MIC2171

The MIC2171 is a complete 100kHz SMPS current-mode controller with an internal 65V 2.5A power switch.

Although primarily intended for voltage step-up applications, the floating switch architecture of the MIC2171 makes it practical for step-down, inverting, and Cuk configurations as well as isolated topologies.

Operating from 3V to 40V, the MIC2171 draws only 7mA of quiescent current, making it attractive for battery operated supplies.

The MIC2171 is available in a 5-pin TO-220 or TO-263 for -40°C to +85°C operation.

Features
  • 2.5A, 65V internal switch rating
  • 3V to 40V input voltage range
  • Current-mode operation, 2.5A peak
  • Internal cycle-by-cycle current limit
  • Thermal shutdown
  • Twice the frequency of the LM2577
  • Low external parts count
  • Operates in most switching topologies
  • 7mA quiescent current (operating)
  • Fits LT1171/LM2577 TO-220 and TO-263 sockets
Parameter
Parameter Name Value Value
Regulator Type Step Up (Boost) Step Up (Boost)
Input Voltage Range Min (V) 3 3
Input Voltage Range Max (V) 40 40
Output Voltage Range Min (V) 3.6 3.6
Output Voltage Range Max (V) 65 65
Quiescent Current (mA) typ 7 7
Switching Frequency (kHz) 100 100
Operating Temp Range -40 to 85 -40 to 85
Vfb (V) 1.24 1.24
Duty Cycle Max (%) 95 95
Switch current (A) typ 4 4
Alternative Topology SEPIC, Flyback SEPIC, Flyback
Documents
MIC2171 - 100kHz 2.5A Switching RegulatorData Sheets11/05/2015185KB
Ordering Information
Part NumberLeadsPackage TypeTemp RangePacking1+26+100+1000+5000+
MIC2171WT5TO-220-40C to +85CTUBE4.173.473.162.632.43
MIC2171WU5DDPAK-40C to +85CTUBE4.333.603.282.732.52
MIC2171WU-TR5DDPAK-40C to +85CT/R4.333.603.282.732.52
RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
MIC2171WT1.9839003.1200005TO-220-Matte Tine3
MIC2171WU1.4625002.5200005DDPAK-Matte Tine3
MIC2171WU-TR1.4625002.0533335DDPAK-Matte Tine3
MIC2171 - 100kHz 2.5A Switching Regulator MIC2171