Microchip | MIC2172YM-TR

The MIC2172YM TR are complete 100 kHz SMPS current-mode controllers with internal 65 V 1.25 A power switches. The MIC2172 features external frequency synchronization or frequency adjustment.

Although primarily intended for voltage step-up applications, the floating switch architecture of the
MIC2172 makes it practical for step-down, inverting, and Cuk configurations as well as isolated topologies.

Feature:

• 1.25 A, 65 V internal switch rating
• 3 V to 40 V input voltage range
• Current-mode operation
• Internal cycle-by-cycle current limit
• Thermal shutdown
• Low external parts count
• Operates in most switching topologies
• 7 mA quiescent current (operating)
• External frequency synchronization (MIC2172)
• External frequency trim (MIC2172)
• Fits most LT1172 sockets (see applications info)

Applications:

• Laptop/palmtop computers
• ToysHand-held instrumentsOff-line converter up to 50W (requires external power switch)
• Predriver for higher power capability
• Master/slave configurations (MIC2172)