Package Image


The STR5A460 Series is power ICs for switching power supplies, incorporating a MOSFET and a current mode PWM controller IC for non-isolated Buck converter and Inverting converter topologies.
The operation mode is automatically changed, in response to load, to the fixed switching frequency, to the switching frequency control, and to the burst oscillation mode. Thus the power efficiency is improved.
The product achieves high cost-performance power supply systems with few external components.


    ・Buck converter
    ・Inverting converter
    ・Current mode type PWM control
    ・Automatically changed operation mode in response to load conditions
       Fixed switching frequency mode, 60 kHz (typ.)
       Green mode, 23 kHz (typ.) to 60 kHz (typ.)
       Burst oscillation mode
    ・No need for current detection resistor, building in a MOSFET used as current sense resistor
    ・Built-in Startup Function
    ・Built-in Error Amplifier
    ・Random Switching Function
    ・Leading Edge Blanking Function
    ・Soft Start Function
       Overload Protection (OLP): Auto-restart
       Overvoltage Protection (OVP): Auto-restart
       Thermal Shutdown with hysteresis (TSD): Auto-restart


    ・White goods
    ・Auxiliary power supply (lighting equipment with
     microcomputer, etc.)
    ・Power supply for motor control (actuator, etc.)
    ・Telecommunication equipment (convertible from 48VDC
     to 15VDC)
    ・Other Switching mode power supply, SMPS


Control Method PWM
Type Power IC
Output Current IDLIM=0.41A W
RDS(ON) (max.) 13.600 Ω
VDSS (min.) 700 V
VCC (max.) 32 V
Oscillating Frequency(typ.) 60 kHz
OLP Auto Restart
OVP Auto Restart
Brown-in / out NO
TSD Auto Restart
Power Consumption at No Load
Package Weight (Typ.) 0.078 g
Automotive Qualified NO

Typical Application

Typical Application

Block Diagram

Block Diagram

Pin Configuration Definitions

Pin Configuration Definitions

Selection Guide

STR5A460 Series

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