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Manufacturer Part #


MIC2164 Series 3 mA 1.25 MHz Surface Mount Synchronous Buck Controller - MSOP-10

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Mfr. Name: Microchip
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Product Specification Section
Technical Attributes
Attributes Table
Supply Current-Max: 3mA
Supply Voltage: 3V to 28V
Frequency-Max: 1.25MHz
Duty Cycle-Min: 0%
Duty Cycle-Max: 66%
Package Style:  MSOP-10
Mounting Method: Surface Mount
Features & Applications

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.


  • Set-top box, gateways and routers.
  • Printers, scanners, graphic cards and video cards.
  • Telecommunication, PCs and servers.
  • Microprocessor core supply.
  • Low-voltage distributed power.
Pricing Section
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Factory Lead Time:
52 Weeks
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