MIC2165 Datasheet | Micrel Semiconductor

Description The Micrel MIC2165 is a synchronous adaptive on-time buck controller targeting high-performance, cost-sensitive applications such as set-top boxes, gateways, routers, puting peripherals, and tele/networking equipment. The MIC2165 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. MIC2165 operates at a constant 600k Hz 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 current limiting ensures protection in case of an output short circuit. Further, the MIC2165 includes an EN pin to shut down the converter and a Power Good (PGOOD) pin to allow simple sequencing. The MIC2165 is available in a 10-pin MSOP e Pad package with a junction operating temperature ranging from - 40°C to +125°C. All support documentation can be found on Micrel’s web site at: .micrel.. Features - Hyper Speed Control™ architecture enables - High VIN Low VOUT operation (VIN=28V & VOUT=0.8V) - Small output capacitance - Hyper Light Load® Efficiency - Built-in 5V regulator for single-supply operation - Any Capacitor TM stable - Zero ESR to high ESR - Power-Good 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% FB Accuracy - 600k Hz switching frequency - Internal 5ms digital Soft Start - Thermal shutdown and hiccup current-limit protection - No external current-sense resistor...