LTP8800-4A

1

Rev. A

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3.3k

3.3k

5k

10k

VIN

SYNC

CTRL

SDA

SMBALERT

SMBALERT

SCL

VS–

VS+

VOUT

C1

47µF

C2

4.7µF

3V3

SCL

SDA

ON/OFF CTRL

SYNC CLOCK

LTP8800-4A

88004a TA01a

7V0

3V3

VIN

45V TO 65V

7V

3V3

GND

VOUT

0.8V

200A

C3

10µF

×18

210Ω

1.21k

2.00k

100pF

ADD

7.5Ω

C4

100µF

×8

C5

560µF

×16

ISHARE

C5: EEFGX0D561R

C4: GRM32EC70G107ME15L

C3: C1608X7S0J106M080AC

C1: EEE-FK2A470AQ

C2: GRM31CC72A475KE11L

VIN = 54V

VOUT = 0.8V

fSW = 549kHz

500LFM

EFFICIENCY

POWER LOSS

LOAD CURRENT (A)

0 20 40 60 80 100 120 140 160 180 200

65

70

75

80

85

90

95

1

5

9

13

17

21

25

88004a TA01b

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

200A DC/DC µModule Regulator

with PMBus Interface

The LTP™8800-4A is a 200A step-down μModule® regula-

tor that provides microprocessor core voltage from 54V

power distribution architecture. LTP8800-4A features

remote configurability and telemetry monitoring of power

management parameters over PMBus—an open stan-

dard I2C-based digital interface protocol. The LTP8800-4A

is comprised of a programmable digital control system

with precision mixed-signal circuitry, EEPROM, power

MOSFETs, planar transformer, inductors, and supporting

components. LTP8800-4A high level of integration mini-

mizes component count and design time and maximizes

flexibility and power density. The LTP8800-4A preserves

high efficiency at high conversion ratios by utilizing a res-

onant switching architecture that eliminates high voltage

switching losses. The LTP8800-4A is available in a 22mm

× 24mm × 22mm surface mounted open frame package.

54V To Core

APPLICATIONS

n

High Efficiency at High Frequency

n

Up to 90.5% Efficiency at 550kHz,

54VIN to 0.8VOUT

n

PMBus-Compliant I2C Serial Interface

n

Monitor Voltage, Current, Temperature and Faults

n

Internal EEPROM Fault Log Record

n

Digitally Programmable Control Loop

n

Program Voltage, Current Limits, Soft-Start/Soft-

Stop, Frequency, Synchronization and Phasing,

Power-Good, Warnings and Faults

n

Wide Input Voltage Range: 45V to 65V

n

Output Voltage Range: 0.5V to 1.1V

n

±0.5% Maximum DC Output Error with Differential

Remote Voltage Sense

n

±3% Current Readback Accuracy

n

Parallel and Current Share Multiple μModule ICs

n

22mm × 24mm × 22mm Surface-Mount Package

n

High Current Distributed Power Systems

n

Servers, Network, and Storage Equipment

n

Intelligent Energy Efficient Power Regulation

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Efficiency and Power Loss

vs Output Current