MICROCHIP MIC2164YMM

The Micrel MIC2164/-2/-3/C are constant-frequency, synchronous buck controllers featuring adaptive on-time control. The MIC2164/-2/-3/C controllers operate over an input supply range of 3V to 28V, and are independent of the IC supply voltage. The devices are capable of supplying 25A output current. While the MIC2164 operates at 300kHz, the MIC2164-2 operates at 600kHz, and the MIC2164-3 operates at 1MHz. A unique Hyper Speed Control architecture allows for ultra-fast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible. The MIC2164/-2/-3/C controllers utilizes an architecture which is adaptive TON ripple controlled. A UVLO feature is provided to ensure proper operation under power-sag conditions to prevent the external power MOSFET from overheating. A soft start feature is provided to reduce the inrush current. Foldback current limit and “hiccup” mode short-circuit protection ensure FET and load protection. The MIC2164/-2/-3/C controllers are available in a 10-pin MSOP (MAX1954A-compatible) package with a junction operating range from -40°C to +125°C.

• Hyper Speed Control architecture enables high delta V operation (VHSD = 28V and VoUT = 0.8V) and smaller output capacitors than competitors
• 3V to 28V input voltage
• Any Capacitor stable (Zero ESR to high ESR)
• 25A output current capability
• 300kHz/600kHz/1MHz switching frequency
• Adaptive on-time mode control
• Adjustable output from 0.8V to 5.5V with ±1% (MIC2164/-2/-3) or ±3% (MIC2164C) FB accuracy
• Up to 95% efficiency
• Foldback current-limit, “hiccup” mode short-circuit protection, thermal shutdown, and safe pre-bias startup
• 6ms Internal soft start
• -40°C to +125°C junction temperature range
• Available in 10-pin MSOP package

• Set-top box, gateways and routers
• Printers, scanners, graphic cards and video cards
• Telecommunication, PCs and servers