Capless Low Drop Out 100mA Regulator - TSMC 65nm LP

The S3REGC10014T65LD is a capless regulator circuit which has been designed to provide 1.1-3.0V with a load current of up to 100mA. The output voltage is programmable in 100mV steps.

No external capacitor is required; the regulator’s architecture has been designed so that it is stable without such an external capacitor, yet yielding a small area while consuming low ground current and allowing low-drop operation.

The S3REGC10014T65LD features an automatic feedback sensing option to maintain a constant regulated output voltage level. It has been designed to provide a stable output in both low-drop and high-drop operation, while maintaining minimum ripple on supply lines in the presence of large load current spikes inherent with switching loads, e.g. pipeline ADCs. The S3REGC10014T65LD uses 2.5V thick oxide devices from a standard 65nm logic process. The circuit can be scaled for a range of load currents and capacitances.

As no external capacitor is needed, the S3REGC10014T65LD capless regulator can provide savings in terms of package pins and discrete capacitors, allowing reduced BOM costs and higher system reliability. It can be particularly useful if the IC design is ‘pad limited’. The S3REGC10014T65LD is readily portable to any similar manufacturing process or can be customised for specific customer requirements and it’s designed with the Deep-Nwell process option.