Document
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
6
5 NC
5
4 VIN
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-
NJM12877
OUTPUT VOLTAGE RANK LIST
DFN6-G1(ESON6-G1)
SOT-23-5
Device Name
NJM12877KG1-15 NJM12877KG1-18
Output Voltage
1.5V 1.8V
Device Name
NJM12877F15 NJM12877F18
NJM12877KG1-25 2.5V NJM12877F25
NJM12877KG1-33 3.3V NJM12877F33
NJM12877KG1-05 5.0V NJM12877F05
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
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
-2-
Ver.2015-08-26
NJM12877
ELECTRICAL CHARACTERISTICS
Unless other noted,
VIN = VO + 1V, CIN = 0.1µF, CO =0.1µF :4.4V Vo 5.0V, CO = 0.22µF :2.9V Vo 4.4V, CO = 0.47µF :2.3V Vo 2.9V , CO = 1.0µF :Vo 2.3V Cs=0.01µF, Ta = 25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX. UNIT
Output Voltage
VO
IO=30mA
-1.0%
-
+1.0%
V
Quiescent Current
Quiescent Current at OFF-state
IQ IQ(OFF)
IO = 0mA, except ICONT VCONT = 0V
-
160
210
μA
-
-
10
μA
Output Current
IO
VO 0.9
200
-
-
mA
Line Regulation Load Regulation
VO/ VIN VO/ IO
VIN = VO + 1V ~ 6.5V, Io=30mA
Vo=1.5V
Vo=1.8V
IO = 0 ~ 200mA
Vo=2.5V Vo=3.3V
Vo=5.0V
-
-
0.1
%/V
-
-
0.018
-
0.016
-
0.014 %/mA
-
0.012
-
0.010
Dropout Voltage (*5) Average Temperature Coefficient of Output Voltage
Ripple Rejection
Output Noise Voltage
VIO VO/ Ta RR
VNO
IO = 100mA
Ta = -40 +125 C, IO=30mA
ein=200mVrms, f=1kHz, Io=10mA
f=10Hz ~ 80kHz, Io=10mA
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
-
0.12
0.2
V
-
50
-
ppm/ C
-
70
-
-
69
-
-
66
-
dB
-
64
-
-
60
-
-
19
-
-
24
-
-
29
-
μVrms
-
33
-
-
42
-
Control Current
Control Voltage at ON-state Control Voltage at OFF-state
ICONT VCONT(ON)
VCONT =1.6V
VCONT(OFF)
-
3
1.6
-
12
μA
-
V
-
-
0.6
V
Soft Start Time
tS(ON)
VCONT=L→H, Io=30mA, Cs=0.022μF
-
1.2
-
msec
Discharge Current at OFF-state
VIN=2.3V, VCONT=0V, VO =0.5V IDIS
VIN=6.5V, VCONT=0V, VO =0.5V
2
9
15
25
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.2015-08-26
-3-
NJM12877
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)
(Fo.