General Description

Micrel’s MIC45208 is a synchronous step-down regulator module, featuring a unique adaptive ON-time control architecture. The module incorporates a DC-to-DC controller, power MOSFETs, bootstrap diode, bootstrap capacitor, and an inductor in a single package; simplifying the design and layout process for the end user.

Features

• No compensation required

• Up to 10A output current

• >93 peak efficiency

• Output voltage: 0.8V to 5.5V with ±1 accuracy

• Adjustable switching frequency from 200kHz to 600kHz

• Enable input and open-drain power good (PG) output

• Hyper Speed Control (MIC45208-2) architecture enables fast transient response

• HyperLight Load (MIC45208-1) improves light load efficiency

• Supports safe startup into pre-biased output

• CISPR22, Class B compliant

• –40°C to +125°C junction temperature range

• Thermal-shutdown protection

• Short-circuit protection with hiccup mode

• Adjustable current limit

• Available in 52-pin 10mm × 10mm × 4mm QFN package

Applications

• High power density point-of-load conversion

• Servers, routers, networking, and base stations

• FPGAs, DSP, and low-voltage ASIC power supplies

• Industrial and medical equipment