterns for the VIN pin, the VOUT pin and GND should be designed so that the impedance is low. When
mounting an output capacitor between the VOUT pin and the VSS pin (CL) and a capacitor for stabilizing the input
between the VIN pin and the VSS pin (CIN), the distance from the capacitors to these pins should be as short as
possible.
• Note that generally the output voltage may increase when a series regulator is used at low load current (1.0 mA or
less).
• Note that generally the output voltage may increase due to the leakage current from an output driver when a series
regulator is used at high temperature.
• Note that the output volt age may increase due to the leakage current from an output driver even if the ON / OFF pin is
at OFF level when a series regulator is used at high temperature.
• Generally a series regulator may cause oscillation, depending on the selection of external parts. The following
conditions are recommended for the S-1312 Series. However, be sure t o perform suff icient evaluat ion under the actual
usage conditions for selection, including evaluation of temperature characteristics. Refer to "5. Example of
equivalent series resistance vs. Output current characteristics (Ta = +25°C)" in " Reference Data" for the
equivalent series resistance (RESR) of the output capacitor.
Input capacitor (CIN): 0.22 μF or more
Output capacitor (CL): 0.22 μF or more
• The voltage regulator may oscillate when the impedance of the power supply is high and the input capacitance is small
or an input capacitor is not connected.
• If the output capacitance is small, power supply's fluctuati on and the characteristics of load fluctuation become worse.
Sufficiently evaluate the output voltage's fluctuation with the actual device.
• Overshoot may occur in the output volt age momentarily if the voltage is rapidly raised at power-on or when the power
supply fluctuates. Sufficiently evaluate the output voltage at power-on with the actual device.
• The application conditions for the input voltage, the output voltage, and the load current should not exceed the
package power dissipation.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
• In determining the output current, attention should be paid to the output current value specified in Table 12 in
"
Electrical Characteristics" and f ootnote *5 of the table.
• SII claims no responsibility for any disputes arising out of or in connection with any infringement by products including
this IC of patents owned by a third party.
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 23
Characteristics (Typical Data)
1. Output voltage vs. Output current (When load current increases) (Ta = +25°C)
