APU1205
1
Data and specifications subject to change without notice.
DESCRIPTION
The APU1205 device is an efficient linear voltage regula-
tor with better than 2% initial voltage accuracy, very low
dropout voltage and very low ground current designed
especially for hand held, battery powered applications.
Other features of the device are: TTL compatible enable/
shutdown control input, current limiting and thermal shut-
down.
The APU1205 is available in fixed and adjustable output
voltage versions in a small SOT-23 5-Pin package.
300mA ULTRA LOW DROPOUT POSITIVE
ADJUSTABLE AND FIXED REGULATORS
SOT-23-5L Package
Stable with 2.2mF Ceramic Capacitor
2% Voltage Reference Accuracy
Only 270mV Dropout at 300mA
and 170mV Dropout at 150mA
5mA Quiescent Current in Shutdown
Current Limit and Thermal Shutdown
Logic Input Enable Pin
RoHS Compliant & Halogen-Free
TYPICAL APPLICATION
Figure 1 - Typical application of the APU1205 adjustable voltage regulator.
Figure 2 - Typical application of the APU1205-25 fixed voltage regulator.
Technology Licensed from International Rectifier
APPLICATIONS
Laptop, Notebook & Palmtop computers
Battery Powered Equipments
PCMCIA Vcc & Vpp Regulator
Consumer Electronics
High Efficiency Linear Power Supplies
FEATURES
PACKAGE ORDER INFORMATION
V
IN
V
OUT
R1
R2
C1
2.2uF C2
2.2uF
SD Enable
5
34
V
OUT
Adj
2
1
V
IN
Gnd
En
3.3V 2.5V
C3
1000pF
C1
2.2uF C2
2.2uF
SD Enable
5
3 4
V
OUT
C
BYP
2
1
V
IN
Gnd
En
Vo = 1.253 1+ R1
R2
( )
Advanced Power
Electronics Corp.
200906044C
T
J
(
o
C) Par t Numbe r O u t pu t Volt ag e
0 t o 125 A P U1205Y 5-HF A DJ
0 t o 125 A P U1205Y5-18-HF 1. 8V
0 t o 125 A P U1205Y5-25-HF 2. 5V
0 t o 125 A P U1205Y5-28-HF 2. 8V
0 t o 125 A P U1205Y5-30-HF 3. 0V
0 t o 125 A P U1205Y5-33-HF 3. 3V
0 t o 125 A P U1205Y5-36-HF 3. 6V
2
APU1205
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN) ..................................................... 10V
Enable Input Voltage ................................................. 10V
Storage Temperature Range ....................................... -65°C To 150°C
Operating Junction Temperature Range ...................... 0°C To 150°C
PACKAGE INFORMATION
5-PIN SOT-23 (Y5) 5-PIN SOT-23 (Y5)
ELECTRICAL SPECIFICATIONS
Reference Voltage
(See Table 1 for typical values)
Line Regulation
Load Regulation (Note 1)
Dropout Voltage (Note 2)
Ground Current (Note 3)
Ground Current-SD Activated
Current Limit
Thermal Regulation
Adjust Pin Current
Enable Pin Input LO Voltage
Enable Pin Input HI Voltage
Enable Pin Input LO Current
Enable Pin Input HI Current
uJA=2568C/W
uJA=2568C/W
Unless otherwise specified, these specifications apply over CIN=Co=2.2mF, Io=100mA, VIN(MIN)=2.5V(Adjustable
devices) VIN=Vo + 1V(for fixed voltage devices), VOUT=VFB(for adjustable version only), CBYP=470pF(for fixed voltage devices),
VENB=2V and TA=258C. Typical values refer to TA=258C. Low duty cycle pulse testing is used which keeps junction and
case temperatures equal to the ambient temperature.
En
Adj
Gnd V
IN
V
OUT
Adjustable
321
4 5
Fixed
En
C
BYP
Gnd V
IN
V
OUT
3 2 1
4 5
PARAMETER SYM TEST CONDITION MIN TYP MAX UNITS
Vo + 1V<VIN<10V
1mA<Io<100mA
100mA<Io<300mA
Io=100mA
Io=50mA
Io=150mA
Io=300mA
VEN=2V, Io=100mA
Io=50mA
Io=150mA
Io=300mA
VEN=0V to 0.8V or Open
Vo=0V
VIN=10V, Io=150mA, 10ms Pulse
VIN=2.5V, Vo=VADJ
Regulator OFF
Regulator ON
VEN(L)=0V to 0.8V
VEN(H)=2V to VIN
-2
320
2
0.005
0.8
0.1
10
85
170
270
120
420
2200
7200
5
420
0.05
0.1
0.01
20
2
50
110
220
350
160
600
2900
9500
0.8
%
%/V
%
mV
mA
mA
mA
%/W
mA
V
V
mA
mA
Vo
DVI
DVL
DVI(O)
IQ
IQ(SD)
ICL
DVP
IADJ
VEN(L)
VEN(H)
Advanced Power
Electronics Corp.
