ISL8240M Datasheet, PDF (1/31 Pages) Intersil Corporation – Dual 20A or single 40A output

DATASHEET
Dual 20A/Single 40A Step-Down Power Module
ISL8240M
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.
Related Literature
AN1922, “ISL8240MEVAL4Z Dual 20A/Optional 40A
Cascadable Evaluation Board Setup Procedure”
AN1923, “ISL8240MEVAL3Z 40A, Single Output Evaluation
Board Setup Procedure”
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
4.5V TO 20V
V_IN
5x22µF
OFF ON
4.7µF
R_SYNC
237kΩ
VIN1
VOUT1
VIN2
VOUT2
EN/FF1
VSEN1+ _RSET
EN/FF2
VSEN2-
ISL8240M
VSEN1-
VMON1
1.5kΩ
1.0VAT 40A
V_OUT
1kΩ
9x100µF
VCC
SYNC
VMON2
COMP1
COMP2
470pF
NOTE: All pins not shown are floating
FIGURE 1. COMPLETE 40A STEP-DOWN POWER SUPPLY
17mm
17mm
7.5mm
FIGURE 2. SMALL FOOTPRINT WITH HIGH POWER DENSITY
January 7, 2015
1
FN8450.2
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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