1. 1 VOUT = 1.0 V 1. 2 VOUT = 2.5 V
0
V
OUT
[V]
0
I
OUT
[mA]
1.2
500400300200100
1.0
0.8
0.6
0.4
0.2
V
IN
= 1.3 V
V
IN
= 1.5 V
V
IN
= 5.5 V
V
IN
= 3.0 V
V
IN
= 2.0 V
0
V
OUT
[V]
0
I
OUT
[mA]
3.0
500400300200100
2.5
2.0
1.5
1.0
0.5
V
IN
= 2.8 V
V
IN
= 3.0 V
V
IN
= 3.5 V
V
IN
= 4.5 V
V
IN
= 5.5 V
1. 3 VOUT = 3.5 V
0
V
OUT
[V]
0
I
OUT
[mA]
4.0
500400300200100
3.5
3.0
2.5
2.0
1.5
1.0
0.5
V
IN
= 3.8 V
V
IN
= 4.0 V
V
IN
= 4.5 V
V
IN
= 5.5 V
Remark In det ermining the output current, at tention should
be paid to the following.
1. The minimum output current value and
footnote *5 in Table 12 in " Electrical
Characteristics"
2. The package power dissipation
2. Output voltage vs. Input voltage (Ta = +25°C)
2. 1 VOUT = 1.0 V 2. 2 VOUT = 2.5 V
0.6
V
OUT
[V]
0.6
V
IN
[V]
1.2
2.62.21.81.41.0
1.1
1.0
0.9
0.8
0.7
I
OUT
= 1 mA
I
OUT
= 50 mA
I
OUT
= 30 mA
I
OUT
= 100 mA
2.0
VOUT [V]
2.0
VIN [V]
2.7
2.6
2.5
2.4
2.3
2.2
2.1
4.54.03.53.02.5
IOUT = 1 mA
IOUT = 50 mA
IOUT = 30 mA
IOUT = 100 mA
2. 3 VOUT = 3.5 V
3.0
V
OUT
[V]
3.0
V
IN
[V]
3.7
3.6
3.5
3.4
3.3
3.2
3.1
5.55.04.54.03.5
I
OUT
= 1 mA
I
OUT
= 50 mA
I
OUT
= 30 mA
I
OUT
= 100 mA
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
24
3. Dropout voltage vs. Output current
3. 1 VOUT = 1.0 V 3. 2 VOUT = 2.5 V
0 50 100
V
drop
[V]
0
I
OUT
[mA]
7525
0.8
125 150
0.7
0.6
0.5
0.4
0.3
0.2
0.1
Ta =
+
25
°C
Ta =
+
85
°C
Ta
=
−40°C
0 50 100
V
drop
[V]
0
I
OUT
[mA]
7525
0.40
125 150
0.35
0.30
0.25
0.20
0.15
0.10
0.05
Ta = +85
°C
Ta =
+
25
°C
Ta
=
−40°C
3. 3 VOUT = 3.5 V
0 50 100
V
drop
[V]
0
I
OUT
[mA]
7525
0.30
125 150
0.25
0.20
0.15
0.10
0.05
Ta = +85
°C
Ta =
+
25
°C
Ta
=
−40°C
4. Dropout voltage vs. Set output voltage
1.0 2.0 2.5
V
drop
[V]
0.6
V
OUT(S)
[V]
1.5 3.0 3.5
0.5
0.4
0.3
0.2
0.1
0
I
OUT
= 30 mA
I
OUT
= 150 mA
I
OUT
= 100 mA
I
OUT
= 50 mA I
OUT
=
10 mA
I
OUT
=
1 mA
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 25
5. Output voltage vs. Ambient temperature
5. 1 VOUT = 1.0 V 5. 2 VOUT = 2.5 V
−40 0 255075
V
OUT
[V]
1.10
1.00
0.95
0.90
Ta [°C]
1.05
−25 85
−40 0 255075
VOUT [V]
2.7
2.5
2.4
2.3
Ta [°C]
2.6
−25 85
5. 3 VOUT = 3.5 V
−40 0 255075
V
OUT
[V]
3.8
3.2
Ta [°C]
−25 85
3.7
3.6
3.5
3.4
3.3
6. Current consumption vs. Input voltage
6. 1 VOUT = 1.0 V 6. 2 VOUT = 2.5 V
024
031
35
56
30
25
20
15
10
5
I
SS1
[μA]
V
IN
[V]
Ta =
+
85
°C
Ta =
+
25
°C
Ta =
−40
°C
024
031
35
56
30
25
20
15
10
5
I
SS1
[μA]
V
IN
[V]
Ta =
+
85
°C
Ta =
−40
°C
Ta =
+
25
°C
6. 3 VOUT = 3.5 V
024
031
35
56
30
25
20
15
10
5
I
SS1
[μA]
V
IN
[V]
Ta =
+
85
°C
Ta =
+
25
°C
Ta =
−40
°C
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
26
7. Ripple rejection (Ta = +25°C)
7. 1 VOUT = 1.0 V VIN = 2.0 V, CL = 0.22 μF 7. 2 VOUT = 2.5 V VIN = 3.5 V, CL = 0.22 μF
