NJM2847
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Ver.2010-06-22
Very Low Output Voltage Series Regulator
GENERAL DESCRIPTION PACKAGE OUTLINE
The NJM2847 is a series voltage regulator that delivers up to
150mA output current with the output voltage of 0.8 to 1.4V with
ON/OFF control.
Advanced Bipolar technology achieves low noise, high ripple rejection,
High accuracy and low quiescent current.
Small packaging and 2.2µF small decoupling capacitor make
the NJM2847 suitable for space conscious applications.
FEATURES
• Output Voltage Range 0.8V to 1.4V
• Input Voltage Range 2.3V to 9.0V
• High Ripple Rejection 85dB typ. (f=1kHz, VO=0.8V version)
• Very Low Output Noise Voltage VNO=20µVrms typ. (Cp=0.01µF)
• Output Current IO(max)=150mA
• High Precision Output VO±1.0%
• Output Capacitor with 2.2µF ceramic capacitor
• ON/OFF Control
• Built-in Thermal Overload Protection and Short Circuit Current Limit Protection
• Bipolar Technology
• Package Outline SC-88A
PIN CONNECTION
BLOCK DIAGRAM
VOUT
Thermal
Protection
Bandgap
Reference
Noise
Bypass
VIN
Control
GND
123
45
123
45
1. CONTRO
L
2. GND
3. NOISE BYPASS
4. VOUT
5. VIN
NJM2847F3
NJM2847F3
NJM2847
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OUTPUT VOLTAGE LANK LIST
The WHITE column shows applicable Voltage Rank(s).
Output Voltage Range: 0.8V to 1.4V (0.1V step)
ABABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER SYMBOL RATINGS UNIT
Input Voltage VIN +10 V
Control Voltage VCONT +10 V
Power Dissipation PD 250(*1) mW
Operating Temperature Topr - 40 ∼ +85 °C
Storage Temperature Tstg - 40 ∼ +125 °C
Note1: EIA/JEDEC STANDARD Test board (76.2*114.3*1.6mm, 2layers, FR-4) mounting
BIAS VOLTAGE INPUT RANGE
VIN=+2.3 ∼ +9V
ELECTRICAL CHARACTERISTICS (VIN=2.5V, CIN=0.1µF, Co=2.2µF, Cp=0.01µF, Ta=25 °C)
PARAMETER SYMBOL TEST CONDITION MIN. TYP. MAV. UNIT
Output Voltage Vo Io=30mA -1.0% − +1.0% V
Input Voltage VIN 2.3 − 9 V
Quiescent Current IQ Io=0mA, except Icont − 140 200 µA
Quiescent Current
at Control OFF IQ(OFF) V
CONT=0V − − 100 nA
Output Current Io Vo ×0.9V 150 200 − mA
Line Regulation ∆Vo/∆VIN VIN=2.5V to 9.0V, Io=30mA − − 0.10 %/V
Load Regulation ∆Vo/∆Io Io=0mA to 100mA − − 0.03 %/mA
Dropout Voltage ∆VI-O Io=60mA − 0.10 0.18 V
Ripple Rejection RR ein=200mVrms, f=1kHz, Io=10mA,
Vo=0.8V version − 85 − dB
Average Temperature
Coefficient of Output Voltage ∆Vo/∆Ta Ta=0 °C to +85°C, Io=10mA − ± 50 − ppm/°C
Output Noise Voltage VNO f=10Hz to 80kHz, Io=10mA,
Vo=0.8Vversion − 20 − µVrms
Control Current ICONT V
CONT=1.6V − 3 12
µA
Control Current for ON-state VCONT(ON) 1.6 − − V
Control Current for OFF-state VCONT(OFF) − − 0.6 V
The above specification is a common specification for all output voltages.
Therefore, it may be different from the individual specification for a specific output voltage.
