Dual 9A or Single 18A μModule Regulator with Digital Power System Management

The LTM4675 is a dual 9A or single 18A step-down μModule® (micromodule) DC/DC regulator with 40ms 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.

APPLICATIONS

* System Optimization in Prototype and Production

* 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 ∆Σ 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 and Dual 18A LTM4677

* 16mm × 11.9mm × 3.51mm BGA Package