LTM4611



4611f

Typical applicaTion

DescripTion

µModule Regulator

The LTM4611 is a high density 15A output, switch mode

DC/DC buck converter power supply capable of operating

from very low voltage input supplies. Included in the pack-

age are the buck switching controller, power FETs, induc-

tor and loop-compensation components. The LTM4611

delivers up to 15A continuous current at high efficiency

voltage is set between 0.8V and 5V by a resistor. Only a

few 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, multiphase/current sharing

operation, Burst Mode operation and output voltage

tracking for supply rail sequencing.

The LTM4611 is available in a thermally enhanced 15mm

× 15mm × 4.32mm LGA package. The LTM4611 is PB-free

and RoHS compliant.

FeaTures

applicaTions

n

Complete Switch Mode Power Supply

n

Input Voltage Range: 1.5V to 5.5V

n

15A DC Output

n

Output Voltage Range: 0.8V to 5V

n

±1.5% Total DC Output Error

n

Differential Remote Sensing for Precision

Regulation

n

Current Mode Control/ Fast Transient Response

n

Overcurrent Foldback Protection

n

n

Frequency Synchronization

n

n

Soft-Start/Voltage Tracking

n

Up to 94% Efficiency

n

Output Overvoltage Protection

n

Small 15mm

× 15mm × 4.32mm LGA Package

n

Telecom Servers and Networking Equipment

n

Storage and ATCA Cards

n

General Purpose Point of Load Regulation

Efficiency vs Load Current

L

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

registered trademarks of Linear Technology Corporation. All other trademarks are the property

of their respective owners. Protected by U.S. Patents, including 5481178, 5847554, 6580258,

6304066, 6476589, 6774611, 6677210.

TRACK/SS

RUN

MODE_PLLIN

PGOOD

LTM4611

22µF

3

0.1µF

100µF*

4

STEP-DOWN

15A

*SEE TABLE 5

**SEE TABLE 1

4611 TA01

1.5V TO 5.5V

SGND GND

**

LOAD CURRENT (A)

0

78

80

84

86

88

10

96

4611 TA01b

82

5

15

90

92

94