LTP8803-1A

1

Rev. 0

For more information www.analog.com

Document Feedback

TYPICAL APPLICATION

FEATURES

DESCRIPTION

160A DC/DC Power µModule Regulator

with PMBus Interface

The LTP™8803-1A is a 160A step-down μModule® regula-

tor that provides microprocessor core voltage from 54V

power distribution architecture. It features remote config-

urability and telemetry monitoring of power management

parameters over PMBus—an open standard I2C-based

digital interface protocol.

The LTP8803-1A is comprised of a programmable digi-

tal control system with precision mixed-signal circuitry,

EEPROM, power MOSFETs, planar transformer, inductors,

and supporting components. Its high level of integration

minimizes component count and design time and maxi-

mizes flexibility and power density.

The LTP8803-1A preserves high efficiency at high conver-

sion ratios by utilizing a resonant switching architecture

that eliminates high voltage switching losses.

The LTP8803-1A is available in a 22mm × 24mm × 22mm

surface-mounted open frame package.

APPLICATIONS

n

High Efficiency at High Frequency

n

Up to 91.8% Efficiency at 600kHz, 54VIN to 1.2VOUT

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 1.5V

n

Optimized for 45V to 65VIN to 1.2VOUT

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

Pin Compatible with LTP8800-1A and LTP8800-4A

(Optimized for 0.8VOUT)

n

22mm × 24mm × 22mm Surface-Mounted Package

n

High Current Distributed Power Systems

n

Servers, Network, and Storage Equipment

n

Intelligent Energy Efficient Power Regulation

All registered trademarks and trademarks are the property of their respective owners.

C5: 560 F EEFGX0D561R

C4: GRM32EC80J107ME20L

C3: C1608X7S0J106M080AC

C1: EEEFK2A220P

C2: GRM31CR72A225KA73L

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

LTP8803-1A

88031a TA01a

7V0

3V3

VIN

45V TO 65V

7V

3V3

GND

VOUT

1.2V

160A

C3

10µF

×18

210Ω

1.40k

1.00k

100pF

ADD

7.5Ω

C4

100µF

×8

C5

560µF

×10

ISHARE

VIN = 54V

VOUT = 1.2V

fSW = 602kHz

500LFM

EFFICIENCY

POWER LOSS

LOAD CURRENT (A)

0

20

40

60

80 100 120 140 160

65

70

75

80

85

90

95

2

5

8

11

14

17

20

88031a TA01b

1.2V, 160A Output DC/DC μModule Regulator with PMBus Serial Interface

Efficiency and Power Loss

vs Output Current