NJM2894
- 1 -
Ver.2003-03-11
3OUTPUT LOW DROPOUT VOLTAGE REGULATOR
GENRAL DESCRIPTION
PACKAGE OUTLINE
The NJM2894 is a 3ch low dropout voltage regulator
with ON/OFF Control in TVSP-8 package.
It is suitable for camcorder, IC decoder, camera and
other portable items.
NJM2894RB1
FEATURES
High Ripple Rejection
75dB typ. at f=1kHz
Low Noise
45
Vrms typ.
Output capacitor with 1.0
F ceramic capacitor at Vo2.7V
Output Current
Io(max.)=ch1=150mA ,ch2,3=80mA
High Precision Output
1.0%
Low Dropout Voltage
0.1V typ. at Io=60mA
ON/OFF Control
Internal Thermal Overload Protection
Internal Short Circuit Current Limit
Bipolar Technology
Package Outline
TVSP-8
PIN CONFIGURATION
PIN
FUNCTION
1.
V
OUT
1 5.
CONTROL3
2.
V
OUT
2 6.
CONTROL2
3.
V
OUT
3 7.
CONTROL1
NJM2894RB1
4. GND
8. V
IN
EQUIVALENT CIRCUIT
V
OUT
1
V
IN
Thermal
Protection
Bandgap
Reference
CONTROL1
V
OUT
2
CONTROL2
GND
V
OUT
3
CONTROL3
Preliminary
1
2
3
4
8
7
6
5
1
2
3
4
8
7
6
5
NJM2894
- 2 -
Ver.2003-03-11
Preliminary
ABSOLUTE MAXIMUM RATINGS (Ta=25C)
(note1)When input voltage is less than +14V, the absolute maximum control voltage is equal to the input voltage.
ERECRICAL CHARACTERISTICS
(V
IN
=Vo+1V, C
IN
=0.1
F, Co=1.0
F: Vo2.7V (Co=2.2
F: Vo2.6V), Ta=25C)
PARAMETER SYMBOL
TEST
CONDITION
MIN.
TYP.
MAX.
UNIT
Output Voltage
Vo
Io=30mA
-1.0%
-
+1.0%
V
Quiescent Current1
I
Q1
V
CONT
1= V
IN
, V
CONT
2= V
CONT
3= 0V
*1ch ON
Io=0mA, expect Icont
- 140
220
A
Quiescent Current2
I
Q2
V
CONT
1= V
CONT
2= V
IN,
V
CONT
3= 0V
*2ch ON
Io=0mA, expect Icont
- 240
370
A
Quiescent Current3
I
Q3
V
CONT
1= V
CONT
2= V
CONT
3= V
IN
Io=0mA, expect Icont
- 340
520
A
Quiescent Current at
Control OFF
I
Q(OFF)
V
CONT
=0V -
-
100
nA
Output Current 1
Io1
Ch1 : Vo-0.3V
150
200
-
mA
Output Current 2
Io2
Ch2,3 : Vo-0.3V
80
100
-
mA
Line Regulation
Vo/V
IN
V
IN
=Vo+1V to Vo+6V, Io=30mA
-
-
0.10
%/V
Load Regulation 1
Vo/Io1 Ch1
:
Io=0
to
100mA
-
-
0.03 %/mA
Load Regulation 2
Vo/Io2 Ch2,3 : Io=0 to 60mA
-
-
0.03 %/mA
Dropout Voltage 1
V
I
-
O1
Ch1
:
Io=60mA
- 0.10 0.18 V
Dropout Voltage 2
V
I
-
O2
Ch2,3
:
Io=40mA
- 0.10 0.18 V
Ripple Rejection
RR
ein=200mVrms,f=1kHz,Io=10mA,
Vo=3V
- 75 - dB
Average Temperature
Coefficient of Output
Voltage
Vo/Ta
Ta=0 to 85C, Io=10mA
-
50
- ppm/C
Output Noise Voltage
V
NO
f=10Hz to 80kHz, Io=10mA, Vo=3V
-
45
-
Vrms
Control Voltage for
ON-state
V
CONT(ON)
1.6
-
-
V
Control Voltage for
OFF-state
V
CONT(OFF)
-
-
0.6
V
(note2) Please confirm the specification separately because some parameters depend on output voltage.
OUTPUT VOLTAGE RANK LIST
VOUT
Device Name
CH1 CH2 CH3
NJM2893RB1-CCC 2.1V
2.1V
2.1V
NJM2893RB1-LLL 3.0V 3.0V 3.0V
NJM2893RB1-YLC 5.0V 3.0V
2.1V
PARAMETER SYMBOL
RATINGS
UNIT
Input Voltage
V
IN
+14
V
Control Voltage
V
CONT
+14(note1) V
Power Dissipation
P
D
320
mW
Operating Temperature
Topr
-40 to +85
C
Storage Temperature
Tstg
-40 to+125
C
NJM2894
- 4 -
Ver.2003-03-11
Preliminary
TYPICAL APPLICATION
(1) In the case where ON/OFF Control is not required:
NJM2894
V
IN
V
OUT
1
CONTROL
GND
0.1F
1.0F
V
OUT
1
V
IN
R1
(0300k
)
2.2F(Vo
2.6V)
or
CONTROL
1.0F
V
OUT
2
2.2F(Vo
2.6V)
or
R2
(0300k
)
V
OUT
2
CONTROL
1.0F
V
OUT
3
2.2F(Vo
2.6V)
or
R3
(0300k
)
V
OUT
3
Connect control terminal to VIN terminal
In case a resistance "R" is used, the quiescent current will be decreased. However, the but minimum operating
voltage will be increase as well. Please refer to a figure of Output Voltage vs. Control Voltage.
NJM2894
- 5 -
Ver.2003-03-11
(2)In use of ON/OFF Control:
NJM2894
V
IN
V
OUT
1
CONTROL1
GND
0.1F
1.0F
V
OUT
1
V
IN
R2
2.2F(Vo
2.6V)
or
R3
V
OUT
2
1.0F
V
OUT
2
2.2F(Vo
2.6V)
or
CONTROL2
R1
V
OUT
3
1.0F
V
OUT
3
2.2F(Vo
2.6V)
or
CONTROL3
In case the control terminal is "H", the output is enabled.
The control terminal is "L" or "open", the output is disabled.
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