General Description
The Micrel MIC2166 is a synchronous adaptive on-time buck controller targeting high performance, cost sensitive applications such as set-top boxes, gateways, routers, computing peripherals, and telecom/networking equipment.

FEATUREs
• Hyper Speed Control™ architecture enables
    - High delta V operation (VIN=28V and VOUT=0.8V)
    - Smallest output capacitance
• Built-in 5V regulator for single-supply operation
• Any CapacitorTM 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
• Output down to +0.8V with ±1% accuracy
• 600kHz switching frequency
• Internal 5ms digital soft-start
• Thermal shutdown and hiccup current limit protection
• No external current-sense resistor required
• Pre-bias output safe
• 10-pin MSOP ePad package
• –40°C to +125°C junction temperature range

APPLICATIONs
• Set-top box, gateways, routers and DSL modems
• Printers, scanners, graphic and video cards
• Servers, PCs and processor core supply
• Low-Voltage Distributed Power