Microchip | MIC2164-3YMM

The MIC2164-3YMM is a constant frequency, synchronous buck controller featuring adaptive on-time control. The MIC2164/-2/-3 are the first products in the new Hyper Speed ControlTM family of buck controllers introduced by Micrel. The MIC2164/-2/-3 controllers operate over an input supply range of 3 V to 28 V, and are independent of the IC supply voltage.

The devices are capable of supplying 25 A output current. While the MIC2164 operates at 300 kHz, the MIC2164-2 operates at 600 kHz, and the MIC2164-3 operates at 1 MHz. A unique Hyper Speed ControlTM architecture allows for ultrafast transient response while reducing the output capacitance and also makes High VIN/Low VOUT operation possible. The MIC2164/-2/-3 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 controllers are available in a 10-pin MSOP (MAX1954A compatible) package with a junction operating range from –40°C to +125°C.

Key Features:

• Hyper Speed ControlTM architecture enables.
• High delta V operation (VIN=28 V and VOUT=0.8 V).
• Smaller output capacitors than competitors.
• 3 V to 28 V input voltage.
• Stable with zero-ESR output capacitor.
• 25 A output current capability.
• 300 kHz/600 kHz/1MHz switching frequency.
• Adaptive on-time mode control.
• Output down to 0.8 V with ±1% FB accuracy.
• Up to 95% efficiency.
• Foldback current limit and “hiccup” mode short-circuit protection.
• 6 ms Internal soft start.
• Thermal shutdown.
• Pre-bias output safe.
• –40°C to +125°C junction temperature range.
• Available in 10-pin MSOP package.

Applications:

• Set-top box, gateways and routers.
• Printers, scanners, graphic cards and video cards.
• Telecommunication, PCs and servers.
• Microprocessor core supply.
• Low-voltage distributed power.