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LTM4636-1 - 40A μModule Regulator with Overvoltage/ Overtemperature Protection

The LTM®4636-1 is a 40A step-down μModule® (power module) switching regulator with stacked inductor as a heat sink for heat dissipation and cooler operation in a small package. The LTM4636-1 detects overtemperature and input/output overvoltage conditions and can trip an upstream power supply or circuit breaker to protect itself and its load. The exposed inductor as a heat sink permits direct contact with airflow from any direction. The LTM4636-1 can deliver 40W (12VIN, 1VOUT, 40A, 200LFM) with only 40°C rise over the ambient temperature. Full-power 40W is delivered up to 83°C ambient and half-power 20W is supported at 110°C ambient.

The LTM4636-1 operates at 92%, 90% and 88% efficiency delivering 15A, 30A and 40A, respectively, to a 1V load (12VIN). The μModule regulator is scalable where four in current sharing deliver 160W with only 40°C rise and 88% efficiency (12VIN, 1VOUT, 400LFM). The LTM4636-1 is offered in 16mm × 16mm × 7.07mm BGA package.

Features Overtemperature, Input/Output Overvoltage Protection Trips Upstream Power Source or Circuit Breaker Stacked Inductor Acts as Heat Sink Wide Input Voltage Range: 4.7V to 15V 0.6V to 3.3V Output Voltage Range ±1.3% Total DC Output Voltage Error (–40°C to 125°C) Differential Remote Sense Amplifier for Precision Regulation Current Mode Control/Fast Transient Response Frequency Synchronization Parallel Current Sharing (Up to 240A) 88% Efficiency (12VIN, 1VOUT) at 40A Overcurrent Foldback Protection Overtemperature Shutdown 16mm × 16mm × 7.07mm BGA Package Typical Application

Applications Telecom Servers and Networking Equipment Industrial Equipment and Medical Systems Packaging

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