NJM2892
2ch LOW DROPOUT VOLTAGE REGULATOR
!
GENERAL DESCRIPTION
The NJM2892 is a 2ch low dropout voltage regulator with
ON/OFF control.
Advanced Bipolar technology achieves low noise, high ripple
rejection and low quiescent current.
!
FEATURES
"
High Ripple Rejection
75dB typ. (f=1kHz Vo=3V version)
"
Output Noise Voltage
V
NO
=45µVrms typ.
"
Output capacitor with 1.0µF ceramic capacitor (Vo≥2.7V)
"
Output Current
Io(max.)=100mA x 2ch
"
High Precision Output
Vo±1.0%
"
Low Dropout Voltage
0.1V typ. (Io=60mA)
"
ON/OFF Control
"
Internal Short Circuit Current Limit
"
Internal Thermal Overload Protection
"
Bipolar Technology
"
Package Outline
SOT-23-6 (MTP-6 : 2.8x2.9x1.1mm)
!
PIN CONFIGURATION
!
PACKAGE OUTLINE
NJM2892F1
6 5 4
1 2 3
NJM2892F1
PIN FUNCTION
1. V
OUT
2
2. GND
3. V
OUT
1
4. CONTROL1
5. V
IN
6. CONTROL2
Ver.2006-02-20
-1-
NJM2892
!
EQUIVALENT CIRCUIT
V
IN
Control1
Bandgap
Reference
Thermal
Protection
V
OUT
1
V
OUT
2
Control2
ON/OFF
Control
ON/OFF
Control
GND
NJM2892
!
OUTPUT VOLTAGE RANK LIST
Device Name
V
OUT
Ch 1
Ch 2
NJM2892F1-1515
1.5V
1.5V
NJM2892F1-1815
1.8V
1.5V
NJM2892F1-2121
2.1V
2.1V
NJM2892F1-2518
2.5V
1.8V
NJM2892F1-2618
2.6V
1.8V
NJM2892F1-2815
2.8V
1.5v
NJM2892F1-2818
2.8v
1.8v
NJM2892F1-0303
3.0V
3.0V
NJM2892F1-3328
3.3V
2.8V
NJM2892F1-3303
3.3V
3.0V
NJM2892F1-3333
3.3V
3.3V
NJM2892F1-0521
5.0V
2.1V
NJM2892F1-0533
5.0V
3.3V
-2-
Ver.2006-02-20
NJM2892
!
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Voltage
V
CONT
(Ta=25°C)
RATINGS
UNIT
+14
V
+14(*1)
V
350(*2)
Power Dissipation
P
D
SOT-23-6
mW
200(*3)
Operating Temperature
Topr
−40 ∼
+85
°C
Storage Temperature
Tstg
−40 ∼
+125
°C
(*1): When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
(*2): Mounted on glass epoxy board based on EIA/JEDEC. (114.3x76.2x1.6mm: 2Layers)
(*3): Device itself.
!
Operating voltage
V
IN
=+2.3
∼
+14V (In case of Vo<2.1V version)
!
ELECTRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1µF, Co=1.0µF: Vo≥2.7V (Co=2.2µF : 1.8V<Vo≤2.6V:, Co=4.7µF : Vo≤1.8V), Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Output Voltage
Vo
Io=30mA
-1.0%
-
+1.0%
V
V
CONT
1= V
IN
, V
CONT
2= 0V or
-
150
220
Quiescent Current 1
I
Q1
V
CONT
2= V
IN
, V
CONT
1= 0V
µA
Io=0mA , Except I
CONT
V
CONT
1= V
CONT
2= V
IN
Quiescent Current 2
I
Q2
-
270
400
µA
Io=0mA , Except I
CONT
Quiescent Current
V
CONT
=0V
-
-
100
nA
I
Q(OFF)
at Control OFF
Vo-0.3V
Output Current
Io
100
130
-
mA
-
-
0.10
%/V
Line Regulation
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
Vo+6V, Io=30mA
Load Regulation
-
-
0.03 %/mA
∆Vo/∆Io
Io=0
∼
60mA
Io=60mA
Dropout Voltage(*4)
-
0.1
0.18
V
∆V
I-O
ein=200mVrms, f=1kHz, Io=10mA,
Ripple Rejection
RR
-
75
-
dB
Vo=3V version
Average Temperature
Ta=0
∼
85°C, Io=10mA
-
-
Coefficient of Output
∆Vo/∆Ta
±
50
ppm/°C
Voltage
f=10Hz
∼
80kHz, Io=10mA,
Output Noise Voltage
V
NO
-
45
-
µVrms
Vo=3V version
Control Voltage for
1.6
-
-
V
V
CONT(ON)
ON-state
Control Voltage for
-
-
0.6
V
V
CONT(OFF)
OFF-state
(*4): The output voltage excludes under 2.1V.
(*5): V
IN
=Vo+1V means add 1V to higher output voltage.
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.
Ver.2006-02-20
-3-
NJM2892
!
TEST CIRCUIT
A
I
IN
V
IN
V
OUT
1
1.0µ F
*6
(ceramic)
V
IN
0.1µ F
I
OUT
1
V
V
OUT
1
NJM2892
A
I
CONT
1
CONTROL1
V
OUT
2
1.0µ F
*6
(ceramic)
I
OUT
2
V
OUT
2
V V
CONT
1
V
A
I
CONT
2
CONTROL2
GND
V V
CONT
2
*6
1.8V<Vo
≤
2.6V version : Co=2.2µF(ceramic)
Vo≤1.8V version : Co=4.7µF(ceramic)
!
TYPICAL APPLICATION
1
In the case where ON/OFF Control is not required:
V
IN
V
IN
V
OUT
1
1.0µ F
*7
0.1µ F
R1
(0
∼
300kΩ)
CONTROL1
R2
(0
∼
300kΩ)
CONTROL2
GND
V
OUT
2
1.0µ F
*7
V
OUT
2
V
OUT
1
NJM2892
*7
1.8V<Vo
≤
2.6V version : Co=2.2µF
Vo≤1.8V version : Co=4.7µF
Connect control terminal to V
IN
terminal
-4-
Ver.2006-02-20
NJM2892
2
In use of ON/OFF CONTROL:
V
IN
0.1µ F
V
IN
V
OUT
1
1.0µ F
*7
V
OUT
1
NJM2892
R1
R2
CONTROL1
V
OUT
2
1.0µ F
*7
V
OUT
2
CONTROL2
GND
*7
1.8V<Vo
≤
2.6V version : Co=2.2µF
Vo≤1.8V version : Co=4.7µF
State of control terminal:
•“H”→
output is enabled.
•“L”
or “open”
→
output is disabled.
%In
the case of using a resistance "R" between V
IN
and control.
The current flow into the control terminal while the IC is ON state (I
CONT
) can be reduced when a pull up resistance
"R" is inserted between V
IN
and the control terminal.
The minimum control voltage for ON state (V
CONT (ON)
) is increased due to the voltage drop caused by I
CONT
and the
resistance "R". The I
CONT
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
V
CONT (ON)
over the required temperature range.
Ver.2006-02-20
-5-
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