The TPS799-Q1 LDO regulator combines the high performance required of many RF and precision analog applications with ultra-low current consumption. High PSRR is provided by a high gain, high bandwidth error loop with good supply rejection at very low headroom (V_IN – V_OUT). Fixed-voltage versions provide a noise reduction pin to bypass noise generated by the band-gap reference and to improve PSRR while a quick-start circuit fast-charges this capacitor at start-up. The combination of high performance and low ground current also make the TPS799-Q1 designed for portable applications. All versions have thermal and overcurrent protection and are fully specified from –40°C to +125°C.

Figure 8-1 shows the basic circuit connections for fixed-voltage model. Figure 8-2 gives the connections for the adjustable output version (TPS79901-Q1). R₁ and R₂ can be calculated for any output voltage using the formula in Figure 8-2. Sample resistor values for common output voltages are shown in Figure 8-2.