ST1S14 datasheet(1/46 Pages) STMICROELECTRONICS

Part #	ST1S14

Description	Power good open collector output

PDF	46 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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1 / 46 page

This is information on a product in full production.

March 2013

DocID17977 Rev 2

1/46

46

ST1S14

Up to 3 A step-down switching regulator

Datasheet

- production data

Features

• 3 A DC output current

• Operating input voltage from 5.5 V to 48 V

• 850 kHz internally fixed switching frequency

• Internal soft-start

• Power good open collector output

• Current mode architecture

• Embedded compensation network

• Zero load current operation

• Internal current limiting

• Inhibit for zero current consumption

• 2 mA maximum quiescent current over

temperature range

• 250 mΩ typ. RDS(on)

• Thermal shutdown

Applications

• Factory automation

• Printers

• DC-DC modules

• High current LED drivers

Description

The ST1S14 is a step-down monolithic power

switching regulator able to deliver up to 3 A DC

current to the load depending on the application

conditions. The high current level is also achieved

thanks to a HSOP8 package with exposed frame,

that allows to reduce the Rth(JA) down to

approximately 40 °C/W. The output voltage can

be set from 1.22 V. The device uses an internal N-

channel DMOS transistor (with a typical RDS(on) of

200 m

Ω) as the switching element to minimize the

size of the external components. The internal

oscillator fixes the switching frequency at 850

kHz. Power good open collector output validates

the regulated output voltage as soon as it reaches

the regulation. Pulse-by-pulse current limit offers

an effective constant current short-circuit

protection. Current foldback decreases overstress

in a persistent short-circuit condition.

Figure 1. Application schematic

HSOP8 - exposed pad

www.st.com

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ST1S14 Datasheet(PDF) 1 Page - STMicroelectronics

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