General Description
The Micrel MIC2174 is a fixed frequency, synchronous buck controller featuring adaptive on-time control. The MIC2174 operates over an input supply range of 3V to 40V, switches at a constant frequency of 300kHz and is capable of driving 25A of output current. The output voltage is adjustable down to 0.8V.

FEATUREs
• Hyper Speed Control™ architecture enables
    – High delta V operation (VIN=40V and VOUT=0.8V)
    – Smaller output capacitors than competitors
• 3V to 40V input voltage
• Stable with zero-ESR output capacitor
• 300kHz switching frequency
• Output down to 0.8V with ±1% FB accuracy
• Up to 94% efficiency
• Foldback current limit and “hiccup” mode short-circuit protection
• 6ms Internal soft start
• Thermal shutdown
• Pre-bias output safe
• –40°C to +125°C junction temperature range
• Available in 10-pin MSOP package

APPLICATIONs
• Wide input power supply
• Industrial Equipments
• Distributed DC power systems
• Automotive applications
• PCs and servers