The MCP1665 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.
MCP1665 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.
Additional Features
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
The MCP1665 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.
MCP1665 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.
Additional Features
- 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
