MAX20003CATPD/V+ Application Field and Working Principle

The MAX20003CATPD/V+ is a DC-DC step-down converter, intended for an input voltage of 6V to 42V and a load current of up to 5A. It consists of an internal high-side switch, current sensing, and a synchronous buck regulator with a precise regulation of 1.8V to 5.5V and a programmable frequency of 700kHz to 2.1MHz. This makes the MAX20003CATPD/V+ suitable for a wide variety of applications needing an output voltage regulated with a wide input voltage range.

Overview

The MAX20003CATPD/V+ operates by pulling down on the output voltage in order to regulate it and maintain it at a precise output voltage. It operates by taking advantage of the dynamic switching of a power transistor in order to step down the input voltage and maintain the output voltage constant. It uses the synchronous buck topology which provides a regulated output voltage over a wide range of input voltage, current, and temperature. This regulator also provides a pulse-width modulated (PWM) output in order to enable quick changes in regulation.

Application Fields

The MAX20003CATPD/V+ can be used in a wide range of applications, from automotive, industrial, military and telecommunications. Automotive and industrial applications generally require a regulator with the ability to regulate a wide range of input voltages and maintain the output voltage constant. Examples of automotive applications include engine control modules, powertain control modules, electric power steering, and fuel injection systems. Examples of industrial applications include variable speed drives, motor drives, and brushless DC (BLDC) motor drives.

The MAX20003CATPD/V+ can also be used in military, telecommunications and space applications. Military and aerospace applications can use the MAX20003CATPD/V+ since it is capable of withstanding wide input voltage ranges and is immune to radiation. Examples of military applications include remote sensing devices, UAVs/drones, radios, and communication systems. Telecommunications applications can use this device due to its high-efficiency and small size. This regulator can be used for powering transceivers, base stations, and cellular infrastructure.

Features

The MAX20003CATPD/V+ provides a wide range of features, making it suitable for a wide range of applications. It has an ultra-low quiescent current of only 26µA. The current limiting is adjustable, as well as the overvoltage protection and undervoltage lockout. The regulator has an adjustable switching frequency range of 700kHz to 2.1MHz, allowing for design flexibility and customization of the power supply design. It also has an integrated foldback current limiter to provide protection against short-circuit and overload conditions. Finally, the device has a thermal shutdown circuit that will prevent the regulator from overheating.

Working Principle

The MAX20003CATPD/V+ operates by taking advantage of a synchronous buck regulator with a precise regulation of 1.8V to 5.5V and a programmable frequency of 700kHz to 2.1MHz. It works by taking the input voltage and reducing it with the help of a high-side switch and a synchronous buck regulator. The MAX20003CATPD/V+ regulates the output voltage by quickly turning on and off the high-side switch. The synchronous buck regulator ensures that the output voltage is maintained at a precise level by adjusting the amount of current allowed to go through the switch. The pulse-width modulated (PWM) output enables quick changes in regulation so that the output voltage is always maintained within the specified range.