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SPX2957AS Datasheet(PDF) 1 Page - Sipex Corporation |
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SPX2957AS Datasheet(HTML) 1 Page - Sipex Corporation |
1 / 9 page Rev. 11/21/00 ALPHA AS2930 1 8-Pin Surface Mount Top View 2 3 4 5 6 7 8 SPX2955 OUTPUT SENSE SHUTDOWN GROUND INPUT FEEDBACK 5V/ 3.3V TAP ERROR SPX2955/56/57 350mA Low Drop Out Voltage Regulator with Shutdown (PRELIMINARY INFORMATION) FEATURES APPLICATIONS • Output Accuracy 5V, 3.3V@ 350mA Output • Battery Powered Systems • Very Low Quiescent Current • Cordless Telephones • Low Dropout Voltage • Radio Control Systems • Extremely Tight Load And Line Regulation • Portable/Palm Top/Notebook Computers • Very Low Temperature Coefficient • Portable Consumer Equipment • Current & Thermal Limiting • Portable Instrumentation • Error Flag Warns Of Output Dropout • Automotive Electronics • Logic-Controlled Electronic Shutdown • SMPS Post-Regulator • Output Programmable From 1.24V to 29V • Voltage Reference PRODUCT DESCRIPTION The SPX2955/56/57 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 SPX2955/56/57 features very low quiescent current (100 µA Typ.) and very low dropout voltage. This includes a tight initial tolerance of 1% max and 2% max., and very low output temperature coefficient, making the SPX2955/56/57 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 SPX2955/56/57 is offered in 3-pin and 5-pin TO-220 package compatible with other 5 volt and adjustable regulators, in 8-Pin Plastic Dip SO-8 (same pin out as SPX2951) and surface mount TO-263 packages. The regulator output voltage (of the 8-pin package and 5-pin TO-220 & TO-263) may be pin-strapped for a 5V and 3.3V or programmed from 1.24V to 29V with an external pair of resistors. Look for SPX2951 for 150mA and SPX2954 for 250mA applications. PIN CONNECTIONS TO-263-5 Package Top View 12 3 4 5 SPX2956/57 INPUT GND INPUT ERROR OUTPUT GND Five Lead Package Pin Functions: 1) SPX2956 SPX2957 3) 4) 5) ADJUST SHUTDOWN OUTPUT SHUTDOWN 2) Front View 3 2 1 TO-263-3 Package V OUT GND V IN SPX2955 Top View SPX2956/57 TO-220-5 Package 5 4 3 2 1 Front View TO-220-3 Package 1 2 3 VOUT GND V IN |
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