LM2576T-5.0/NOPB National Semiconductor, LM2576T-5.0/NOPB Datasheet

LM2576T-5.0/NOPB

Manufacturer Part Number

LM2576T-5.0/NOPB

Description

IC REG SIMPLE SWITCHER TO-220-5

Manufacturer

National Semiconductor

Series

SIMPLE SWITCHER®r

Type

Step-Down (Buck)r

Datasheets

1.LM2576T-5.0NOPB.pdf (24 pages)

2.LM2576T-5.0NOPB.pdf (8 pages)

Specifications of LM2576T-5.0/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

Current - Output

Frequency - Switching

52kHz

Voltage - Input

4 ~ 40 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Through Hole

Package / Case

TO-220-5 (Straight Leads)

Current, Input Bias

50 nA

Current, Output

3 A

Current, Supply

5 mA

Frequency, Oscillator

52 kHz

Package Type

TO-220

Regulator Type

Buck (Step-Down)

Resistance, Thermal, Junction To Case

2 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

40 V

Voltage, Output

5 V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM2576T-5.0
8LM2576T-5.0/NOPB
LM2576T-5.0

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Current page: 1 of 8
Download datasheet (147Kb)

LM2576/LM2576HV Series

SIMPLE SWITCHER

General Description

The LM2576 series of regulators are monolithic integrated

circuits that provide all the active functions for a step-down

(buck) switching regulator, capable of driving 3A 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 LM2576 series offers a high-efficiency replacement for

popular three-terminal linear regulators. It substantially re-

duces the size of the heat sink, and in some cases no heat

sink is required.

A standard series of inductors optimized for use with the

LM2576 are available from several different manufacturers.

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.

Typical Application

Versions)

SIMPLE SWITCHER

is a registered trademark of National Semiconductor Corporation.

10% on the oscillator frequency. External

(Fixed Output Voltage

4% tolerance on out-

DS011476

3A Step-Down Voltage Regulator

FIGURE 1.

Features

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

n Adjustable version output voltage range,

n Guaranteed 3A output current

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

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+ Product Enhancement tested

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)

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

line and load conditions

HV version

01147601

4% max over

Related parts for LM2576T-5.0/NOPB

LM2576T-5.0/NOPB Summary of contents

Page 1

... Typical Application (Fixed Output Voltage Versions) SIMPLE SWITCHER ® registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation 3A Step-Down Voltage Regulator ® Features n 3.3V, 5V, 12V, 15V, and adjustable output versions n Adjustable version output voltage range, 1 ...

Page 2

... Output Voltage 5 LM2576HVS-12 LM2576HVS-15 LM2576HVS-ADJ LM2576S-12 LM2576S-15 LM2576SX-12 LM2576SX-15 LM2576HVT-12 LM2576HVT-15 LM2576HVT-ADJ LM2576T-12 LM2576T-15 LM2576HVT-12 LM2576HVT-15 LM2576HVT-ADJ Flow LB03 Flow LB03 LM2576T-12 LM2576T-15 Flow LB03 Flow LB03 2 01147602 NS Package Package Type ADJ Number TS5B TO-263 LM2576S-ADJ TS5B Tape & Reel LM2576SX-ADJ ...

Page 3

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Maximum Supply Voltage LM2576 LM2576HV ON /OFF Pin Input Voltage Output Voltage to Ground (Steady State) Power Dissipation Storage Temperature Range Maximum Junction Temperature LM2576-3 ...

Page 4

LM2576-5.0, LM2576HV-5.0 Electrical Characteristics Specifications with standard type face are for T perature Range. Symbol Parameter SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2 η Efficiency LM2576-12, LM2576HV-12 Electrical Characteristics Specifications with standard type face are for T Range. Symbol ...

Page 5

LM2576-ADJ, LM2576HV-ADJ Electrical Characteristics Specifications with standard type face are for T Range. Symbol Parameter SYSTEM PARAMETERS (Note 3) Test Circuit Figure 2 V Feedback Voltage OUT V Feedback Voltage OUT LM2576 V Feedback Voltage OUT LM2576HV η Efficiency All ...

Page 6

All Output Voltage Versions Electrical Characteristics Specifications with standard type face are for T Range. Unless otherwise specified 30V for the 15V version 500 mA. LOAD Symbol Parameter DEVICE PARAMETERS θ Thermal Resistance JA θ ...

Page 7

... Physical Dimensions inches (millimeters) unless otherwise noted 5-Lead TO-220 (T) Order Number LM2576T-3.3, LM2576HVT-3.3, LM2576T-5.0, LM2576HVT-5.0, LM2576T-12, LM2576HVT-12, LM2576T-15, LM2576HVT-15, LM2576T-ADJ or LM2576HVT-ADJ NS Package Number T05A 21 ...

Page 8

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) Order Number LM2576T-3.3 Flow LB03, LM2576T-XX Flow LB03, LM2576HVT-3.3 Flow LB03, LM2576T-5.0 Flow LB03, LM2576HVT-5.0 Flow LB03, LM2576T-12 Flow LB03, LM2576HVT-12 Flow LB03, LM2576T-15 Flow LB03, LM2576HVT-15 Flow LB03, LM2576T-ADJ Flow LB03 or LM2576HVT-ADJ Flow LB03 ...

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