AN2833 datasheet(1/32 Pages) STMICROELECTRONICS

Part #	AN2833

Description	Dual step-down controller with auxiliary voltages for industrial system power

PDF	32 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 32 page

February 2009

Rev 2

1/32

AN2833

Application note

Dual step-down controller with auxiliary voltages

for industrial system power

Introduction

The PM6681A is a dual step-down controller with adjustable output voltages that can be

used in industrial power systems and this demonstration kit represents a typical application

circuit. The PM6681A demonstration kit allows testing all the device's functions and provides

two switching sections, with (typically) 3.3 V (OUT1) and 1.8 V (OUT2) outputs from 5.5 V to

36 V input voltage. The typical operating switching frequency of the two available sections is

200 kHz/300 kHz, respectively. Each switching section delivers more than 2.5 A output

current. An internal linear regulator provides a fixed 5 V output voltage. Another internal

linear regulator provides an adjustable output voltage (default 2.5 V). Both linear regulators

can deliver up to 100 mA peak current.

Figure 1.

PM6681A demonstration kit

AM01436v1

www.st.com

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