LM2676S-12 National Semiconductor, LM2676S-12 Datasheet

LM2676S-12

Manufacturer Part Number

LM2676S-12

Description

DC/DC Converter IC

Manufacturer

National Semiconductor

Datasheets

1.LM2676T-ADJ.pdf (25 pages)

2.LM2676T-ADJ.pdf (25 pages)

3.LM2676T-ADJ.pdf (23 pages)

Specifications of LM2676S-12

Input Voltage

40V

Output Current

Output Voltage

12V

No. Of Pins

Termination Type

SMD

Mounting Type

Through Hole

Voltage Regulator Type

Switching

Output Current Max

Peak Reflow Compatible (260 C)

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LM2676S-12

Manufacturer:

NS/国半

Quantity:

20 000

Current page: 1 of 23
Download datasheet (351Kb)

LM2676

SIMPLE SWITCHER

Voltage Regulator

General Description

The LM2676 series of regulators are monolithic integrated

circuits which provide all of the active functions for a

step-down (buck) switching regulator capable of driving up to

3A loads with excellent line and load regulation characteris-

tics. High efficiency (

low ON-resistance DMOS power switch. The series consists

of fixed output voltages of 3.3V, 5V and 12V and an adjust-

able output version.

The SIMPLE SWITCHER concept provides for a complete

design using a minimum number of external components. A

high fixed frequency oscillator (260KHz) allows the use of

physically smaller sized components. A family of standard in-

ductors for use with the LM2676 are available from several

manufacturers to greatly simplify the design process.

The LM2676 series also has built in thermal shutdown, cur-

rent limiting and an ON/OFF control input that can power

down the regulator to a low 50µA quiescent current standby

condition. The output voltage is guaranteed to a

ance. The clock frequency is controlled to within a

erance.

Typical Application

SIMPLE SWITCHER

is a registered trademark of National Semiconductor Corporation.

90%) is obtained through the use of a

DS100914

High Efficiency 3A Step-Down

2% toler-

11% tol-

Features

n Efficiency up to 94%

n Simple and easy to design with (using off-the-shelf

n 150 m

n 3.3V, 5V and 12V fixed output and adjustable (1.2V to

n 50µA standby current when switched OFF

n Wide input voltage range: 8V to 40V

n 260 KHz fixed frequency internal oscillator

n −40 to +125˚C operating junction temperature range

Applications

n Simple to design, high efficiency (

n Efficient system pre-regulator for linear voltage

n Battery chargers

external components)

37V ) versions

conditions

switching regulators

regulators

2%maximum output tolerance over full line and load

DMOS output switch

DS100914-3

90%) step-down

www.national.com

April 2000

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