MCP1642BT-ADJI/MS

Voltage - Output (Min/Fixed):	1.8V
Base Part Number:	MCP1642
Supplier Device Package:	8-MSOP
Package / Case:	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	1MHz
Current - Output:	800mA
Voltage - Output (Max):	5.5V
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	0.65V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Boost
Output Configuration:	Positive
Function:	Step-Up
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The MCP1642BT-ADJI/MS application is a voltage regulator that performs a DC-to-DC conversion, commonly referred to as a switch mode power supply (SMPS). These are used to create DC voltage from an AC source, as well as to convert from one DC voltage level to another. The MCP1642BT-ADJI/MS is a highly efficient synchronous buck regulator with an adjustable output voltage and constant frequency current mode control.The application field of the MCP1642BT-ADJI/MS primarily focuses on low-power, high-efficiency systems such as those found in handheld devices, portable tools and consumer electronics. This type of voltage regulator is capable of maximum switching frequency of 1.5 MHz and up to 96% efficiency, making it ideal for energy efficient, space saving designs. As such, the MCP1642BT-ADJI/MS is perfect for applications in industrial, medical, point-of-load, and consumer electronics.The working principle of a DC-to-DC step-down regulator, such as the MCP1642BT-ADJI/MS, is to take in a voltage, e.g., from a battery or AC line, then reduce and regulate the output voltage to a level specified by the designer. This is achieved through a combination of a pulse-width modulator, high-performance MOSFETs, and linear regulators. The key components are the high-side and low-side MOSFETs and the linear regulator.In the MCP1642BT-ADJI/MS, the first component is the high-side MOSFET, which is the main switch of the voltage reduction process. It works in conjunction with the pulse-width modulator to accurately adjust the duty cycle of the MOSFET switch in order to vary the output voltage. When the high-side MOSFET is on, the voltage is allowed to pass through it and increase the drain of the low-side MOSFET. When the high-side MOSFET is off, the voltage is diverted to an output capacitor, which is then fed back into the control loop with a voltage feedback pin.The output of the MCP1642BT-ADJI/MS is regulated by a linear regulator, which takes the output of the switched output stage and regulates it to a smaller voltage. This is known as a Ripple Rejection Switching Regulator (RRSR). The linear regulator has two main components, an internal error amplifier as well as a stable output voltage regulator. The error amplifier monitors the output voltage, comparing it to the reference voltage, and controls the duty cycle of the high-side MOSFET in response.The MCP1642BT-ADJI/MS application also has a thermal protection feature that shuts down the IC if it detects excessive heat. This will ensure the device remains safe and operate within expected parameters.In conclusion, the MCP1642BT-ADJI/MS is a highly efficient synchronous buck regulator with an adjustable output voltage and constant frequency current mode control. It is best suited for applications in low-power, high-efficiency systems such as those found in handheld devices, portable tools and consumer electronics. With its high switching frequency, up to 96% efficiency, and thermal protection feature, the MCP1642BT-ADJI/MS is the perfect choice for your DC-to-DC voltage regulation needs.

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