TPS53126PW

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TPS53126PW is a synchronous buck voltage controller, primarily designed for high-current, high-efficiency synchronous buck converters. It is a member of the TPS53126 family of high-precision, low-power and low-noise voltage controllers. The TPS53126PW is targeted at a wide variety of applications such as embedded systems, mobile phones, and portable electronic devices.

The aim of using the TPS53126PW is to deliver power to a load while maintaining both efficient and reliable operation. It helps in reducing standby operating current, which is less than 0.5uA, and allowing improved voltage and ripple accuracy. The TPS53126PW improves power efficiency as compared to linear voltage regulators by utilizing a DC-DC switching controller. This is done via alternating between a high and a low-side switching element and then storing the excess energy in an output capacitor.

The device enables a high average power transfer from the input voltage to the output voltage and is usually used in applications such as DC-DC converters, battery chargers and RGB LED drivers.

The device operates in either voltage-mode or hysteretic-mode with an internal oscillator that supports a wide signal frequency range. In addition to providing precision output voltage regulation, the TPS53126PW provides a variety of features such as programmable over-current protection, input under-voltage lockout, and thermal shutdown with programmable hysteresis.

The TPS53126PW contains a PWM controller, a current shunt amplifier, an under-voltage lockout, a soft-start circuit, an adjustable internal oscillator, input-failure detector and a temperature-sensing circuit. It also includes several protection circuits such as an over-voltage protection, an over-temperature protection and a short-circuit protection.

The PWM controller and the current shunt amplifier comprise the primary components in the TPS53126PW. The PWM controller compares an input voltage (VIN) and a feedback voltage (VFB) to generate the PWM control signal; the power switch is turned on /off accordingly. The current shunt amplifier senses the output current (IOUT) and compares it with a current sense voltage (ITH). If the output current is higher than the current sense voltage, the current shunt amplifier turns off the power switch and the output current will gradually decrease.

The device also features a programmable over-current protection, which is set to a certain voltage level to ensure the efficiency of the system. When the output current is higher than the over-current protection threshold, the power switch can be turned off to protect the device from over-current.

The TPS53126PW also features an adjustable internal oscillator that allows control of the switching frequency over a wide range of frequencies. This feature helps reduce the size and cost of the system. In addition, the device offers a programmable soft-start circuit. This feature gradually increases the output voltage from zero to the desired level, thus preventing inrush current from occurring.

The device also has an input under-voltage lockout circuit to protect the load from the input voltage being too low. The device has a wide input voltage range, allowing it to be used in applications that require a wide input voltage range. Finally, the device also has a temperature sensing circuit that helps regulate the operation of the device by limiting the maximum power dissipation.

In conclusion, the TPS53126PW is a high-efficiency voltage controller specifically designed for DC-DC buck converters and other power-supply applications. The device offers a wide range of features, such as programmable over-current protection, input under-voltage lockout, adjustable internal oscillator, programmable soft-start and thermal shutdown with programmable hysteresis. These features make it an ideal choice for power-supply applications that require high efficiency and reliable operation.

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