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Part Number:MIC2166
Manufacturer:Microchip
Category:Power Management
Availability:4312
Description:Hyper Speed Control™ architecture enables High delta V operation (V IN=28V and V OUT=0.8V) Smallest output capacitance Built-in 5V regulator for single-supply operation Any Capacitor™ stable Zero ESR to high ESR Power Good (PGOOD) output Input voltage range: 4.5V to 28V 5µA typical shutdown current 25A output current drive capability Adjustable output from +0.8V to 5.5V with ±1% accuracy 600kHz switching frequency Internal 5ms digital soft-start Thermal shutdown and "hiccup" current limit protection No external current-sense resistor required Safe start-up into pre-biased loads10-pin MSOP ePad package -40°C to +125°C junction temperature range
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Detailed Product Description
The MIC2166 is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipment. The MIC2166 operates over a supply range of 4.5V to 28V. It has an internal linear regulator which provides a regulated 5V supply to power the internal control circuitry. MIC2166 operates at a constant 600kHz switching frequency and can be used to drive up to 25A of output current. The output voltage is adjustable from 0.8V to 5.5V. A unique Hyper Speed Control™ architecture enables ultra-fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible. A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from over heating. Also, a soft-start feature is provided to reduce the inrush current. Short current sensing on the bottom MOSFET with hiccup mode operation ensures protection in case of an output short circuit. Further, the MIC2166 includes an EN pin to shut down the converter and a Power-Good (PGOOD) pin to allow simple sequencing. The MIC2166 is available in a 10 pin MSOP ePad package with a junction operating termperature range from -40°C to +125°C.
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