LTM4607IV Ver la hoja de datos (PDF) - Linear Technology

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LTM4607IV

36VIN, 24V out High Efficiency Buck-Boost DC/DC Micro Module Regulator / LGA Package.

Linear Technology 

LTM4607

36VIN, 24VOUT High Efficiency

Buck-Boost DC/DC µModule

FEATURES

■ Single Inductor Architecture Allows VIN Above,

Below or Equal to VOUT

■ Wide VIN Range: 4.5V to 36V

■ Wide VOUT Range: 0.8V to 24V

■ 5A DC (10A DC in Buck Mode)

■ High Efficiency 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 Profile Surface Mount LGA Package

(15mm × 15mm × 2.8mm)

APPLICATIONS

■ Telecom, Servers and Networking Equipment

■ Industrial and Automotive Equipment

■ High Power Battery-Operated Devices

DESCRIPTION

The LTM®4607 is a high efficiency switching mode buck-

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 36V, the

LTM4607 supports an output voltage range of 0.8V to

24V, set by a resistor. This high efficiency design delivers

up to 5A continuous current in boost mode (10A in buck

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

output capacitors are needed to finish the design.

The low profile 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 without sacrificing stability. The

LTM4607 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 thermally enhanced 15mm × 15mm × 2.8mm LGA

package. The LTM4607 is Pb-free and RoHS compliant.

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

Corporation. μModule is a trademark of Linear Technology Corporation. All other

trademarks are the property of their respective owners.

TYPICAL APPLICATION

20V/2.5A Buck-Boost DC/DC μModule with 4.5V to 36V Input

VIN

4.5V TO 36V

10μF

50V

ON/OFF

0.1μF

CLOCK SYNC

VIN PLLIN VOUT

FCB

RUN LTM4607

SW1

SW2

RSENSE

SENSE+

SS

SGND

SENSE–

PGND

VFB

4.7μH

R2

7mΩ

4.12k

10μF +

35V

330μF

25V

VOUT

20V

2.5A

4607 TA01

Efficiency and Power Loss vs

Input Voltage

100

6

99

98

5

97

4

96

95

3

94

2

93

92

1

91

VOUT = 20V, 2.5A

f = 200kHz

90

0

6 11 16 21 26 31 36

VIN (V)

4607 TA01b

4607f

1

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