LTM4604 LINER [Linear Technology], LTM4604 Datasheet

LTM4604

Manufacturer Part Number

LTM4604

Description

Low Voltage, 4A DC/DC ?ModuleTM with Tracking

Manufacturer

LINER [Linear Technology]

Datasheet

1.LTM4604.pdf (20 pages)

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FEATURES

APPLICATIONS

■

TYPICAL APPLICATION

Complete Standalone Power Supply

Wide Input Voltage Range: 2.375V to 5.5V

4A DC, 5A Peak Output Current

0.8V to 5V Output

Output Voltage Tracking

±2% Total DC Error

UltraFast

Power Good Indicator

Current Mode Control

Current Foldback Protection, Parallel/Current Sharing

Up to 95% Efﬁ ciency

Programmable Soft-Start

Micropower Shutdown: I

Overtemperature Protection

Small and Very Low Proﬁ le Package:

15mm × 9mm × 2.3mm LGA

Telecom and Networking Equipment

Servers

Storage Cards

ATCA Cards

Industrial Equipment

10μF

6.3V

3.3V to 2.5V/4A μModule Regulator

Transient Response

PGOOD

COMP

RUN/SS

LTM4604

3.3V

GND

TRACK

OUT

≤ 7μA

2.37k

4604 TA01a

22μF

6.3V

×2

2.5V

OUT

DESCRIPTION

The LTM

supply. Included in the package are the switching control-

ler, power FETs, inductor and all support components.

Operating over an input voltage range of 2.375V to 5.5V,

the LTM4604 supports an output voltage range of 0.8V

to 5V, set by a single resistor. This high efﬁ ciency design

delivers up to 4A continuous current (5A peak). Only bulk

output capacitors are needed to complete the design.

The low proﬁ le package (2.3mm) enables utilization of

unused space on the bottom of PC boards for high density

point of load regulation. High switching frequency and

a current mode architecture enable a very fast transient

response to line and load changes without sacriﬁ cing

stability. The device supports output voltage tracking for

supply rail sequencing.

Fault protection features include foldback current protec-

tion, thermal shutdown and a programmable soft-start

function. The LTM4604 is offered in a space saving and

thermally enhanced 15mm × 9mm × 2.3mm LGA package

and is Pb free and RoHS compliant.

μModule and UltraFast are trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

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

Low Voltage, 4A DC/DC

µModule

4604 is a complete 4A switch mode DC/DC power

100

Efﬁ ciency vs Output Current

OUTPUT CURRENT (A)

with Tracking

OUT

= 3.3V

= 2.5V

LTM4604

$ /

4604f

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