**TPS7A4501 Description :** The TPS7A45xx devices are low-dropout (LDO) regulators optimized for fast transient response. The device can supply 1.5 A of output current with a dropout voltage of 300 mV. Operating quiescent current is 1 mA, dropping to less than 1 µA in shutdown. Quiescent current is well controlled; it does not rise in dropout, as with many other regulators. In addition to fast transient response, the TPS7A45xx regulators have very low output noise, which makes them ideal for sensitive RF supply applications. Output voltage range is from 1.21 V to 20 V. The TPS7A45xx regulators are stable with output capacitors as low as 10 µF. Small ceramic capacitors can be used without the necessary addition of ESR, as is common with other regulators TPS7A4501 Features: *Optimized for Fast Transient Response *Output Current: 1.5 A *High Output Voltage Accuracy : 1% at 25°C *Dropout Voltage: 300 mV *Low Noise: 35 µVRMS (10 Hz to 100 kHz) *High Ripple Rejection: 68 dB *1-mA Quiescent Current *No Protection Diodes Needed *Controlled Quiescent Current in Dropout *Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V *Adjustable Output from 1.21 V to 20 V *Less Than 1-µA Quiescent Current in Shutdown *Stable with 10-µF Output Capacitor *Stable with Ceramic Capacitors *Reverse-Battery Protection *No Reverse Current *Thermal Limiting APPLICATIONS *3.3-V to 2.5-V Logic Power Supplies *Post Regulator for Switching Supplies