TPS51621RHAT

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The TPS51621RHAT is a dual integrated synchronous buck converter with an all-digital core. It supports a wide range of application fields and operating principles, providing excellent load and line regulation for a variety of critical applications such as medical, industrial and automotive. It also includes various protections, such as thermal shutdown, maximum current limit (overcurrent), and overvoltage protection, making it suitable for safety-critical applications.

The TPS51621RHAT product is designed to provide highly configurable and robust DC-DC output regulation at the lowest possible power loss and cost with the fewest external components. It can automatically self-adjust to provide different output voltages and can switch between voltage levels with a very fast transient response. This allows for high load current steps and load transients without requiring manual adjustment.

The TPS51621RHAT integrates two synchronous-buck regulators and a power supply sequencer in a two-output package. The two integrated regulators can operate independently or synchronously depending on the application requirements. The two outputs are controlled separately and have independent voltage and current limits. The sequencing of the power supply is configurable based on the voltage setting. In addition, the TPS51621RHAT has dynamic adaptive dead-time control, allowing for optimal efficiency under a broad range of operating frequencies.

The TPS51621RHAT can be used in a wide range of applications at different power levels, including point of load (PoL) and intermediate bus converters, high-bandwidth low EMI high-current regulation, VRD10.X-compliant graphic cards, server CPUs, and more. It is especially well-suited for applications requiring high efficiency over a wide operating range, such as data centers, battery-powered systems, automotive, and test systems.

In terms of its application fields, the TPS51621RHAT can be used for a variety of power levels, from 0.6V to 5.75V and from 1.3A to 40A per output. It has a wide operating voltage of 5.5V to 25V and can support output voltages as low as 0.6V. The device also has an adjustable switching frequency of 200 kHz to 2.2 MHz with a 1.25% accuracy. Furthermore, the TPS51621RHAT also allows for flexible configuration of its features, such as the output power sequencing, programmable soft start, undervoltage lockout, and its dynamic adaptive dead time control.

In terms of its working principle, the TPS51621RHAT utilizes synchronous rectification to reduce the output voltage ripple, resulting in better output current control. The device also integrates an adaptive dead-time control circuit, which adheres to the phase relationship between the high and low side gate signals, ensuring peak efficiency across a broad range of load current and frequency. Additionally, the adjustable peak current limit allows for better current sensing as well as improved transient response.

Overall, the TPS51621RHAT is a specialized digital switching regulator solution that provides excellent load and line regulation, high power efficiency over a wide operating range, and flexible configuration in the most compact form factor. Its integrated voltage and current limit protection and programmable soft start protect against overcurrent and overvoltage conditions, making it suitable for a wide range of industrial and automotive applications.

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