NJM2828
Negative Output Low Drop Out voltage regulator
GENERAL DESCRIPTION
The NJM2828 is a negative output low dropout regulator.
Advanced bipolar technology achieves low noise, high precision
voltage and high ripple rejection.
It has soft-start and shunt SW function. 1.0µF Output capacitor
and small package can make NJM2828 suitable for portable items.
FEATURES
Low Current Consumption 0.13V (typ.) @Io=60mA
High Precision Output
±1.5%
High Ripple Rejection
65dB(typ.) @f=1kHz, Vo=-7V Version
Output capacitor with 1.0F ceramic capacitor.
Output Current
Io(max.)=100mA
ON/OFF Control(Positive voltage control from 0 to +5V)
Soft-start Function
Shunt SW Function
Internal Thermal Overload Protection
Internal Short Circuit Current Limit
Bipolar Technology
Package Outline
SC88A
PIN CONFIGURATION
5
4
1.GND
2.V
IN
3.V
OUT
4.CONTROL
5.CS
PACKAGE OUTLINE
SC88A
NJM2828F3
1 2 3
NJM2828F3-XX
EQUIVALENT CIRCUIT
GND
Thermal
Protection
CS
Bandgap
Reference
Current
Limit
CONTROL
V
IN
Output
Control
V
OUT
Ver.2012-09-04
-1-
NJM2828
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
Device Name
NJM2828F3-14
-1.4V
NJM2828F3-06
NJM2828F3-15
-1.5V
NJM2828F3-63
NJM2828F3-02
-2.0V
NJM2828F3-65
NJM2828F3-22
-2.2V
NJM2828F3-07
NJM2828F3-03
-3.0V
NJM2828F3-75
NJM2828F3-04
-4.0V
NJM2828F3-08
NJM2828F3-05
-5.0V
NJM2828F3-85
NJM2828F3-51
-5.1V
NJM2828F3-09
NJM2828F3-55
-5.5V
NJM2828F3-10
V
OUT
-6.0V
-6.3V
-6.5V
-7.0V
-7.5V
-8.0V
-8.5V
-9.0V
-10.0V
Output voltage options available : -1.5 ~ -10.0V (0.1V step)
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
-14
V
Control Voltage
V
CONT
+5
V
Power Dissipation
P
D
250(*1)
mW
Operating
Topr
°C
−40 ∼
+85
Temperature
Storage Temperature
Tstg
°C
−40 ∼
+125
Output Sink Current
I
SINK(OFF)
10
mA
at OFF-state
(*1): Mounted on glass epoxy board. (114.3×76.2×1.6mm : 2layer,FR-4)
Operating voltage
V
IN
=-3.2
∼
-12V (In case of Vo>-3.0V version)
-2-
Ver.2012-09-04
NJM2828
ELECTRICAL CHARACTERISTICS
(Vo<-2.2V Version: V
IN
=Vo-1V, V
CONT
=3V, C
IN
=0.1µF, Co=1.0µF, Ta=25°C)
(Vo≥-2.2V Version: V
IN
=-3.2V, V
CONT
=3V, C
IN
=0.1µF, Co=2.2µF(Vo>-2.0V: Co=4.7µF), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
Output Voltage
Vo
Io=30mA
+1.5%
Quiescent Current
I
Q
Io=0mA, except Icont
-
Quiescent Current
V
CONT
=0V
-
I
Q(OFF)
at OFF-state
Output Current
Io
V
O
+0.3V
100
-
Line Regulation
V
IN
=Vo-1V∼ -12V, Io=30mA
∆Vo/∆V
IN
Load Regulation
-
∆Vo/∆Io
Io=0∼60mA
Io=60mA
-
Dropout Voltage(*2)
∆V
I_O
ein=200mVrms, f=1kHz, Io=10mA
Ripple Rejection
RR
-
Vo=-7V Version
Average Temperature
-
Coefficient of Output
∆Vo/∆Ta
Ta=0∼85°C, Io=10mA
Voltage
f=10Hz∼80kHz, Io=10mA,
Output Noise Voltage1
V
NO
-
Vo=-7V Version
CS Terminal Charge Current Ics
V
CS
=0V
4
Output Resistance
V
CONT
=0V, Vo=-7V Version
-
R
O(OFF)
at OFF-state
Control Current
I
CONT
V
CONT
=1.6V
-
Control Voltage for
V
CONT(ON)
1.6
ON-state
Control Voltage for
V
CONT(OFF)
-
OFF-state
Input Voltage
V
IN
-12
(*2):Excludes Vo>-3.0V version.
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.
TYP.
-
130
-
130
-
-
0.13
65
±50
100
5
360
2
-
-
-
MAX.
-1.5%
200
100
-
0.10
0.03
0.23
-
-
-
6
-
4
-
0.6
-
UNIT
V
µA
nA
mA
%/V
%/mA
V
dB
ppm/°C
µVrms
µA
Ω
µA
V
V
V
Ver.2012-09-04
-3-
NJM2828
TEST CIRCUIT
V
IN
0.1µF
A
GND
I
Q
(Ceramic)
I
OUT
1.0µF
*3
V
OUT
V
V
OUT
V
IN
0.047µF
ＮＪＭ
2828
A
V
V
CONT
I
CONT
CONTROL
CS
*3
-2.2V≤Vo< -2.0V version : Co=2.2µF(Ceramic)
Vo≥-2.0V version : Co=4.7µ F(Ceramic)
-4-
Ver.2012-09-04
NJM2828
TYPICAL APPLICATIONS
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.
0.1µF
(Ceramic
1.0µF
*4
V
IN
V
IN
GND
V
OUT
V
OUT
Cs=0.047µF
ＮＪＭ2828
CONTROL
CONTROL
R
*4
-2.2V≤Vo< -2.0V version : Co=2.2µF
Vo≥-2.0V version : Co=4.7µ F
CS
CS
*In the case of using a resistance "R" between V
IN
and control.
If this resistor is inserted, it can reduce the control current when the control voltage is high.
The applied voltage to control terminal should set to consider voltage drop through the resistor “R” and the minimum
control voltage for ON-state.
The V
CONT (ON)
and I
CONT
have temperature dependence as shown in the "Control Current vs. Temperature" and "
Control Voltage vs. Temperature" characteristics. Therefore, the resistance "R" should be selected to consider the
temperature characteristics.
*Input Capacitance C
IN
Input Capacitor C
IN
is required to prevent oscillation and reduce power supply ripple for applications when high
power supply impedance or a long power supply line.
Therefore, use the recommended C
IN
value (refer to conditions of ELECTRIC CHARACTERISTIC) or larger and
should connect between GND and V
IN
as shortest path as possible to avoid the problem.
Ver.2012-09-04
-5-
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