Device Name Vout
NJM2847F3 -008 0.8V
NJM2847F3 -009 0.9V
NJM2847F3 -010 1.0V
NJM2847F3 -011 1.1V
NJM2847F3 -012 1.2V
NJM2847F3 -013 1.3V
NJM2847F3 -014 1.4V
NJM2847
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Ver.2010-06-22
TEST CIRCUIT
NJM2847
VIN
VIN V
OUT
CONTROL NOISE
BYPASS
GND
0.1µF
IIN
ICONT
VCONT
Cp=0.01µF
IOUT VOUT
V
V
A
A
2.2µF
(Ceramic)
TYPICAL APPLICATION
a) In case of where ON/OFF control is not required:
NJM2847
VIN VOUT
CONTROL NOISE
BYPASS
GND
0.1µF
Cp=0.01µF
VOUT
VIN
R
2.2µF
You shall connect control terminal to VIN terminal.
Though the ICONT decreases by inserting "R" to between Control terminal and VBIAS terminal, the minimum operating voltage is
increased due to the resister "R".
NJM2847
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b) In use of ON/OFF control:
NJM2847
VIN V
OUT
CONTROL NOISE
BYPASS
GND
0.1µF
Cp=0.01µF
VOUT
VIN
R
2.2µF
State of control terminal:
•“H”→ output is enabled.
•“L” or “open” → output is disabled.
* Noise bypass Capacitance Cp
Noise bypass capacitance Cp reduces noise generated by band-gap reference circuit.
Noise level and ripple rejection will be improved when larger Cp is used.
Use of smaller Cp value may cause oscillation.
Use the Cp value of 0.01µF greater to avoid the problem.
* Input Capacitance CIN
Input Capacitance CIN is required to prevent oscillation and reduce power supply ripple for applications with high
power supply impedance or a long power supply line.
Use the CIN value of 0.1µF greater to avoid the problem.
CIN should connect between GND and VIN as short as possible.
* In the case of using a resistance "R" between VIN and control.
The current flow into the control terminal while the IC is ON state (ICONT) can be reduced when a pull up resistance
"R" is inserted between VIN and the control terminal.
The minimum control voltage for ON state (VCONT (ON)) is increased due to the voltage drop caused by ICONT and the
resistance "R". The ICONT is temperature dependence as shown in the "Control Current vs. Temperature"
characteristics. Therefore, the resistance "R" should be carefully selected to ensure the control voltage exceeds
the VCONT (ON) over the required temperature range.
NJM2847
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POWER DISSIPATION vs. AMBIENT TEMPERATURE(SC-88A)
NJM2847F3 PowerDissipation
(Topr=-40〜+85°C,Tj=125°C)
0
100
200
300
400
500
-50 -25 0 25 50 75 100
Temperature Ta(°C)
Power Dissipation PD(mW)
onFR-4board(114.3×76.2×1.6mm)
NJM2847
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Typical Characteristics
NJM 2847( mold)_1.2V
Output Voltage vs Input Voltage
0.9
1
1.1
1.2
1.3
1.4
1.3 1.4 1.5 1.6 1.7 1.8 1.9 2
Input Voltage : VIN (V)
