AN80T53

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The AN80T53 is a 3-channel power management unit from ROHM Semiconductor and is categorised as a PMIC – Voltage Regulators – DC DC Switching Regulators. It is designed to provide high-precision control for a range of industrial, automotive, and consumer applications, as well as providing a versatile power solution for applications that require more than one voltage rail, such as microcontrollers, LED backlighting, and other components.

The AN80T53 features an integrated negative battery monitor, allowing it to detect when the supply voltage is lower than a voltage threshold and then regulate the output voltage accordingly to maintain operation. It also includes a GPIO (General Purpose Input/Output) pin that can be used to detect when the input voltage is below the minimum operating voltage, prompting the device to switch off the power and stop operation.

The AN80T53 is a synchronous-buck switching regulator capable of delivering up to 5 A of continuous current for each of its three channels, with a total of four selectable output voltages. It supports input voltage ranges from 5.5 V up to 20 V, making it applicable for a variety of applications such as automotive, industrial, and consumer electronics. The device also features adjustable dead-time control (DTC) and hysteresis voltage to reduce EMI generated by the switching regulator, providing a more reliable and robust solution.

The AN80T53 is capable of delivering high efficiency up to 92% without the need of external components due to the integrated Schottky diode. The device operates at a frequency of up to 1 MHz, allowing it to provide high accuracy and low noise performance. The built-in under-voltage protection (UVP) circuit prevents damage to the components in the system as well as providing thermal protection.

To protect the device from reverse-current and short circuit, the AN80T53 features a low RDS(ON) integrated internal switch and two-stage soft-start, which minimises the inrush current. The built-in peak current limit and adjustable over-current protection (OCP) also contribute towards a more robust and reliable system.

The AN80T53 enables users to save space and reduce cabling complexity by providing two integrated gate driver ICs for driving high-side and low-side MOSFETs. The integrated output voltage tracking feature also provides the flexibility to specify a desired output voltage range without having to use external components. The package of the device is in a 40-pin MLP (Mold-Lead-Frame Package) with an includes enabling the device to be used in various applications while maintaining a small footprint.

In summary, the AN80T53 is an ideal solution for a range of industrial, automotive, and consumer applications that require its multi-channel, high efficiency, and multi-rail switching regulator capabilities. Its low voltage input range, adjustable peak current limit, and integrated Schottky diode enable it to deliver high accuracy and reliability for a variety of applications.

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