TPS61097-33DBVR Integrated Circuits (ICs)

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TPS61097-33DBVR is a synchronous step-down DC/DC converter from Texas Instruments, specifically designed for providing a low-noise power solution for portable applications. It features a very low power consumption, fast transient response and excellent line and load regulation. As the input voltage ranges from 2.5V to 5.5V and can be operated at up to 3MHz switching frequency, this device is suitable for a wide range of mobile applications, including smart phones, tablet PCs, GPS, wearable devices and so on. The TPS61097 also provides built-in protection circuits, so it can be used safely in a variety of applications.

The main application field of TPS61097-33DBVR is to convert the high-voltage to the required low-voltage power supply with a high-efficiency rate. It consists of a current-mode, single-switch, synchronous step-down DC/DC converter, which means that it is able to deliver an output current from 0A to 0.85A. It has a wide input voltage range of 2.5V–5.5V and its output voltage could be adjustable from 0.6V to the input voltage. With its maximum output current being 0.85A, it makes the TPS61097-33DBVR suitable for powering up any low power system, such as DSP or microcontroller-based designs. This power IC also features programmable constant frequency of 2MHz to 3MHz, which is a key feature for achieving high efficiency and reducing the size of the external components. It also has built-in protection circuits, such as adjustable foldback current-limit protection and thermal shutdown.

The working principle of TPS61097-33DBVR is relatively simple. It uses a low-side SenseFET, a synchronous rectifier (SR), an inductor, a switching frequency control oscillator (FCO) and many other components to create an efficient circuit. The SR is switching in sync with the SenseFET, thus a stable output voltage is achieved. The fresh start process is used to ensure the output voltage reaches its setpoint quickly. The low-side SenseFET is turned on to transfer energy between the input and output, and the inductor provides high DC gain during the process. During SMPS operation, the current consumption of the power IC is relatively small and hence its power dissipation is low.

To conclude, TPS61097-33DBVR is a high-performance, synchronous step-down DC/DC converter with a wide input voltage range, low power consumption and adjustable current limit protection. It is widely used in mobile applications due to its fast transient response, low noise and user programmable functions. The highly integrated design and its built-in protection circuits make the TPS61097-33DBVR an ideal choice for powering low power system.

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