lm2575hvs-adjep National Semiconductor Corporation, lm2575hvs-adjep Datasheet

lm2575hvs-adjep

Manufacturer Part Number

lm2575hvs-adjep

Description

Simple Switcher 1a Step-down Voltage Regulator

Manufacturer

National Semiconductor Corporation

Datasheet

1.LM2575HVS-ADJEP.pdf (26 pages)

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LM2575EP/LM2575HVEP

SIMPLE SWITCHER

General Description

The LM2575EP series of regulators are monolithic inte-

grated circuits that provide all the active functions for a

step-down (buck) switching regulator, capable of driving a

1A load with excellent line and load regulation. These de-

vices are available in fixed output voltages of 3.3V, 5V, 12V,

15V, and an adjustable output version.

Requiring a minimum number of external components, these

regulators are simple to use and include internal frequency

compensation and a fixed-frequency oscillator.

The LM2575EP series offers a high-efficiency replacement

for popular three-terminal linear regulators. It substantially

reduces the size of the heat sink, and in many cases no heat

sink is required.

A standard series of inductors optimized for use with the

LM2575EP are available from several different manufactur-

ers. This feature greatly simplifies the design of switch-mode

power supplies.

Other features include a guaranteed

put voltage within specified input voltages and output load

conditions, and

shutdown is included, featuring 50 µA (typical) standby cur-

rent. The output switch includes cycle-by-cycle current limit-

ing, as well as thermal shutdown for full protection under

fault conditions.

Ordering Information

SIMPLE SWITCHER

PART NUMBER

LM2575HVS-5.0EP

LM2575HVS-ADJEP

(Notes 1, 2)

is a registered trademark of National Semiconductor Corporation.

10% on the oscillator frequency. External

4% tolerance on out-

DS201132

VID PART NUMBER

V62/04742-01

V62/04742-02

TBD

1A Step-Down Voltage Regulator

ENHANCED PLASTIC

• Extended Temperature Performance of

• Baseline Control - Single Fab & Assembly Site

• Process Change Notification (PCN)

• Qualification & Reliability Data

• Solder (PbSn) Lead Finish is standard

• Enhanced Diminishing Manufacturing Sources (DMS)

Features

n 3.3V, 5V, 12V, 15V, and adjustable output versions

n Adjustable version output voltage range,

n Guaranteed 1A output current

n Wide input voltage range, 40V up to 60V for HV version

n Requires only 4 external components

n 52 kHz fixed frequency internal oscillator

n TTL shutdown capability, low power standby mode

n High efficiency

n Uses readily available standard inductors

n Thermal shutdown and current limit protection

n P

Applications

n Simple high-efficiency step-down (buck) regulator

n Efficient pre-regulator for linear regulators

n On-card switching regulators

n Positive to negative converter (Buck-Boost)

n Selected Military Applications

n Selected Avionics Applications

−40˚C ≤ T

Support

1.23V to 37V (57V for HV version)

line and load conditions

Product Enhancement tested

≤ +125˚C

NS PACKAGE NUMBER (Note 3)

TS5B

TBD

4% max over

December 2004

www.national.com

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