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All Products > Semiconductors > Power Management ICs > Voltage Regulators - Switching Regulators

Microchip MCP1643 1MHz Synchronous Boost LED Constant Current Regulator

Microchip MCP1643 1MHz Synchronous Boost LED Constant Current Regulator is optimized to drive one LED with constant current that operates from one and two-cell alkaline and NiMH/NiCd batteries. This Microchip device can also drive two red/green/yellow series connection LEDs. Low-voltage technology allows the regulator to start up without high-output voltage and load-current overshoot from a low 0.65V input. The device features a typical peak input current limit of 1.5A. 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 external components. MCP1643 features an output overvoltage protection that limits the output voltage to 5.0V typical, in case the LED fails or output load is disconnected. MCP1643 is ideal for use in a variety of applications, including one- and two-cell Alkaline and NiMH/NiCd portable LED lighting products, LED flashlight and head lamps, rechargeable flashlights, wall LED lamps with motion detectors, and more.
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Category   Semiconductors >  Power Management ICs >  Voltage Regulators - Switching Regulators

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Microchip Technology MCP1643-I/MS
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MCP1643-I/MS

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Microchip Technology Voltage Regulators - Switching Regulators
Data Sheet 1,351
In Stock
Alternative Packaging
1: $1.06
10: $0.98
25: $0.82
100: $0.74



Min.: 1
Mult.: 1
5 V 1 MHz 5 V 1.6 A 1 Output + 85 C SMD/SMT MSOP-8
Microchip Technology MCP1643-I/MC
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MCP1643-I/MC

New Product
New Product


Microchip Technology Voltage Regulators - Switching Regulators
Data Sheet 1,331
In Stock
Alternative Packaging
1: $1.06
10: $0.98
25: $0.82
100: $0.74



Min.: 1
Mult.: 1
5 V 1 MHz 5 V 1.6 A 1 Output + 85 C SMD/SMT DFN-8
579-MCP1643T-I/MS


To purchase full reel, order in multiples of 2500:
MCP1643T-I/MS

New Product
New Product


Microchip Technology Voltage Regulators - Switching Regulators
Data Sheet Non-Stocked
Alternative Packaging
Cut Tape
1,800: $0.74
Reel
2,500: $0.74



Min.: 1,800
Mult.: 1
Reel: 2,500
579-MCP1643T-I/MC


To purchase full reel, order in multiples of 3300:
MCP1643T-I/MC

New Product
New Product


Microchip Technology Voltage Regulators - Switching Regulators
Data Sheet Non-Stocked
Alternative Packaging
Cut Tape
2,370: $0.74
Reel
3,300: $0.74



Min.: 2,370
Mult.: 1
Reel: 3,300
Compare up to 20 parts.
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