LTM4705

1

Rev. 0

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

DC/DC µModule Regulator

The LTM®4705 is a complete dual 5A step-down switch-

6.25mm × 7.5mm × 3.22mm BGA package. Included in

the package are the switching controller, power MOSFETs,

inductor and support components. Operating over an

input voltage range of 3.1V to 20V, the LTM4705 sup-

ports an output voltage range of 0.6V to 5.5V, set by a

single external resistor. Its high efficiency design delivers

dual 5A continuous output current. Only a few ceramic

input and output capacitors are needed.

The LTM4705 supports selectable Burst Mode operation

and output voltage tracking for supply rail sequencing.

Its high switching frequency and current mode control

enable a very fast transient response to line and load

changes without sacrificing stability.

Fault protection features include input overvoltage, output

overcurrent and overtemperature protection.

The LTM4705 is available with RoHS compliant

terminal finish.

2.5V and 1.8V Dual Output DC/DC Step-Down µModule Regulator

12V Input, Efficiency vs Load Current

APPLICATIONS

n

n

Wide Input Voltage Range: 3.1V to 20V

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0.6V to 5.5V Output Voltage

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Dual 5A or Single 10A Output Current

n

±1.5% Maximum Total Output Voltage Regulation

Error Over Load, Line and Temperature

n

Current Mode Control, Fast Transient Response

n

External Frequency Synchronization

n

Multiphase Parallelable with Current Sharing

n

Output Voltage Tracking and Soft-Start Capability

n

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Overvoltage Input and Overtemperature Protection

n

Power Good Indicators

n

6.25mm × 7.5mm × 3.22mm BGA package

n

General Purpose Point-of-Load Conversion

n

Telecom, Networking and Industrial Equipment

n

Medical Diagnostic Equipment

n

Test and Debug Systems

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19.1k

4705 TA01a

22µF

3.1V TO 20V

2.5V, 5A

100µF

1.8V, 5A

100µF

FB1

COMP1

COMP2

GND

LTM4705

PGOOD1

PGOOD2

RUN1

RUN2

INTVCC

SYNC/MODE

TRACK/SS1

TRACK/SS2

FREQ

30.1k

FB2

LOAD CURRENT (A)

0

1

2

3

4

5

60

65

70

75

80

85

90

95

100

4705 TA01b