APU1205
3
PIN # PIN SYMBOL PIN DESCRIPTION
The input pin of the regulator. Typically a large storage capacitor is connected from
this pin to ground to insure that the input voltage does not sag below the minimum
drop out voltage during the load transient response. This pin must always be higher
than VOUT by at least the amount of the dropout voltage and some margin in order for
the device to regulate properly.
Ground pin. This pin must be connected to the lowest potential in the system and all
other pins must be at higher potential with respect to this pin.
Enable pin. A low signal or left open on this pin shuts down the output. This pin must
be tied HI or to VIN for normal operation.
A resistor divider from this pin to the VOUT pin and ground sets the output voltage. To
minimize the error due to the error amplifier, select the values of the resistor dividers
to be less than 10KV.
A 470 to 1000pF bypass capacitor connected to this pin reduces the output noise.
The output of the regulator. A minimum of 2.2mF with max ESR of 1V capacitor must
be connected from this pin to ground to insure stability.
5-PIN Output
SOT-23 Voltage
APU1205 1.25V
APU1205-18 1.8V
APU1205-25 2.5V
APU1205-28 2.8V
APU1205-30 3.0V
APU1205-33 3.3V
APU1205-36 3.6V
Note 3: Ground current is the regulator quiescent cur-
rent plus the pass transistor current. The total current
from the supply is the sum of the load current plus the
ground pin current.
Note 1: Low duty cycle pulse testing with Kelvin con-
nections is required in order to maintain accurate data.
Note 2: Dropout voltage is defined as the minimum dif-
ferential voltage between VIN and VOUT required to main-
tain regulation at VOUT. It is measured when the output
voltage drops 1% below its nominal value.
PIN DESCRIPTIONS
The output voltage of the adjustable device can be set
using:
Where:
R1 = Resistor connected from output to the Adj pin
R2 = Resistor connected from Adj pin to Gnd
1
2
3
4
4
5
VIN
Gnd
En
Adj
(Adjustable Only)
CBYP
(Fixed Only)
VOUT
Table 1- Nominal output voltage vs. part number.
Vo = 1.253 1+ R1
R2
( )
Advanced Power
Electronics Corp.
4
APU1205
BLOCK DIAGRAM
Figure 3 - APU1205 Adjustable output block diagram.
Figure 4 - APU1205-18, APU1205-25, APU1205-28, APU1205-30, APU1205-33 and
APU1205-36 Fixed output block diagram.
V
IN
En
THERMAL
SHUTDOWN
1.25V
V
OUT
Adj
Gnd
+
1
4
23
5
V
IN
En
THERMAL
SHUTDOWN
1.25V
V
OUT
C
BYP
Gnd
+
1
4
23
5
Advanced Power
Electronics Corp.
Package Outline : SOT-23-5L
MIN NOM MAX
A 1.00 1.10 1.30
A1 0.00 --- 0.10
A2 0.70 0.80 0.90
b 0.30 0.40 0.50
C 0.10 0.15 0.25
D 2.70 2.90 3.10
E 1.40 1.60 1.80
e --- 1.90(TYP) ---
H 2.60 2.80 3.00
L 0.37 --- ---
θ10° 5° 9°
e1 --- 0.95(TYP) ---
Note 1：Package Body Sizes Exclude Mold Flash Protrusions or Gate Burrs.
Note 2：Tolerance ± 0.1000 mm(4mil) Unless Otherwise Spe- cified.
Note 3：Coplanarity：0.1000 mm
Note 4：Dimension L Is Measured in Gage plane.
Part Marking Information & Packing : SOT-23-5L
Draw No. M1-A-5-G-v00
ADVANCED POWER ELECTRONICS CORP.
SYMBOLS Millimeters
RB&SS
Part Number
Date Code : SS
SS:2004,2008,2012…
SS:2003,2007,2011…
SS:2002,2006,2010…
SS:2001,2005,2009…
Vout. A : 1.8V D : 3.0V
Blank : Adj
C : 2.8V F : 3.6V
B : 2.5V E : 3.3V
5
