ADP2140ACPZ1833R7 Application Field and Working Principle

ADP2140ACPZ1833R7 is a linear-switching voltage regulator IC manufactured by ADI, targeting 3.3V point-of-load (PoL) power supply with low noise and high efficiency. This IC can improve the stability, accuracy, and complexity of power management and voltage regulation across automotive, consumer, and industrial applications.

Application Field

ADP2140ACPZ1833R7 integrates a high-efficiency low-ripple synchronous rectifier to reduce ripple and an adjustable low-pass filter for transient response optimization. It supports input voltage range from 4.5V to 12V and output current greater than 1.3A. Therefore, ADP2140ACPZ1833R7 is suitable for energy-efficient 3.3V PoL power supply used in handheld devices, cameras, tablets and portable applications such as automotive navigation systems, automotive digital audio, automotive instrument clusters, sports controllers, power amplifiers and more.

Working Principle

ADP2140ACPZ1833R7 enables a buck regulator to transition between discrete linear and synchronous rectified modes. The transition between linear and switching mode is determined by an external load current threshold. When the load current level is lower than the threshold, the IC operates in linear mode to regulate the output voltage and reduce power dissipation. When the load current exceeds the threshold, the IC will transitions from linear to switched mode operation. This switching occurs to maintain steady voltage regulation and improve power supply efficiency.

The linear operation mode of ADP2140ACPZ1833R7 allows for steady voltage regulation with low noise and low output voltage ripple with use of an external resistor divider to set the output voltage. In switching mode, the IC provides up to 44% higher power efficiency while enabling rapid transient response along with transient protection.

Additionally, the IC features more protections such as overvoltage protection and power-on reset to help protect the IC under abnormal supply conditions. With package size of only 3 mm x 3 mm, ADP2140ACPZ1833R7 is a great solution for low power, wide input voltage, and high accuracy point-of-load (PoL) 3.3V applications.

Conclusion

ADP2140ACPZ1833R7 is a linear-switching voltage regulator IC designed for 3.3V PoL power supply, with wide input voltage range from 4.5V to 12V, high load current greater than 1.3A, and low output voltage ripple. It is suitable for energy-efficient and low-noise applications in automotive, consumer and industrial fields. The IC features dual-mode operation, transient protection, and additional protection features, making it a great solution for 3.3V PoL applications.