LTM4605 Linear Technology Corporation, LTM4605 Datasheet

LTM4605

Manufacturer Part Number

LTM4605

Description

LGA141

Manufacturer

Linear Technology Corporation

Datasheets

1.LTM4605.pdf (24 pages)

2.LTM4605.pdf (24 pages)

Specifications of LTM4605

Date_code

10+

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FEATURES

APPLICATIONS

TYPICAL APPLICATION

4.5V TO 20V

Single Inductor Architecture Allows V

Below or Equal to V

Wide V

5A DC Typical (12A DC Typical at Buck Mode)

High Efﬁ ciency Up to 98%

Current Mode Control

Power Good Output Signal

Phase-Lockable Fixed Frequency: 200kHz to 400kHz

Ultra-Fast Transient Response

Current Foldback Protection

Output Overvoltage Protection

Small, Low Proﬁ le Surface Mount LGA Package

(15mm × 15mm × 2.8mm)

Telecom, Servers and Networking Equipment

Industrial and Automotive Equipment

High Power Battery-Operated Devices

12V/5A Buck-Boost DC/DC μModule with 4.5V to 20V Input

OUT

ON/OFF

Range: 4.5V to 20V

10μF

35V

0.1μF

Range: 0.8V to 16V

RUN

SGND

OUT

LTM4605

PGND

PLLIN

SENSE

SW1

SW2

FCB

OUT

–

CLOCK SYNC

4.7μH

7.15k

Above,

6mΩ

4605 TA01

10μF

35V

Buck-Boost DC/DC µModule

DESCRIPTION

The LTM

boost power supply. Included in the package are the

switching controller, power FETs, and support components.

Operating over an input voltage range of 4.5V to 20V, the

LTM4605 supports an output voltage range of 0.8V to

16V, set by a resistor. This high efﬁ ciency design delivers

up to 5A continuous current in boost mode (12A in buck

mode). Only the inductor, sense resistor, bulk input and

output capacitors are needed to ﬁ nish the design.

The low proﬁ le package enables utilization of unused space

on the bottom of PC boards for high density point of load

regulation. The high switching frequency and current

mode architecture enable a very fast transient response

to line and load changes. The LTM4605 can be frequency

synchronized with an external clock to reduce undesirable

frequency harmonics.

Fault protection features include overvoltage and foldback

current protection. The DC/DC μModule™ is offered in a

small and thermally enhanced 15mm × 15mm × 2.8mm LGA

package. The LTM4605 is Pb-free and RoHS compliant.

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

is a registered trademark of Linear Technology Corporation. μModule is a trademark of Linear

Technology Corporation. All other trademarks are the property of their respective owners.

330μF

25V

12V

OUT

4605 is a high efﬁ ciency switching mode buck-

5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

f = 200kHz

LOAD

OUT

Efﬁ ciency and Power Loss vs

= 12V

= 5A

High Efﬁ ciency

Input Voltage

(V)

LTM4605

4605 TA01b

4605fa

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