The ADP2125 from Analog Devices Inc. is a high-performance, synchronous, step-down DC-DC regulator that delivers up to 1.25A of continuous output current. This regulator operates at an input voltage range from 2.3 V to 5.5 V, making it ideal for a wide variety of applications, including battery-powered devices, point-of-load conversions, and general-purpose power regulation.

With its ultra-low quiescent current, the ADP2125 is particularly well-suited for portable and battery-operated equipment, where power efficiency is paramount. The device ensures extended battery life with its 38 μA quiescent current in light load mode, and a mere 0.1 μA in shutdown mode.

The ADP2125 boasts a high efficiency of up to 95%, thanks to its integrated synchronous rectification and its ability to operate in PWM mode at heavy loads, and in PFM mode at light loads to minimize quiescent current. This dynamic mode transition contributes to optimal power efficiency across various load conditions.

Featuring a fixed frequency operation at 3 MHz, the ADP2125 allows for the use of small, low-cost inductors and capacitors, resulting in a compact, space-saving solution. Additionally, the regulator offers a range of programmable features, including soft start and selectable overcurrent protection, which enhances the flexibility and reliability of the system design.

The device also includes other protective features such as overvoltage protection, thermal shutdown, and under-voltage lockout, ensuring the safety and stability of your power supply design. The ADP2125 comes in a small 16-lead LFCSP package, which is ideal for space-constrained applications.

In summary, the ADP2125 from Analog Devices is a versatile and efficient power management solution that combines low quiescent current with high efficiency and a rich feature set to meet the stringent requirements of modern electronic devices.

Key Features:

• Input voltage range: 2.3 V to 5.5 V
• Output current: Up to 1.25A
• Ultra-low quiescent current: 38 μA
• Shutdown current: 0.1 μA
• High efficiency: Up to 95%
• Fixed frequency operation: 3 MHz
• Programmable soft start
• Overcurrent protection
• Overvoltage protection
• Thermal shutdown
• Under-voltage lockout
• Compact 16-lead LFCSP package