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IC-Hersteller Microchip

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Microchip MCP1663

High-Voltage Integrated Switch PWM Boost Regulator with UVLO

Details

Topologie Aufwärtswandler
Eingangsspannung 2.4-5.5 V
Schaltfrequenz 425-575 kHz
Ausgang 1 32 V / 1.8 A
IC-Revision A

Beschreibung

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.

Eigenschaften

  • 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

Typische Anwendungen

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

Weiterführende Informationen

Artikeldaten

Artikel Nr. Daten­blatt Downloads Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(Ω)
RDC max.
(Ω)
fres
(MHz)
Version Bauform Muster
74408943100
STE ALT EAG CAD LTS PSP SPE IGS CAD WE-SPC SMT-Speicherdrossel 10 1.65 2.1 0.082 0.094 28 SMT 4838
744778610
IGS STP ALT EAG CAD LTS PSP SPE CAD WE-PD SMT-Speicherdrossel 10 2.1 1.8 0.074 0.088 35 Robust 6050
Artikel Nr. Daten­blatt
74408943100
744778610
Muster
Artikel Nr. Daten­blatt Downloads Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(Ω)
RDC max.
(Ω)
fres
(MHz)
Version Bauform Muster