Ultra-low drop-out regulators output 500 mA

September 11, 2015 // By Graham Prophet
Claiming lowest-available ratings for drop-out voltage in regulation, these LDOs from Toshiba are aimed at power management applications in smartphones, tablets and other battery operated devices including wearables.

To increase efficiency of these LDOs special attention has been given to minimising their drop-out voltage at high output current and low output voltage operation. The TCR5AM series achieve an ultra-low dropout voltage by adopting a secondary bias voltage supply (V BAT) as a reference voltage. Applying V BAT=3.3V enables a 0.6V output voltage operation with typical dropout voltages as low as 0.090V (@ I OUT=300 mA) and 0.150V (@ I OUT=500 mA). This performance makes the TCR5AM series suitable for high-current loads (such as RF or camera circuits) in battery operated designs.

The TCR5AM series includes integrated protection features such as over-current and over-temperature protection as well as under-voltage lock-out and auto output discharge functions. They come in the ultra-small DFN5B package (1.2 x 1.2; t: 0.38 mm) with 600 mW power dissipation. As the LDO can be mounted with small ceramic input and output capacitors it is suitable for high-density board assemblies.

Toshiba; www.toshiba.semicon-storage.com