This data sheet introduces the features of the ADP5041 Micro PMU, including input voltage range, output voltage range, operating frequency, efficiency and power consumption.
The ADP5041 combines a high‑performance 1.2 A buck regulator and two 300 mA low‑dropout regulators in a compact 20‑lead LFCSP package. It offers a wide input range of 2.3 V‑5.5 V, up to 96 % peak efficiency, and includes supervisory, watchdog and manual reset functions for microprocessor‑based systems.
The device provides selectable buck modes (forced PWM or power‑save PWM/PSM), programmable output voltages via external resistor dividers, and extensive protection features such as over‑current, thermal shutdown, and undervoltage lockout. Detailed pin descriptions, recommended external components, and factory‑programmable options are included.
| Input voltage range (AVIN) | 2.3 V to 5.5 V |
|---|---|
| Buck regulator output current | 1.2 A |
| LDO output current (each) | 300 mA |
| Buck switching frequency | 3 MHz |
| Peak efficiency (buck) | up to 96 % |
| Buck output voltage range | 0.8 V to 3.8 V |
| LDO output voltage range | 0.8 V to 5.2 V |
| Operating temperature range | -40 °C to +125 °C |
The device operates from 2.3 V to 5.5 V on the AVIN supply.
The ADP5041 includes two LDO regulators, each capable of delivering 300 mA.
Option 0 provides a timeout of 81.6 ms to 122.4 ms; Option 1 provides 1.28 s to 1.92 s.