NJM2829
Very Low Output Negative Voltage Regulator
GENERAL DESCRIPTION
The NJM2829 is a negative voltage regulator that delivers up
to 100mA output current with the output voltage of -0.8 to -1.3V
with ON/OFF control.
Advanced Bipolar technology achieves low noise, high ripple rejection,
and high precision voltage.
It has soft-start and shunt SW function. 2.2µF Output capacitor
and small package can make NJM2829 suitable for portable
items
PACKAGE OUTLINE
NJM2829F3
FEATURES
• High Precision Output
VO±1.5%
• High Ripple Rejection
80dB typ. (f=1kHz, VO=-1.0V version )
• Output Capacitor with 2.2µF ceramic capacitor
• Output Current
IO(max)=100mA
• ON/OFF Control (Positive voltage control from 0V to +5V)
• Soft-start Function
• Shunt SW Function
• Built-in Thermal Overload Protection and Short Circuit Current Limit Protection
• Bipolar Technology
• Package Outline
SC-88A
PIN CONNECTION
5
1.
2.
3.
4.
5.
4
1 2 3
GND
VIN
VOUT
CONTROL
CS
NJM2829F3
BLOCK DIAGRAM
GND
Thermal
Protection
Current
Limit
CS
Bandgap
Reference
CONTROL
VIN
Ver.2011-01-27
Output
Control
VOUT
-1-
NJM2829
OUTPUT VOLTAGE LANK LIST
Vout
Device Name
NJM2829F3 -008
-0.8V
NJM2829F3 -095
-0.95V
NJM2829F3 -010
-1.0V
NJM2829F3 -012
-1.2V
NJM2829F3 -013
-1.3V
Output Voltage Range: -0.8V to -1.3V
ABABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
-14
V
Control Voltage
VCONT
+5
V
Output Sink Current
10
mA
ISINK(OFF)
at OFF-state
Power Dissipation
PD
250(*1)
mW
Operating Temperature
Topr
- 40 ∼ +85
°C
Storage Temperature
Tstg
- 40 ∼ +125
°C
(*1): Mounted on glass epoxy board. (114.3×76.2×1.6mm : 2layer,FR-4)
OPERATING VOLTAGE
VIN=-3.2 ∼ -12V
ELECTRICAL CHARACTERISTICS
(VIN=3.2V, VCONT=3V, CIN=0.1µF, Co=2.2µF(Vo > -0.9V :Co=4.7µF) , Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP. MAX. UNIT
Output Voltage
Vo
Io=30mA
-1.5%
+1.5%
V
Quiescent Current
IQ
Io=0mA, except Icont
140
220
µA
Quiescent Current
VCONT=0V
100
nA
IQ(OFF)
at OFF-state
100
130
mA
Output Current
Io
VO×0.9
0.10
%/V
Line Regulation
∆Vo/∆VIN VIN=Vo-3.2V∼ -12V, Io=30mA
Load Regulation
0.04 %/mA
∆Vo/∆Io
Io=0∼60mA
VIN=-4.0V,ein=200mVrms,f=1kHz,
80
dB
Ripple Rejection
RR
Io=10mA,Vo=-1.0V Version
Average Temperature
±50
ppm/°C
Coefficient of Output
∆Vo/∆Ta Ta=0∼+85°C, Io=10mA
Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage
VNO
40
µVrms
Vo=--1.0V Version
CS Terminal Charge Current
Ics
VCS=0V
4
5.3
6.5
µA
Output Resistance
VCONT=0V
560
Ω
RO(OFF)
at OFF-state
Control Current
ICONT
VCONT=1.6V
2
4
µA
Control Voltage for
1.6
V
VCONT(ON)
ON-state
Control Voltage for
0.6
V
VCONT(OFF)
OFF-state
Input Voltage
VIN
-12
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.
-2-
Ver.2011-01-27
NJM2829
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2829F3 Power Dissipation
(Topr=-40~+85°C,Tj=125°C)
Power Dissipation PD(mW)
500
400
2Layers board(76.2×114.3×1.6mm, FR-4)
300
200
100
0
-50
-25
0
25
50
75
100
Ambient Temperature Ta(°C)
TEST CIRCUIT
0.1µF
VIN
A
IQ
2.2µF*2
(Ceramic))
GND
IOUT
VOUT
V
VOUT
VIN
0.047µF
NJM2829
A
V
Ver.2011-01-27
ICONT
CONTROL
CS
VCONT
*2) Vo>-0.9V version: Co=4.7µ F(Ceramic)
-3-
NJM2829
TYPICAL APPLICATION
ON/OFF control
ON/OFF control can be achieved by applying positive control voltage to CONTROL terminal.
Apply positive Vcont ("H") to make chip to be ON (Enabled), and either Vcont is "L" or open (High Z) to make chip to
be OFF (Disabled).
The relations between Vcont and the state is as follows:
ON state
Vcont +1.6V ≤ Vcont ≤ +5V ("H" level):
OFF state
Vcont 0V ≤ Vcont ≤ +0.6V ("L" level):
Vcont +0.6V < Vcont < +1.6V ("L" level):
Undefined
In case ON/OFF control is not used, keep applying positive Vcont to CONTROL terminal to make chip ON.
