Microchip

MCP1642B
Demoboard ADM00460

MCP1642B/D High-Current Synchronous Boost Converter Evalution Board User's Guide

Topologie: Boost
Eingangsspannung (min.): 0.65 V
Eingangsspannung (max.): 5.50 V
Ausgang 1: 5.50 V / 0.350 A

Erstveröffentlichung am 29.08.2019, Version A vom

Beschreibung

The MCP1642B/D is a compact, High-efficiency, fixed frequency, synchronous step-up DC-DC converter. These products provides an easy-to-use power supply solution for applications powered by either one-cell, two-cell, or three-cell alkaline, NiCd, NiMH, one-cell Li-Ion or Li-Polymer batteries. The MCp1642B/D is capable of regulating the output voltage over a wide 1.8V to 5.5V range and typically can deliver over 400mA of load current at 3.3V output when supplied from a single 1.5V cell. The regulated output voltage , VOUT, should be greater than the input voltage, VIN.The devices are available in MSOP-8 and 2x3mm DFN-8 lead packages.MCP1642B/D High-Current Synchronous Boost Converter Evaluation Board offers both package types in two boost-converter applications for 3.3V and 5.0V output voltage.

Merkmale

  • Start-up voltage: 0.65V at VOUT=3.3V and IOUT=1mA, resistive load
  • Input voltage range after start-up, VIN:0.35V up to VOUT-200-300 mV recommended headroom
  • Adjustable output voltage range: 1.8V to 5.5V, set by a resistor divider on board (bottom application using MCP1642-ADJ)
  • Fixed 3.3V output voltage (using the fixed output voltage MCP1642D-33)
  • Output current: typical 200mA @ 3.3V Output, 1.2V Input or 800mA @ 5.0V Output, 3V Input
  • Output Disconnect(MCP1642B)
  • Input-output Bypass(MCP1642D)
  • PWM Operation
  • PWM Switching Frequency=1 MHz
  • Enable state, Power Good, Switch test points on board
  • Peak Input Current limit of 1.8A
  • Over-temperature protection (if the die temperature exceeds +150 C, +35 C hysteresis)

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
744052005 PDF WE-TPC SMT-Speicherdrossel 5 1.65 1.8 50 60 55
744042004 PDF WE-TPC SMT-Speicherdrossel 4.7 1.72 1.65 70 82 70