MIC2164C

The Micrel MIC2164/-2/-3/C are constant frequency, synchronous buck controllers featuring adaptive on-time control. The MIC2164/-2/-3/C are the first products in the new Hyper Speed Control™ family of buck controllers introduced by Micrel.

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.

Features
  • Hyper Speed Control™ architecture enables
  • High delta V operation (V HSD=28V and V OUT=0.8V)
  • 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 5.5Vwith ±1% (MIC2164/-2/-3) or ±3% (MIC2164C) feedback accuracy
  • Up to 95% efficiency
  • Foldback current limit and "hiccup" mode short-circuit protection
  • 6ms Internal soft start
  • Thermal shutdown
  • Safe start-up into pre-biased loads
  • -40°C to +125°C junction temperature range
  • Available in 10-pin MSOP package
Parameter
Parameter Name Value Value
Supported Topologies Sync. Buck Sync. Buck
Supported Outputs 1 1
Minimum Input Voltage (V) 3 3
Maximum Input Voltage (V) 28 28
Minimum Output Voltage (V) 0.8 0.8
Maximum Output Voltage (V) 5.5 5.5
Typical Tolerance (%) ±3 ±3
Duty Cycle Max (%) 0.87 0.87
Operating Frequency (Hz) 270K 270K
Soft Start True True
Internal Compensation True True
Internal Voltage Bias True True
Enable Pin True True
Current Limit / Short Circuit Protection True True
Input UVLO Typ (V) 2.7 2.7
Operating Supply Current (mA) 1.4 1.4
Iq Off (µA) 800 800
Package 10/MSOP 10/MSOP
Documents
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2164CYMM0.0245000.13560010MSOP3x3x1.0mmNiPdAue4
MIC2164CYMM-TR0.0245000.43118010MSOP3x3x1.0mmNiPdAue4
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