July 1, 2015 – Linear Technology Korea (CEO Hong Sa-gwak) announced the launch of the LTM4676A, a maximum 100A μModule® (micromodule) step-down DC/DC regulator capable of sharing dual 13A or single 26A current using a PMBus serial digital interface. Through the digital interface, system designers and remote operators can command and supervise the system's power conditions and consumption conditions.

The LTM4676A µModule regulator features a 70ms power-up time, 8ms ADC telemetry update speed, and an I2C serial interface compliant with 400kHz PMBus. Through these enhanced capabilities, the product enables faster system boot times and faster data collection functionality in applications with maximum power-up time requirements such as PCIe-based platforms. End applications include optical transport systems, datacom and telecom switches and routers, industrial test equipment, robotics, RAID as well as cost-sensitive enterprise systems such as electrical facilities, cooling systems, and maintenance systems that require continuous operation and precise measurement.

The LTM4676A comprises EEPROM, power MOSFETs, inductors, and supporting components. The product features high-speed dual analog control loops and precision mixed-signal circuitry, packaged in a 16mm x 16mm x 5.01mm BGA (ball grid array).

In addition to delivering power at the point-of-load (PoL), the LTM4676A provides configuration and telemetry monitoring of power and power management parameters via PMBus, an open-standard I²C-based digital serial interface protocol. The LTM4676A operates from 4.5V ~ 17V input power and steps down VIN to two outputs in the 0.5V ~ 5.4V range. The two channels can share current capable of delivering up to 26A (13A + 13A as a single output). Four LTM4676A devices can be multiphased to share output current up to a maximum of 100A.

To evaluate the LTM4676A's performance, the freely downloadable LTpowerPlay™ GUI (graphic user interface), USB-to-PMBus converter, and demo kit (DC1811B-KIT) are available. With ±0.5% maximum DC output accuracy across operating temperature, ±2.5% current readback accuracy, integrated 16-bit delta-sigma ADC, and EEPROM, the LTM4676A integrates industry-leading analog switching regulator performance with precision mixed-signal data acquisition functionality. At startup, output voltage, switching frequency, and channel phase adjustment functions can be configured through pin-strapping registers.

The LTM4676A internal operating temperature range is –40°C ~ 125°C. Pricing is set at $33.95 per unit based on a quantity of 1,000 units. For detailed information, refer to www.linear.com/product/LTM4676A.

Dual 13A DPSM µModule Regulator

Product Features: LTM4676A

·Dual 13A or single 26A μModule shareable up to 100A maximum

·High-speed analog loop regulator & digital interface for remote power system management

·±2.5% current readback accuracy; ±0.5% maximum DC output voltage error across operating temperature

·70ms power-up & 8ms ADC telemetry update speed

·16mm x 16mm x 5.01mm BGA package including inductor, power MOSFET, DC/DC converter, data acquisition system & EEPROM