Note that negative Vcont does not make the chip enabled.
2.2µF*3
0.1µF
GND
V IN
V OUT
V IN
V OUT
NJM2829
0.047µF
CONTROL
CS
CONTROL
CS
R
*3) Vo>-0.9V version: Co=4.7µ F(Ceramic)
* 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".
* 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.
*Output Capacitance CO
Output capacitor (Co) is required for a phase compensation of the internal error amplifier. The capacitance and the
equivalent series resistance (ESR) influences stability of the regulator.
This product is designed to work with a low ESR capacitor for the Co; however, use of recommended capacitance or
greater value is essential for stable operation.
Use of a smaller Co may cause excess output noise or oscillation of the regulator due to lack of the phase
compensation.
Therefore, use Co with the recommended capacitance or greater value and connect between Vo terminal and GND
terminal with minimal wiring. The recommended capacitance depends on the output voltage. Low voltage regulator
requires greater value of the Co. Thus, check the recommended capacitance for each output voltage.
Use of a greater Co reduces output noise and ripple output, and also improves transient response of the output
voltage against rapid load change.
-4-
Ver.2011-01-27
NJM2829
TYPICAL CHARACTERISTICS
NJM2829_-1.0V
Output Voltage vs. Input Voltage
1.2
NJM2829_-1.0V
Output Voltage vs. Output Current
o
@:Ta=25 C
Co=2.2uF(Ceramic)
1.2
1
Io=0A
1
0.8
0.8
Io=30mA
0.6
0.6
Io=100mA
0.4
0.4
0.2
0.2
o
@:Ta=25 C
VIN=-3.2V
Co=2.2uF(Ceramic)
0
0
1.6
1.8
2
2.2
2.4
2.6
2.8
0
3
50
NJM2829_-1.0V
Ground Pin Current vs. Output Current
20
100
150
200
Output Current : Io(mA)
Input Voltage : V IN(V)
NJM2829_-1.0V
Load Regulation vs. Output Current
0
o
@ Ta=25C
Vin=-3.2V
Vcont=3V
Co=2.2uF
-10
15
-20
-30
10
-40
-50
5
-60
o
@:Ta=25 C
VIN=-3.2V
Co=2.2uF(Ceramic)
-70
0
0
50
100
150
-80
0
50
Output Current : Io(mA)
NJM2829_-1.0V
Control Current vs. Control Voltage
30
100
150
200
Output Current : Io(mA)
NJM2829_-1.0V
Output Voltage vs. Control Voltage
1.2
o
@:Ta=25 C
VIN=-3.2V
Co=2.2uF(Ceramic)
25
Io=30mA
1
Rc=0Ω
20
0.8
Rc=0Ω
15
0.6
Rc=50kΩ
0.4
Rc=100kΩ
Rc=50kΩ
10
5
o
0.2
Rc=100kΩ
0
@:Ta=25 C
VIN=-3.2V
Co=2.2uF(Ceramic)
Io=30mA
0
0
1
2
3
Control Voltage : V Cont (V)
Ver.2011-01-27
4
5
0
0.5
1
1.5
2
2.5
3
Control Voltage : V Cont (V)
-5-
NJM2829
NJM2829_-1.0V
Quiescent Current vs. Input Voltage
500
NJM2829_-1.0V
Peak Output Current vs. Input Voltage
300
o
o
@:Ta=25 C
Output is open.
Co=2.2uF(Ceramic)
@:Ta=25 C
Co=2.2uF(Ceramic)
250
400
200
300
150
200
100
100
50
0
0
2
4
6
8
10
12
14
0
2
4
6
Input Voltage : V IN(V)
NJM2829_-1.0V
Output Noise Voltage vs. Output Current
120
10
12
14
NJM2829_-1.0V
Ripple Rejection Ratio vs. Frequency
100
o
@:Ta=25 C
VIN=-3.2V
Co= 2.2uF(Ceramic)
4.7uF(Ceramic)
100
8
Input Voltage : V IN(V)
Io=30mA
Io=0mA
90
80
80
Io=100mA
70
FLAT
60
60
50
40
o
@:Ta=25 C
VIN=-3.2V
ein=200mVrms
Co=2.2uF(Ceramic)
40
LPF:80k
20
30
0
1u
10u
100u
1m
10m
100m
20
10
10
100
100k
105
4
10k
10
Frequency : f (Hz)
NJM2829_-1.0V
Ripple Rejection vs. Output Current
100
NJM2829_-1.0V
Equivalent Serise Resistance vs. Output Current
o
@:Ta=25 C
Co=2.2uF(Ceramic)
f=1kHz
90
10
80
70
1k
1000
100
100
Output Current : Io(A)
f=10kHz
STABLE REGION
60
1
50
40
o
@:Ta=25 C
VIN=-3.2V
ein=200mVrms
Co=2.2uF(Ceramic)
30
20
0.001
0.01
0.1
1
Output Current : Io(mA)
-6-
10
0.1
100
0.001
0.01
0.1
1
10
100
Output Current : Io(mA)
Ver.2011-01-27
NJM2829
NJM2829_-1.0V
Control Voltage v.s. Temperature
NJM2829_1.0V
Control Current vs. Temperature
10
2
@:VIN=-3.2V
Output : No Load
Co=2.2uF
Vcont=1.6V
@:VIN=-3.2V
Io=30mA
Co=1uF(Ceramic)
8
1.5
6
1
4
0.5
2
0
0
-50
0
50
100
150
-50
0
50
Temperature : Ta ( C)
NJM2829_-1.0V
CS Charge Current vs. Temperature
10
100
150
o
Temperature : Ta ( C)
o
NJM2829_-1.0V
Quiescent Current vs. Temperature
250
@:VIN=-3.2V
CS is short to ground.(VI)
Co=2.2uF(Ceramic)
8
200
6
150
4
100
2
50
@:VIN=-3.2V
Output is open.
