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SPX2954A Datasheet(PDF) 1 Page - Exar Corporation |
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SPX2954A Datasheet(HTML) 1 Page - Exar Corporation |
1 / 15 page 250mA Low Dropout Voltage Regulator SP X2954 1/15 REV1A 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 ■ ■ Error flag warns of output dropout ■ ■ Logic-controlled electronic shutdown ■ ■ Programmable output from 1.24V to 30V Description 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 a 3-pin SOT-223 package and an 8-pin SOIC package. Typical Application Typical Application 100K OUTPUT ERROR ERROR SD VOUT GND FB VIN 1.23V 1.2 to 30V R1 VIN .01 F 3.3 F VREF R2 3 8 5 1 4 7 SHUTDOWN INPUT + SPX2954 |
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Similar Description - SPX2954A |
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