SPX2950/SPX2951 150mA Low Dropout Voltage Regulator 8-Pin Surface Mount (S) TO-92 (N) FEATURES 132 1 OUTPUT 8 INPUT 2 5.0V and 3.3V at 150mA Output SENSE 7 FEEDBACK SHUTDOWN 3 6 5V or 3.3V Output Accurate: 0.5% for SPX2950A/SPX2951A 4 5 V V GROUND ERROR OUT IN GROUND Very Low Quiescent Current Low Dropout Voltage: 300mV at 150mA SPX2951 Top View SPX2950 Bottom View Extremely Tight Load and Line Regulation Now Available in Lead Free Packaging Very Low Temperature Coefficient Current & Thermal Limiting APPLICATIONS Need Only 1F for Stability Battery Powered Systems Offered in TO-92 (SPX2950) and SOIC Cordless Telephones (SPX2951) Radio Control Systems Direct Replacement for LP2950/LP2951 Portable/Palm Top/Notebook Computers Portable Consumer Equipment SPX2951 versions only Portable Instrumentation Error Flag Warns of Output Dropout Avionics Logic-Controlled Electronic Shutdown SMPS Post-Regulator Output Programmable From 1.24 to 29V Voltage Reference Automotive Electronics DESCRIPTION The SPX2950 and SPX2951 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 SPX2950 and SPX2951 feature low quiescent current and low dropout voltage (typ. 20mV at 100A and 300mV at 150mA). This includes a tight initial tolerance of (0.5% for SPX2950A/SPX2951A), extremely good load and line regulation (0.05% typ.), and very low output temperature coefficient (20ppm/ C typ.), making the SPX2950/SPX2951 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 voltage. The logic compatible shutdown feature enables the regulator to be switched ON and OFF. The SPX2950 is offered in a 3-pin TO-92 package compatible with other 5.0V, 3.3V regulators. The SPX2951 is availiable in an 8-lead SOIC package. UNREGULATED DC 5V 7 8 1 + FEEDBACK INPUT OUTPUT 2 SENSE 180k + 6 ERROR FROM 3 AMPLIFIER CMOS OR 330k 5V TAP TTL SHUTDOWN + 60 mV 60k 1F 5 . + + ERROR . ERROR DETECTION TO CMOS OR + 1.23V COMPARATOR TTL 4 REFERENCE GROUND Block Diagram of SPX2951, 8 Lead 5V Version DATE: 12/01/04 SPX2950/SPX2951 150mA Low Dropout Voltage Regulator Copyright 2004 Sipex Corporation 1ABSOLUTE MAXIMUM RATINGS Feedback Input Voltage ................................................ -1.5V to +30V Power Dissipation ........................................................ Internally Limited Lead Temp. (Soldering, 5 Seconds) ............................................. 260C Shutdown Input Voltage ................................................ -0.3V to +30V Error Comparator Output .............................................. -0.3V to +30V Storage Temperature Range ........................................ -65C to +150C ESD Rating ............................................................................ 2kV Min Operating Junction Temperature Range ....................... -40C to +125C Input Supply Voltage ........................................................ -0.3V to +30V ELECTRICAL CHARACTERISTICS Electrical characteristics at V = V +1V, I =100A, C =1F (note 2) T =25C, unless otherwise specified. Boldface applies over the full IN O L L A operating temperature range. PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS SPX2950AC SPX2950C SPX2951AC SPX2951C 3.3V Version Output Voltage T =25C 3.284 3.3 3.317 3.267 3.3 3.333 V J -25CT 85C 3.267 3.3 3.333 3.251 3.3 3.350 J Full Operating Temperature 3.260 3.3 3.340 3.324 3.3 3.366 Output Voltage 100A I 150mA 3.254 3.3 3.346 3.221 3.3 3.379 V L T T J JMAX 5.0V Version Output Voltage T =25C 4.975 5.0 5.025 4.950 5.0 5.050 V J -25CT 85C 4.950 5.0 5.050 4.925 5.0 5.075 J Full Operating Temperature 4.940 5.0 5.060 4.900 5.0 5.100 Output Voltage 100AI 150mA 4.925 5.0 5.075 4.880 5.0 5.120 V L T T J JMAX All Voltage Options Output Voltage (Note1) 20 100 50 150 ppm/C Temperature Coefficient Line Regulation (Note 3) V +1V V 30V (Note 4) 0.03 0.1 0.04 0.2 % O IN Load Regulation (Note 3) 100AI 150mA 0.04 0.1 0.1 0.2 % L Dropout Voltage (Note5) I =100A2080 2080mV L I =100mA 270 450 270 450 mV L I =150mA 300 500 300 500 mV L Ground Current I =100A 150 170 150 170 A L I =100mA 3 6 3 6 mA L I =150mA 5 8 5 8 mA L Current Limit V =0 230 230 mA OUT Thermal Regulation 0.05 0.2 0.05 0.2 %/W Output Noise, C =1F 430 430 Vrms L 10Hz to 100kHz C =200F 160 160 Vrms L C =3.3F, Bypass=0.01F 100 100 Vrms L from pin 7 to pin1 (SPX2951) 8-Pin Version only SPX2951AC SPX2951C Reference Voltage 1.220 1.235 1.250 1.210 1.235 1.260 V Reference Voltage Over Temperature (Note 6) 1.190 1.270 1.185 1.285 V Feedback Pin Bias Current 40 60 40 60 nA Reference Voltage 20 50 ppm/C Temperature Coefficient Feedback Pin Bias Current 0.1 0.1 nA/C Temperature Coefficient DATE: 12/01/04 SPX2950/SPX2951 150mA Low Dropout Voltage Regulator Copyright 2004 Sipex Corporation 2