LM3578AN/NOPB National Semiconductor, LM3578AN/NOPB Datasheet

LM3578AN/NOPB

Manufacturer Part Number

LM3578AN/NOPB

Description

IC REGULATOR SWITCHING 8-DIP

Manufacturer

National Semiconductor

Type

Step-Down (Buck), Step-Up (Boost), Inverting, Flybackr

Datasheets

1.LM3578AMNOPB.pdf (20 pages)

2.LM3578ANNOPB.pdf (4 pages)

Specifications of LM3578AN/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Current - Output

750mA

Frequency - Switching

20kHz

Voltage - Input

2 ~ 40 V

Operating Temperature

0°C ~ 70°C

Mounting Type

Through Hole

Package / Case

8-DIP (0.300", 7.62mm)

Current, Input Bias

4 μA

Current, Output

750 mA

Current, Supply

14 mA

Frequency, Oscillator

20 kHz

Package Type

DIP-8

Regulation, Line

0.003 %/V

Regulator Type

Boost, Buck, DC-DC, Switching

Temperature, Operating, Range

0 to +125 °C

Voltage, Input

2 to 40 V

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Power - Output

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM3578AN
*LM3578AN/NOPB
LM3578AN
LM3578N

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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

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

Related parts for LM3578AN/NOPB

LM3578AN/NOPB Summary of contents

Page 1

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 ...

Page 2

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Total Supply Voltage Collector Output to Ground Emitter Output to Ground (Note 2) Power Dissipation (Note 3) Output Current Storage Temperature Lead Temperature (soldering, 10 seconds) ...

Page 3

Electrical Characteristics These specifications apply for 2V ≤ V duty cycle ≤ 75%, unless otherwise specified. Values in standard typeface are for T operation over the specified operating junction temperature range. Symbol Parameter CURRENT LIMIT ∆V /∆T Sense Voltage Temperature ...

Page 4

... BANNED SUBSTANCE COMPLIANCE National Semiconductor manufactures products and uses packing materials that meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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