TPS61081DRCR

TPS61081DRCR Application Field and Working Principle

The TPS61081DRCR is a recommended power solution designed exclusively for single-cell Li-ion battery-powered applications that require an extremely high efficiency boost converter device. It is a high frequency synchronous DC-DC boost converter, capable of delivering up to 240mA with an input voltage range of 2.5V to 4.5V and an output voltage range of 2.3V to 5.3V. Additionally, the TPS61081DRCR delivers up to 450mAh of current at its maximum efficiency, making it an ideal solution for mobile and embedded applications.

Applications of TPS61081DRCR

The TPS61081DRCR is an ideal device for applications where ultra-low power and high efficiency are needed, such as cordless phones, organizers, medical applications, digital cameras, Bluetooth devices, portable electronics, digital displays, audio devices, laptop computers, consumer electronics, and more.

It is also well suited for automotive applications because it can withstand an operating temperature range from -40°C to +125°C. Furthermore, it includes a low-noise LDO for noise-sensitive applications such as digital voice recording.

Features of TPS61081DRCR

The TPS61081DRCR features a built-in synchronous rectifier, which increases efficiency and reduces power losses. It has integrated EMI noise filters to reduce output voltage ripple, and is designed to operate to a wide input voltage range of 2.5V-4.5V. It also features a variable frequency control loop with a 1.5 MHz switching frequency.

The device is designed to operate over a power range of 2.5mW to 21mW, and provides a typical standby current of 1uA. It also includes short-circuit protection, open-circuit protection, overcurrent protection and thermal protection.

Working Principle of TPS61081DRCR

The working principle of the TPS61081DRCR is based on a boost topology, which is a power-conversion technique used to increase the output voltage. The input voltage is stepped up, utilizing the transfer of energy from an inductor to the output, via a synchronous rectifier.

The conversion process begins when the internal MOSFET is switched on, the inductor stores the energy required by the circuit and the output voltage is stepped-up. When the internal MOSFET is turned off, the energy stored in the inductor is transferred to the output and the output voltage is maintained.

The device is regulated by a high-frequency current-mode control with a fixed switching frequency and a programmable soft-start, which minimizes in-rush current during start-up and reduces output voltage ringing. The TPS61081DRCR also includes a PFM mode, which is used to reduce output voltage ripple and increase efficiency when the input voltage is high.

Conclusion

The TPS61081DRCR is a high efficiency, ultra low power synchronous DC-DC boost converter designed for single-cell Li-ion applications. It features a built-in synchronous rectifier, a variable frequency control loop, EMI noise filters, and integrated protection features. It is an ideal device for applications requiring high efficiency, such as cordless phones, organizers, and medical applications.