Ultrathin Dual 14A or Single 28A μModule Regulator with Digital Power System Management

The LTM4686B is a dual 14A (17A peak) or single 28A (34A peak) step-down μModule® (micromodule) DC/ DC regulator with 39ms 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 LTM4686B is comprised of fast analog control loops, precision mixed-signal circuitry, EEPROM, power MOSFETs, inductors and supporting components. A video on ultrathin module products is available on the website.

The LTM4686B’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, temperature, uptime and peak values are readable. Custom configuration of the EEPROM contents is not required. Pin-strap resistors configure start-up settings. The LTpowerPlay® GUI, DC1613 USB-to-PMBus converter, DC2086 programming adapter and demo kits are available.

Pb-free and RoHS compliant, the LTM4686B is available in a 16mm × 11.9mm × 1.82mm LGA package.

APPLICATIONS

* System Optimization in Prototype and Production

* Dual, Fast, Analog Loops with Digital Interface for Control and Monitoring

* Input Voltage Range: 4.5V to 5.75V Standalone, 2.375V to 5.75V with Aux 5V Bias

* Output Voltage Range: 0.5V to 3.6V

* ±0.5% Maximum DC Output Error Over Temperature

* 14A DC Typical, 17A Peak Output Current, per Channel

* ±10% Current Readback Accuracy at 10A 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