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 of3.55mm, suitable

for automated assembly by standard surface mount

equipment. The ISL8270M is RoHS compliant by exemption.

特性 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