Current Mode Control High Speed Frequency Internal 1A MOSFET Switching Regulator IC
NJW4170
Current Mode Control High Speed Frequency Internal 1A MOSFET Switching Regulator IC for Buck Converter
GENERAL...
NJW4170
Current Mode Control High Speed Frequency Internal 1A MOSFET Switching
Regulator IC for Buck Converter
GENERAL DESCRIPTION
The NJW4170 is a high speed oscillating frequency buck converter with 40V/1A MOSFET. Current mode control and built-in phase compensation circuit minimize external parts and contribute to using a Low ESR Output Capacitor(MLCC) within wide input range from 4.5V to 40V. Therefore, the NJW4170 can realize downsizing of applications.
Also, it has a soft start function, an external clock synchronization function, an over current protection and a thermal shutdown circuit.
Over 2MHz of Switching frequency can avoid interference with the AM radio frequency.
It is suitable for supplying power to a Car Accessory, Audio Automation Equipment, Industrial Instrument and so on.
FEATURES
Oscillating Frequency
2.4MHz typ. (A ver.)
2.1MHz typ. (B ver.)
Minimum ON time
80ns typ.(A ver.)
85ns typ.(B ver.)
Current mode Control
External Clock Synchronization
Wide Operating Voltage Range 4.5V to 40V
Switching Current
1.4A min.
PWM Control
Built-in Compensation Circuit
Correspond to Ceramic Capacitor (MLCC)
Soft Start Function
4ms typ.
UVLO (Under Voltage Lockout)
Over Current Protection (Hiccup type)
Thermal Shutdown Protection
Standby Function
Package Outline
NJW4170U2 : SOT-89-5
NJW4170KV1 : DFN8-V1(ESON8-V1)
■ PACKAGE OUTLINE NJW4170U2 NJW4170KV1
PRODUCT CLASSIFICATION
Part Number
Version
NJW4170U2-A
A
NJW4170KV1-A
A
NJW4170U2-B
B
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