10 100 1k 10k 100k
Ripple Rejection [dB]
0
20
40
60
80
Frequency [Hz] 1M
100
IOUT = 150 mA
IOUT = 1 mA
IOUT = 100 mA
IOUT = 30 mA
10 100 1k 10k 100k
Ripple Rejection [dB]
0
20
40
60
80
Frequency [Hz] 1M
100
IOUT = 150 mA
IOUT = 1 mA
IOUT = 100 mA
IOUT = 30 mA
7. 3 VOUT = 3.5 V VIN = 4.5 V, CL = 0.22 μF
10 100 1k 10k 100k
Ripple Rejection [dB]
0
20
40
60
80
Frequency [Hz] 1M
100
I
OUT
= 150 mA
I
OUT
= 1 mA
I
OUT
= 100 mA
I
OUT
= 30 mA
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 27
Reference Data
1. Transient response characteristics when input (Ta = +25°C)
1. 1 VOUT = 1.0 V 1. 2 VOUT = 2.5 V
I
OUT
= 30 mA, C
L
= 0.22
μ
F, V
IN
= 2.0 V
↔
3.0 V, t
r
=
t
f
= 5.0
μ
s
VOUT [V]
1.12
1.10
1.08
1.06
1.04
1.02
1.00
0.98
0.96
t [μs]
VIN [V]
4.0
3.0
2.5
2.0
0
0.5
1.0
1.5
3.5
−20 80 1200 20 40 60 100 140−40
VOUT
VIN
I
OUT
= 30 mA, C
L
= 0.22
μ
F, V
IN
= 3.5 V
↔
4.5 V, t
r
= t
f
= 5.0
μ
s
V
OUT
[V]
2.74
2.70
2.66
2.62
2.58
2.54
2.50
2.46
2.42
t [μs]
V
IN
[V]
5.0
4.0
3.5
3.0
1.0
1.5
2.0
2.5
4.5
−20 80 1200 20 40 60 100 140−40
V
OUT
V
IN
1. 3 VOUT = 3.5 V
I
OUT
=30 mA, C
L
= 0.22
μ
F, V
IN
= 4.5 V
↔
5.5 V, t
r
=
t
f
= 5.0
μ
s
VOUT [V]
3.74
3.70
3.66
3.62
3.58
3.54
3.50
3.46
3.42
t [μs]
VIN [V]
6.0
5.0
4.5
4.0
2.0
2.5
3.0
3.5
5.5
−20 80 1200 20 40 60 100 140−40
VOUT
VIN
2. Transient response characteristics of load (Ta = +25°C)
2. 1 VOUT = 1.0 V 2. 2 VOUT = 2.5 V
VIN = 2.0 V, CIN = CL = 0.22 μF, IOUT = 50 mA ↔ 100 mA
V
OUT
[V]
1.20
0.90
t [μs]
150
−150
60−20
100
50
0
−50
−100
1.15
1.10
1.05
1.00
0.95
I
OUT
[mA]
50403020100−10
V
OUT
I
OUT
VIN = 3.5 V, CIN = CL = 0.22 μF, IOUT = 50 mA ↔ 100 mA
V
OUT
[V]
2.70
2.40
t [μs]
150
−150
60−20
100
50
0
−50
−100
2.65
2.60
2.55
2.50
2.45
I
OUT
[mA]
50403020100−10
V
OUT
I
OUT
2. 3 VOUT = 3.5 V
VIN = 4.5 V, CIN = CL = 0.22 μF, IOUT = 50 mA ↔ 100 mA
V
OUT
[V]
3.70
3.40
t [μs]
150
−150
60−20
100
50
0
−50
−100
3.65
3.60
3.55
3.50
3.45
I
OUT
[mA]
50403020100−10
V
OUT
I
OUT
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
28
3. Transient response characteristics of ON / OFF pin (Ta = +25°C)
3. 1 VOUT = 1.0 V 3. 2 VOUT = 2.5 V
VIN = 2.0 V, CIN = CL = 0.22 μF, IOUT = 100 mA,
VON / OFF = 0 V → 2.0 V, tr = 1.0 μs
−50
0
2.4
200
2.0
1.6
1.2
0.8
0.4
150100500
VOUT [V]
t [μs]
VON / OFF [V]
3
2
1
0
−1
−2
−3
VOUT
VON / OFF
VIN = 3.5 V, CIN = CL = 0.22 μF, IOUT = 100 mA,
VON / OFF = 0 V → 3.5 V, tr = 1.0 μs
−50
0
6
200
5
4
3
2
1
150100500
V
OUT
[V]
t [μs]
V
ON / OFF
[V]
6
4
2
0
−2
−4
−6
V
OUT
V
ON / OFF
3. 3 VOUT = 3.5 V
VIN = 4.5 V, CIN = CL = 0.22 μF, IOUT = 100 mA,
VON / OFF = 0 V → 4.5 V, tr = 1.0 μs
−50
0
6
200
5
4
3
2
1
150100500
VOUT [V]
t [μs]
VON / OFF [V]
6
4
2
0
−2
−4
−6
VOUT
VON / OFF
