LTM4627 データシートの表示（PDF） - Linear Technology

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LTM4627

15A DC/DC µModule Regulator

Linear Technology 

FEATURES

n Complete 15A Switch Mode Power Supply

n Wide Input Voltage Range: 4.5V to 20V

n 0.6V to 5V Output Range

n ±1.5% Total DC Output Error

n Differential Remote Sense Amplifier for Precision

Regulation

n Current Mode Control/ Fast Transient Response

n Frequency Synchronization

n Parallel Current Sharing (Up to 60A)

n Selectable Pulse-Skipping or Burst Mode® Operation

n Soft-Start/Voltage Tracking

n Up to 93% Efficiency (12VIN, 3.3VOUT)

n Overcurrent Foldback Protection

n Output Overvoltage Protection

n Small Surface Mount Footprint, Low Profile

15mm × 15mm × 4.32mm LGA and

15mm × 15mm × 4.92mm BGA Packages

APPLICATIONS

n Telecom Servers and Networking Equipment

n ATCA and Storage Cards

n Industrial Equipment

n Medical Systems

LTM4627

15A DC/DC µModule

Regulator

DESCRIPTION

The LTM®4627 is a complete 15A output high efficiency

switch mode DC/DC power supply. Included in the pack-

age are the switching controller, power FETs, inductor

and compensation components. Operating over an input

voltage range from 4.5V to 20V, the LTM4627 supports an

output voltage range of 0.6V to 5V, set by a single external

resistor. Only a few input and output capacitors are needed.

Current mode operation allows precision current sharing

of up to four LTM4627 regulators to obtain 60A output.

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 track-

ing for supply rail sequencing.

The LTM4627 is offered in thermally enhanced 15mm ×

15mm × 4.32mm LGA and 15mm × 15mm × 4.92mm BGA

packages. The LTM4627 is available with SnPb (BGA) or

RoHS compliant terminal finish.

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

are registered trademarks and LTpowerCAD is a trademark 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.

TYPICAL APPLICATION

VIN

4.5V TO 16V

1.2V, 15A DC/DC µModule® Regulator

22µF

16V

×3 10k

150pF

0.1µF

100k

* SEE TABLE 4

** SEE TABLE 1

VIN EXTVCC INTVCC PGOOD

COMP

VOUT

TRACK/SS

VOUT_LCL

LTM4627

RUN

DIFF_OUT

fSET

MODE_PLLIN

VOSNS+

VOSNS–

VFB

SGND GND

RFB**

60.4k

+

82pF

470µF

6.3V

VOUT

1.2V

15A

100µF*

6.3V

4627 TA01a

Efficiency vs Load Current

95

90

85

80

75

70

65

60

55

12VIN, 1.2VOUT

5VIN, 1.2VOUT

50

0 2 4 6 8 10 12 14 16

LOAD CURRENT (A)

4627 TA01b

For more information www.linear.com/LTM4627

4627fc

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