ST1S14 datasheet(1/46 Pages) STMICROELECTRONICS

部件名	ST1S14

功能描述	Power good open collector output

PDF	46 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

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

类似零件编号 - ST1S14

制造商	部件名	数据表	功能描述
STMicroelectronics	ST1S14PHR	2Mb / 46P	Up to 3 A step-down switching regulator 04-Mar-2013

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