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 29
4. Output capacitance vs. Characteristics of discharge time (Ta = +25°C)
VIN = VOUT + 1.0 V, IOUT = no load,
VON / OFF = VOUT + 1.0 V → VSS, tf = 1.0 μs
t
DSC
[ms]
1.5
1.0
0.5
0
C
L
[μF]
2468
2.0
2.5
010
12
V
OUT(S)
= 1.0 V
V
OUT(S)
= 2.5 V
V
OUT(S)
= 3.5 V
V
OUT
V
ON / OFF
1.0
μ
s
t
DSC
V
OUT
× 10%
V
SS
V
IN
= V
OUT
+ 1.0 V
V
ON / OFF
= V
OUT
+ 1.0 V → V
SS
Figure 21 S-1312 Series A / B type
(with discharge shunt function) Figure 22 Measurement Condition of Discharge Time
5. Example of equivalent series resistance vs. Output current characteristics (Ta = +25°C)
100
0.1 180
I
OUT
[mA]
R
ESR
[Ω]
C
IN
= C
L
= 0.22 μF
0
Stable
CIN
VIN
VSS
S-1312 Series
VOUT
ON / OFF
CL*1
RESR
*1. CL: TDK Corporation C2012X7R1H224K (0.22 μF)
Figure 23 Figure 24
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
30
Marking Specifications
1. SOT-23-5
(1) to (3): Product code (Refer to Product name vs. Product code)
(4): Lot number
123
45
Top view
(1) (2) (3) (4)
Product name vs. Product code
1. 1 S-1312 Series A typ e 1. 2 S-1312 Series B type
Product Code Product Code
Product Name (1) (2) (3) Product Name (1) (2) (3)
S-1312A10-M5T1U3 1 D A
S-1312B10-M5T1U3 1 E A
S-1312A11-M5T1U3 1 D B
S-1312B11-M5T1U3 1 E B
S-1312A12-M5T1U3 1 D C
S-1312B12-M5T1U3 1 E C
S-1312A1C-M5T1U3 1 D 4
S-1312B13-M5T1U3 1 E D
S-1312A13-M5T1U3 1 D D
S-1312B14-M5T1U3 1 E E
S-1312A14-M5T1U3 1 D E
S-1312B15-M5T1U3 1 E F
S-1312A15-M5T1U3 1 D F
S-1312B16-M5T1U3 1 E G
S-1312A16-M5T1U3 1 D G
S-1312B17-M5T1U3 1 E H
S-1312A17-M5T1U3 1 D H
S-1312B18-M5T1U3 1 E J
S-1312A18-M5T1U3 1 D J
S-1312B1J-M5T1U3 1 E K
S-1312A1J-M5T1U3 1 D K
S-1312B19-M5T1U3 1 E L
S-1312A19-M5T1U3 1 D L
S-1312B20-M5T1U3 1 E M
S-1312A20-M5T1U3 1 D M
S-1312B21-M5T1U3 1 E N
S-1312A21-M5T1U3 1 D N
S-1312B22-M5T1U3 1 E O
S-1312A22-M5T1U3 1 D O
S-1312B23-M5T1U3 1 E P
S-1312A23-M5T1U3 1 D P
S-1312B24-M5T1U3 1 E Q
S-1312A24-M5T1U3 1 D Q
S-1312B25-M5T1U3 1 E R
S-1312A25-M5T1U3 1 D R
S-1312B26-M5T1U3 1 E S
S-1312A26-M5T1U3 1 D S
S-1312B27-M5T1U3 1 E T
S-1312A27-M5T1U3 1 D T
S-1312B28-M5T1U3 1 E U
S-1312A28-M5T1U3 1 D U
S-1312B2J-M5T1U3 1 E V
S-1312A2J-M5T1U3 1 D V
S-1312B29-M5T1U3 1 E W
S-1312A29-M5T1U3 1 D W
S-1312B30-M5T1U3 1 E X
S-1312A30-M5T1U3 1 D X
S-1312B31-M5T1U3 1 E Y
S-1312A31-M5T1U3 1 D Y
S-1312B32-M5T1U3 1 E Z
S-1312A32-M5T1U3 1 D Z
S-1312B33-M5T1U3 1 E 1
S-1312A33-M5T1U3 1 D 1
S-1312B34-M5T1U3 1 E 2
S-1312A34-M5T1U3 1 D 2
S-1312B35-M5T1U3 1 E 3
S-1312A35-M5T1U3 1 D 3
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 31
1. 3 S-1312 Series C type 1. 4 S-1312 Series D type
Product Code Product Code
Product Name (1) (2) (3) Product Name (1) (2) (3)
S-1312C10-M5T1U3 1 F A
