Demoboard ADM00865

High-voltage 3.6 A Integrated Switch PFW/PWM Boost Regulator

Topologie: Boost
Eingangsspannung (min.): 3.60 V
Eingangsspannung (max.): 4.20 V
Schaltfrequenz (min.): 425.00 kHz
Schaltfrequenz (max.): 575.00 kHz
Ausgang 1: 12.00 V / 1.000 A

Erstveröffentlichung am 29.08.2019, Version 1 vom


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.


  • 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


  Artikel Nr. SPEC Produktserie L
RDC max.
RDC typ.
Material LR
Version Muster
7443340470 PDF WE-HCC SMT-Hochstrominduktivität 4.7 7.5 8 13.5 12.7 Ferrite 3.5 45
7447714047 PDF WE-PD SMT-Speicherdrossel 4.7 7 8 12.4 10.4 34 Performance
744778004 PDF WE-PD SMT-Speicherdrossel 4.7 2.32 4.2 60 42 45 Standard

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • MCP1665
    Topologie: Boost, Eingangsspannung (min.): 3.30 V, Eingangsspannung (max.): 4.20 V, Schaltfrequenz (min.): 425.00 kHz, Schaltfrequenz (max.): 575.00 kHz, Ausgang 1: 24.00 V / 0.350 A