LM2575SX33NOPB National Semiconductor, LM2575SX33NOPB Datasheet

LM2575SX33NOPB

Manufacturer Part Number

LM2575SX33NOPB

Description

TO-263

Manufacturer

National Semiconductor

Datasheet

1.LM2575HVTADJNOPB.pdf (28 pages)

Specifications of LM2575SX33NOPB

Date_code

07+

Current page: 1 of 28
Download datasheet (857Kb)

LM1575/LM2575/LM2575HV

SIMPLE SWITCHER

General Description

The LM2575 series of regulators are monolithic integrated

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 devices are avail-

able 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 LM2575 series offers a high-efficiency replacement for

popular three-terminal linear regulators. It substantially re-

duces 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

LM2575 are available from several different manufacturers.

This feature greatly simplifies the design of switch-mode pow-

er supplies.

Other features include a guaranteed ±4% tolerance on output

voltage within specified input voltages and output load con-

ditions, and ±10% on the oscillator frequency. External shut-

down is included, featuring 50 μA (typical) standby current.

The output switch includes cycle-by-cycle current limiting, as

well as thermal shutdown for full protection under fault con-

ditions.

Typical Application

(Fixed Output Voltage Versions)

Note: Pin numbers are for the TO-220 package.

SIMPLE SWITCHER

is a registered trademark of National Semiconductor Corporation

11475

1A Step-Down Voltage Regulator

Features

■

Applications

■

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

Adjustable version output voltage range,

Guaranteed 1A output current

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

Requires only 4 external components

52 kHz fixed frequency internal oscillator

TTL shutdown capability, low power standby mode

High efficiency

Uses readily available standard inductors

Thermal shutdown and current limit protection

Simple high-efficiency step-down (buck) regulator

Efficient pre-regulator for linear regulators

On-card switching regulators

Positive to negative converter (Buck-Boost)

1.23V to 37V (57V for HV version) ±4% max over

line and load conditions

Product Enhancement tested

1147501

www.national.com

April 2007

Related parts for LM2575SX33NOPB

Related keywords

LM2575SX33NOPB datasheet
LM2575SX33NOPB data sheet
LM2575SX33NOPB pdf datasheet
LM2575SX33NOPB component
LM2575SX33NOPB part
LM2575SX33NOPB distributor
LM2575SX33NOPB RoHS
LM2575SX33NOPB datasheet download