Microchip MCP1663

Description

The MCP1663 device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DC converter which integrates a 36V, 400 mΩ 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-Polymerbatteries.

The integrated switch is protected by the 1.8A 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.

Low-voltage technology allows the regulator to start-up without high inrush current or output voltage overshoot from a low-voltage input. The device features a UVLO which avoids start-up and operation with low inputs or discharged batteries for two cell-powered applications.

For standby applications (EN = GND), the device stops switching, enters sleep mode and consumes 0.3 μA (typical) of input current.

MCP1663 is easy to use and allows creating classic boost, SEPIC or flyback DC-DC converters within a small Printed Circuit Board (PCB) area. Allcompensation and protection circuitry is integrated to minimize the number of external components. Ceramic input and output capacitors are used.

Features

• Up to 92% Efficiency
• High Output Voltage Range: up to 32V
• 1.8A Peak Input Current Limit: IOUT> 375 mA @ 5.0V VIN, 12V VOUT
• IOUT> 200 mA @ 3.3V VIN, 12V VOUT
• IOUT> 150 mA @ 4.2V VIN, 24V VOUT
• Input Voltage Range: 2.4V to 5.5V
• Undervoltage Lockout (UVLO): UVLO@VIN Rising: 2.3V, typical
• UVLO@VIN Falling: 1.85, typical
• No Load Input Current: 250 µA, typical
• Sleep mode with 200 nA Typical Quiescent Current
• PWM Operation with Skip mode: 500 kHz
• Feedback Voltage Reference: VFB= 1.227V
• Cycle-by-Cycle Current Limiting
• Internal Compensation
• Inrush Current Limiting and Internal Soft-Start
• Output Overvoltage Protection (OVP) in the event of:
• Feedback pin shorted to GND Disconnected feedback divider
• Overtemperature Protection
• Easily Configurable for SEPIC or Flyback Topologies
• Available Packages:
• 5-Lead SOT-23
• 2x3 8-Lead TDFN

Remarks:RECOMMENDEDINDUCTORSRefer page no.17

Typical applications

• Single-Cell Li-Ion to 5V, 12V or 24V Converters
• Camera Phone Flash
• LCD Bias Supply for Portable Applications
• Two and Three-Cell Alkaline, Lithium Ultimate and NiMH/NiCd Portable Products
• Portable Medical EquipmentH
• Hand-Held Instruments

More information

• Datasheet
• IC product information