S-1312D10-M5T1U3 1 G A
S-1312C11-M5T1U3 1 F B
S-1312D11-M5T1U3 1 G B
S-1312C12-M5T1U3 1 F C
S-1312D12-M5T1U3 1 G C
S-1312C13-M5T1U3 1 F D
S-1312D13-M5T1U3 1 G D
S-1312C14-M5T1U3 1 F E
S-1312D14-M5T1U3 1 G E
S-1312C15-M5T1U3 1 F F
S-1312D15-M5T1U3 1 G F
S-1312C16-M5T1U3 1 F G
S-1312D16-M5T1U3 1 G G
S-1312C17-M5T1U3 1 F H
S-1312D17-M5T1U3 1 G H
S-1312C18-M5T1U3 1 F J
S-1312D18-M5T1U3 1 G J
S-1312C1J-M5T1U3 1 F K
S-1312D1J-M5T1U3 1 G K
S-1312C19-M5T1U3 1 F L
S-1312D19-M5T1U3 1 G L
S-1312C20-M5T1U3 1 F M
S-1312D20-M5T1U3 1 G M
S-1312C21-M5T1U3 1 F N
S-1312D21-M5T1U3 1 G N
S-1312C22-M5T1U3 1 F O
S-1312D22-M5T1U3 1 G O
S-1312C23-M5T1U3 1 F P
S-1312D23-M5T1U3 1 G P
S-1312C24-M5T1U3 1 F Q
S-1312D24-M5T1U3 1 G Q
S-1312C25-M5T1U3 1 F R
S-1312D25-M5T1U3 1 G R
S-1312C26-M5T1U3 1 F S
S-1312D26-M5T1U3 1 G S
S-1312C27-M5T1U3 1 F T
S-1312D27-M5T1U3 1 G T
S-1312C28-M5T1U3 1 F U
S-1312D28-M5T1U3 1 G U
S-1312C2J-M5T1U3 1 F V
S-1312D2J-M5T1U3 1 G V
S-1312C29-M5T1U3 1 F W
S-1312D29-M5T1U3 1 G W
S-1312C30-M5T1U3 1 F X
S-1312D30-M5T1U3 1 G X
S-1312C31-M5T1U3 1 F Y
S-1312D31-M5T1U3 1 G Y
S-1312C32-M5T1U3 1 F Z
S-1312D32-M5T1U3 1 G Z
S-1312C33-M5T1U3 1 F 1
S-1312D33-M5T1U3 1 G 1
S-1312C34-M5T1U3 1 F 2
S-1312D34-M5T1U3 1 G 2
S-1312C35-M5T1U3 1 F 3
S-1312D35-M5T1U3 1 G 3
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
32
2. HSNT-4 (1010)
(1) to (3): Product code (Refer to Product name vs. Product code)
(4), (5): Lot number
12
3
4
Top view
(1) (2) (3)
(4) (5)
Product name vs. Product code
2. 1 S-1312 Series A typ e 2. 2 S-1312 Series B type
Product Code Product Code
Product Name (1) (2) (3) Product Name (1) (2) (3)
S-1312A10-A4T2U3 1 D A
S-1312B10-A4T2U3 1 E A
S-1312A11-A4T2U3 1 D B
S-1312B11-A4T2U3 1 E B
S-1312A12-A4T2U3 1 D C
S-1312B12-A4T2U3 1 E C
S-1312A1C-A4T2U3 1 D 4
S-1312B13-A4T2U3 1 E D
S-1312A13-A4T2U3 1 D D
S-1312B14-A4T2U3 1 E E
S-1312A14-A4T2U3 1 D E
S-1312B15-A4T2U3 1 E F
S-1312A15-A4T2U3 1 D F
S-1312B16-A4T2U3 1 E G
S-1312A16-A4T2U3 1 D G
S-1312B17-A4T2U3 1 E H
S-1312A17-A4T2U3 1 D H
S-1312B18-A4T2U3 1 E J
S-1312A18-A4T2U3 1 D J
S-1312B1J-A4T2U3 1 E K
S-1312A1J-A4T2U3 1 D K
S-1312B19-A4T2U3 1 E L
S-1312A19-A4T2U3 1 D L
S-1312B20-A4T2U3 1 E M
S-1312A20-A4T2U3 1 D M
S-1312B21-A4T2U3 1 E N
S-1312A21-A4T2U3 1 D N
S-1312B22-A4T2U3 1 E O
S-1312A22-A4T2U3 1 D O
S-1312B23-A4T2U3 1 E P
S-1312A23-A4T2U3 1 D P
S-1312B24-A4T2U3 1 E Q
S-1312A24-A4T2U3 1 D Q
S-1312B25-A4T2U3 1 E R
S-1312A25-A4T2U3 1 D R
S-1312B26-A4T2U3 1 E S
S-1312A26-A4T2U3 1 D S
S-1312B27-A4T2U3 1 E T
S-1312A27-A4T2U3 1 D T
S-1312B28-A4T2U3 1 E U
S-1312A28-A4T2U3 1 D U
S-1312B2J-A4T2U3 1 E V
S-1312A2J-A4T2U3 1 D V
S-1312B29-A4T2U3 1 E W
S-1312A29-A4T2U3 1 D W
S-1312B30-A4T2U3 1 E X
