NJM2835
LOW DROPOUT VOLTAGE REGULATOR
GENERAL DESCRIPTION
The NJM2835 is a 500mA output low dropout voltage
regulator.
Advanced Bipolar technology achieves low noise, high
ripple rejection and high supply voltage.
2.1V to 15.5V output voltage range, 2.2µF small
decoupling capacitor, built-in noise bypass capacitor make
the NJM2835 suitable for various applications.
FEATURES
Output voltage options available 2.1
∼
15.5V
High Ripple Rejection
75dB typ. (f=1kHz,Vo=3V Version)
Output Noise Voltage
Vno=45µVrms typ.
Output capacitor with 2.2µF ceramic capacitor (Vo≥5.1V)
Output Current
Io(max.)=500mA
High Precision Output
Vo±1.0%
Low Dropout Voltage
0.18V typ. (Io=300mA)
Internal Thermal Overload Protection
Internal Over Current Protection
Bipolar Technology
Package Outline
TO-252-3
PIN CONFIGURATION
2
PACKAGE OUTLINE
NJM2835DL1
PIN FUNCTION
1.V
IN
2.GND
3.V
OUT
3
1
NJM2835DL1
EQUIVALENT CIRCUIT
V
IN
Thermal
Protection
Bandgap
Reference
V
OUT
GND
NJM2835
OUTPUT VOLTAGE RANK LIST
The WHITE column shows applicable Voltage Rank(s)
Device Name
NJM2835DL1-21
NJM2835DL1-22
NJM2835DL1-23
NJM2835DL1-24
NJM2835DL1-25
NJM2835DL1-26
NJM2835DL1-27
NJM2835DL1-28
NJM2835DL1-29
NJM2835DL1-03
NJM2835DL1-31
NJM2835DL1-32
NJM2835DL1-33
NJM2835DL1-34
NJM2835DL1-35
Vout
2.1V
2.2V
2.3V
2.4V
2.5V
2.6V
2.7V
2.8V
2.9V
3.0V
3.1V
3.2V
3.3V
3.4V
3.5V
Device Name
NJM2835DL1-36
NJM2835DL1-37
NJM2835DL1-38
NJM2835DL1-39
NJM2835DL1-04
NJM2835DL1-41
NJM2835DL1-42
NJM2835DL1-43
NJM2835DL1-44
NJM2835DL1-45
NJM2835DL1-46
NJM2835DL1-47
NJM2835DL1-48
NJM2835DL1-49
NJM2835DL1-05
Vout
3.6V
3.7V
3.8V
3.9V
4.0V
4.1V
4.2V
4.3V
4.4V
4.5V
4.6V
4.7V
4.8V
4.9V
5.0V
Device Name
NJM2835DL1-08
NJM2835DL1-85
NJM2835DL1-09
NJM2835DL1-10
NJM2835DL1-12
NJM2835DL1-15
Vout
8.0V
8.5V
9.0V
10.0V
12.0V
15.0V
NJM2835
RATINGS
+20
1190(*1)
Power Dissipation
P
D
mW
3125(*2)
Operating Temperature
Topr
-40
∼
+85
°C
Storage Temperature
Tstg
-40
∼
+150
°C
(*1):
Mounted on glass epoxy board. (76.2×114.3×1.6mm:EIA/JDEC standard size, 2Layers, copper area 100mm
2
)
(*2):
Mounted on glass epoxy board. (76.2×114.3×1.6mm:EIA/JDEC standard size, 4Layers)
(4Layers inner foil: 74.2 x 74.2mm applying a thermal via hall to a board based on JEDEC standard JESD51-5)
ELECTRICAL CHARACTERISTICS
(V
IN=
Vo+1V, C
IN
=0.33µF, Co=2.2µF (2.9V<Vo≤5V:Co=4.7µF,Vo≤2.9V:Co=10µF),Ta=25°C)
PARAMETER
SYMBOL
TEST CONDITION
MIN
TYP
Output Voltage
Vo
Io=30mA
-1.0%
-
-
200
Vo≤5V Version
5V<Vo≤10V
-
215
Quiescent Current
I
Q
Io=0mA
Version
10V<Vo≤15V
-
230
Version
Output Current
Io
Vo-0.3V
500
650
V
IN
=Vo+1V
∼
Vo+6V(Vo≤12V),
-
-
Line Regulation
∆Vo/∆V
IN
V
IN
=Vo+1V
∼
18V(Vo>12V),
Io=30mA
Load Regulation
-
-
∆Vo/∆Io
Io=0
∼
500mA
Io=300mA
-
0.18
Dropout Voltage(*1)
∆V
