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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-

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NJM12888
OUTPUT VOLTAGE RANK LIST
DFN6-G1(ESON6-G1),
SOT-23-5
Device Name
NJM12888KG1-15
NJM12888KG1-18
NJM12888KG1-25
Output
Voltage
1.5V
1.8V
2.5V
Device Name
NJM12888F15
NJM12888F18
NJM12888F25
NJM12888KG1-33 3.3V NJM12888F33
NJM12888KG1-05 5.0V NJM12888F05
Output
Voltage
1.5V
1.8V
2.5V
3.3V
5.0V
ABSOLUTE MAXIMUM RATINGS
(Ta=25 C)
PARAMETER
Input Voltage
Control Pin Voltage
Output Voltage
Soft start Pin Voltage
Power Dissipation
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
SYMBOL
VIN
VCONT
VOUT
VCS
PD
Tj
Topr
Tstg
MAXIMUM RATING
-0.3 ~ +7
-0.3 ~ +7
Vo 1.8V -0.3 ~ +5.5
Vo 1.8V
-0.3 ~ +7
-0.3 ~ +4
DFN6-G1
(ESON6-G1)
420(*1)
1200(*2)
SOT-23-5
480(*3)
650(*4)
-40 +150
-40 +125
-50 +150
UNIT
V
V
V
V
V
mW
C
C
C
(*1): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 2Layers FR-4, with Exposed Pad)
(*2): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 4Layers FR-4, with Exposed Pad)
(For 4Layers: Applying 99.5×99.5mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5)
(*3): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
(*4): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers), internal Cu area: 74.2x74.2mm
Operating Voltage Range VIN=2.3V ~ 6.5V
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Ver.2015-08-19

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NJM12888
ELECTRICAL CHARACTERISTICS
Unless other noted, VIN = VO + 1V, CIN = 0.1µF, CO =0.47µF(Co=1.0µF :1.8V Vo 2.6V, Co=2.2µF :Vo 1.8V), Cs=0.01µF, Ta = 25°C
PARAMETER
SYMBOL
TEST CONDITION
MIN. TYP. MAX. UNIT
Output Voltage
Quiescent Current
Quiescent Current
at OFF-state
VO
IQ
IQ(OFF)
IO=30mA
IO = 0mA, except ICONT
VCONT = 0V
-1.0%
-
-
-
150
-
+1.0%
200
10
V
μA
μA
Output Current
Line Regulation
Load Regulation
Dropout Voltage (*5)
Average Temperature
Coefficient of Output Voltage
IO
VO/ VIN
VO/ IO
VIO
VO/ Ta
VO 0.9
VIN = VO + 1V ~ 6.5V, Io=30mA
IO = 0 ~ 300mA
IO=100mA
Ta= -40 +125 C, IO=30mA
300 -
- mA
- - 0.10 %/V
- - 0.006 %/mA
- 0.10 0.18 V
- 50 - ppm/ C
Vo=1.5V
- 71
-
Ripple Rejection
RR
ein=200mVrms,
f=1kHz, Io=10mA
Vo=1.8V
Vo=2.5V
Vo=3.3V
- 70
-
- 69 - dB
- 66
-
Vo=5.0V
- 63
-
Vo=1.5V
- 19
-
Output Noise Voltage
VNO
f=10Hz ~ 80kHz,
Io=10mA
Vo=1.8V
Vo=2.5V
Vo=3.3V
- 23
- 28
- 32
-
- μVrms
-
Vo=5.0V
- 42
-
Control Current
Control Voltage at
ON-state
ICONT
VCONT(ON)
VCONT =1.6V
-3
1.6 -
12 μA
-V
Control Voltage at
OFF-state
VCONT(OFF)
- - 0.6 V
Soft Start Time
Discharge Current
at OFF-state
tS(ON)
IDIS
VCONT=LH, Io=30mA, Cs=0.022μF
VIN=2.3V, VCONT=0V, VO =0.5V
VIN=6.5V, VCONT=0V, VO =0.5V
-
2
15
1.2
9
25
- msec
-
-
mA
(*5): Except Output Voltage Rank less than 2.1V
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.2015-08-19
-3-

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NJM12888
THERMAL CHARACTERISTICS
PARAMETER
SYMBOL
VALUE
UNIT
Junction-to-ambient
thermal resistance
Junction-to-Top of package
characterization parameter
DFN6-G1
298 (*6)
ja
(ESON6-G1)
SOT-23-5
104 (*7)
260 (*8)
192 (*9)
C/W
DFN6-G1
52 (*6)
jt
(ESON6-G1)
SOT-23-5
26 (*7)
70 (*8)
60 (*9)
C/W
(*6): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 2Layers FR-4, with Exposed Pad)
(*7): Mounted on glass epoxy board. (101.5×114.5×1.6mm: based on EIA/JEDEC standard, 4Layers FR-4, with Exposed Pad)
(For 4Layers: Applying 99.5×99.5mm inner Cu area and a thermal via hole to a board based on JEDEC standard JESD51-5)
(*8): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 2Layers)
(*9): Mounted on glass epoxy board. (76.2×114.3×1.6mm:based on EIA/JDEC standard, 4Layers), internal Cu area: 74.2x74.2mm
POWER DISSIPATION vs. AMBIENT TEMPERATURE
2000
NJM12888KG1 PowerDissipation
(Topr=-40~+125°C,Tj=150°C)
1600
1200
on 4 layers board
800
on 2 layers board
400
0
-50
-25
0 25 50 75
Temperature : Ta(°C)
100 125 150
NJM12888F PowerDissipation
(Topr=-40~+125°C,Tj=150°C)
800
700 on 4 layers board
600
500
400 on 2 layers board
300
200
100
0
-50
-25
0 25 50 75
Temperature : Ta(°C)
100 125 150
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Ver.2015-08-19

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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.
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