S-1312A30-A4T2U3 1 D X
S-1312B31-A4T2U3 1 E Y
S-1312A31-A4T2U3 1 D Y
S-1312B32-A4T2U3 1 E Z
S-1312A32-A4T2U3 1 D Z
S-1312B33-A4T2U3 1 E 1
S-1312A33-A4T2U3 1 D 1
S-1312B34-A4T2U3 1 E 2
S-1312A34-A4T2U3 1 D 2
S-1312B35-A4T2U3 1 E 3
S-1312A35-A4T2U3 1 D 3
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 33
2. 3 S-1312 Series C type 2. 4 S-1312 Series D type
Product Code Product Code
Product Name (1) (2) (3) Product Name (1) (2) (3)
S-1312C10-A4T2U3 1 F A
S-1312D10-A4T2U3 1 G A
S-1312C11-A4T2U3 1 F B
S-1312D11-A4T2U3 1 G B
S-1312C12-A4T2U3 1 F C
S-1312D12-A4T2U3 1 G C
S-1312C13-A4T2U3 1 F D
S-1312D13-A4T2U3 1 G D
S-1312C14-A4T2U3 1 F E
S-1312D14-A4T2U3 1 G E
S-1312C15-A4T2U3 1 F F
S-1312D15-A4T2U3 1 G F
S-1312C16-A4T2U3 1 F G
S-1312D16-A4T2U3 1 G G
S-1312C17-A4T2U3 1 F H
S-1312D17-A4T2U3 1 G H
S-1312C18-A4T2U3 1 F J
S-1312D18-A4T2U3 1 G J
S-1312C1J-A4T2U3 1 F K
S-1312D1J-A4T2U3 1 G K
S-1312C19-A4T2U3 1 F L
S-1312D19-A4T2U3 1 G L
S-1312C20-A4T2U3 1 F M
S-1312D20-A4T2U3 1 G M
S-1312C21-A4T2U3 1 F N
S-1312D21-A4T2U3 1 G N
S-1312C22-A4T2U3 1 F O
S-1312D22-A4T2U3 1 G O
S-1312C23-A4T2U3 1 F P
S-1312D23-A4T2U3 1 G P
S-1312C24-A4T2U3 1 F Q
S-1312D24-A4T2U3 1 G Q
S-1312C25-A4T2U3 1 F R
S-1312D25-A4T2U3 1 G R
S-1312C26-A4T2U3 1 F S
S-1312D26-A4T2U3 1 G S
S-1312C27-A4T2U3 1 F T
S-1312D27-A4T2U3 1 G T
S-1312C28-A4T2U3 1 F U
S-1312D28-A4T2U3 1 G U
S-1312C2J-A4T2U3 1 F V
S-1312D2J-A4T2U3 1 G V
S-1312C29-A4T2U3 1 F W
S-1312D29-A4T2U3 1 G W
S-1312C30-A4T2U3 1 F X
S-1312D30-A4T2U3 1 G X
S-1312C31-A4T2U3 1 F Y
S-1312D31-A4T2U3 1 G Y
S-1312C32-A4T2U3 1 F Z
S-1312D32-A4T2U3 1 G Z
S-1312C33-A4T2U3 1 F 1
S-1312D33-A4T2U3 1 G 1
S-1312C34-A4T2U3 1 F 2
S-1312D34-A4T2U3 1 G 2
S-1312C35-A4T2U3 1 F 3
S-1312D35-A4T2U3 1 G 3
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
S-1312 Series Rev.2.2_00
Seiko Instruments Inc.
34
3. HSNT-4 (0808)
(1) to (3): Product code (Refer to Product name vs. Product code)
12
3
4
Top view
(1) (2) (3)
Product name vs. Product code
3. 1 S-1312 Series A typ e 3. 2 S-1312 Series B type
Product Code Product Code
Product Name (1) (2) (3) Product Name (1) (2) (3)
S-1312A10-A4T1U3 1 D A
S-1312B10-A4T1U3 1 E A
S-1312A11-A4T1U3 1 D B
S-1312B11-A4T1U3 1 E B
S-1312A12-A4T1U3 1 D C
S-1312B12-A4T1U3 1 E C
S-1312A1C-A4T1U3 1 D 4
S-1312B13-A4T1U3 1 E D
S-1312A13-A4T1U3 1 D D
S-1312B14-A4T1U3 1 E E
S-1312A14-A4T1U3 1 D E
S-1312B15-A4T1U3 1 E F
S-1312A15-A4T1U3 1 D F
S-1312B16-A4T1U3 1 E G
S-1312A16-A4T1U3 1 D G
S-1312B17-A4T1U3 1 E H
S-1312A17-A4T1U3 1 D H
S-1312B18-A4T1U3 1 E J
S-1312A18-A4T1U3 1 D J
S-1312B1J-A4T1U3 1 E K
S-1312A1J-A4T1U3 1 D K
S-1312B19-A4T1U3 1 E L
S-1312A19-A4T1U3 1 D L
S-1312B20-A4T1U3 1 E M
S-1312A20-A4T1U3 1 D M
