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PDF NJM12877 Data sheet ( Hoja de datos )
| Número de pieza | NJM12877 | |
| Descripción | LDO | |
| Fabricantes | New Japan Radio | |
| Logotipo |  |
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NJM12877
LDO with Reverse Current Protection / Soft Start / Discharge Function
GENERAL DESCRIPTION
The NJM12877 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
NJM12877KG1
NJM12877F
FEATURES
Operating Voltage Range 2.3V to 6.5V
Output Voltage Accuracy VO 1.0%
Output Current
IO(min.)=200mA
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
DFN6-G1(ESON6-G1), SOT-23-5
PIN CONFIGRATION
(Top View)
(Bottom View)
Cs 1
GND 2
CONTROL 3
6 VOUT
5 NC
4 VIN
6
5
4
NJM12877KG1
1
2
3
Exposed PAD on backside
connected to GND.
VIN 1
GND 2
CONTROL 3
5 VOUT
4 Cs
NJM12877F
BLOCK DIAGRAM
VIN
CONTROL
Reverse
Current
Protection
Bandgap
Reference
Thermal
Protection
Over Current
Protection
VOUT
CS
GND
Ver.2015-08-26
-1-
1 page  
TEST CIRCUIT
A IIN
VIN VOUT
VIN
0.1μF
NJM12877
(ceramic)
A ICONT CONTROL
V VCONT
GND
Cs
*10: 2.9V<Vo 4.4V version :Co=0.22 F(Ceramic)
2.3V<Vo 2.9V version :Co=0.47 F(Ceramic)
Vo 2.3V version
:Co=1.0 F(Ceramic)
TYPICAL APPLICATION
1. In the case where ON/OFF Control is not required
VIN VIN VOUT
0.1 F
NJM12877
NJM12877
(*10)
0.1μF
(ceramic)
IOUT V VOUT
0.01μF
(ceramic)
(*11)
0.1 F
VOUT
CONTROL
*11: 2.9V<Vo 4.4V version :Co=0.22 F
2.3V<Vo 2.9V version :Co=0.47 F
Vo 2.3V version
:Co=1.0 F
Connect CONTROL pin to VIN pin
GND
Cs
2. In use of ON/OFF CONTROL
VIN
VIN VOUT
0.1 F
NJM12877
CONTROL
GND
Cs
*12: 2.9V<Vo 4.4V version :Co=0.22 F
2.3V<Vo 2.9V version :Co=0.47 F
Vo 2.3Vversion
:Co=1.0 F
State of CONTROL pin:
“H” → output is enabled.
“L” or “open” → output is disabled
0.01 F
*Connected when soft
start is Required.
(*12)
0.1 F
VOUT
0.01 F
*Connected when soft
start is Required.
Ver.2015-08-26
-5-
5 Page 
NJM12877
100
90
80
70
NJM12877_3.3V
Output Noise Voltage vs Output Current
@Ta=25ºC
VIN=4.3V
CIN=0.1µF(Ceramic)
Co=0.22µF(Ceramic)
Cs=0.01µF(Ceramic)
60
50
40
30
20
10
0
0.001
0.01 0.1 1
10 100
Output Current :Io (mA)
1000
100
90
80
NJM12877_3.3V
Ripple Rejection vs Frequency
Io=0mA
Io=30mA
Io=10mA
Io=200mA
70
60
50
40
30
@:Ta=25ºC
20
VIN=4.3V
Co=0.22μF
10
Cs=0.01μF
ein=200mVrms
0
0.01
0.1 1 10
Frequency :f (kHz)
100
1000
3.4
3.38
3.36
NJM12877_3.3V
Output Voltage vs Temperature
@VIN=4.3V
CIN=0.1µF(Ceramic)
Co=0.22µF(Ceramic)
Cs=0.01µF(Ceramic)
3.34
3.32
3.3
3.28
3.26
3.24
3.22
3.2
-50 -25
Io=0mA
Io=30mA
Io=200mA
0 25 50 75 100 125 150
Temperature : (ºC)
Ver.2015-08-26
100
10
NJM12877_3.3V
Equivalent Serise Resistance vs Output Current
@CoC=IN0=.202.1µµFF(C(Ceerraammicic))
Cs=0.01µF(Ceramic)
1 STABLE REGION
0.1
0.01
0.001
0.01 0.1 1 10 100
Output Current : Io (mA)
1000
100
90
80
NJM12877_3.3V
Ripple Rejection vs Output Current
f=1kHz
f=10kHz
70
60
50
40 @:Ta=25ºC
VIN=4.3V
30
Co=0.22μF
Cs=0.01μF
ein=200mVrms
20
0.01 0.1 1 10 100
Output Current :Io (mA)
1000
0.4
0.35
0.3
NJM12877_3.3V
Dropout Voltage vs Temperature
@CIN=0.1µF(Ceramic)
Co=0.22µF(Ceramic)
Cs=0.01µF(Ceramic)
0.25
0.2
0.15
0.1
0.05
0
-50 -25
Io=30mA
Io=100mA
Io=200mA
0 25 50 75 100 125 150
Temperature : (ºC)
- 11 -
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet NJM12877.PDF ] | |
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