The ADP5042 is a 0.8A switching regulator from Analog Devices. It is available in a 20-lead LFCSP package and has an input voltage range of 2.3V to 5.5V. The output current is 0.8A and it has two 300mA LDOs. It supports soft start, overcurrent protection, undervoltage lockout, open drain processor reset with threshold monitoring, dual watchdog, etc.
The ADP5042 micro power‑management unit integrates a high‑frequency buck regulator and two low‑dropout regulators in a compact 20‑lead LFCSP package. It provides supervisory functions, dual watchdog timers and programmable output voltages, making it suitable for portable and battery‑powered devices.
The datasheet details electrical specifications, pin functions, thermal characteristics and recommended external components. It also includes application guidelines, layout recommendations and an evaluation‑board schematic to aid designers in implementing the device.
| Input voltage range | 2.3 V to 5.5 V |
|---|---|
| Buck regulator current rating | 0.8 A |
| LDO current rating | 300 mA each |
| Buck switching frequency | 3 MHz |
| LDO dropout voltage (300 mA load) | 150 mV |
| Output noise (Vout = 2.8 V) | 110 pV rms typical |
The device operates from 2.3 V to 5.5 V.
The LDOs have a dropout voltage of 150 mV when delivering 300 mA.
The buck regulator operates at a typical frequency of 3 MHz.
It generates about 110 pV rms typical output noise at a 2.8 V output.