TPS613222ADBVT

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PMIC - Voltage Regulators - DC DC Switching Regulators

The TPS613222ADBVT voltage regulator is an innovative miniature DC-DC Buck (step-down) switching regulator that can provide up to 1.2A of continuous output current. It utilizes the patented valley-lock and current-balance control schemes to ensure high efficiency over a wide operating temperature range. The compact wafer-level package (WLP) is ideal for space-constrained applications.

The device is capable of providing an output voltage of up to 12V with a typical efficiency of up to 90 percent. It is offered in a Pb-free and Environmentally Friendly package. The wide switching frequency range, up to 1.8MHz, allows for a versatile design depending on the application. The valley-lock and current-balance control schemes make the device a dependable and low noise solution along with low and high-side MOSFETs with very low RDS(ON) values.

The TPS613222ADBVT voltage regulator can be used to drive a wide array of applications such as OLED and LCD displays, DC-DC converters, array controllers, PLCs, medical instrumentation and imaging equipment, motor drives, industrial controllers, power over Ethernet, intelligent lighting and variable speed drives. There are two package options, a 7-pin WLP with 0.065μmA quiescent current, and a 5-pin WLP with 0.035μmA quiescent current. This device also features an adjustable Under-Voltage Lock-Out (UVLO) feature that can be used to protect against an unexpected voltage drop.

Working principle

In the TPS613222ADBVT voltage regulator, the current-balance and valley-lock control schemes are used to achieve high efficiency. The valley-lock scheme works by balancing the input and output currents to effectively manage switching loss. The current-balance works by providing precision current control to balance the input and output currents over the entire load range. The combination of these two schemes further improves efficiency by eliminating any potential for conduction losses.

The device operates by integrating a pair of low-side and high-side MOSFETs that are driven by a valley-lock oscillator. The valley-lock oscillator sets up a triangle waveform with a predefined duty cycle; this triangle waveform controls the gate of the high and low-side MOSFETs alternately as it flips back and forth. The duty cycle is held constant to maintain the output voltage, while the current-balance feature helps to adjust the current level. When the line enters a valley, the low-side MOSFET is turned off, causing the high-side MOSFET to remain on for a longer duration and resulting in an increase in output voltage.

The TPS613222ADBVT voltage regulator also has a built-in Under-Voltage Lock-Out (UVLO) feature. This feature prevents the output voltage from dropping below a predetermined threshold, thereby protecting the device from damage due to unexpected line drops. The device\'s soft start feature reduces peak inrush current, allowing for a smoother start-up.

Conclusion

The TPS613222ADBVT voltage regulator is a compact, efficient, and low-power solution for various switching applications. Its innovative features make it suitable for use in demanding applications, such as OLED and LCD displays, DC-DC converters, array controllers, PLCs, medical instrumentation and imaging equipment, motor drives, industrial controllers, power over Ethernet, intelligent lighting and variable speed drives. It is offered in a Pb-free and Environmentally Friendly package and is optimised for space-constrained applications.

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