S-1312B21-A4T1U3 1 E N
S-1312A21-A4T1U3 1 D N
S-1312B22-A4T1U3 1 E O
S-1312A22-A4T1U3 1 D O
S-1312B23-A4T1U3 1 E P
S-1312A23-A4T1U3 1 D P
S-1312B24-A4T1U3 1 E Q
S-1312A24-A4T1U3 1 D Q
S-1312B25-A4T1U3 1 E R
S-1312A25-A4T1U3 1 D R
S-1312B26-A4T1U3 1 E S
S-1312A26-A4T1U3 1 D S
S-1312B27-A4T1U3 1 E T
S-1312A27-A4T1U3 1 D T
S-1312B28-A4T1U3 1 E U
S-1312A28-A4T1U3 1 D U
S-1312B2J-A4T1U3 1 E V
S-1312A2J-A4T1U3 1 D V
S-1312B29-A4T1U3 1 E W
S-1312A29-A4T1U3 1 D W
S-1312B30-A4T1U3 1 E X
S-1312A30-A4T1U3 1 D X
S-1312B31-A4T1U3 1 E Y
S-1312A31-A4T1U3 1 D Y
S-1312B32-A4T1U3 1 E Z
S-1312A32-A4T1U3 1 D Z
S-1312B33-A4T1U3 1 E 1
S-1312A33-A4T1U3 1 D 1
S-1312B34-A4T1U3 1 E 2
S-1312A34-A4T1U3 1 D 2
S-1312B35-A4T1U3 1 E 3
S-1312A35-A4T1U3 1 D 3
LOW CURRENT CONSUMPTION HIGH RIPPLE-REJECTION LOW DROPOUT CMOS VOLTAGE
REGULATOR
Rev.2.2_00 S-1312 Series
Seiko Instruments Inc. 35
3. 3 S-1312 Series C type 3. 4 S-1312 Series D type
Product Code Product Code
Product Name (1) (2) (3) Product Name (1) (2) (3)
S-1312C10-A4T1U3 1 F A
S-1312D10-A4T1U3 1 G A
S-1312C11-A4T1U3 1 F B
S-1312D11-A4T1U3 1 G B
S-1312C12-A4T1U3 1 F C
S-1312D12-A4T1U3 1 G C
S-1312C13-A4T1U3 1 F D
S-1312D13-A4T1U3 1 G D
S-1312C14-A4T1U3 1 F E
S-1312D14-A4T1U3 1 G E
S-1312C15-A4T1U3 1 F F
S-1312D15-A4T1U3 1 G F
S-1312C16-A4T1U3 1 F G
S-1312D16-A4T1U3 1 G G
S-1312C17-A4T1U3 1 F H
S-1312D17-A4T1U3 1 G H
S-1312C18-A4T1U3 1 F J
S-1312D18-A4T1U3 1 G J
S-1312C1J-A4T1U3 1 F K
S-1312D1J-A4T1U3 1 G K
S-1312C19-A4T1U3 1 F L
S-1312D19-A4T1U3 1 G L
S-1312C20-A4T1U3 1 F M
S-1312D20-A4T1U3 1 G M
S-1312C21-A4T1U3 1 F N
S-1312D21-A4T1U3 1 G N
S-1312C22-A4T1U3 1 F O
S-1312D22-A4T1U3 1 G O
S-1312C23-A4T1U3 1 F P
S-1312D23-A4T1U3 1 G P
S-1312C24-A4T1U3 1 F Q
S-1312D24-A4T1U3 1 G Q
S-1312C25-A4T1U3 1 F R
S-1312D25-A4T1U3 1 G R
S-1312C26-A4T1U3 1 F S
S-1312D26-A4T1U3 1 G S
S-1312C27-A4T1U3 1 F T
S-1312D27-A4T1U3 1 G T
S-1312C28-A4T1U3 1 F U
S-1312D28-A4T1U3 1 G U
S-1312C2J-A4T1U3 1 F V
S-1312D2J-A4T1U3 1 G V
S-1312C29-A4T1U3 1 F W
S-1312D29-A4T1U3 1 G W
S-1312C30-A4T1U3 1 F X
S-1312D30-A4T1U3 1 G X
S-1312C31-A4T1U3 1 F Y
S-1312D31-A4T1U3 1 G Y
S-1312C32-A4T1U3 1 F Z
S-1312D32-A4T1U3 1 G Z
S-1312C33-A4T1U3 1 F 1
S-1312D33-A4T1U3 1 G 1
S-1312C34-A4T1U3 1 F 2
S-1312D34-A4T1U3 1 G 2
S-1312C35-A4T1U3 1 F 3
S-1312D35-A4T1U3 1 G 3
No.
TITLE
SCALE
UNIT
Seiko Instruments Inc.
2.9±0.2
1.9±0.2
0.95±0.1
0.4±0.1
0.16 +0.1
-0.06
123
4
5
No. MP005-A-P-SD-1.2
MP005-A-P-SD-1.2
SOT235-A-PKG Dimensions
mm
No.
TITLE
SCALE
UNIT
Seiko Instruments Inc.
ø1.5 +0.1
-0 2.0±0.05
ø1.0 +0.2
-0 4.0±0.1
1.4±0.2
0.25±0.1
3.2±0.2
123
45
No. MP005-A-C-SD-2.1
MP005-A-C-SD-2.1
SOT235-A-Carrier Tape
Feed direction
4.0±0.1(10 pitches:40.0±0.2)
mm
No.
