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PDF NJM12856 Data sheet ( Hoja de datos )
| Número de pieza | NJM12856 | |
| Descripción | LDO | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJM12856
LDO with Reverse Current Protection / Soft Start / Discharge Function
GENERAL DESCRIPTION
The NJM12856 is a low dropout regulator which achieves
high ripple rejection, low noise and high speed response with
the bipolar technology.
Adjustable soft-start function is useful for reducing inrush
current and controlling power-on sequence. Moreover the
discharge function makes effective sequence control with the
soft-start function.
In addition, the reverse current protection makes external
SBD unnecessary.
■ PACKAGE OUTLINE
NJM12856U2
NJM12856DL3
FEATURE
Operating Voltage Range 2.5V ~ 6.5V
Output Voltage Accuracy VO 1.0%
Output Current
IO(min.)=1000mA
Reverse Current Protection
Adjustable soft-start Function
Discharge Function
ON/OFF Control
Correspond to Low ESR capacitor (MLCC)
Thermal Shutdown Circuit
Over Current Protection Circuit
Package Outline
SOT-89-5, TO-252-5
PIN CONFIGRATION
VOUT 1
GND 2
CS 3
5 VIN
2 GND
4 CONTROL
NJM12856U2
5 CS
4 VOUT
3 3 GND
2 VIN
1 CONTROL
NJM12856DL3
BLOCK DIAGRAM
VIN
CONTROL
Reverse
Current
Protection
Bandgap
Reference
Thermal
Protection
Over Current
Protection
VOUT
CS
GND
Ver.2015-07-21
-1-
1 page  
TYPICAL APPLICATION
1. In the case where ON/OFF Control is not required
VIN VIN VOUT
0.33μF
NJM12856
NJM12856
(*5)
0.47μF
VOUT
CONTROL
GND
Cs
*5: 2.4V<Vo 2.9V version: Co=1.0 F
1.7V<Vo 2.4V version: Co=2.2 F
Vo 1.7V version: Co=4.7 F
Connect CONTROL Pin to VIN Pin
2. In use of ON/OFF CONTROL
VIN VIN
VOUT
0.33μF
NJM12856
CONTROL
GND
Cs
*6: 2.4V<Vo 2.9V version: Co=1.0 F
1.7V<Vo 2.4V version: Co=2.2 F
Vo 1.7V version: Co=4.7 F
State of CONTROL Pin:
“H” → output is enabled.
“L” or “open” → output is disabled
*Connected when soft start
is Required.
VOUT
(*6)
0.47μF
*Connected when soft start
is Required.
Ver.2015-07-21
-5-
5 Page 
NJM12856
NJM12856_3.3V
Control Voltage vs Temperature
2
1.8
@:VIN=4.3V
CIN=0.33µF(Ceramic)
Co=1.0µF(Ceramic)
1.6 Cs=0.01µF(Ceramic)
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-50 -25
0 25 50 75 100 125 150
Temperature: (ºC)
600
500
400
NJM12856_3.3V
Quiesent Current vs Temperature
@:VIN=4.3V
Output is Open
except ICONT
CIN=0.33µF(Ceramic)
Co=1.0µF(Ceramic)
Cs=0.01µF(Ceramic)
300
200
100
0
-50 -25
0 25 50 75 100 125 150
Temperature: (ºC)
0.3
0.25
0.2
0.15
NJM12856_3.3V
Line Regulation vs Temperature
@:VIN=4.3-6.5V
Io=200mA
CIN=0.33µF(Ceramic)
Co=1.0µF(Ceramic)
Cs=0.01µF(Ceramic)
0.1
0.05
0
-0.05
-0.1
-50 -25
0 25 50 75 100 125 150
Temperature: (ºC)
Ver.2015-07-21
NJM12856_3.3V
Control Current vs Temperature
12
@:VCONT=1.6V
10
CIN=0.33µF(Ceramic)
Co=1.0µF(Ceramic)
Cs=0.01µF(Ceramic)
8
6
4
2
0
-50 -25
0 25 50 75 100 125 150
Temperature: (ºC)
NJM12856_3.3V
Discharge Current vs Temperature
40
35
@:VCONT=0V
VO=0.5V
CIN=0.33µF(Ceramic)
30
Co=1.0µF(Ceramic)
Cs=0.01µF(Ceramic)
25
VIN=6.5V
20
15
VIN=2.5V
10
5
0
-50 -25
0 25 50 75 100 125 150
Temperature: (ºC)
0.010
0.009
0.008
0.007
NJM12856_3.3V
Load Regulation vs Temperature
@:VIN=4.3V
Io=0-1000mA
CIN=0.33µF(Ceramic)
Co=1.0µF(Ceramic)
Cs=0.01µF(Ceramic)
0.006
0.005
0.004
0.003
0.002
0.001
0.000
-50 -25
0 25 50 75 100 125 150
Temperature: Ta (ºC)
- 11 -
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet NJM12856.PDF ] | |
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