SPX2945

www.DataSheet4U.com ® SPX2945 400mA Low Dropout Voltage Regulator with Shutdown FEATURES ■ Output 3.3V, 5.0V at 400mA Output ■ Very Low Quiescent Current, 100µA ■ Low Dropout Voltage, 420mV at 400mA ■ Extremely Tight Load and Line Regulation ■ Very Low Temperature Coefficient ■ Current & Thermal Limiting ■ Error Flag Warns Of Output Dropout ■ Logic-Controlled Electronic Shutdown ■ Output Programmable From 1.24V to 20V (for SO-8) VIN IN OUT ON SHUTDOWN INPUT OFF +VIN 100K 8 +VIN VOUT + 7 R1 0.01µF 10µF 1 1.2V to 20V SPX2945 3 SD GND 4 FB ______ ERROR ERROR 5 R2 VREF OUTPUT Adjustable Regulator 5V SPX2945 + 0.1 µF GND + 2.2 µF 5V Regulator Circuit DESCRIPTION The SPX2945 is a low power voltage regulator. This device is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX2945 features very low quiescent current (100µA Typ.) and very low dropout voltage. This includes a tight initial tolerance of 1% max and very low output temperature coefficient, making the SPX2945 useful as a lowpower voltage reference. The error flag output feature is used as power-on reset for warning of a low output voltage, due to a falling voltage input of batteries. Another feature is the logic-compatible shutdown input which enables the regulator to be switched on and off. The SPX2945 is offered in 3-pin TO-220 package, SO-8 (same pin out as SPX2951), SOT-223, surface mount 3-Pin TO-252, 3-Pin TO-263 pac...