TPS76501-Q1

www.ti.com TPS76501-Q1 ULTRALOW QUIESCENT CURRENT 150-mA LOW-DROPOUT VOLTAGE REGULATOR SLVS800 – DECEMBER 2007 FEATURES 1 Qualified for Automotive Applications 150-mA Low-Dropout (LDO) Voltage Regulator Dropout Voltage to 85 mV (Typ) at 150 mA (TPS76550) Ultra-Low 35-µA (Typ) Quiescent Current 3% Tolerance Over Specified Conditions for Fixed-Output Versions Open-Drain Power Good Output Thermal Shutdown Protection FB PG GND EN D PACKAGE (TOP VIEW) 1 8 2 7 3 6 4 5 OUT OUT IN IN DESCRIPTION/ORDERING INFORMATION This device is designed to have an ultra-low quiescent current and be stable with a 4.7-µF capacitor. This combination provides high performance at a reasonable cost. Because the PMOS device behaves as a low-value resistor, the dropout voltage is very low (typically 85 mV at an output current of 150 mA for the TPS76550) and is directly proportional to the output current. Additionally, since the PMOS pass element is a voltage-driven device, the quiescent current is very low and independent of output loading (typically 35 µA over the full range of output current, 0 mA to 150 mA). These two key specifications yield a significant improvement in operating life for battery-powered systems. This LDO also features a sleep mode; applying a TTL high signal to EN (enable) shuts down the regulator, reducing the quiescent current to less than 1 µA (typ). Power good (PG) is an active-high output, which can be used to implement a power-on reset or a low-batte...