LM2576S-3.3.TRT

更新时间： 2024-11-15 13:09:19

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商升特 - SEMTECH		稳压器开关
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LM2576S-3.3.TRT 数据手册

LM2575 & LM2576

1A & 3A Miniconverter

Switching Regulators

POWER MANAGEMENT

Description

Features

The LM2575/6 series switching regulators are monolithic

integrated circuits designed for use in buck or buck/

boost regulator applications requiring accurate output

voltages over combined variations of line, load and

temperature. This unique series greatly simplifies

switching power supply design. The LM2575 has a

maximum output current of 1A and the LM2576 is rated

for 3A.

u Pin for pin replacement for Nationals LM2575/6

series

u DC-to-DC buck or buck/boost converter requiring

only 4 support components

u Fixed or adjustable voltages

u Preset output voltages of 3.3V, 5V and 12V

u Wide output voltage range, 1.23V to 35V

u 82% typical efficiency @ 5V out

u Wide input voltage range, 4V to 40V

u Inhibit/enable control pin

The LM2575/6 series miniconverters include a

switching regulator and compensation network all within

the same package. Just add a choke, catch diode and

two capacitors to obtain an efficient DC-to-DC converter.

The current limit and thermal shutdown features of the

LM2575/6 series fully protect the device against

overstress conditions.

u Industrial temperature range

u TO-220 and TO-263 packages

Applications

u Micro controller power supplies

u Medical equipment

u Industrial power supplies

u Instrumentation power supplies

The LM2575/6 series offers an alternative to popular 3

terminal linear regulators by providing higher efficiency

with reduced heatsink size. In many applications a heat

sink will not be required.

Typical Application Circuits

LM2575 LM2576

L₁

D₁

330µH

100µH

C_IN

68µF

120µF

C_OUT330µF 1,000µF

Revision 1, January 2001

www.semtech.com

12 3 4 5 6 7...19

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