Overview

The STK730C is a chopper type step-down dedicated 5 V single output regulator that uses a power MOSFET as its switching element and a Schottky barrier diode (SBD) as its flywheel diode.

Features

• IMST substrate (insulated metal substrate technology)

• Efficiency improved (by 10) by the adoption of

MOSFET and SBD technology.

• An auxiliary drive power supply is no longer required

due to the development of a unique NMOS FET drive

circuit. This means that the STK730C can be used

with a single power supply, thus allowing

simplification of the input system.

• Built-in reverse going linear overload characteristic

curve overcurrent protection circuit

• Ground line handling is eased even in multi-output

power supply structures due to placement of the

overcurrent detection resistor on the plus line.

• The STK730C’s separate excitation oscillator

structure provides high stability in the switching

frequency.

• The STK730C’s switching operating frequency is set

at 125 kHz, which minimizes beating when used in a

multiple output structure with STK731 and STK733

type products.

Applications

• Power supplies in printers and other office equipment

• Power supplies in robots and other factory automation

related equipment

• Power supplies in VCRs and other consumer products

• Secondary side regulators in switching power supplies