LT3479EFEPBF Linear Technology Corporation, LT3479EFEPBF Datasheet

LT3479EFEPBF

Manufacturer Part Number

LT3479EFEPBF

Description

TSSOP16

Manufacturer

Linear Technology Corporation

Datasheet

1.LT3479EFEPBF.pdf (20 pages)

Specifications of LT3479EFEPBF

Date_code

07+

Current page: 1 of 20
Download datasheet (240Kb)

APPLICATIONS

TYPICAL APPLICATION

FEATURES

Wide Input Voltage Range: 2.5V to 24V

3A, 42V Internal Switch

High Efﬁ ciency Power Conversion: Up to 89%

Soft-Start

Frequency Set by External Resistor: 200kHz to

3.5MHz

Protection Against Input Short Circuits and

Hot Plugging

Low V

Capable of Positive and Negative Outputs

Available in Thermally Enhanced 14-Lead

(4mm × 3mm) DFN and 16-Lead TSSOP Packages

High Power LED Driver

DSL Modems

Distributed Power

2.2μF

CESAT

10nF

Switch: 0.3V at 2.5A (Typical)

SHDN

5V to 12V Boost Converter

17.8k

LT3479

GND

4.7μH

3479 TA01

FBN

FBP

REF

10k

2.2nF

200k

23.2k

10μF

12V

0.8A

OUT

and Inrush Current Protection

DESCRIPTION

The LT

DC/DC converter with an internal 3A, 42V switch. Efﬁ cien-

cies of up to 89% can be achieved in typical applications. It

features a programmable soft-start function to limit induc-

tor current during start-up and inrush current protection

to protect the LT3479 during shorts and line transients.

Both inputs of the error ampliﬁ er are available to the user

allowing positive and negative output voltages. Through

an external resistor, the user can program the switch-

ing frequency from 200kHz to 3.5MHz. The low proﬁ le

(0.75mm) 14-pin, 4mm × 3mm DFN package provides

excellent thermal performance in a small footprint. The

LT3479 is also available in a thermally enhanced 16-pin

TSSOP package.

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

3A, Full Featured DC/DC

Converter with Soft-Start

3479 is a current mode, ﬁ xed frequency step-up

5V to 12V Efﬁ ciency

0.2

OUT

0.4

(A)

0.6

3479 TA02

0.8

LT3479

3479fb

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