Out put Voltage : Vo ( V)
Io=0A
Io= 30mA
Io= 100mA
@: Ta= 25°C
Co= 2.2uF( Ceramic)
NJM 2847( mold)_1.2V
Control Voltage vs Control Current
0
5
10
15
20
25
30
00.51 1.522.5
Control Voltage (V)
Control Curr ent (uA)
Rc=0Ω
Rc=50kΩRc= 100kΩ
@:Ta= 25°C
VIN=2.5V
Co= 2.2uF(Cer amic)
Cp= 0.01uF
Io= 30mA
NJM 2847(mold) _1.2V
Contr ol Vol tag e vs Output Voltag e
0
0.5
1
1.5
2
0 0.5 1 1.5 2 2.5
Control Voltag e (V)
Output Vol tage (V)
Rc=0Ω
Rc=50kΩ
Rc=100kΩ
@:Ta=25°C
VIN=2.5V
Co=2.2uF( Ceramic)
Cp=0.01uF
Io=30mA
NJM2847(mold)_1.2V
Ground Current vs Output Current
0
5
10
15
20
25
30
0 50 100 150 200 250
Output Currnet : Io (mA)
Ground Pin Current : I GND (mA)
@:Ta=25°C
VIN=2.5V
Co=2.2uF( C eramic)
NJM 2847(mold)_1.2V
Over Current Protection vs Output Current
0
0.5
1
1.5
0 50 100 150 200 250 300 350 400
Output Current : Io (mA)
Out put Voltage : Vo ( V)
@:Ta=25°C
VIN =2.5V
Co=2.2uF(Ceramic)
NJM 2847( mold)_1.2V
Dropout Voltage VS Output Current
-50
-40
-30
-20
-10
0
0 50 100 150 200 250
Output Current : Io (mA)
Load Regulation : dVo/dIo (mV)
@: Ta= 25°C
Co=2.2uF( Ceramic)
NJM2847
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Ver.2010-06-22
Typical Characteristics
NJM2847( mold)_1.2V
Quiescent C urrent vs Input Voltage
0
500
1000
1500
2000
2500
0246810
Input Voltag e:VIN ( V)
Quiescent Current:IQ (µA)
@:Ta= 25°C
Output is open
Co= 2.2uF(C er amic)
Inculdin
g
Icont
NJM 2847( mold)_1.2V
Output Noise Voltage vs Output Current
0
20
40
60
80
100
0.001 0.01 0.1 1 10 100 1000
Output Current :Io(mA)
Output Noise Volt age :Vn ( µVrms)
@Ta= 25°C
VIN=2.5V
Co=2.2uF( Ceramic)
Cp=0.01uF
LPF:80k
NJM 2847( mold)_1.2V
Ripple Rejection
20
30
40
50
60
70
80
90
100
0.01 0.1 1 10 100
Frequency :f(kHz)
Ripple Rejection :RR(dB)
Io= 10m
A
Io=0A
@:Ta= 25°C
VIN = 2.5V
ein= 200mVrms
Co= 2.2uF( Ceramic
Io=30mA
NJM 2847( mold)_1.2V
Output Current vs Ripple Rej ection
20
30
40
50
60
70
80
90
100
0.001 0.01 0.1 1 10 100 1000
Output Current :Io(mA)
Ripple Rejection :RR(dB)
@: Ta= 25°C
VIN=2.5V
ein=200mVrms
Co=2.2uF( Ceramic)
f=1kH z f=10kHz
NJM 2847( mold)_1.2v
Equiv alent Serise R esistance v s. Output Current
0.01
0.1
1
10
100
0.001 0.01 0.1 1 10 100 1000
Output Current : Io[mA]
Equivalent Serise Resistance:ESR [Ω]
STABLE REGION
@Ta= 25°C
Co=2.2uF( Ceramic)
Cp=0.01uF
NJM2847
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Typical Characteristics
NJM2847(mold)_1.2V
Output Voltage v s. Temperature
1.10
1.15
1.20
1.25
1.30
-50 0 50 100 150
Temperature:Ta (℃)
Output Voltage : Vo ( V)
@:Vin=2.5V
Io=30mA
Co=2.2
µ
NJM 2847( mold) _1.2V
Control Voltage(off) vs. Temperature
0.0
0.5
1.0
1.5
2.0
-50 0 50 100 150
Temperature:Ta ( ℃)
Control Voltage(OFF) :Vcont- off ( V)
@:Vin=2.5V
Io= 30mA
Co= 2.2uF(Cer amic)
