BL9342

www.belling.com.cn

1

V1.0

40V, 600mA , Step-Down Converter

Description

The BL9342 is a high frequency (1.8MHz) step-down switching regulator with

integrated internal high-side high voltage power MOSFET. It provides single

0.6A(or less) highly efficient output with current mode control for fast loop

response.

The wide input range(4.2V to 40V) accommodates a variety of step-down

applications. Low shutdown mode quiescent current allows use in

battery-powered applications.

High efficiency at light load condition is achieved by scaling down the switching

frequency to reduce the switching and gate driving losses.

The BL9342 is available in SOT23-6L package.

Features

 4.2 V to 40 V operating input range

 230uA operating quiescent current.

 Low shutdown supply current

 500mΩ internal power MOSFET

 1.8 MHz fixed switching frequency

 >90% efficiency

 Internally compensated

 Stable with ceramic output capacitors

 Internal soft-start

 Thermal shutdown function

 Precision current limit without current sensing resistor

 SOT23-6L package

Applications

 High voltage power conversion

 Industrial power systems

 Power meter

 Battery powered systems