TPS59640RSLT

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The TPS59640RSLT is a special purpose voltage regulator, with a wide variety of applications, especially as a ‘one-stop replacement’ for existing linear regulators. It is a fully integrated and versatile device, presenting various operating modes and features that could be used in numerous systems.

The TPS59640RSLT is a Pulse Width Modulation (PWM) mode step-down regulator with integrated low RDSON Power MOSFETs. This regulator is intended to be able to reduce a voltage ranging from 12V to 28V and 5V output voltages. Its application fields includes automotive, industrial, and telecommunications, among other systems architectures.

The system comes with a programmable frequency, interval and soft-start. The TPS59640RSLT is a very small package, with a total size of 4mm x 6mm. It is designed to work with voltages up to 28V and with resistive loads up to 3A.

The working principle of the TPS59640RSLT is based on PWM-mode step-down operation. In this operation, the power MOSFET turns on and off periodically, in a fractional duty cycle, according to the output voltage required. When the MOSFET is turned on, the input voltage is connected to the output voltage, allowing current flow, and when it is off, the output is clamped to the Vcc voltage. In this way, the output voltage is adjusted according to the duty cycle.

The device also implements overexcitation protection, which prevents the duty cycle from exceeding a safe operating value. Additionally, it also includes a brown-out detection and shut-down, for situations in which the changes in output voltage would be too steep or too fast. This helps to prevent problems from occurring in the output.

In summary, the TPS59640RSLT is a special purpose voltage regulator with a wide range of application fields, including automotive, industrial and telecommunications. It is capable of stepping down a voltage between 12V and 28V and has a PWM-mode step-down working principle. It comes with several features, such as programmable frequency, interval, soft-start and brown-out detection, making it particularly suitable for applications requiring very accurate and reliable voltage regulation.

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