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MCP1640 Boost Regulator


Microchip's MCP1640/B/C/D low-voltage technology allows regulators to start up without high inrush current


Microchip's MCP1640/B/C/D is a compact, high-efficiency, fixed frequency, synchronous step-up DC-DC converter. It provides an easy-to-use power supply solution for applications powered by one-cell, two-cell, or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries. Low-voltage technology allows the regulator to start up without high inrush current or output voltage overshoot from a low 0.65 V input. High efficiency is accomplished by integrating the low- resistance N-channel boost switch and synchronous P-channel switch. All compensation and protection circuitry are integrated to minimize external components. For standby applications, the MCP1640 operates and consumes only 19 μA while operating at no load and provides a true disconnect from input to output at shut down (EN = GND). Additional device options are available that operate in PWM only mode and connect input to output bypass while shut down.

A "true" load disconnect mode provides input to output isolation while disabled by removing the normal boost regulator diode path from input to output. A bypass mode option connects the input to the output using the integrated low resistance P-Channel MOSFET, which provides a low bias keep alive voltage for circuits operating in Deep Sleep mode. Both options consume less than 1 μA of input current. Datasheet
MCP1640 Boost Regulator

Applications
  • One, two, and three cell alkaline and NiMH/NiCd portable products
  • Single cell Li-ion to 5 V converters
  • Li coin cell powered devices
  • Personal medical products
  • Wireless sensors
  • Handheld instruments
  • GPS receivers
  • Bluetooth headsets
  • +3.3 V to +5.0 V distributed power supply

Digi-Key P/N Manufacturer P/N Description
MCP1640T-I/CHYCT-ND MCP1640T-I/CHY IC CONV DCDC STEPUP SYNC SOT23-6
MCP1640DT-I/CHYCT-ND MCP1640DT-I/CHY IC CONV DCDC STEPUP SYNC SOT23-6
MCP1640CT-I/CHYCT-ND MCP1640CT-I/CHY IC CONV DCDC STEPUP SYNC SOT23-6
MCP1640BT-I/CHYCT-ND MCP1640BT-I/CHY IC CONV DCDC STEPUP SYNC SOT23-6
MCP1640-I/MC-ND MCP1640-I/MC IC CONV DC-DC STEPUP SYNC 8DFN
MCP1640D-I/MC-ND MCP1640D-I/MC IC CONV DC-DC STEPUP SYNC 8DFN
MCP1640C-I/MC-ND MCP1640C-I/MC IC CONV DC-DC STEPUP SYNC 8DFN
MCP1640B-I/MC-ND MCP1640B-I/MC IC CONV DC-DC STEPUP SYNC 8DFN
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