How to Design a Dual-Mode LDO for Battery-Powered Devices | ADPL40505AEVKIT#
Battery-powered devices operate in two very different states. In active mode, the load swings to hundreds of milliamps. In standby, the system is idle, but the regulator is still drawing quiescent current every hour from your battery. Designing a single power rail that handles both states efficiently is one of the core challenges in portable power design.
In this video, we walk through seven specific aspects of designing with a dual-mode LDO using the ADPL40505A evaluation kit from Analog Devices. Every figure, waveform, and calculation comes directly from the datasheet and eval board user guide. Topics covered include dual operating modes and quiescent current, MODE transition timing, output voltage configuration, noise and PSRR, protection features, thermal design, and a hands-on hardware demo.
Resources:
- ADPL40505A Datasheet: https://www.analog.com/en/products/adpl40505a.html
- ADPL40505AEVKIT User Guide: https://www.analog.com/en/resources/evaluation-hardware-and-software/evaluation-boards-kits/adpl40505aevkit.html
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