MIC4950

The MIC4950 is a high-efficiency, 5A synchronous buck regulator with ultra-fast transient response perfectly suited for supplying processor core and I/O voltages from a 5V or 3.3V bus. The MIC4950 provides a switching frequency up to 3.3MHz while achieving peak efficiencies up to 95%. An additional benefit of high-frequency operation is very low output ripple voltage throughout the entire load range with the use of a small output capacitor. The MIC4950 is designed for use with a very small inductor, down to 1μH, and an output ceramic capacitor as small as 10μF without the need for external ripple injection. A wide range of output capacitor types and values can also be accommodated.

The MIC4950 supports safe start-up into a pre-biased output.

The MIC4950 is available in 8-pin SOIC and 10-pin 3mm — 4mm DFN packages with an operating junction temperature range from -40°C to +125°C. The MIC4930 is pin-to-pin compatible with the 5A-rated MIC4950YFL.

Features
  • Input voltage: 2.7V to 5.5V
  • 5A output current
  • Up to 95% efficiency
  • Up to 3.3MHz operation
  • Safe start-up into a pre-biased output
  • Power Good output
  • Ultra-fast transient response
  • Low output voltage ripple
  • Low RDS(ON) integrated MOSFET switches
  • 0.01μA shutdown current
  • Thermal shutdown and current limit protection
  • Output voltage as low as 0.7V
  • 8-pin SOIC and 3mm — 4mm DFN-10L
  • -40°C to +125°C junction temperature range
Parameter
Parameter Name Value Value
Regulator Type Step Down (Buck) Step Down (Buck)
# of Outputs 1 1
Input Voltage Range Min (V) 2.7 2.7
Input Voltage Range Max (V) 5.5 5.5
Output Voltage Range Min (V) 0.7 0.7
Output Current (A) max 5 5
Quiescent Current (mA) typ 0.8 0.8
Switching Frequency (kHz) 3300 3300
Synchronous Rectifier Yes Yes
Operating Temp Range -40 to 125 -40 to 125
Vfb (V) 0.625 0.625
SHUTDOWN Current (µA) (Typ) 0.01 0.01
Documents
MIC4950 Data SheetData Sheets11/05/20151134KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC4950YFL-TR10VDFN-40C to +125CT/R**********
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC4950YFM-T50.8524578SOIC3.9mmNiPdAue4
MIC4950YFM-TR0.8524578SOIC3.9mmNiPdAue4
MIC49500-0.9WR0.6666677SPAK-Matte Tine3
MIC49500-1.2WR0.6666677SPAK-Matte Tine3
MIC49500-0.9WR-TR1.4400007SPAK-Matte Tine3
MIC49500WR0.6666677SPAK-Matte Tine3
MIC49500-1.2WR-TR1.4400007SPAK-Matte Tine3
MIC49500WR-TR1.4400007SPAK-Matte Tine3
MIC4950YFL-TR0.00000010VDFN3x4x0.9mmNiPdAue4
MIC4950YFL-T50.00000010VDFN3x4x0.9mmNiPdAue4
MIC4950 Data Sheet MIC4950
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