TPS77815DR

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TPS77815DR is a step-down DC-DC converter driver with excellent features. It features a wide input voltage of 2.9V to 24V and a low-noise, low-ripple linear regulator with short-circuit protection that operates from a programmable switching frequency up to 1MHz. It also has a built-in overload and undervoltage lockout (UVLO) protection features making the TPS77815DR ideal for applications such as embedded systems, PCMCIA cards, I/O modules, automotive embedded control units and other sensitive power distribution systems.

This linear DC-DC converter is designed to provide high quality power to the system it powers. The output voltage can be adjusted using a voltage divider connected across the OUT and IN pins of the TPS77815DR chip. The output current can be limited by setting a voltage value across the CS and FB pins, allowing adjustments up to +5.5V.

The system is enabled by pulling the EN pin low. The output voltage is monitored through the FB pin of the TPS77815DR. There are also thermal shutdown, current limit and UVLO protections, which can be enabled through the OVLO pin. The device can be powered up from a sleep mode, by first pulling the EN pin high, then pulling the EN pin low.

One important application of the TPS77815DR is its ability to serve as a power supervisor and sequencer for multiple downstream ICs. When the EN pin is pulled low, the voltage regulator is enabled and the main power supply is activated, allowing these ICs to be powered up. The TPS77815DR also provides reverse current protection, meaning that when the output voltage of the VCORE drops below the UVLO voltage, the load will be disabled, protecting the downstream ICs from damage that could be caused by a possible short to ground.

Another key advantage of the TPS77815DR is the current limitation feature. This means that the output current can be limited to a desired value. This is achieved by setting a voltage across the CS and FB pins. This way, when the current reaches a certain limit, the voltage drop across the CS pin will cause the voltage at the FB pin to drop as well, limiting the current and preventing possible damage or overloading to the downstream ICs.

The TPS77815DR is also ideal for applications where noise and ripple are the key concerns. It has an integrated low-noise linear regulator, which reduces the output noise to less than 8mVrms, with an external resistor signal connected to the FB pin. This feature makes the TPS77815DR ideal for use in audio, medical and broadcasting systems.

These are just some of the advantages and applications of the TPS77815DR. It is a highly reliable and versatile device that can handle a wide voltage range, low-noise operation and reverse current protection. It is an ideal choice for applications that require precision, high-efficiency and noise reduction.

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