MCP1661T-E/OT Description

The MCP1661T-E/OT is a high-voltage integrated switch PWM Boost Regulator with UVLO. The MCP1661 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DC converter which integrates a 36V, 800mR NMOS switch. It provides a space-efficient high-voltage step-up power supply solution for applications powered by either two-cell or three-cell alkaline, ultimate lithium, NiCd, NiMH, one-cell Li-ion or Li-polymer batteries. The integrated switch is protected by the 1.3A cycle-by-cycle inductor peak current limit operation. There is an output overvoltage protection which turns off switching in case the feedback resistors are accidentally disconnected or the feedback pin is short-circuited to GND.

MCP1661T-E/OT Features

• Up to 92% efficiency

• Internal compensation

• 1.3A Peak input current limit

• 36V, 800mR Integrated switch

• Under-voltage lockout (UVLO)

• Cycle-by-cycle current limiting

• 250µA Typical no load input current

• VFB = 1.227V Feedback voltage reference

• Inrush current limiting and internal soft start

• Sleep mode with 200nA typical quiescent current

• Easily configurable for SEPIC or Flyback topologies

• Output overvoltage protection (OVP) in the event of feedback pin shorted to GND

MCP1661T-E/OT Applications

• Medical

• Portable Devices

• Power Management