SPX1121

® SPX1121 150mA Low Dropout Voltage Regulator FEATURES ■ 5.0V and 3.3V output versions ■ 1% Output Accuracy ■ Very Low Quiescent Current ■ Low Dropout: 300mV @ 150mA ■ Very Tight Load & Line Regulation ■ Very Low Temperature Coefficient ■ Current and Thermal Limiting ■ Requires only 1µF for Stability ■ Equivalent Replacement for LT1121 ■ Industry Standard SOT-223 and TO-92 3 lead packages VOUT IIN IN OUT 5V IL SPX1121 + 0.1µF GND + 2.2µF LOAD IIN = IL + IG IG Figure 1. Fixed +5V Regulator Circuit DESCRIPTION The SPX1121 is a low power voltage regulator. It is an excellent choice for use in battery-powered applications such as cordless telephones, radio control systems, and portable computers. The SPX1121 features very low quiescent current and low dropout voltage (typ. 20mV at 100µA and 300mV at 150mA). A tight initial tolerance (1%), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20 ppm/°C typ.), make the SPX1121 useful as a low power voltage reference. PACKAGES SOT-223 Package (M3) TO-92 (N) 1 2 3 SPX1121 1 2 3 OUTPUT INPUT GND VIN GND V OUT Front View Bottom View Rev. 10/11/02 SPX1121 150mA Low DropoutVoltage Regulator © Copyright 2002 Sipex Corporation 1 ABSOLUTE MAXIMUM RATINGS Power Dissipation........................................Internally Limited Lead Temperature (soldering, 5 seconds) ................260°C Storage Temperature Range........................-65°C to +150°C Operating Juncti...