I-O
ein=200mVrms,f=1kHz,Io=10mA
Ripple Rejection
RR
-
75
Vo=3V Version
Average Temperature
Coefficient of Output
-
∆Vo/∆Ta
Ta=0
∼
85°C, Io=10mA
±
50
Voltage
f=10Hz
∼
80kHz, Io=10mA,
Output Noise Voltage
V
NO
-
45
Vo=3V Version
Input Voltage
V
IN
-
-
(*1): 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.
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
Input Voltage
V
IN
(Ta=25°C)
UNIT
V
MAX UNIT
+1.0%
V
300
µA
315
330
-
0.10
µA
µA
mA
%/V
0.007 %/mA
0.28
V
-
-
-
18
dB
ppm/°C
µVrms
V
NJM2835
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJM2835DL1 PowerDissipation
(Topr=-40~+85°C,Tj=150°C)
3500
Power Dissipation P
D
(mW)
3000
2500
2000
1500
1000
500
0
-50
on 4 layers board
on 2 layers board
-25
0
25
50
75
100
Temperature : Ta(°C)
TEST CIRCUIT
A
V
IN
*2
I
IN
V
IN
V
OUT
NJM2835
2.2
µ
F*2
0.33
µ
F
I
OUT
V
V
OUT
GND
(ceramic)
2.9<Vo
≤
5.0V version : Co=4.7µF(ceramic)
Vo
≤
2.9V version : Co=10µF(ceramic)
TYPICAL APPLICATION
V
IN
0.33
µ
F
V
IN
V
OUT
V
OUT
2.2
µ
F*3
NJM2835
GND
*3
2.9<Vo
≤
5.0V version : Co=4.7µF
Vo
≤
2.9V version : Co=10µF
NJM2835
Input Capacitance C
IN
Input Capacitance C
IN
is required to prevent oscillation and reduce power supply ripple for applications
with high power supply impedance or a long power supply line.
Use the C
IN
value of 0.33µF greater to avoid the problem.
C
IN
should connect between GND and V
IN
as short as possible.
Output Capacitance C
O
Output capacitor (C
O
) will be required for a phase compensation of the internal error amplifier.
The capacitance and the equivalent series resistance (ESR) influence to stable operation of the
regulator.
This product is designed to work with a low ESR capacitor (C
O
). However use of recommended
capacitance or larger value is effective for stable operation.
Use of a smaller C
O
may cause excess output noise or oscillation of the regulator due to lack of the
phase compensation.
Therefore use C
O
with the recommended capacitance or larger value and connect between Vo
terminal and GND terminal with shortest path. The recommended capacitance depends on the output
voltage rank. Low voltage regulator requires larger value C
O
. Thus, check the recommended
capacitance for each output voltage rank.
In addition, You should consider varied characteristics of capacitor (a frequency characteristic, a
temperature characteristic, a DC bias characteristic and so on) and unevenness peculiar to a capacitor
supplier enough .We recommend that withstand voltage margin against output voltage and superior in a
temperature characteristic, when selecting Output capacitor.
Uses of a larger C
O
reduces output noise and ripple output, and also improves output transient
response against rapid load change.
嵌入式系统
