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.
FEATURES
Operating Voltage Range 2.3V to 6.5V
Output Voltage Accuracy
V
O
1.0%
Output Current
I
O
(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)
■
PACKAGE OUTLINE
NJM12877KG1
NJM12877F
Cs
1
GND
2
CONTROL
3
6
V
OUT
5
NC
4
V
IN
6
5
4
1
2
3
Exposed PAD on backside
connected to GND.
V
IN
1
GND 2
CONTROL 3
NJM12877F
5 V
OUT
4 Cs
NJM12877KG1
BLOCK DIAGRAM
V
IN
CONTROL
V
OUT
Reverse
Current
Protection
Thermal
Protection
Bandgap
Reference
Over Current
Protection
C
S
GND
Ver.2015-08-26
-1-
NJM12877
OUTPUT VOLTAGE RANK LIST
DFN6-G1(ESON6-G1)
SOT-23-5
Output
Device Name
Device Name
Voltage
NJM12877KG1-15
1.5V
NJM12877F15
NJM12877KG1-18
1.8V
NJM12877F18
NJM12877KG1-25
2.5V
NJM12877F25
NJM12877KG1-33
3.3V
NJM12877F33
NJM12877KG1-05
5.0V
NJM12877F05
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
Control Pin Voltage
V
CONT
Output Voltage
Soft start Pin Voltage
Power Dissipation
Junction Temperature Range
Operating Temperature Range
Storage Temperature Range
Output
Voltage
1.5V
1.8V
2.5V
3.3V
5.0V
(Ta=25 C)
MAXIMUM RATING
UNIT
V
OUT
V
CS
P
D
Tj
Topr
Tstg
-0.3 ~ +7
-0.3 ~ +7
-0.3 ~ +5.5
Vo 1.8V
-0.3 ~ +7
Vo 1.8V
-0.3 ~ +4
420(*1)
ESON6-G1
1200(*2)
480(*3)
SOT-23-5
650(*4)
-40 +150
-40 +125
-50 +150
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
：
V
IN
=2.3V ~ 6.5V
-2-
Ver.2015-08-26
NJM12877
ELECTRICAL CHARACTERISTICS
Unless other noted,
V
IN
= V
O
+ 1V, C
IN
= 0.1µF, C
O
=0.1µF :4.4V Vo 5.0V, C
O
= 0.22µF :2.9V Vo 4.4V, C
O
= 0.47µF :2.3V Vo 2.9V , C
O
= 1.0µF :Vo 2.3V Cs=0.01µF, T
a
= 25°C)
PARAMETER
Output Voltage
Quiescent Current
Quiescent Current
at OFF-state
Output Current
Line Regulation
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
V
O
I
Q
I
Q(OFF)
I
O
V
O
/ V
IN
I
O
=30mA
I
O
= 0mA,
except I
CONT
V
CONT
= 0V
V
O
0.9
V
IN
= V
O
+ 1V ~ 6.5V, Io=30mA
Vo=1.5V
Vo=1.8V
I
O
= 0 ~ 200mA
Vo=2.5V
Vo=3.3V
Vo=5.0V
I
O
= 100mA
Ta = -40 +125 C, I
O
=30mA
ein=200mVrms,
f=1kHz, Io=10mA
-1.0%
-
-
200
-
-
-
160
-
-
-
-
-
-
-
-
0.12
50
70
69
66
64
60
19
24
29
33
42
3
-
-
1.2
9
25
+1.0%
210
10
-
0.1
0.018
0.016
0.014
0.012
0.010
0.2
-
-
-
-
-
-
-
-
-
-
-
12
-
0.6
-
-
-
V
μA
μA
mA
%/V
Load Regulation
V
O
/ I
O
%/mA
Dropout Voltage
(*5)
Average Temperature
Coefficient of Output Voltage
V
IO
V
O
/ Ta
-
-
-
-
-
-
-
-
-
-
-
-
-
1.6
-
V
ppm/ C
Ripple Rejection
RR
Output Noise Voltage
V
NO
f=10Hz ~ 80kHz,
Io=10mA
V
CONT
=1.6V
Vo=1.5V
Vo=1.8V
Vo=2.5V
Vo=3.3V
Vo=5.0V
Vo=1.5V
Vo=1.8V
Vo=2.5V
Vo=3.3V
Vo=5.0V
dB
μVrms
Control Current
Control Voltage at
ON-state
Control Voltage at
OFF-state
Soft Start Time
Discharge Current
at OFF-state
I
CONT
V
CONT(ON)
V
CONT(OFF)
t
S(ON)
I
DIS
μA
V
V
msec
mA
V
CONT
=L→H, Io=30mA, Cs=0.022μF
-
2
15
V
IN
=2.3V, V
CONT
=0V, V
O
=0.5V
V
IN
=6.5V, V
CONT
=0V, V
O
=0.5V
(*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.2015-08-26
-3-
NJM12877
THERMAL CHARACTERISTICS
PARAMETER
SYMBOL
Junction-to-ambient
thermal resistance
Junction-to-Top of package
characterization parameter
ja
VALUE
DFN6-G1
298 (*6)
(ESON6-G1)
104 (*7)
260 (*8)
SOT-23-5
192 (*9)
DFN6-G1
52 (*6)
(ESON6-G1)
26 (*7)
70 (*8)
SOT-23-5
60 (*9)
UNIT
C/W
jt
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
NJM12877KG1 Power Dissipation
NJM12888KG1 PowerDissipation
(Topr=-40~+125°C,Tj=150°C)
(Topr= -40~+125°C, Tj=150°C)
2000
Power Dissipation P
D
(mW)
1600
on 4 layers board
1200
800
on 2 layers board
400
0
-50
-25
0
25
50
75
100
125
150
Temperature : Ta(°C)
NJM12877F PowerDissipation
(Topr=-40~+125°C,Tj=150°C)
800
Power Dissipation P
D
(mW)
700
600
500
400
300
200
100
0
-50
on 4 layers board
on 2 layers board
-25
0
25
50
75
100
125
150
Temperature : Ta(°C)
-4-
Ver.2015-08-26
NJM12877
TEST CIRCUIT
I
IN
A
V
IN
V
IN
V
OUT
0.1
μ
F
(ceramic)
NJM12877
(*10)
0.1
μ
F
(ceramic)
I
OUT
V
V
OUT
A
V
V
CONT
I
CONT
CONTROL
GND
Cs
0.01
μ
F
(ceramic)
*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
V
IN
0.1 F
V
IN
V
OUT
(*11)
0.1 F
V
OUT
NJM12877
CONTROL
GND
*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
Cs
0.01 F
*Connected when soft
start is Required.
Connect CONTROL pin to V
IN
pin
2. In use of ON/OFF CONTROL
V
IN
V
IN
V
OUT
V
OUT
(*12)
0.1 F
0.1 F
NJM12877
CONTROL
GND
Cs
0.01 F
*Connected when soft
start is Required.
*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
Ver.2015-08-26
-5-
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