LM2679S-5.0/NOPB National Semiconductor, LM2679S-5.0/NOPB Datasheet

LM2679S-5.0/NOPB

Manufacturer Part Number

LM2679S-5.0/NOPB

Description

IC REG SIMPLE SWITCHER TO-263-7

Manufacturer

National Semiconductor

Series

SIMPLE SWITCHER®r

Type

Step-Down (Buck)r

Datasheets

1.LM2679SD-5.0.pdf (26 pages)

2.LM2679S-5.0NOPB.pdf (7 pages)

Specifications of LM2679S-5.0/NOPB

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

Current - Output

Frequency - Switching

260kHz

Voltage - Input

8 ~ 40 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

D²Pak, TO-263 (7 leads + tab)

Current, Input Bias

85 nA

Current, Output

5 A

Current, Supply

6 mA

Frequency, Oscillator

260 kHz

Package Type

TO-263

Regulator Type

Buck (Step-Down)

Resistance, Thermal, Junction To Case

2 °C/W

Temperature, Operating, Range

-40 to +125 °C

Voltage, Input

8 to 40 V

Voltage, Output

5 V

Primary Input Voltage

12V

No. Of Outputs

Output Voltage

Output Current

No. Of Pins

Operating Temperature Range

-40Â°C To +125Â°C

Msl

MSL 3 - 168 Hours

Filter Terminals

SMD

Rohs Compliant

Yes

For Use With

LM2679-5.0EVAL - EVALUATION BOARD FOR LM2679-5.0

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Power - Output

Lead Free Status / Rohs Status

RoHS Compliant part Electrostatic Device

Other names

*LM2679S-5.0
*LM2679S-5.0/NOPB
LM2679S-5.0

Current page: 1 of 7
Download datasheet (441Kb)

LM2679

SIMPLE SWITCHER

Adjustable Current Limit

General Description

The LM2679 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 5A

loads with excellent line and load regulation characteristics.

High efficiency (>90%) is obtained through the use of a low

ON-resistance DMOS power switch. The series consists of

fixed output voltages of 3.3V, 5V and 12V and an adjustable

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 LM2679 are available from several

manufacturers to greatly simplify the design process.

Other features include the ability to reduce the input surge

current at power-ON by adding a softstart timing capacitor to

gradually turn on the regulator. The LM2679 series also has

built in thermal shutdown and resistor programmable current

limit of the power MOSFET switch to protect the device and

load circuitry under fault conditions. The output voltage is

guaranteed to a ±2% tolerance. The clock frequency is con-

trolled to within a ±11% tolerance.

Typical Application

SIMPLE SWITCHER

is a registered trademark of National Semiconductor Corporation

100847

5A Step-Down Voltage Regulator with

Features

■

Applications

■

Efficiency up to 92%

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

external components)

Resistor programmable peak current limit over a range of

3A to 7A.

120 mΩ DMOS output switch

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

37V ) versions

±2%maximum output tolerance over full line and load

conditions

Wide input voltage range: 8V to 40V

260 KHz fixed frequency internal oscillator

Softstart capability

−40 to +125°C operating junction temperature range

Simple to design, high efficiency (>90%) step-down

switching regulators

Efficient system pre-regulator for linear voltage regulators

Battery chargers

10084703

Related parts for LM2679S-5.0/NOPB

LM2679S-5.0/NOPB Summary of contents

Page 1

... The output voltage is guaranteed to a ±2% tolerance. The clock frequency is con- trolled to within a ±11% tolerance. Typical Application SIMPLE SWITCHER ® registered trademark of National Semiconductor Corporation © 2008 National Semiconductor Corporation ® 5A Step-Down Voltage Regulator with Features ■ ...

Page 2

... Connection Diagrams and Ordering Information TO-263 Package Top View Order Number LM2679S-3.3, LM2679S-5.0, LM2679S-12 or LM2679S-ADJ See NSC Package Number TS7B Ordering Information for LLP Package Output Voltage Order Information 12 LM2679SD-12 12 LM2679SDX-12 3.3 LM2679SD-3.3 3.3 LM2679SDX-3.3 5.0 LM2679SD-5.0 5.0 LM2679SDX-5.0 ADJ LM2679SD-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. Input Supply Voltage Softstart Pin Voltage Switch Voltage to Ground (Note 13) Boost Pin Voltage Feedback Pin Voltage Power Dissipation Electrical Characteristics of operation, −40°C to 125°C. Specifications appearing in normal type apply for T LM2679-3 ...

Page 4

All Output Voltage Versions Electrical Characteristics Limits appearing in bold type face apply over the entire junction temperature range of operation, −40°C to 125°C. Specifications appearing in normal type apply for T justable versions and V =24V for the 12V ...

Page 5

Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings indicate conditions under which of the device is guaranteed. Operating Ratings do not imply guaranteed performance limits. For guaranteed performance limits and associated ...

Page 6

... Physical Dimensions inches (millimeters) unless otherwise noted TO-263 Surface Mount Power Package Order Number LM2679S-3.3, LM2679S-5.0, LM2679S-12 or LM2679S-ADJ NS Package Number TS7B 24 ...

Page 7

TO-220 Power Package Order Number LM2679T-3.3, LM2679T-5.0, LM2679T-12 or LM2679T-ADJ NS Package Number TA07B 14-Lead LLP Package NS Package Number SRC14A 25 ...

Related keywords

lm2673
lm2679
lm2678
lm2676
lm2675
lm2677
lm2674
lm2672
lm2671
lm2679sd
lm2679t
lm2679sx-adj
LM2679S-5.0/NOPB datasheet
LM2679S-5.0/NOPB data sheet
LM2679S-5.0/NOPB pdf datasheet
LM2679S-5.0/NOPB component
LM2679S-5.0/NOPB part
LM2679S-5.0/NOPB distributor
LM2679S-5.0/NOPB RoHS
LM2679S-5.0/NOPB datasheet download