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The ISL8270M is a 25A step-down DC/DC power supply module with integrated digital PWM controller, synchronous power switches, an inductor, and passives. Only bulk input and output capacitors are needed to finish the design. The 25A of continuous output current can be delivered without a need of airflow or a heatsink. The thermally enhanced HDA module is capable of dissipating heat directly into the PCB.

The ISL8270M uses ChargeMode™ control architecture, which responds to a transient load within a single switching cycle. The ISL8270M comes with a preprogrammed configuration for operating in a pin strap mode; output voltage, switching frequency, and device SMBus address can be programmed with external resistors. More configuration such as soft-start and fault limits can be easily programmed or changed via PMBus compliant serial bus interface. PMBus can be used to monitor voltages, current, temperatures, and fault status. The ISL8270M is supported by PowerNavigator™ software, a graphical user interface (GUI) that can be used to configure modules to a desired solution.

The ISL8270M is available in a 40-pin compact 17mmx19mm HDA module with very low profile height of 3.55mm, suitable for automated assembly by standard surface mount equipment. The ISL8270M is RoHS compliant by exemption.

Key Features

• Complete digital switch mode power supply
  • Wide VIN range: 4.5V to 14V
  • Programmable VOUT range: 0.6V to 5V
• PMBus compliant I2C communication interface
  • Programmable VOUT, margining, UV/OV, IOUT limit, soft-start/stop, sequencing, and external synchronization
  • Monitor: VIN, VOUT, IOUT, temperature, duty cycle, switching frequency and faults
• ChargeMode control architecture
• ±1.0% VOUT accuracy over line, load, and temperature
• Power-Good indicator
• Over-temperature protection
• Internal nonvolatile memory and fault logging
• Patented thermally enhanced HDA package

Applications

• Server, telecom, storage, and datacom
• Industrial/ATE, and networking equipment
• General purpose power for ASIC, FPGA, DSP, and memory