Tiny LDO voltage regulator boasts low quiescent current and no capacitors

Date
01/09/2013

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Tiny LDO voltage regulator boasts low quiescent current and no capacitors

With a voltage range from 1.4V ~ 6.0V at an ultra-low supply current of only 0.6?A, the XC6504 Series LDO voltage regulator from Torex has an output voltage selectable from 1.1V ~ 5.0V in 100mV increments with an output current of up to 150mA. The XC6504 consists of a reference voltage supply, error amplifier, driver transistor, over-current protection circuit, and a phase-compensation circuit. A ceramic or other low ESR capacitor can be used for CL, but the internal phase compensation enables stable operation even without CL. The IC is put in the stand-by mode by inputting an L' level signal to the CE pin, reducing the supply current to 0.01?A or less. In the stand-by mode, the electrical charge on CL (if used) can be discharged by an internal switch to quickly return the IC to the VSS level. The accuracy of output voltage at the light loads that are commonly used with low supply current LDOs have been improved. Even at an output current IOUT of 1mA or less, the fluctuations of output voltage with respect to output current are very small, and the increases of output voltage are minimal even at high temperatures. The XC6504 is available in a USPN-4B02 package measuring 0.75mm x 0.95mm x 0.4mm, as well as in standard SSOT-24 and SOT-25 packages. Torex Europe.

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