600kHz 3A Step-Down Switching Regulator

TJ4519

Jul. 2010 – Preliminary

- 1 -

HTC

SOP8-PP PKG

ORDERING INFORMATION

Device (Marking)

Package

FEATURES

Integrated 3 Amp switch

600kHz frequency of operation

Current mode controller

Precision enable threshold

Available in SOP8-PP Package

APPLICATION

XDSL Modems

CPE equipment

DC-DC point of load applications

Portable equipment

TJ4519DP

SOP8-PP

DESCRIPSION

The TJ4519 is a current mode switching regulator with an integrated switch, operating at 600kHz with enable

functions. The integrated switch allows for cost effective low power solutions (peak switch current 3 amps).

High frequency of operation allows for very small passive components. Current mode operation allows for fast

dynamic response and instantaneous duty cycle adjustment as the input varies (ideal for CPE applications

where the input is a wall plug power). The low shutdown current makes it ideal for portable applications where

battery life is important.

Absolute Maximum Ratings

CHARACTERISTIC

SYMBOL

MIN.

MAX.

UNIT

Input Supply Voltage

-0.3

28

V

-

16

V

Boost Pin Voltage

-0.3

32

V

EN Pin Voltage

-0.3

24

V

FB Pin Voltage

-0.3

6

V

FB Pin Current

-

1

mA

Operating Ambient Temperature Range

-40

85

℃

Operating Junction Temperature Range

-40

150

℃

Storage Temperature Range

-65

150

℃

Lead Temperature (Soldering) 5 sec

-

260

℃

Ordering Information

Order No.

Package

Description

Package Marking

Supplied As

TJ4519DP-8L

SOP8-PP

600kHz 3A Step-Down Regulator

TJ4519

Reel