TPS40041DRBT Integrated Circuits (ICs)

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TPS40041DRBT is a high speed current mode synchronous buck controller with very low system cost. It offers best-in-class transient response for quick load changes. This device is designed for high efficiency, fast transient response and low output ripple power-supply solutions including those commonly used in battery applications. The TPS40041DRBT is part of a family of high performance synchronous buck controllers with a comprehensive range of features for a wide variety of applications.

The TPS40041DRBT is designed for power-over-Ethernet (PoE) and other DC/DC applications as well as other mixed-signal applications to provide precision voltage regulation and excellent transient response over a wide input voltage range. It features adjustable current limits, a full voltage range of detection, wide output voltage range, adjustable switching frequency, and provides faults such as undervoltage, overvoltage and overcurrent protection.

The primary application fields of the TPS40041DRBT are power systems ranging from enterprise and telecom networks to notebook computers, personal digital assistants (PDAs) and digital cameras. The TPS40041DRBT provides a very low output ripple for these applications, resulting in better system calibration when coupled with a low ESR output capacitor. It is also used to design efficient power supplies with fast transient response and wide input ranges.

The working principle of the TPS40041DRBT is based on the principle of switching system. It uses switching transistors to directly switch the supply voltage Vcc to the output voltage Vout in such a way that the output voltage follows Vcc with a fixed ratio, once the switching frequency is selected. The TPS40041DRBT provides voltage control with a current mode control loop and a small-signal compensation network. The current loop is used to control the average inductor current and the voltage loop is used to control the output voltage.

The TPS40041DRBT features an internal low on-resistance, power PMOSFET. It operates up to 4.5A of sourcing current with an adjustable current limit. It also features a power-on reset circuit and an overvoltage protection circuit, which protects the device during sudden voltage transients or incorrect startup conditions.

Overall, the TPS40041DRBT is an ideal solution for high-efficiency, fast transient response and low output ripple DC/DC converter design. It has wide input voltage range, adjustable current limit and full voltage protection system, making it suitable for applications such as power-over-Ethernet (PoE), notebook computers, personal digital assistants (PDAs) and digital cameras.

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