TPS622310DRYR

TPS622310DRYR Application Field and Working Principle

The TPS622310DRYR is a 1A, low output voltage synchronous step-down DC-DC converter of the TI Triple Play family. It belongs to a line of switching regulators or buck converters, a type of a regulated DC power supply. This family of DC-DC converters is capable of providing up to one amp output current with small footprints. The TPS622310DRYR is specially designed for applications demanding a small board space and low output voltage regulation, and is an ideal choice for high-end applications such as notebooks, LCDs, and point-of-load applications.

The TPS622310DRYR uses a synchronous step-down architecture that provides higher efficiency at light loads when compared to traditional asynchronous buck converters. The synchronous architecture also allows for lower output-voltage ripple and higher power density. Furthermore, the device has adjustable current limits, as well as soft-start and thermal protection features. These features enable improved safety and performance in applications such as laptops and set-top boxes.

The TPS622310DRYR is a step-down switching regulator with a non-inductive current limit, a maximum input voltage of 20V, it operates in an adjustable output voltage range of 0.9V to 5.5V, and a maximum output current of 1A. The switch resistor, or timing resistor, is used to decide the duration of time (in nanoseconds) of each operating cycle. The output voltage is regulated by comparing the voltage of an internal reference against the feedback voltage.

The device utilizes two 30V N-channel power MOSFETs working in synchronous mode. When the device is ON, the top MOSFET is ON, allowing current to flow from the Input to the Output. At the same time, the bottom MOSFET is ON and allows current to flow from the GS terminal to the Input, thus offsetting the input current ripple. The actual switching frequency is internally set and can be adjusted using an external compensation network, allowing for a low output-ripple voltage and low output current rating.

The device features two functions for power savings: the Pulse-Skip Mode and the Forced PWM Mode. The Pulse-Skip Mode reduces the switching frequency when the input current is low, while the Forced PWM Mode reduces the duty cycle of the switching transitions to save power at light loads. The combination of all these features generates a device that is capable of maintaining and automatically controlling the output voltage while saving power.