MIC2169A Datasheet | Micrel Semiconductor

Micrel 500k Hz PWM Synchronous Buck Control IC General Description The MIC2169A is a high-efficiency, simple to use 500k Hz PWM synchronous buck control IC housed in a small MSOP10 package. The MIC2169Aallows pact DC/DC solutions with a minimal external ponent count and cost. The MIC2169A operates from a 3V to 14.5V input, without the need of any additional bias voltage. The output voltage can be precisely regulated down to 0.8V. The adaptive all N‑Channel MOSFET drive scheme allows efficiencies over 95% across a wide load range. The MIC2169A senses current across the high-side NChannel MOSFET, eliminating the need for an expensive and lossy current-sense resistor. Current limit accuracy is maintained by a positive temperature coefficient that tracks the increasing RDS(ON) of the external MOSFET. Further cost and space are saved by the internal in-rush-current limiting digital soft-start. The MIC2169A is available in a 10-pin MSOP package, with a wide junction operating range of - 40°C to +125°C. All support documentation can be found on Micrel’s web site at .micrel.. Features - 3V to 14.5V input voltage range - Adjustable output voltage down to 0.8V - Up to 95% efficiency - 500k Hz PWM operation - Adjustable current limit senses high-side N-Channel MOSFET current - No external current-sense resistor - Adaptive gate drive increases efficiency - Overvoltage protection protects the load in fault conditions - Dual mode current limit speeds up recovery time - Hiccup mode short-circuit protection - Internal soft-start - Dual function P and EN pin allows low-power shut- down - Small size MSOP 10-lead package Applications - Point-of-load DC/DC conversion - Set-top boxes - Graphic cards - LCD power supplies - Tele power...