DESCRIPTION
The LTP™8803-1A is a 160A step-down μModule® regulator
that provides microprocessor core voltage from 54V
power distribution architecture. It features remote configurability
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 digital
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 maximizes
flexibility and power density.
The LTP8803-1A preserves high efficiency at high conversion
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.

FEATURES
- High Efficiency at High Frequency
- Up to 91.8% Efficiency at 600kHz, 54VIN to 1.2VOUT
- PMBus-Compliant I2C Serial Interface
- Monitor Voltage, Current, Temperature, and Faults
- Internal EEPROM Fault Log Record
- Digitally Programmable Control Loop
- Program Voltage, Current Limits, Soft-Start/Soft-
Stop, Frequency, Synchronization and Phasing,
Power-Good, Warnings and Faults
- Wide Input Voltage Range: 45V to 65V
- Output Voltage Range: 0.5V to 1.5V
- Optimized for 45V to 65VIN to 1.2VOUT
- ±0.5% Maximum DC Output Error with Differential
Remote Voltage Sense
- ±3% Current Readback Accuracy
- Parallel and Current Share Multiple μModule ICs
- Pin Compatible with LTP8800-1A and LTP8800-4A
(Optimized for 0.8VOUT)
- 22mm × 24mm × 22mm Surface-Mounted Package

APPLICATIONS
- High Current Distributed Power Systems
- Servers, Network, and Storage Equipment
- Intelligent Energy Efficient Power Regulation