LTM4649

1

4649fc

For more information www.linear.com/LTM4649

TYPICAL APPLICATION

FEATURES

DESCRIPTION

10A Step-Down DC/DC

µModule Regulator

The LTM®4649 is a complete 10A high efficiency switching

15mm×4.92BGApackage.Includedinthepackagearethe

switching controller, power FETs, inductor, and all support

components.Operatingoveraninputvoltagerangeof4.5V

to 16V, the LTM4649 supports an output voltage range of

0.6V to 3.3V, set by a single external resistor. This high

efficiency design delivers 10A continuous current. Only

bulk input and output capacitors are needed.

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

frequency synchronization, programmable multiphase

operation, and output voltage tracking for supply rail

sequencing.

Fault protection features include output overvoltage and

overcurrent protection. The LTM4649 is offered in a small

9mm×15mm×4.92mmBGApackageavailablewithSnPb

or RoHS compliant terminal finish.

Efficiency and Power Loss

at 12V and 5V Input

Current Derating: 12V Input,

4.5V to 16V Input, 1.5V Output DC/DC

µModule Regulator

APPLICATIONS

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10A DC Output Current

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Input Voltage Range: 4.5V to 16V

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Output Voltage Range: 0.6V Up to 3.3V

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No Heat Sink or Current Derating Up to 85°C Ambi-

ent Temperature

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±1.5% Total DC Voltage Output Error

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Multiphase Operation with Current Sharing

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Remote Sense Amplifier

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Built-In General Purpose Temperature Monitor

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tion for High Efficiency at Light Load

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Soft-Start/Voltage Tracking

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Protection: Output Overvoltage and Overcurrent

Foldback

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9mm × 15mm × 4.92mm BGA Package

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Telecom, Networking and Industrial Equipment

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Point of Load Regulation

L

, LT, LTC, LTM, Burst Mode, µModule, PolyPhase, Linear Technology and the Linear logo

are registered trademarks of Analog Devices, Inc. All other trademarks are the property of their

respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5929620, 6100678,

6144194, 6177787, 6304066, 6580258 and 8163643. Other patents pending.

SW

RUN

MODE

PHMODE

TRACK/SS

TEMP

DIFFOUT

DIFFP

DIFFN

COMP

PGOOD

CLKIN

FREQ

LTM4649

GND

0.1µF

100µF

6.3V

×2

6.65k

22µF

16V

×2

4.5V TO 16V

1.5V

10A

CLKOUT

4649 TA01a

LOAD CURRENT (A)

0

65

70

75

80

85

90

95

0

0.5

1.0

1.5

2.0

2.5

3.0

2

4

6

8

4649 TA01b

10

AMBIENT TEMPERATURE (°C)

0

0

2

4

6

8

12

20

40

60

80

4649 TA01c

100

120

10

400LFM

200LFM

0LFM