NJW4158
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Ver.2012-08-06
Switching Regulator IC for Buck Converter
Current Mode Control w/ 40V/8A MOSFET
GENERAL DESCRIPTION ■ PACKAGE OUTLINE
FEATURES
Current Mode Control
Wide Input Range: 6V to 40V
Switching Current 10.5A min.
PWM Control
Built-in Compensation Circuit
Oscillating Frequency: 150kHz typ.
Soft Start Function 10ms typ.
UVLO (Under Voltage Lockout)
Over Current Protection
Thermal Shutdown Function
Package Outline TO-220F-4pin
BLOCK DIAGRAM
V
+
IN-
ER⋅AMP
Buf f er
OCP
CURRENT
SENSE
TSD
VrefSof t Start
UV LO
SLOPE
COMP.
0.8V
S Q
R
OSC
GND
SW
PWM
Low Frequency
Con tr o l
Drain
Source
The NJW4158 is a current mode controlled buck converter with
40V/8A MOSFET that operates wide input range from 6V to 35V.
The NJW4158 can realize a buck converter with minimal external
components that it includes compensation circuit.
The NJW4158 is able to stable startup by soft start function.
lso, it has over current protection and thermal shutdown circuit.
It is suitable for supplying power to an Office Automation
Equipment, Industrial Instrument, Amusement, Wireless Base
Station Applications and so on.
PIN CONFIGURATION
1. V+
2. SW
3. GND
4. IN-
NJW4158F NJW4158FL
1 2 3 4