Co=2.2uF(Ceramic)
Icont, including
0
0
-50
0
50
100
-50
150
0
NJM2829_-1.0V
Line Regulation vs. Temperature
0.1
50
100
150
Temperature : Ta ( oC)
Temperature : Ta ( o C)
NJM2829_-1.0V
Load Regulation vs. Temperature
0.03
@:VIN=-3.2V
Io=0-60mA
Co=2.2uF(Ceramic)
@:dVIN=-3.2-12V
Io=30mA
Co=2.2uF(Ceramic)
0.025
0.05
0.02
0.015
0
0.01
-0.05
0.005
-0.1
0
-50
0
50
100
o
Temperature : Ta ( C)
Ver.2011-01-27
150
-50
0
50
100
150
Temperature : Ta ( o C)
-7-
NJM2829
NJM2829_-1.0V
Output Voltage vs. Temperature
1.2
NJM2829_-1.0V
Short Circuit Current vs. Temperature
200
@:VIN=-3.2V
Output is short to ground.(VI)
Co=2.2uF(Ceramic)
0.9
150
0.6
100
0.3
50
@:VIN=-3.2V
Io=30mA
Co=2.2uF(Ceramic)
0
-50
0
0
50
100
150
200
-50
0
o
1.05
50
100
150
Temperature : Ta ( o C)
Temperature Ta ( C)
NJM2829_-1.0V
Output Voltage vs. Temperature
NJM2829_-1.0V
Maximum Output Current vs. Temperature
200
@:VIN=-3.2V
Io=30mA
Co=2.2uF(Ceramic)
1.025
150
1
100
0.975
50
@:VIN=-3.2V
Vo=Vo x 0.9
Co=2.2uF(Ceramic)
0.95
-50
0
50
100
o
Temperature Ta ( C)
-8-
150
0
-50
0
50
100
150
Temperature : Ta ( o C)
Ver.2011-01-27
NJM2829
NJM2829_-1.0V
Load Transient Response
NJM2829_-1.0V
Line Transient Response
-0.88
-1
-0.90
-0.90
-2
-0.92
150
100
-4
@:Ta=25°C
Vcont=3.0V
Io=30mA
Co=2.2uF(ceramic)
Cin=0uF
-0.96
-0.98
-5
-6
-1.00
-7
Output Voltage
-1.02
-1.04
0
40
80
120
160
200
50
-0.96
0
-0.98
-50
-1.00
-100
Output Voltage
-1.02
-8
-1.04
-9
-1.06
0
NJM2829_-1.0V
ON/OFF Transient Response
2
1.5
-2
-4
-0.5
-6
-1
-8
Output Voltage
-1.5
-2
0
10
20
30
Time:t(ms)
40
50
Output Voltage:Vo(V)
2
Control Voltage:Vcont(V)
Output Voltage:Vo(V)
4
0
@:Ta=25°C
Vcont=3.2V
Io=0mA
Co=2.2uF(ceramic)
Cs=0.047uF
0
160
NJM2829_-1.0V
Control Voltage
0.5
120
Time:t(us)
2
1
80
Time:t(µs)
ON/OFF Transient Response without road
1.5
40
@:Ta=25°C
Vcont=3.2V
Io=50-100mA
Co=2.2uF(ceramic)
Cin=0.1uF
-150
-200
200
-250
4
Control Voltage
1
2
0
@:Ta=25°C
Vcont=3.2V
Io=30mA
Co=2.2uF(ceramic)
Cs=0.047uF
0.5
0
-2
-4
-0.5
-6
-1
-8
Output Voltage
-10
-1.5
-12
-2
Output Current:Io(mA)
-0.94
-0.94
Control Voltage:Vcont(V)
-3
Input Voltage
Output Voltage:Vo(V)
-0.92
Input Voltage:Vin(V)
Output Voltage:Vo(V)
Output Current
-10
0
10
20
30
40
50
-12
Time:t(ms)
[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.
Ver.2011-01-27
-9-