The TPS7A74 is a low-input, low-output, low-quiescent-current linear regulator optimized to support excellent transient performance. This regulator uses a low-current bias rail to power all internal control circuitry, allowing the n-type field effect transistor (NMOS) pass transistor to regulate very-low input and output voltages.

Using an NMOS-pass transistor offers several critical advantages for many applications. Unlike a p-channel metal-oxide-semiconductor field effect transistor (PMOS) topology device, the output capacitor has little effect on loop stability. This architecture allows the TPS7A74 to be stable with any ceramic capacitor 10 μF or greater. Transient response is also superior to PMOS topologies, particularly for low V_IN applications.

The TPS7A74 features a programmable voltage-controlled, soft-start circuit that provides a smooth, monotonic start-up and limits start-up inrush currents that can be caused by large capacitive loads. An enable (EN) pin with hysteresis and deglitch allows slow-ramping signals to be used for sequencing the device. The low V_IN and V_OUT capability allows for inexpensive, easy-to-design, and efficient linear regulation between the multiple supply voltages often required by processor-intensive systems.