LTC3870IUF-1#PBF

LINEAR TECHNOLOGY LTC3870IUF-1#PBF DC-DC Controller, Buck Step Down, 4.5V to 60V, 2 Output, 1MHz, QFN-24

The is a PolyPhase step-down slave controller for digital power system management in 24 pin QFN package. The LTC3870-1 is a PolyPhase step-down slave controller specially designed for multiphase operation with LTC"s digital power system management DC/DC controllers. It provides a small and cost effective solution for supplying very large currents by cascading it with a LTC3887-1 controller. Peak current mode architecture provides the LTC3870-1 with excellent current sharing from phase to phase and from chip to chip. Coherently working with the LTC3887-1, the LTC3870-1 does not require additional I2C addresses and it supports all programmable features as well as fault protection. The constant switching frequency can be synchronized to an external clock from the LTC3887-1 over a range of 100KHz to 1MHz. Typical applications include high power distributed power systems and telecom systems.

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Input voltage range from 4.5V to 60V

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Output voltage range from 0.5V to 14V

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Supply current is 1.1mA

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Operates with power blocks, DrMOS or external gate drivers and MOSFETs

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Cascade with multiple chips for very large current applications

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Accurate PolyPhase current sharing

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EXTVCC capable of 5V to 14V input

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Pin programmable CCM/DCM operation

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Pin programmable phase-shift control

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Operating temperature range from -40°C to 125°C