ISL8272M

50A Digital DC/DC PMBus Power Module

OVERVIEW

The ISL8272M is a 50A step-down PMBus compliant digital power module. Integrated in the module is a high performance digital PWM controller, dual-phase power MOSFETs, inductors, and the passives. This high efficiency power module is capable of delivering 50A without the need for airflow and heatsinks. The ISL8272M can be placed in a current sharing configuration with up to four modules in parallel to deliver 200A continuous current.

The ISL8272M operates with the ChargeMode™ control architecture, which responds to a transient load within a single switching cycle. The ISL8272M comes with operating in a pin strap mode; output voltage, switching frequency device, SMBus address, input UVLO, soft-start/stop and current sharing can be programmed through external resistors. More configuration such as fault limits, fault response, margining, and sequencing can be easily programmed using the PMBus interface. PMBus can be used to monitor voltages, currents, temperatures, and fault status. The ISL8272M is supported by the PowerNavigator™ software, a graphical user interface (GUI) that can be used to configure modules to a desired solution.

The ISL8272M is built in a compact (18mmx23mmx7.5mm) and low profile overmolded HDA package, suitable for automated assembly by standard surface mount equipment.

KEY FEATURES

  • Complete digital switch mode power supply
  • Wide input voltage range: 4.5V to 14V
  • Programmable output voltage range: 0.6V to 5V
  • PMBus compliant communication interface
  • Programmable VOUT, margining, UV/OV, UC/OC, UT/OT, soft-start/stop, sequencing and external synchronization
  • Monitor of VIN, VOUT, IOUT, temperature, duty cycle, switching frequency, power-good, and faults
  • Fast response ChargeMode control architecture
  • Multiphase current sharing with up to four modules
  • ±1.0% VOUT accuracy over line, load, and temperature
  • Internal nonvolatile memory and fault logging
  • Thermally enhanced HDA package

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8272M
Basic Information
Production Status
Mass Production
Input Voltage Min (V)
4.5
Input Voltage Max (V)
14
Output Voltage Min (V)
0.6
Output Voltage Max (V)
5
Output Current Max (A)
50
IQ
40 mA
Peak Efficiency (%)
96
POR
Yes
Switching Freq. (min) (MHz)
0.296
Switching Freq. (max) (MHz)
1.067
Control Type
Digital
SYNCH Capability
Yes
Current Sharing
Yes
Tracking
No
Digital
Yes
Qualification Level
Standard
Switching Frequency Range (MHz)
0.296 to 1.067 MHz
Temperature Range
-40 to +85

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