TPS54202HDDCR Integrated Circuits (ICs)

Introduction

The TPS54202HDDCR is a high-efficiency, ultra low-quiescent current synchronous step-down regulator targeted for small form factor and handheld devices. It features a unique combination of low external component count, wide input voltage range, high efficiency and high current output in a very small package. With a power stage design based on TI’s advanced high-voltage power architecture, the TPS54202HDDCR delivers up to 2A of continuous load current, while providing extremely high power conversion efficiency.

Application Field

The TPS54202HDDCR is designed for applications where size and efficiency considerations are critical. Typical applications include telecom and networking, industrial, medical and general purpose applications that use a regulated DC power bus. It is suitable for a wide range of voltage sources, including 12V industrial supplies, 5V and 12Vac wall adapters and other high voltage capacitor-based power supplies.

Working Principle

The TPS54202HDDCR uses a unique combination of a voltage-mode control system and synchronous rectification to optimize conversion efficiency while minimizing dynamic output voltage ripple. The synchronous rectifier gives the TPS54202HDDCR high efficiency across all load levels. Operation is based on the voltage-mode, asynchronous pulse-width-modulated (PWM) control system. This system uses an internal voltage reference, an error amplifier and a comparator, which use positive feedback to maintain a constant output voltage. The PWM converter regulates the input voltage to accurately maintain the required output voltage. The output voltage is monitored by a voltage feedback loop, which allows the output to remain within a specified tolerance from line-voltage and load-current variation.

Conclusion

The TPS54202HDDCR is a high-efficiency, ultra-low quiescent current synchronous step-down regulator targeted for small form factor and handheld devices. It features a unique combination of low external component count, wide input voltage range, high efficiency and high current output in a very small package. With a power stage design based on TI’s advanced high-voltage power architecture, the TPS54202HDDCR delivers up to 2A of continuous load current, while providing extremely high power conversion efficiency.