The ADP5040 is a high-performance micro power management unit (PMU) that integrates a 1.2A buck regulator and two 300mA low dropout regulators
The ADP5040 is a mixed‑signal power management IC that combines a high‑performance 1.2 A buck regulator with two 300 mA low‑dropout regulators (LDOs) in a compact 20‑lead 4 mm × 4 mm LFCSP package. It offers a wide input voltage range, over‑current and thermal protection, soft‑start, and undervoltage lockout, making it suitable for portable and battery‑powered devices.
The document provides detailed specifications such as input and output voltage ranges, switching frequency, efficiency, and PSRR, as well as pin configurations, typical performance curves, recommended external components, and thermal considerations. It also includes a functional block diagram, layout guidelines, and a bill of materials for designers.
| Input voltage range | 2.3 V to 5.5 V |
|---|---|
| Buck regulator output voltage range | 0.8 V to 3.8 V |
| LDO output voltage range | 0.8 V to 5.2 V |
| Switching frequency | 3 MHz |
| Peak efficiency | up to 96 % |
| Package | 20‑lead 4 mm × 4 mm LFCSP |
The ADP5040 operates with an input voltage from 2.3 V to 5.5 V.
The device contains two 300 mA low‑dropout regulators.
The EN1 pin enables the buck regulator; high turns it on, low turns it off.
The MODE pin selects forced PWM mode or auto PWM/PSM (power‑save) mode for the buck regulator.