TPS51285BRUKT Integrated Circuits (ICs)

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The TPS51285BRUKT is a tiny, synchronous, step-down, microprocessor core voltage regulator that provides up to 3A of output current. It features integrated MOSFETs for high efficiency, low off-time, fast-transients and EMI-reduced operation. It is designed for applications requiring ultra low noise and ultrafast transient response. The device also features an asynchronous single-end topology optimized for low noise/low interference in between family cycle-by-cycle current limit, adjustable soft-start, adjustable output voltage and adjustable current limit.

The TPS51285BRUKT is categorized into PMIC - Voltage Regulators - Linear + Switching since it combines both the linear and the switching (pulse-width-modulation (PWM)) regulators. The linear regulator consists of three stages : voltage regulation, current regulation and temperature regulation. The voltage regulator is a low-dropout (LDO) type with a fast response and low noise operation. The current regulator adjusts the output current in response to changes in load and reduces the voltage drop across the load. The temperature regulator is responsible for automatically regulating the output current in order to maintain a safe operating temperature of the device and to prevent it from overheating.

The switching regulator consists of two stages — the high-speed converter and the low-noise switcher. The high-speed converter, often referred to as a Pulse Width Modulated (PWM) regulator, consists of a switching transistor (or FET) which turns on and off quickly to regulate the output voltage. This voltage regulator offers a much higher efficiency compared to a linear regulator. The low-noise switcher, often called an inductive post-regulator, is designed to reduce the EMI and RFI noise generated by the PWM regulator.

The TPS51285BRUKT is designed to enable designs to operate with an efficiency rate up to 90%. With a low quiescent current of just 31 μA, the TPS512SKRUKT provides extremely low power consumption. The main application fields include industrial, consumer, medical and automotive. This component is mainly used in power supplies, processors, dc/dc converters, battery charging and DC motors.

The TPS51285BRUKT is also equipped with advanced protection features, such as thermal protection, cycle-by-cycle current limit, input undervoltage locking and output over voltage protection. All these features are designed to protect the device, the supply and the load from damage due to high temperature, overcurrent conditions and overvoltage. The TPS51285BRUKT is an ideal solution for cost effective and low risk implementation of synchronous step-down DC/DC converters in a wide range of applications.

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