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SPX2946T5-5.0 Datasheet(PDF) 1 Page - Sipex Corporation |
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SPX2946T5-5.0 Datasheet(HTML) 1 Page - Sipex Corporation |
1 / 11 page 1 Rev. B Date:01/20/04 SPX2945 400mA Low Dropout Voltage Regulator with Shutdown ©Copyright 2004 Sipex Corporation SPX2945 DESCRIPTION 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) ® 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 low- power 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 packages and 5-Pin TO-263. The regulator output voltage (of the 8-pin SO-8) may be pin-strapped for a 3.3V and 5.0V or programmed from 1.24V to 20V with an external pair of resistors. Look for SPX2951 for 150mA and SPX2954 for 250mA applications. 400mA Low Dropout Voltage Regulator with Shutdown TO-220-3 (U) 123 V IN V OU GN SPX2945 13 25 4 SPX2945 5 Pin TO-263 13 2 SOT-223 (M3) V IN GN V OU SPX2945 2 1 3 4 8 7 6 5 8-Pin Surface Mount V OU SENS SHUTDOWN GN V IN FEEDBACK 5V/ 3.3V TAP ERRO SPX2945 TO-252 (R) 1 23 V IN V OU GN SPX2945 TO-263-5 V IN TO-263-3 (T) V OU GN SPX2945 3 2 1 (S) (T5) 100K ERROR ______ SD V OUT GND FB +V IN 0.01µF 3 8 1 4 7 SHUTDOWN INPUT SPX2945 OFF ON +V IN 5 10µF V REF R 2 R 1 + ERROR OUTPUT 1.2V to 20V + 2.2 µF + SPX2945 V IN 5V IN GND OUT 0.1 µF Adjustable Regulator 5V Regulator Circuit |
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