TPS65105RGER

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PMIC – Voltage Regulators – Special Purpose refers to the application of the TPS65105RGER, a single-chip synchronous buck voltage regulator designed for system power applications. This chip integrates a high frequency switching conversion regulator, providing a neat and tidy solution for regulating a single output voltage, with a high efficiency level.

Applications: The TPS65105RGER device is a single-chip power management solution providing a regulated output voltage ranging from 0.8V to 5V, and with an output current of up to 3A. Its high frequency operation and highly integrated architecture makes it ideal for space-constrained applications such as notebooks, PDAs and other mobile devices that require a compact solution.

Features: The TPS65105RGER is highly efficient, providing a supply voltage range of 4.5V to 25V, output voltage range from 0.8V to 5V, and a power good status indicator to alert the user when the output is outside acceptable limits. The single chip also features an adjustable rise and fall times for the output voltage, a peak current limit and soft-start ramp up control. Furthermore, the integration of low RDS(ON) and low ESR MOSFETs reduces the thermal stress on the device, making it more reliable and rugged.

Working Principle: The TPS65105RGER is a synchronous buck voltage regulator. This type of regulator is typically used in the current-limited step-down switching conversion process. It uses low-side power MOSFETs, switches and a current feedback amplifier to supply a load with a regulated output voltage. The device also contains a bunch of fast responding control signals to ensure high-performance regulation. The MOSFETs are switched on and off at high frequency, allowing the power to be converted from the input to the output. This switching frequency can be adjusted with a frequency adjust pin that can be set from 20kHz to 2MHz. To protect against over current and over-temperature conditions, the device includes over-current protection and thermal-shutdown features. The feedback loop is used to continually measure the output voltage and balance the output with the input voltage.

Conclusion: The TPS65105RGER is a highly efficient single-chip voltage regulator designed for system power applications. Its on-board features and integrated architecture makes it suitable for a wide range of applications where space is limited, such as notebooks, PDAs and other mobile devices. This is a synchronous buck voltage regulator which switches the power from the input to the output at a frequency that can be adjusted with a frequency adjust pin. Over-current protection and thermal-shutdown features ensure system safety.

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