LTM4661

1

4661f

For more information www.linear.com/LTM4661

TYPICAL APPLICATION

FEATURES

DESCRIPTION

15V, 4A Step-Up

µModule Regulator

The LTM®4661 is a synchronous step-up switching mode

× 2.42mm BGA package. Included in the package are the

switching controller, power FETs, inductor and all support

components. Operating over an input voltage of 1.8V to

5.5V, down to 0.7V after start-up, the LTM4661 regulates

an output voltage of 2.5V to 15V set by an external resistor.

It provides up to 4A switch current. Only bulk input and

output capacitors are needed.

The LTM4661 1MHz switching frequency and dual phase

singleoutputarchitectureenablefasttransientresponseto

line and load changes and a significant reduction of output

ripple voltage. It supports frequency synchronization,

The LTM4661 features a true output disconnect during

shutdown and inrush current limit at start-up. It also has

short-circuit,overvoltageandovertemperatureprotection.

The LTM4661 is Pb-free and RoHS compliant.

5V/2A DC/DC Step-Up µModule Regulator

Efficiency vs Output Current at 3.3V Input

APPLICATIONS

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Input Voltage Range: 1.8V to 5.5V, Down to 0.7V

After Start-Up

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Output Voltage Range: 2.5V to 15V

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4A Switch Current

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Dual Phase Operation

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±3% Maximum Total DC Output Voltage Regulation

Over Load, Line and Temperature

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Output Disconnect in Shut Down

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Inrush Current Limit

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External Frequency Synchronization

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Output Overvoltage and Overtemperature Protection

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6.25mm × 6.25mm × 2.42mm BGA package

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RF Microwave Power Amplifiers

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Battery Powered DC Motors

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3.3V Bus Telecom Transceivers

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22µF ×2

16V

22µF ×2

6.3V

2.2µF

R1

31.6k

4661 TA01a

FB

5V/2A

SDB

MODE/SYNC

FREQ COMP

GND

3.3V

LOAD CURRENT (A)

0

100

75

95

85

90

80

70

1

1.8

0.6

1.4

4661 TA01b

2

0.8

1.6

0.4

1.2

0.2