MCP1703AT-4002E/CB

Current - Output:	250mA
Base Part Number:	MCP1703A
Supplier Device Package:	SOT-23A-3
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	--
PSRR:	35dB (100Hz)
Current - Quiescent (Iq):	5µA
Series:	--
Voltage Dropout (Max):	0.725V @ 250mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	4V
Voltage - Input (Max):	16V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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IntroductionMCP1703AT-4002E/CB, manufactured by Microchip, is a high-performance linear voltage regulator IC, which is designed to provide an adjustable output voltage in the range of 1.20V to 5.50V at up to 500mA. The main feature of this IC is the ability to operate in the sub-milliamp current ranges, providing an ultra-low power solution and cost-effective alternative to large, expensive switching regulator implementations. The MCP1703AT-4002E/CB is a highly efficient, low power voltage regulator that is capable of operating in both linear and switching modes, providing current range of 0.5mA to 500mA. Additionally, the MCP1703AT-4002E/CB has a thermal shutdown protection, short-circuit current limiting, reverse saturation current limiting and over-voltage protection features. This IC is specifically designed for applications such as embedded systems, multi-processor and digital systems, personal computers, mobile computing and power management.Application FieldMCP1703AT-4002E/CB is an excellent choice for all types of applications requiring low power and minimum component count. The benefits of this IC include low quiescent current, fast transient response, low output noise, excellent line and load regulation, tight voltage regulation and low power dissipation. This IC is particularly useful for applications which require low quiescent current and very tight voltage regulation, such as electronic instrumentation, computer peripherals, telecommunications, automotive systems and other applications where space is at a premium, as well as portable electronic devices, rechargeable batteries and memory maintenance or power-saving circuitry.Working PrincipleThe MCP1703AT-4002E/CB employs a linear regulator topology and relies on the principle of power conversion, whereby electrical energy is converted from one form to another. The input voltage is supplied to the IC and it is then regulated by the regulator circuitry, which consists of a series of resistors, capacitors and transistors, all of which are connected in a specific order to create a voltage reference and to provide feedback control. The output voltage is adjusted using a potentiometer, which is adjusted to produce the desired output voltage. The voltage reference is then compared to the feedback voltage, and any difference between the two is used to control the operation of the regulator. This IC employs an internal sensing circuit which determines the output voltage and also provides over-voltage protection.ConclusionMCP1703AT-4002E/CB is a high-performance linear voltage regulator IC, which is designed to provide an adjustable output voltage in the range of 1.20V to 5.50V at up to 500mA. The IC is capable of operating in both linear and switching modes, and provides features such as thermal shutdown protection, short-circuit current limiting, reverse saturation current limiting and over-voltage protection. This IC is ideal for applications requiring low power and minimum component count, and is used in electronic instrumentation, computer peripherals, telecommunications, automotive systems and other applications where space is a limiting factor. The working principle of this IC is based on power conversion, whereby electrical energy is converted from one form to another, and output voltage is regulated using a series of components connected in a specific order.

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