LM2578AN National Semiconductor, LM2578AN Datasheet

LM2578AN

Manufacturer Part Number

LM2578AN

Description

DC/DC Converter IC

Manufacturer

National Semiconductor

Datasheets

1.LM2578AN.pdf (20 pages)

2.LM2578AN.pdf (18 pages)

Specifications of LM2578AN

Input Voltage

40V

Output Current

750mA

Output Voltage

No. Of Pins

Operating Temperature Range

-40Â°C To +85Â°C

Mounting Type

Through Hole

Voltage Regulator Type

Switching

Supply Voltage Min

Rohs Compliant

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2578AN

Manufacturer:

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2578AN

Manufacturer:

PHILIPS

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2578AN/N

Manufacturer:

NSC

Quantity:

5 510

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LM2578AN/N

Manufacturer:

MACOM

Quantity:

5 510

Current page: 1 of 20
Download datasheet (2Mb)

LM2578A/LM3578A

Switching Regulator

General Description

The LM2578A is a switching regulator which can easily be

set up for such DC-to-DC voltage conversion circuits as the

buck, boost, and inverting configurations. The LM2578A fea-

tures a unique comparator input stage which not only has

separate pins for both the inverting and non-inverting inputs,

but also provides an internal 1.0V reference to each input,

thereby simplifying circuit design and p.c. board layout. The

output can switch up to 750 mA and has output pins for its

collector and emitter to promote design flexibility. An external

current limit terminal may be referenced to either the ground

or the V

tion, the LM2578A has an on board oscillator, which sets the

switching frequency with a single external capacitor from

Hz to 100 kHz (typical).

The LM2578A is an improved version of the LM2578, offer-

ing higher maximum ratings for the total supply voltage and

output transistor emitter and collector voltages.

Connection Diagram and Ordering Information

terminal, depending upon the application. In addi-

Order Number LM3578AM, LM2578AN or LM3578AN

DS008711

See NS Package Number M08A or N08E

Dual-In-Line Package

Features

n Inverting and non-inverting feedback inputs

n 1.0V reference at inputs

n Operates from supply voltages of 2V to 40V

n Output current up to 750 mA, saturation less than 0.9V

n Current limit and thermal shut down

n Duty cycle up to 90%

Applications

n Switching regulators in buck, boost, inverting, and

n Motor speed control

n Lamp flasher

single-ended transformer configurations

00871129

February 2005

www.national.com

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