NCP300LSN20T3G

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NCP300LSN20T3G is a current-mode PWM synchronous buck regulator in the Microchip Supervisors family. This device provides a reliable and efficient power source for FPGAs, DSPs, microcontrollers, and other circuits. The device is available in a 1.95V to 5.5V input voltage range, adjustable output voltage from 0.6V to 5.2V, and an adjustable switching frequency from 500kHz to 2.3MHz.

The main purpose of a Supervisor is to protect a system against power supply related issues. It provides a means of booting up a system, and also provides a means of resetting the system when a fault occurs. This device has other features such as over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP) which all contribute to the reliability of the system.

NCP300LSN20T3G’s application field includes notebook, desktop and server power supplies, game consoles and AXIOM transceivers. This device also can be used in sensor-on-a-chip (SOC) and audio-on-a-chip (AOC) applications. The NCP300LSN20T3G operates in either current-mode or pulse-width modulation (PWM) modes with a regulated maximum duty cycle of 85%. It offers high-side ideal diode emulation for low external component count.

The working principle of NCP300LSN20T3G is cycle-by-cycle current limit. In this mode, the on-time is monitored and controlled by a comparator. If the maximum current limit is exceeded, the comparator trips and the device goes into a low-current limit state. This low-current limit prevents the device from overloading the system and potentially causing damage. This device also utilizes thermal shutdown that enables it to enter a limiting state when its maximum temperature has been reached.

In the NCP300LSN20T3G, a 2-bit digital logic pin selects the output voltage. The voltage scales linearly with the digital code written to the logic pin. The device also incorporates an asynchronous reset and power-on reset circuit that includes a level-sensitive reset output (RESET), supervised by an analog comparison circuit.

The NCP300LSN20T3G is a versatile and reliable device for protecting and powering FPGAs, DSPs, microcontrollers, and other system components. Its over-voltage protection (OVP), under-voltage protection (UVP), and over-temperature protection (OTP) features provide high reliability and performance in a wide range of applications. The device also provides low-cost, high-efficiency operation for a wide range of power applications.

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