NJW4185
High Voltage Io=500mA Low Dropout Regulator
GENERAL DESCRIPTION
The NJW4185 is a high voltage and low current consumption
low dropout
regulator.
NJW4185 is mounted to TO-252-5 package and corresponded
to Low ESR capacitor (MLCC).
The wide input range makes NJW4185 suitable for a Car accessory,
Industrial supplies, battery equipment and various applications.
PACKAGE OUTLINE
NJW4185DL3
FEATURES
Wide Operating Voltage Range
Low Current Consumption
Correspond to Low ESR capacitor (MLCC)
Output Current
Output Voltage Range
High Precision Output
ON/OFF Function
Internal Thermal Overload Protection
Internal Over Current Protection
Package Outline
PIN CONFIGURATION
3
4.0V ~ 40V
55µA(typ.)
I
O
(min.)=500mA
2.0V to 15.0V
V
O
±1.0%
TO-252-5
12 3 4 5
PIN FUNCTION
1. V
IN
2. CONTROL
3. GND
4. N.C.
5. V
OUT
NJW4185DL3
BLOCK DIAGRAM
V
IN
Current
Limit
V
OUT
CONTROL
Bandgap
Reference
Thermal
Protection
GND
Ver.2013-04-17
-1-
NJW4185
ELECTRICAL CHARACTERISTICS
Unless otherwise noted, V
O
≥3.0V:
V
IN
=V
O
+1V, C
IN
=1.0µF, C
O
=2.2µF, Ta=25°C
V
O
<3.0V: V
IN
=4.0V, C
IN
=1.0µF,Co=4.7µF, Ta=25°C
PARAMETER
SYMBOL
TEST CONDITION
MIN.
TYP.
MAX.
UNIT
Output Voltage
V
O
I
O
=30mA
-1.0%
-
+1.0%
V
Quiescent Current
I
Q
I
O
=0mA, except I
CONT
-
55
90
µA
Quiescent Current
at Control OFF
Output Current
I
Q (OFF)
V
CONT
=0V
-
-
1
µA
I
O
∆V
O
/∆V
IN
∆V
O
/∆I
O
RR
∆V
I O
Line Regulation
Load Regulation
Ripple Rejection
Dropout Voltage(*3)
Average Temperature
Coefficient of Output Voltage
Control Current
Control Voltage for ON-state
Control Voltage for OFF-state
V
O
×
0.9
V
IN
= V
O
+1V to 40V, I
O
=30mA (V
O
≥3V)
V
IN
= 4V to 40V, I
O
=30mA (V
O
<3V)
I
O
=0mA to 500mA
V
O
=3.3V
V
IN
= V
O
+1V ,ein=200mVrms,
V
O
=5.0V
f=1kHz, I
O
=10mA
V
O
=8.0V
V
O
=15V
I
O
=300mA
Ta=0 to 85°C, I
O
=30mA
V
CONT
=1.6V
500
-
-
-
-
-
-
-
-
-
1.6
-
-
-
-
62
60
55
50
0.27
±50
1
-
-
-
0.03
0.006
-
-
-
-
0.42
-
3
-
0.6
mA
%/V
%/mA
dB
V
ppm/°C
µA
V
V
∆V
O
/∆Ta
I
CONT
V
CONT(ON)
V
CONT(OFF)
(*3):The output voltage excludes under 3.8V
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.
POWER DISSIPATION vs. AMBIENT TEMPERATURE
NJW4185DL3 PowerDissipation
(Topr=-40~+85°C,Tj=150°C)
3500
3000
2500
2000
1500
1000
500
0
-50
-25
0
25
50
75
100
125
150
on 2 layers board
Power Dissipation P
D
(mW)
on 4 layers board
Temperature : Ta(°C)
Ver.2013-04-17
-3-
NJW4185
*In the case of using a resistance "R" between V
IN
and control.
If this resistor is inserted, it can reduce the control current when the control voltage is high.
The applied voltage to control pin should set to consider voltage drop through the resistor “R” and the minimum
control voltage for ON-state.
The V
CONT (ON)
and I
CONT
have temperature dependence as shown in the "Control Current vs. Temperature" and "
Control Voltage vs. Temperature" characteristics. Therefore, the resistance "R" should be selected to consider the
temperature characteristics.
*Input Capacitor C
IN
Input Capacitor C
IN
is required to prevent oscillation and reduce power supply ripple for applications when high
power supply impedance or a long power supply line.
Therefore, use the recommended C
IN
value (refer to conditions of ELECTRIC CHARACTERISTIC) or larger and
should connect between GND and V
IN
as shortest path as possible to avoid the problem.
*Output Capacitor 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.
Use of a smaller C
O
may cause excess output noise or oscillation of the regulator due to lack of the phase
compensation.
On the other hand, Use of a larger C
O
reduces output noise and ripple output, and also improves output
transient response when rapid load change.
Therefore, use the recommended C
O
value (refer to conditions of ELECTRIC CHARACTERISTIC) or larger
and should connect between GND and V
OUT
as shortest path as possible for stable operation
The recommended capacitance depends on the output voltage rank. Especially, low voltage regulator requires larger
C
O
value.
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.
When selecting C
O,
recommend that have withstand voltage margin against output voltage and superior temperature
characteristic.
Ver.2013-04-17
-5-
Analog electronics
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