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