Microchip

MCP1642B

1.8A Input Current Switch, 1 MHz Low-Voltage Start-Up Synchronous Boost Regulator

Topologie: Boost
Eingangsspannung (min.): 0.90 V
Eingangsspannung (max.): 1.60 V
Schaltfrequenz (min.): 850.00 kHz
Schaltfrequenz (max.): 1150.00 kHz
Ausgang 1: 3.30 V / 1.800 A

Erstveröffentlichung am 18.12.2014, Version A vom

Beschreibung

The MCP1642B/D devices are compact, high-efficiency, fixed-frequency, synchronous step-up DC-DC converters. This family of devices provides aneasy-to-use power supply solution for applications powered by either one-cell, two-cell, or three-cell alkaline, Ultimate Lithium, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries.Low-voltage technology allows the regulator to start-up without high inrush current or output voltage overshoot from a low voltage input. High efficiency is accomplished by integrating the low-resistance N-Channel Boost switch and synchronous P-Channel switch. All compensation and protection circuitry are integrated to minimize the number of externalcomponents. An open-drain Power Good output is provided to indicate when the output voltage is within 10% of regulation and facilitates the interface with an MCU. For standby applications, MCP1642B provides a “true output disconnect” from input to output while in shutdown (EN = GND). An additional device option (MCP1642D) is available and connects “input to output bypass” while in shutdown. Both options consume lessthan 1 μA of input current.For the adjustable (ADJ) device options, the output voltage is set by a small external resistor divider. Fixed VOUT device options do not require external divider resistors. Two package options, 8-lead MSOP and 8- lead 2x3 DFN, are available.

Merkmale

  • Up to 96% Typical Efficiency
  • 1.8A Typical Peak Input Current Limit:
  • IOUT > 175 mA @ 1.2V VIN, 3.3V VOUT
  • IOUT > 600 mA @ 2.4V VIN, 3.3V VOUT
  • IOUT > 800 mA @ 3.3V VIN, 5.0V VOUT
  • IOUT > 1A @ VIN > 3.6V, 5.0V VOUT
  • Low Start-Up Voltage: 0.65V, typical 3.3V VOUT @ 1 mA
  • Low Operating Input Voltage: 0.35V, typical 3.3V VOUT @ 1 mA
  • Output Voltage Range:
  • Reference Voltage, VFB = 1.21V
  • 1.8V to 5.5V for the adjustable device option
  • 1.8V, 3.0V, 3.3V and 5.0V for fixed VOUT options
  • Maximum Input Voltage  VOUT < 5.5V
  • PWM Operation: 1 MHz Low Noise, Anti-Ringing Control
  • Power Good Open-Drain Output
  • Internal Synchronous Rectifier
  • Internal Compensation
  • Inrush Current Limiting and Internal Soft-Start
  • Selectable, Logic-Controlled Shutdown States:
  • True Load Disconnect Option (MCP1642B)
  • Input-to-Output Bypass Option (MCP1642D)
  • Shutdown Current (All States): 1 μA
  • Overtemperature Protection
  • Available Packages:
  • 8-Lead MSOP
  • 8-Lead 2x3 DFNRemarks:
  • 5V output voltage with 700mA current is added from MCP1642B/DTwo-Cell to USB Power Evaluation Board User’s Guide

Artikel

  Artikel Nr. SPEC Produktserie L
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
RDC max.
(mΩ)
fres
(MHz)
Version L1
(µH)
IR 1
(A)
ISAT 1
(A)
RDC1 typ
(mΩ)
RDC1 max.
(mΩ)
fres 1
(MHz)
Muster
7447785004 PDF WE-PD SMT-Speicherdrossel 4.7 2.2 2.5 60 78 53 Robust
744025004 PDF WE-TPC SMT-Speicherdrossel 4.7 1.35 1.7 100 120 84 4.7 1.35 1.7 100 120 84
744052005 PDF WE-TPC SMT-Speicherdrossel 5 1.65 1.8 50 60 55 5 1.65 1.8 50 60 55
744042004 PDF WE-TPC SMT-Speicherdrossel 4.7 1.72 1.65 70 82 70 4.7 1.72 1.65 70 82 70

Weitere Anwendungen und Artikel von Würth Elektronik zu diesem IC

  • MCP1642B
    Topologie: Boost, Eingangsspannung (min.): 33.00 V, Eingangsspannung (max.): 4.20 V, Schaltfrequenz (min.): 850.00 kHz, Schaltfrequenz (max.): 1150.00 kHz, Ausgang 1: 5.00 V / 0.500 A
  • MCP1642B
    Topologie: Boost, Eingangsspannung (min.): 1.80 V, Eingangsspannung (max.): 3.60 V, Schaltfrequenz (min.): 850.00 kHz, Schaltfrequenz (max.): 1150.00 kHz, Ausgang 1: 5.00 V / 0.500 A