TPS51222RTVT

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Texas Instruments’ TPS51222RTVT is a highly integrated synchronous buck regulator. The device is designed to easily convert an input voltage source from 4.5V to 5.5V to produce a stable regulated output voltage as low as 0.6V at a load current of up to 6A. The device is ideal for applications such as graphics cards, gaming consoles, disk drives, and other power-hungry systems.

The TPS51222RTVT is a highly integrated, cost-effective synchronous buck regulator featuring a high efficiency topology with high current capabilities. The device integrates rugged 10A N-Channel MOSFETs and two sensing channels to enable very low component count designs. It also includes protective features such as output over-current protection, input under-voltage lockout and temperature protection. The device also enables programmable over-current protection of the switch and synchronous FETs.

The TPS51222RTVT operates as a voltage regulator in a variety of applications. In a buck regulator configuration, the device controls the voltage by producing PWM signals to the switch and synchronous rectifier FETs. The device senses the output current and utilizes hysteretic mode for controlling the output voltage. On time is added to the regulator based on the voltage drop across the sense resistor and the input voltage. The output voltage is also adjustable via an external resistor divider.

The TPS51222RTVT is available in a small 2.1-mm x 3.0-mm package. The device offers an input voltage range of 4.5V to 5.5V and a regulated output voltage as low as 0.6V. The device includes two sensing channels that can be programmed to sense the output voltage or current and has the capability to generate 1.5V and 2.5V reference voltages. The regulator also includes a programmable soft-start in both burst and cycle-by-cycle current limiting mode.

The TPS51222RTVT is also designed to achieve high efficiency, low ripple and low noise with its integrated synchronous buck converter, allowing for a wide range of operating temperature. The device is ideal for applications requiring a stable regulated voltage at high currents, such as graphics cards, gaming consoles, disk drives, and other power-hungry systems.

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