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LTM4675 - Dual 9A or Single 18A μModule (Power Module) Regulator with Digital Power System Management

The LTM®4675 is a dual 9A or single 18A step-down μModule® (power module) DC/DC regulator with 70ms turn-on time. It features remote configurability and telemetry-monitoring of power management parameters over PMBus— an open standard I2C-based digital interface protocol . The LTM4675 is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components.

The LTM4675’s 2-wire serial interface allows outputs to be margined, tuned and ramped up and down at programmable slew rates with sequencing delay times. Input and output currents and voltages, output power, temperatures, uptime and peak values are readable. Custom configuration of the EEPROM contents is not required. At start-up, output voltages, switching frequency, and channel phase angle assignments can be set by pin-strapping resistors. The LTpowerPlay™ GUI and DC1613 USB-to-PMBus converter and demo kits are available.

The LTM4675 is offered in a 16mm × 11.9mm × 3.51mm BGA package available with SnPb or RoHS compliant terminal finish.

Features Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring Wide Input Voltage Range: 4.5V to 17V Output Voltage Range: 0.5V to 5.5V ±0.5% Maximum DC Output Error Over Temperature ±2.5% Current Readback Accuracy at 9A Load 400kHz PMBus-Compliant I2C Serial Interface Integrated 16-Bit ΔΣ ADC Supports Telemetry Polling Rates Up to 125Hz Constant Frequency Current Mode Control Parallel and Current Share Multiple Modules All 7-Bit Slave Addresses Supported Drop-In Pin-Compatible to Dual 13A LTM4676A andDual 18A LTM4677 16mm × 11.9mm × 3.51mm BGA Package Download LTpowerPlay Software Input and Output Voltages, Currents, and Temperatures Running Peak Values, Uptime, Faults and Warnings Onboard EEPROM Fault Log Record Output Voltage, Voltage Sequencing and Margining Digital Soft-Start/Stop Ramp OV/UV/OT, UVLO, Frequency and Phasing Typical Application

Applications System Optimization in Prototype and Production Packaging

Demo Boards