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Microchip MCP1642B | Demoboard ADM00460

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

Overview

TopologyBoost Converter
Input voltage0.65-5.5 V
Output 15.5 V / 0.35 A
IC revisionA

Description

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.

Features

  • 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)

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
fres
(MHz)
MountRDC max.
(mΩ)
SizeVersion Samples
744025004
STE ALT EAG CAD LTS PSP SPE IGS CADWE-TPC SMT Tiny Power Inductor 4.7 1.35 1.7 100 84 SMT 120 2828 SMT
744042004
STE ALT EAG CAD LTS PSP SPE IGS CADWE-TPC SMT Tiny Power Inductor 4.7 1.72 1.65 70 70 SMT 82 4818 SMT
7447785004
IGS STP ALT EAG CAD LTS PSP SPE CADWE-PD SMT Power Inductor 4.7 2.2 2.5 60 53 SMT 78 6033 Robust
744052005
STE ALT EAG CAD LTS PSP SPE IGS CADWE-TPC SMT Tiny Power Inductor 5 1.65 1.8 50 55 SMT 60 5818 SMT
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
ISAT
(A)
RDC typ.
(mΩ)
fres
(MHz)
MountRDC max.
(mΩ)
SizeVersion Samples