LTM4604

1

4604f

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Low Voltage, 4A DC/DC

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 efficiency design

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

output capacitors are needed to complete the design.

The low profile 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 sacrificing

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.

3.3V to 2.5V/4A μModule Regulator

15mm × 9mm × 2.3mm LGA

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

μModule and UltraFast are trademarks of Linear Technology Corporation.

All other trademarks are the property of their respective owners.

3.3V

PGOOD

COMP

LTM4604

RUN/SS

2.37k

4604 TA01a

22

μF

6.3V

×2

2.5V

4A

10

μF

6.3V

FB

TRACK

GND

OUTPUT CURRENT (A)

0

85

90

100

3

"$" /

80

75

12

4

70

65

95

Efficiency vs Output Current