SC174 datasheet(1/27 Pages) SEMTECH

tên linh kiện	SC174

Giải thích chi tiết về linh kiện	4A EcoSpeedTM Synchronous Step-Down Regulator with Optional Ultrasonic Power Save

PDF	27 Pages

Scroll/Zoom	100%

nhà sản xuất	SEMTECH [Semtech Corporation]

Trang chủ	http://www.semtech.com

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1 / 27 page

May 18 , 2010

Description

V

IN: 3V to 5.5V

V

OUT: 0.75V to 95% x VIN

I

OUT: Up to 4A

Low R

DS(ON) Switches

Up to 95% Peak Efficiency

High Output Accuracy

Small Ceramic Capacitors

Power Good Pin (Open-Drain)

Patented Adaptive On-Time Control:

Excellent Transient Response

Programmable Pseudo-fixed Frequency

Fault Protection Features:

Cycle-by-Cycle Current Limit

Short Circuit Protection

Over and Under Output Voltage Protection

Over-Temperature

Internal Soft start

Ultrasonic Power Save

Smart Power Save

Ultra-Small Lead-Free 3x3mm, 10-Pin MLPD Package

Fully WEEE and RoHS Compliant



Applications

Networking Equipment, Embedded Systems

Medical Equipment, Office Automation

Instrumentation, Portable Systems

Consumer Devices (DTV, Set-top Box, ... )

5V POL Converters



The SC174 is an integrated, synchronous 4A EcoSpeedTM

step-down regulator, which incorporates Semtech’s

advanced, patented adaptive on-time architecture to

achieve best-in-class performance in dynamic point-of-

load applications. The input voltage range is 3V to 5.5V

with a programmable output voltage from 0.75V up to

95% x V

IN. The device features low-RDS(ON) internal switch-

es and optional PSAVE mode for high efficiency across

the output load range.

Adaptive on-time control provides programmable pseu-

do-fixed frequency operation and excellent transient

performance. The switching frequency can be set from

200kHz to 1MHz - allowing the designer to reduce exter-

nal LC filtering and minimize light load (standby) losses.

Disabling PSAVE operation reduces output voltage ripple

at light load for ceramic output capacitors.

Additional features include cycle-by-cycle current limit,

soft start, input UVLO and output OV protection, and

over temperature protection. The open-drain P

GOOD pin

provides output status. Standby current is less than 10μA

when disabled.

The device is available in a low profile, thermally en-

hanced MLPD-3x3mm 10-pin package.

Features

SC174

3 to 5.5V

VIN

EN/PSV

PGND

Enable /

Power Save

AGND

LX

VDD

Power Good

FB

PGOOD

BST

TON

VOUT = 0.75V to 95% VIN

4A EcoSpeedTM Synchronous Step-Down

Regulator with Optional Ultrasonic Power Save

SC174

POWER MANAGEMENT

1

Typical Application Circuit

Số phần tương tự - SC174

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	SC170X210X15	465Kb / 13P	STANDARD SHAFT SEALS

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