OVERVIEW

The ISL8225M is a fully-encapsulated step-down switching power supply that can deliver up to 100W output power from a small 17mm square PCB footprint. The two 15A outputs may be used independently or combined to deliver a single 30A output. Designing a high-performance board mounted power supply has never been simpler -- only a few external components are needed to create a very dense and reliable power solution.

Automatic current sharing and phase interleaving allow up to six modules to be paralleled for 180A output capability. 1.5% output voltage accuracy, differential remote voltage sensing and fast transient response create a very high-performance power system. Built-in output overvoltage, overcurrent and over-temperature protection enhance system reliability.

The ISL8225M is available in a thermally-enhanced QFN package. Excellent efficiency and low thermal resistance permit full power operation without heat sinks or fans. In addition, the QFN package with external leads permits easy probing and visual solder inspection.

KEY FEATURES

  • Fully-encapsulated dual step-down switching power supply
  • Up to 100W output from a 17mmx17mm square PCB footprint
  • Dual 15A or single 30A output
  • Up to 95% conversion efficiency
  • 4.5V to 20V input voltage range
  • 0.6V to 7.5V output voltage range
  • 1.5% output voltage accuracy with differential remote sensing
  • Up to six modules may be paralleled to support 180A output current
  • Output overvoltage, overcurrent and over-temperature protection
  • Full power operation without heat sinks or fans
  • QFN package with exposed leads permits easy probing and visual solder inspection

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8225M
Input Voltage Min (V)
4.5
SYNCH Capability
Yes
Input Voltage Max (V)
20
Current Sharing
Yes
Output Voltage Min (V)
0.6
Tracking
Yes
Output Voltage Max (V)
7.5
Digital
No
Output Current Max (A)
30
Qualification Level
Standard
IQ
131 mA
Configuration
Normal
Peak Efficiency (%)
95
PVin_max (V)
Internal Linear Reg
POR
Yes
PVin_min (V)
Internal Linear Reg
Switching Freq. (max) (MHz)
1.5
Switching Frequency Range (MHz)
0.15 to 1.5
Switching Freq. (min) (MHz)
0.15
Temperature Range
-40 to +125
Control Type
Voltage Mode

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