The MCP1665T-E/MRA device is a compact, high-efficiency, fixed-frequency, non-synchronous step-up DC-DC converter that integrates a 36V, 100 mΩ NMOS switch. It provides a space-efficient high-voltage step-up power supply solution for applications powered by either three-cell alkaline, Ultimate Lithium, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries. The integrated switch is protected by the typical 3.6A cycle-by-cycle inductor peak current limit operation. There is an output overvoltage protection and an open-load protection that turn off switching if the feedback resistors are accidentally disconnected, the feedback pin is short-circuited to GND or the output is exposed to excessive voltage. Pulse-Frequency Modulation (PFM) switching mode used for power saving is implemented, and it is selectable by the dedicated MODE pin.
MCP1665T-E/MRA is easy to use and allows creating classic boost, SEPIC or flyback DC-DC converters within a small Printed Circuit Board (PCB) area. All compensation and protection circuitry are integrated to minimize the number of external components.
Feature
- 36V, 100 mΩ Integrated Switch
- Up to 92% Efficiency
- Higher Current Compared to the Previous MCP166x Switchers Family
- Output Voltage Range: Up to 32V
- 3.6A Typical Peak Input Current Limit:
- IOUT > 1 A at 5.0V VIN, 12V VOUT
- IOUT > 700 mA at 3.3V VIN, 12V VOUT
- IOUT > 400 mA at 4.2V VIN, 24V VOUT
- Input Voltage Range: 2.9V to 5V
- Input Undervoltage Lockout (UVLO):
- UVLO at VIN Rising: 2.9V, typical
- UVLO at VIN Falling: 2.7V, typical
- No Load Input Current: 250 μA Typically for PFM, 500 μA Typically for PWM
- Shutdown Mode with 0.4 μA Typical Quiescent Current
- Automatically PFM/PWM or Selected by the MODE Pin, for High Efficiency
- 500 kHz PWM Operation with Skipping Mode Operation Selectable by Dedicated MODE Pin
- Feedback Voltage Reference: VFB = 1.2V
- Cycle-by-Cycle Current Limiting
- Internal Compensation
- Inrush Current Limiting and Internal Soft Start
- Output Overvoltage Protection (OVP) and Open-Load Protection (OLP) for Constant Current Configuration
- Thermal Shutdown
- Easily Configurable for SEPIC, Cuk or Flyback Topologies
- Available Package: 10-Lead 2x2 mm VQFN
