MCP1661T-E/OT

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MCP1661T-E/OT application field and working principle
MCP1661T-E/OT is a versatile DC to DC switching regulator in an 8-pin, thermal enhanced, space saving, SOIC package. It is designed to provide a simple and compact circuit solution, designed to meet the requirements of cost sensitive applications. The MCP1661T-E/OT can provide up to 50 mA of output current to a wide range of load voltages. It can be used as a step-up or step-down regulator, with an input voltage of 1.8 to 5.5 V.

The device has a wide range of operating frequencies from 1.4 to 3.4 MHz. Its input and output ranges are adjustable via external resistor, avoiding the need for expensive potentiometers in applications. The MCP1661T-E/OT has an on/off feature for low power applications where programmed power down can reduce power consumption. In addition, the device has an active low shutdown input, disable control, and thermal protection control.

Working principle

The MCP1661T-E/OT operates with a constant current or constant voltage control scheme. In constant current mode, the output voltage is controlled by varying the current through the inductor. In constant voltage mode, the output is regulated by using pulse width modulation (PWM). The current through the inductor is regulated by adjusting the duty cycle of the PWM signal. For step-up regulation, the voltage across the inductor is always greater than the input voltage, and for step-down regulation, the voltage across the inductor is always lower than the input voltage.

The device utilizes a synchronous switching scheme, where the MCP1661T-E/OT synchronizes the switching frequency of the two switches with the clock signal which is generated internally. This allows the device to maintain a constant frequency and allows it to react quickly to load changes. The switching frequency can be adjusted using a resistor between the SYNC pin and the ground pin.

The MCP1661T-E/OT is capable of providing up to 50 mA of output current and is useful in applications where power efficiency is important. It can also be used in battery powered applications where the supply voltage varies with time, as the MCP1661T-E/OT can maintain a constant regulated output voltage under varying input voltage conditions.

Applications

The MCP1661T-E/OT is an ideal solution for a wide range of applications including battery charging, industrial control and instrumentation, automotive applications, telecom systems, PC peripherals and consumer electronics. The device is well suited for powering low power systems, as it operates with a low quiescent current and can maintain a regulated output voltage over a wide input voltage range. It is also ideal for applications that require a highly accurate regulated output, as the device can provide a precise output voltage over a wide temperature range.

The MCP1661T-E/OT is also a good choice for applications requiring high power density, as its small package size, low power consumption, and ability to provide up to 50 mA of output current make it an ideal choice for applications with size, power and performance constraints.

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