ISL8240M

Dual 20A/Single 40A Step-Down Power Module

OVERVIEW

The ISL8240M is a fully-encapsulated step-down switching power supply that can deliver up to 100W output power from a small 17mmx17mm PCB footprint. The two 20A outputs may be used independently or combined to deliver a single output of 40A. 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.

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 ISL8240M 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 PCB footprint
  • Dual 20A or single 40A output
  • Up to 94% conversion efficiency
  • 4.5V to 20V input voltage range
  • 0.6V to 2.5V output voltage range
  • 1.5% output voltage accuracy with differential remote sensing
  • Output overvoltage, overcurrent and over-temperature protection
  • QFN package with exposed leads permits easy probing and visual solder inspection

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL8240M
Basic Information
Production Status
Mass Production
iSim Model
YES
Input Voltage Min (V)
4.5
Input Voltage Max (V)
20
Output Voltage Min (V)
0.6
Output Voltage Max (V)
2.5
Output Current Max (A)
40
IQ
140 mA
Peak Efficiency (%)
94
POR
Yes
Switching Freq. (max) (MHz)
0.7
Switching Freq. (min) (MHz)
0.35
Control Type
Voltage Mode
SYNCH Capability
Yes
Current Sharing
Yes
Tracking
Yes
Digital
No
Qualification Level
Standard
Configuration
Normal
PVin_max (V)
Internal Linear Reg
PVin_min (V)
Internal Linear Reg
Switching Frequency Range (MHz)
0.35 to 0.7
Temperature Range
-40 to +125

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