The new AP3405 from Diodes Incorporated is a DC-DC buck converter which operates at high efficiency under light and heavy loads, helping system designers to extend battery run-times in mobile and wearable devices.
In quiescent mode, the converter draws a current of just 32μA, and its internal MOSFETs feature low on-resistance for reduced conduction losses under all load conditions.
Operating at a fixed switching frequency of 2MHz, the AP3405 allows for the use of small external components. Its U-DFN2020-8 package also has a small board footprint. A current-mode, synchronous buck converter, the AP3405 provides a fast response to transient voltage events, and offers cycle-by-cycle current limiting.
It operates from a 2.3V to 5.5V input-voltage range, and supplies an output ranging from 0.7V to 5.5V accurate to ±1.5%. It supplies loads up to 600mA.
Comprehensive protection features built into the AP3405 protect both the end system and the device itself.
- Wearable devices
- Battery-powered equipment
- Up to 95% efficiency
- Short-circuit protection
- Under-voltage lock-out
- Over-temperature protection
- Over-current protection
- Soft-start function