General Description
●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
●Applications
●• Laptop/palmtop computers
●• Battery operated equipment
●• Hand-held instruments
●• Off-line converter up to 50W(requires external power switch)
●• Pre-driver for higher power capability
