TPS622319DRYR

PMIC - Voltage Regulators - DC DC Switching Regulators

The TPS622319DRYR is a step-down DC-DC converter that belongs to the newest generation of PMIC voltage regulators. This device operates at a relatively high frequency for the most efficient power conversion rate and helps minimize the size of external components. The TPS622319DRYR can deliver up to 1.2A of output current from an input range of 2.3V to 5.5V.

Application Field and Working Principle

This device is ideal to be used in many different applications, including in mobile phones, smartphones, portable navigation systems, digital cameras, and other portable electronic devices that require low power and high efficiency. It is also great for low-power sensing and microprocessor-based systems.

The TPS622319DRYR works on a principle that is mainly based on a hysteretic control. The switch is directly driven by the control loop, which monitors the output voltage to maintain the desired output voltage. When the output voltage drops lower than the reference voltage, the switch is turned on to switch from the higher voltage supply to the lower one, thus creating the step-down DC-DC conversion. During the switch-on phase, the output voltage rises due to inductor current pre-charge, until the voltage reaches the reference voltage.

The device has two control circuits on the chip, namely an adjustable current limit and an adjustable soft-start. The adjustable current limit allows the designer to set the operating conditions for the application for efficient power conversion. The adjustable soft-start limits the inrush current at startup. An internal compensation loop helps to maintain good line and load regulation.

Furthermore, the TPS622319DRYR offers a wide range of protection features, including over-temperature protection (OTP), short circuit protection (SCP), under voltage lockout (UVLO), and over current protection (OCP). The OCP limits the maximum current drawn by the device, while the UVLO prevents the current from flowing if the input voltage is lower than the set level. Finally, the SCP prevents any damage to the device due to short circuit.

Conclusion

The TPS622319DRYR is a step-down DC-DC converter that provides excellent power conversion efficiency and helps minimize the size of external components. It is an ideal choice for portable applications and is also suitable for low-power sensing and microprocessor-based systems. The device features several protection features such as OTP, SCP, UVLO, and OCP, making it very reliable in operation.