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Conv DC-DC 0.5V to 5V Synchronous Step Up Single-Out 0.6V to 5V 0.55A Automotive 8-Pin DFN EP Tube

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MCP1643-I/MC General Description

MCP1643 is a compact, high-efficiency, fixed frequency, synchronous step-up LED driver with constant current, that operates from one and two-cell alkaline and NiMH/NiCd batteries. The device can also drive two red/green/yellow series connection LEDs.

Microchip Technology, Inc Inventory

Key Features

  • 1.6A Typical Peak Input Current Limit
  • Up to 550 mA LED Load Current
  • Low Start-up Voltage: 0.65V (typical, 25 mA LED Current)
  • Low Operating Input Voltage: down to 0.5V
  • Maximum Input Voltage < VLED<5.0V
  • Maximum Output Voltage: 5.0V
  • Overvoltage Protection
  • Low Reference Voltage: VFB= 120 mV
  • Pulse-Width Modulation Mode Operation (1 MHz)
  • Internal Synchronous Rectifier
  • Internal Compensation
  • Inrush Current Limiting
  • Internal Soft-Start (240 µs typical)
  • Shutdown (EN = GND): True Load Disconnect
  • Dimming Control by Variable Duty Cycle
  • Shutdown Current: 1.2 µA (typical)
  • Overtemperature protection
  • Packages:MSOP-8, 2x3 DFN-8
Microchip Technology, Inc Original Stock


Category Integrated Circuits (ICs)Power Management (PMIC)LED Drivers Mfr Microchip Technology
Series - Package Tube
Product Status Active Type DC DC Regulator
Topology Step-Up (Boost) Internal Switch(s) Yes
Number of Outputs 1 Voltage - Supply (Min) 0.5V
Voltage - Supply (Max) 5V Voltage - Output 5V
Current - Output / Channel 550mA Frequency 1MHz
Dimming PWM Applications Backlight
Operating Temperature -40°C ~ 85°C (TA) Mounting Type Surface Mount
Package / Case 8-VFDFN Exposed Pad Supplier Device Package 8-DFN (2x3)
Base Product Number MCP1643 Manufacturer Microchip
Product Category Switching Voltage Regulators RoHS Details
Output Voltage 5 V Output Current 1.6 A
Input Voltage, Max 5 V Mounting Style SMD/SMT
Switching Frequency 1 MHz Quiescent Current 1.2 uA
Minimum Operating Temperature - 40 C Maximum Operating Temperature + 85 C
Qualification AEC-Q100 Input Voltage, Min 500 mV
Brand Microchip Technology Product Switching Regulators
Product Type Switching Voltage Regulators Shutdown Shutdown
Factory Pack Quantity 150 Subcategory PMIC - Power Management ICs
Unit Weight 0.001319 oz


Shipping Method

Our products are mainly transported and delivered by DHL, FedEx, UPS and other logistics partners on site -- Available to 200+ countries.

Delivery Time

The delivery time is usually within 2-7 days, depending on the logistics provider and the area of delivery.

The following are the estimated delivery times of some logistics service providers.

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Checks and other instruments are not supported to pay for orders and customers are required to pay all possible fees, including sales tax,
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Our policies and procedures are designed to ensure compliance with various quality specifications and to quickly resolve quality-related issues.

We promise to provide 365 days quality assurance service for all our products.

If you have any dissatisfaction with the quality of the product you received, you can contact us for a refund or exchange, as long as the product is kept in its original condition.


AVAQ determines and packages all devices based on electrostatic discharge (ESD) and moisture sensitivity level (MSL) protection requirements.
  • ESD


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Buying Guide

  • What is the lifespan of MCP1643-I/MC?

    The lifespan of MCP1643-I/MC depends on various factors such as the quality of materials used, operating conditions, and the manufacturer's recommended usage time. The datasheet provided by the manufacturer specifies the expected lifespan of the product.

  • Where can I find the full specification of MCP1643-I/MC?

    You can find it with PDF Datasheet for MCP1643-I/MC on this page. If it is not available, you can contact Avaq at [email protected] to inquire about the Datasheet for this part.

  • How to check the quality of MCP1643-I/MC?

    Avaq has separate quality services with common quality inspection equipment for testing items, you can also fill out a sample form, our team will get in touch with you within 24 HOURS.

  • Can I purchase samples for testing?

    Avaq offers free samples for customers to test. This can often help you determine whether the chip or component meets your needs.

  • Where can I check the delivery after the order is completed?

    Once the order is completed, you will receive an order confirmation email containing a tracking number from AVAQ, then you can track the delivery by yourself.

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