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SPX2954AT3-3.3 Datasheet(PDF) 1 Page - Sipex Corporation |
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SPX2954AT3-3.3 Datasheet(HTML) 1 Page - Sipex Corporation |
1 / 7 page 1 Rev. 3/6/03 SP2954 250mA Low Dropout Voltage Regulator © Copyright 2003 Sipex Corporation 250mA Low Dropout Voltage Regulator SPX2954 DESCRIPTION FEATURES ■ 5.0V and 3.3V Versions at 250mA Output ■ Accurate 0.5% for SPX2954A ■ Very Low Quiescent Current ■ Low Dropout: 310mV at 250mA ■ Extremely Tight Load and Line Regulation ■ Very Low Temperature Coefficient ■ Current and Thermal Limiting ■ Need only 1µF for Stability ■ Direct Replacement for LP2954 ■ Offered in TO-92, TO-263, SOT-223, TO-220 and SOIC 8 Pin Versions Only ■ Error Flag Warns of Output Dropout ■ Logic-Controlled Electronic Shutdown ■ Programmable Output from 1.24V to 30V ® The SPX2954 and SPX2954A are low power voltage regulators. These devices are an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX2954 and SPX2954A feature low quiescent current and low dropout voltage (typ. 20mV at 100µA and 310mV at 250mA). This includes a tight initial tolerance (0.5% for SPX2954A), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20 ppm/°C typ.), making the SPX2954/SPX2954A useful as a low-power voltage reference. The error flag output feature is used as a power-on reset for warning of a low output voltage, due to a falling input voltage. The logic-compatible shutdown feature enables the regulator to be switched ON and OFF. The SPX2954/SPX2954A is offered in 3-pin TO-92, TO-263, SOT-223 and TO-220 packages, and 8 pin SOIC package. 100K OUTPUT ERROR ERROR ______ SD V OUT GND FB +VIN +VIN 1.23V 1.2 to 30V R1 .01µF 3.3µF R2 VREF 3 8 5 1 4 7 SHUTDOWN INPUT + SPX2954 Adjustable Regulator Pin Connections TO-263-5 Package (T5) Top View 45 SPX2954 TO-263-3 Package (T) GND GND SHUTDOWN ERROR 1) 3) 4) 5) 2) OUTPUT INPUT SPX2954 Top View 12 3 3 2 1 V OUT V IN Top View 2 1 3 4 8 7 6 5 SPX2954 SHUTDOWN GND INPUT 5V, 3.3V TAP ERROR FEEDBACK SENSE OUTPUT 8-Pin Surface Mount (S) Bottom View 13 2 OUTPUT GND INPUT TO-92 (N) SPX2954 13 2 V OUT GND SOT-223 Package (M3) Front View V IN TO-220-5 Package (U5) Front View SPX2954 GND SHUTDOWN ERROR 1) 3) 4) 5) 2) OUTPUT INPUT 12 3 4 5 Front View TO-220-3 Package (U) SPX2954 12 3 V IN V OUT GND |
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