June 11, 2015 – Linear Technology Korea (CEO Hong Sa-gwak) announced the launch of the LTM4675, a dual 9A or 18A µModule® (micromodule) step-down DC/DC regulator with PMBus serial digital interface in a compact 11.9mm x 16mm x 3.51mm BGA package. Through an I2C-based interface, system designers and remote operators can issue commands and monitor the system's power status and consumption. Calibrated over a temperature range of –40°C to 125°C with guaranteed range, the output DC voltage accuracy is ±0.5% for line and load regulation, and provides a maximum ±2.5% load current readback accuracy.

The LTM4675 includes supporting components such as EEPROM, power MOSFET, and inductor. This product features fast, dual analog control loops and precision mixed-signal circuitry. The LTM4675 is drop-in-pin compatible with the higher-power dual 13A LTM4676A product (16mm x 16mm BGA), enabling layout changes to be avoided and allowing system designers to easily switch between devices during the prototype phase. In other words, if power requirements change during the board prototype period, there is no need to redesign the power circuit. The LTM4675 can be used in applications within optical transmission systems, datacom and telecom switches and routers, industrial test equipment, robotics, RAID, and enterprise systems, where functions such as energy cost, cooling, and maintenance are critical and must be continuously and precisely monitored.

The LTM4675 operates from 4.5V to 17V input supply and steps down two outputs to VIN over a range of 0.5V to 5.5V maximum. The two channels can share current to deliver up to 18A (9A+9A from one output). Power-up turn-on time is 70ms. To evaluate the LTM4675 performance, a free LTpowerPlay™ GUI-based development system can be downloaded, and a USB-to-PMBus converter and demo kit are available. With maximum ±0.5% DC output error at room temperature, ±2.5% current readback accuracy, integrated 16-bit delta-sigma ADC, and EEPROM, the LTM4675 combines precision mixed-signal data acquisition with industry-leading analog switching regulator performance. At startup, output voltage, switching frequency, and channel phase angle assignment can be set via pin-strapping resistors.

The LTM4675 internal operating temperature range is –40°C to 125°C. At 1,000 unit quantities, the price is $24 per unit. For detailed information, refer to www.linear.com/product/LTM4675.

Dual 9A or Single 18A µModule Regulator with Digital Interface

Product Features: LTM4675

-Dual 9A or Single 18A µModule with power system management functions

-Regulator with fast analog loop & PMBus interface

-±2.5% current readback accuracy, maximum ±0.5% DC output voltage error at room temperature

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

-11.9 x 16 x 3.51mm BGA package including inductor, power MOSFET, DC/DC converter data acquisition system & EEPROM