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.

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

Applications
• Computing, networking and telecom infrastructure
equipment
• Industrial and medical equipment
• General purpose point-of-load (POL) power