TITLE
SCALE
UNIT
Seiko Instruments Inc.
12.5max.
9.0±0.3
ø13±0.2
(60°) (60°)
QTY. 3,000
No. MP005-A-R-SD-1.1
MP005-A-R-SD-1.1
SOT235-A-Reel
Enlarged drawing in the central part
mm
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
HSNT-4-B-PKG Dimensions
PL004-A-P-SD-1.0
No. PL004-A-P-SD-1.0
12
4
0.20±0.05
0.65
1.00±0.04
3
0.38±0.02
0.08+0.05
-0.02
The heatsink of back side has different electric
potential depending on the product.
Confirm specifications of each product.
Do not use it as the function of electrode.
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
PL004-A-C-SD-1.0
Feed direction
4.0±0.05
ø1.5
ø0.5
1.12±0.05 0.5±0.05
0.25±0.05
1
2
34
5°
No. PL004-A-C-SD-1.0
2.0±0.05
+0.1
-0
+0.1
-0
HSNT-4-B-Carrier Tape
2.0±0.05
QTY. 10,000
No. PL004-A-R-SD-1.0
PL004-A-R-SD-1.0
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
HSNT-4-B-Reel
11.4±1.0
9.0
ø13±0.2
(60°) (60°)
Enlarged drawing in the central part
+1.0
- 0.0
No.
TITLE
SCALE
UNIT mm
HSNT-4-B-Land Recommendation
Seiko Instruments Inc.
PL004-A-L-SD-1.0
No. PL004-A-L-SD-1.0
0.48±0.02
0.30±0.02
1.02±0.02
0.65±0.02
0.76±0.01
0.65±0.01
0.2
Land Pattern
Metal Mask Pattern
Caution It is recommended to solder the heatsink to a board
in order to ensure the heat radiation.
PKG
0.48±0.02
0.07
0.30±0.01
0.07
0.23±0.01
0.23±0.02
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
HSNT-4-A-PKG Dimensions
PK004-A-P-SD-2.0
No. PK004-A-P-SD-2.0
0.08
0.38±0.02
0.20±0.05
0.40
0.80±0.04
+0.05
-0.02
The heatsink of back side has different electric
potential depending on the product.
Confirm specifications of each product.
Do not use it as the function of electrode.
12
43
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
PK004-A-C-SD-2.0
HSNT-4-A-Carrier Tape
Feed direction
4.0±0.05
2.0±0.05
ø1.5 +0.1
-0
ø0.5
0.93±0.05
1
2
34
5°
No. PK004-A-C-SD-2.0
2.0±0.05
0.5±0.05
0.25±0.05
+0.1
-0
QTY. 10,000
No. PK004-A-R-SD-2.0
PK004-A-R-SD-2.0
No.
TITLE
SCALE
UNIT mm
Seiko Instruments Inc.
HSNT-4-A-Reel
11.4±1.0
9.0
ø13±0.2
(60°) (60°)
Enlarged drawing in the central part
+1.0
- 0.0
No.
TITLE
SCALE
UNIT mm
HSNT-4-A-Land Recommendation
Seiko Instruments Inc.
PK004-A-L-SD-2.0
No. PK004-A-L-SD-2.0
0.32±0.02
0.32±0.02
0.22±0.02
Land Pattern
Metal Mask Pattern
0.82±0.02
0.40±0.02
0.22±0.01
0.46±0.01
0.15
0.40±0.01
0.05
0.05
Caution It is recommended to solder the heatsink to a board
in order to ensure the heat radiation.
PKG
0.17±0.01
0.17±0.02
www.sii-ic.com
• The information described herein is subject to change without notice.
• Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein
whose related industrial properties, patents, or other rights belong to third parties. The application circuit
examples explain typical applications of the products, and do not guarantee the success of any specific
mass-production design.
• When the products described herein are regulated products subject to the Wassenaar Arrangement or other
agreements, they may not be exported without authorization from the approp riate governmental authority.
• Use of the information described herein for other purposes and/or reproduction or copying without the
express permissi on of Seiko Instruments Inc. is strictly prohibited.
• The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, vehicle equipment,
in-vehicle equipment, aviation equipment, aerospace equipment, and nuclear-related equipment, without prior
written permission of Seiko Instrum ents Inc.
• The products described herein are not designed to be radiation-proof.
• Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the
failure or malfunction of semiconductor products may occur. The user of these products should therefore
give thorough consideration to safety design, including redundancy, fire-prevention measures, and
malfunction prevention, to prevent any accidents, fires, or comm unity damage that may ensue.