Cp= 0.01uF
NJM 2847( mold) _1.2V
Control current vs. Temperature
0
2
4
6
8
10
12
-50 0 50 100 150
Temperature:Ta ( ℃)
Control current : Icnt (uA)
@:Vin=2.5V
Output is open
Co= 2.2uF(Cer amic)
Cp= 0.01uF
NJM 2847( mold) _1.2V
Quiescent C ur rent vs. Temperature
0
50
100
150
200
250
300
-50 0 50 100 150
Temperature:Ta ( ℃)
Quiescent Current : I Q (mA)
@:Vin=2.5V
Output is open
Co= 2.2uF(Cer amic)
including Icont
NJM2847( mold)_1.2V
Short C ircuit Cur r ent vs. Temperature
0
50
100
150
200
-50 0 50 100 150
Temperature:Ta (℃)
Short C ircuit Cur rent : Isc ( m A)
@:Vin=2.5V
Output is short to g round
Co= 2.2uF(C er amic)
NJM 2847( mold) _1.2V
Line Reg ul ation vs. Temperature
-0.2
-0.1
0
0.1
0.2
-50 0 50 100 150
Temperature:Ta ( ℃)
Line Regulation : dVo/dVin ( %/V)
@:Vin=2.5- 9.0V
Io= 30mA
Co=2.2µF(Ceramic)
NJM2847
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Ver.2010-06-22
Typical Characteristics
NJM2847( mold)_1.2V
Load Reg ulation vs. Temperatur e
0.000
0.005
0.010
0.015
0.020
0.025
0.030
-50 0 50 100 150
Temperature:Ta (℃)
Load Regulati on : dVo/dIo (%/mA)
@:Vin=2.5V
Io= 0- 100mA
Co=2.2
µ
F
(
Ceramic
)
NJM 2847( mold) _1.2V
Output Peak Curr ent vs. Temperatur e
0
50
100
150
200
250
300
350
400
-50 0 50 100 150
Temperature:Ta (℃)
Output Peak Cur rent : Io_peak ( m A
@:Vin=2.5V
Co=2.2µF(Ceramic)
NJM2847( mold)_1.2V
Output Vol tag e vs. Temperature
0.0
0.5
1.0
1.5
2.0
-50 0 50 100 150 200
Temperature:Ta (℃)
Output Voltage : Vo ( V)
@:Vin=2.5V
Io= 30mA
Co=2.2µF(Ceramic)
NJM2847
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Typical Characteristics
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including the
industrial rights.
ON/OFF Transient Response without Load
-30
0
NJM2847_1.2v
5
control Voltage：Vcont(V)
Output Voltage：Vo(V)
65
4-5
-10
2-15
3
0-25
-1
5
Time：t(s)
123
107
4
1-20
0
Output Voltage
Control Voltage
@:Ta=25°C
VIN=2.5V
C
O
=2.2µF(Ceramic)
Cp=0.01mF
ON/OFF Transient Response
0
NJM2847_1.2v
Control Voltage：Vcont(V)
65
50
4-5
3
2-15
Output Voltage：Vo(V)
-10
10
1-20
0-25
16
-1
Time：t(ms)
20
-30
7
4812
Control Voltage
Output Voltage
@:Ta=25°C
VIN=2.5V
C
O
=2.2µF(Ceramic)
Cp=0.01µF
I
O
=30mA
Load Transient Response
-250
0
1.30 150
Output Voltage：Vo(V)
1.28 100
1.26 50
control Voltage：Vcont(V)
1.24 0
1.20 -100
1.22 -50
1.18 -150
1.16 -200
1.14 40 80 120 160 200
Time：t(µs)
NJM2847_1.2v
InputVoltagr
Output Voltage
@:Ta=25°C
V
IN
=2.5V
C
O
=2.2µF(Ceramic
)
Output Current
Output Voltage
Input Transient Response
-4
0
NJM2847_1.2v
Output Voltage：Vo(V)
Input Voltage：VIN(V)
1.28 3
1.26 2
1.24 1
1.22 0
1.20 -1
1.18 -2
1.16 -3
200
1.14
40 80 120 160
Time：t(µs)
1.30 4
Input Voltage
Output Voltage
@:Ta=25°C
CO=2.2µF(Ceramic)
IO=30mA