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PDF NJM12888 Data sheet ( Hoja de datos )

Número de pieza NJM12888
Descripción LDO
Fabricantes New Japan Radio 
Logotipo New Japan Radio Logotipo



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No Preview Available ! NJM12888 Hoja de datos, Descripción, Manual

NJM12888
LDO with Reverse Current Protection / Soft Start / Discharge Function
GENERAL DESCRIPTION
The NJM12888 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
NJM12888KG1
NJM12888F
FEATURES
Operating Voltage Range 2.3V to 6.5V
Output Voltage Accuracy VO 1.0%
Output Current
IO(min.)=300mA
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
NJM12888KG1
1 VIN 1
2 GND 2
3 CONTROL 3
5 VOUT
4 Cs
Exposed PAD on backside
connected to GND.
NJM12888F
BLOCK DIAGRAM
VIN
CONTROL
Reverse
Current
Protection
Bandgap
Reference
Thermal
Protection
Over Current
Protection
VOUT
CS
GND
Ver.2015-08-19
-1-

1 page




NJM12888 pdf
NJM12888
TEST CIRCUIT
A IIN
VIN VOUT
VIN
0.1μF
NJM12888
(ceramic)
A ICONT CONTROL
V VCONT
GND
Cs
(*10)
0.47μF
(ceramic)
IOUT V VOUT
0.01μF
(ceramic)
*10: 1.8V<Vo 2.6V version: Co=1.0 F(Ceramic)
Vo 1.8V version:
Co=2.2 F(Ceramic)
TYPICAL APPLICATION
1. In the case where ON/OFF Control is not required
VIN VIN
0.1μF
VOUT
(*11)
0.47μF
VOUT
NJM12888
CONTROL
*11: 1.8V<Vo 2.6V version: Co=1.0 F
Vo 1.8V version:
Co=2.2 F
GND
Cs
Connect CONTROL Pin to VIN Pin
2. In use of ON/OFF CONTROL
VIN
VIN VOUT
0.1μF
NJM12888
CONTROL
GND
Cs
*12: 1.8V<Vo 2.6V version:Co=1.0 F
Vo 1.8V version:
Co=2.2 F
State of CONTROL Pin:
“H” output is enabled.
“L” or “open” output is disabled
Ver.2015-08-19
*Connected when soft start
is Required.
VOUT
(*12)
0.47μF
*Connected when soft
start is Required.
-5-

5 Page





NJM12888 arduino
NJM12888
100
NJM12888_3.3V
Output Noise Voltage vs Output Current
90 @Ta=25ºC
80
VIN=4.3V
CIN=0.1µF(Ceramic)
Co=0.47µF(Ceramic)
70 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
NJM12888_3.3V
Ripple Rejection vs Frequency
Io=0mA
Io=30mA
Io=300mA
Io=10mA
Io=100mA
70
60
50
40 @:Ta=25ºC
VIN=4.3V
30
Co=0.47μF
Cs=0.01μF
ein=200mVrms
20
0.01 0.1
1
10
Frequency :f (kHz)
100
1000
NJM12888_3.3V
Output Voltage vs Temperature
3.4
3.38
3.36
3.34
@CINV=IN0=.14µ.3FV(Ceramic)
Co=0.47µF(Ceramic)
Cs=0.01µF(Ceramic)
3.32
3.3
3.28
3.26
3.24
3.22
3.2
-50 -25
Io=0mA
Io=30mA
Io=300mA
0 25 50 75 100 125 150
Temperature : (ºC)
Ver.2015-08-19
100
NJM12888_3.3V
Equivalent Serise Resistance vs Output Current
@:CIN=0.1μF(Ceramic)
Co=0.47μF(Ceramic)
10
1 STABLE REGION
0.1
0.01
0.001
0.01 0.1 1
10 100
Output Current : Io (mA)
1000
100
90
80
NJM12888_3.3V
Ripple Rejection vs Output Current
f=1kHz
f=10kHz
70
60
50
40
@:Ta=25ºC
VIN=4.3V
ein=200mVrms
30
CIN=0.1μF(Ceramic)
Co=0.47μF(Ceramic)
Cs=0.01μF(Ceramic)
20
0.01 0.1
1
10 100
Output Current :Io (mA)
1000
0.3
0.25
NJM12888_3.3V
Dropout Voltage vs Temperature
@CoC=IN0=.407.1µµFF(C(Ceerarammicic) )
Cs=0.01µF(Ceramic)
0.2
0.15
0.1
0.05
0
-50 -25
Io=30mA
Io=100mA
Io=300mA
0 25 50 75 100 125 150
Temperature : (ºC)
- 11 -

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