SPX2937 500mA Low Dropout Voltage Regulators (PRELIMINARY INFORMATION) FEATURES APPLICATIONS • Output Current 500mA at 15V, 12V, 10V, 8V, 5V, 3.3V and 2.5V • Internal Short Circuit Current Limit • Dropout Voltage 0.5V at 500mA Output • Extremely Tight Load and Line Regulation • Very Low Temperature Coefficient • Mirror Image Insertion Protection • Direct Replacement For LM2937 Socket • Battery Powered Systems • Cordless Telephones • Automotive Electronics • Portable/ Palm Top / Notebook Computers • Portable Consumer Equipment • Portable Instrumentation • SMPS Post-Regulator • Voltage Reference PRODUCT DESCRIPTION The SPX2937 is a low power positive voltage regulator. The SPX2937 offers 500mA output current with a dropout voltage of only 0.5V and over temperature dropout is up to 1V. The quiescent current is 10mA at differential output of 5V and output current of 500mA. A higher quiescent current can exist when the device is in dropout mode (VIN - VOUT≤ 3V ) The regulator will automatically shut down to protect both the internal circuits and the load. This device also features short circuit and thermal overload protection. The SPX2937 is offered in a 3-pin TO-220 package compatible with other 5 volt and 3.3 volt regulators, TO-263 and SOT-223. This device offers a variety of output voltages 15V, 12V, 10V, 8V, 5V, 3.3V and 2.5V. SPX2937 is a direct replacement to LM2937. PIN CONNECTIONS SOT-223 (M3) TO-263-3 (T) SPX2937 SPX2937 1 2 3 1 2 3 TO-220-3 (U) SPX2937 1 2 3 VIN GND VOUT Top View VOUT GND VIN Top View VOUT GND VIN Front View Rev. 10/30/00 SPX2937 ABSOLUTE MAXIMUM RATINGS Power Dissipation..........................................Internally Limited Lead Temp. (Soldering, 10 Seconds) .............................. 260°C Storage Temperature Range ......................... -65°C to +150°C Operating Junction Temperature Range ........ -40°C to +125°C Input Supply Voltage ................................................... +20V Feedback Input Voltage ..................................-1.5V to +20V Shutdown Input Voltage..................................-0.3V to +20V Error Comparator Output ................................-0.3V to +20V ESD Rating ............................................................2KV Min ELECTRICAL CHARACTERISTICS at VIN = VO + 5V, IO = 500mA, CO = 10 µF, unless otherwise specified. Limits in Boldface type apply over the entire operating temperature range. All other specifications are TA = 25°C. PARAMETER CONDITIONS Output Voltage 5mA ≤IO ≤0.75A Line Regulation VO+2V≤VIN≤ 20V IO=5mA 50mA≤IO≤ 500mA Load Regulation Dropout Voltage Quiescent Current Output Noise Voltage Ripple Rejection Long Term Stability Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage SPX2937-2.5 Min Typ Max 2.42 2.5 2.56 2.38 2.62 7.5 25 SPX2937-3.3 Min Typ Max 3.20 3.3 3.40 3.14 3.46 9.9 33 SPX2937-5.0 Min Typ Max 4.85 5.0 5.15 4.75 5.25 15 50 SPX2937-8.0 Min Typ Max 7.76 8.0 8.24 7.60 8.40 24 80 2.5 25 3.3 33 5 50 8 80 mV IL = 50 mA IL = 500mA VO + 2V ≤VIN≤20V IO = 5mA VIN=VO+5V IO=500mA 10Hz - 100kHz IO = 5mA 110 0.5 2 250 1.0 10 110 0.5 2 250 1.0 10 110 0.5 2 250 1.0 10 110 0.5 2 250 1.0 10 mV V mA 10 20 10 20 10 20 10 20 mA FO = 120Hz, 1VRMS IO = 500mA 60 54 10 RO = 100Ω T ≤ 100ms RO = 100Ω RO = 100Ω T ≤ 100ms 75 99 72 60 54 13.2 150 72 60 54 72 60 54 20 UNITS V mV 240 µVRMS 72 dB 32 mV/ 1000Hr 0.6 1.0 0.6 1.0 1.0 0.60 1.0 0.60 A 60 75 60 75 60 75 60 75 V -15 -30 -15 -30 -15 -30 -15 -30 V -50 -75 -50 -75 -50 -75 -50 -75 V Rev. 10/30/00 SPX2937 ELECTRICAL CHARACTERISTICS at VIN = VO + 5V, IO = 500mA, CO = 10 µF, unless otherwise specified. Limits in Boldface type apply over the entire operating temperature range. All other specifications are TA = 25°C. PARAMETER CONDITIONS Output Voltage 5mA ≤IO ≤500mA Line Regulation VO+2V≤VIN≤ 20V IO=5mA 5mA≤IO≤ 500mA 30 10.3 10.5 100 10 IL = 50 mA IL = 500mA VO + 2V ≤VIN≤20V IO = 5mA VIN=VO+5V IO=500mA 10Hz- 100kHz IO = 5mA Load Regulation Dropout Voltage Quiescent Current Output Noise Voltage Long Term Stability Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage SPX2937-10 Min Typ Max 9.70 9.50 51 45 10.0 RO = 100Ω T ≤ 100ms 11.64 11.40 14.55 14.25 100 12 120 15 150 mV 0.5 250 1.0 110 0.5 250 1.0 110 0.5 250 1.0 mV V 2 10 2 10 2 10 mA 10 300 20 10 360 20 10 450 20 mA µVRMS 44 1.0 0.6 15.0 UNITS 36 63 12.0 SPX2937-15 Min Typ Max 12.36 12.60 120 1.0 RO = 100Ω T ≤ 100ms RO = 100Ω SPX2937-12 Min Typ Max 45 15.45 15.75 150 mV 56 1.0 0.6 V mV/ 1000Hr 0.6 A 60 75 60 75 60 75 V -15 -15 -50 -30 -30 -75 -15 -15 -50 -30 -30 -75 -15 -15 -50 -30 -30 -75 V V APPLICATION HINTS EXTERNAL CAPACITORS The stability of the SPX2937 requires a 10µF or greater capacitor between output and ground. Oscillation could occur without this capacitor. Most types of tantalum or aluminum electrolytic works fine here. For operations below -25°C solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30°C. The ESR of about 5Ω or less and resonant frequency above 500 kHz are the most important parameters in the value of the capacitor. The capacitor value may be increased without limit. At lower values of output current, less output capacitance is required for stability. For the currents below 10mA the value of the capacitor can be reduced to 22µF and 0.15µF for 1mA. Rev. 10/30/00 SPX2937 ORDERING INFORMATION Ordering No. Output Voltages Packages SPX2937U3-2.5 SPX2937U3-3.3 SPX2937U3-5.0 SPX2937U3-8.0 SPX2937U3-10 SPX2937U3-12 SPX2937U3-15 SPX2937T3-2.5 SPX2937T3-3.3 SPX2937T3-5.0 SPX2937T3-8.0 SPX2937T3-10 SPX2937T3-12 SPX2937T3-15 SPX2937M3-2.5 SPX2937M3-3.3 SPX2937M3-5.0 SPX2937M3-8.0 SPX2937M3-10 SPX2937M3-12 SPX2937M3-15 2.5V 3.3V 5.0V 8.0V 10.0V 12.0V 15.0V 2.5V 3.3V 5.0V 8.0V 10.0V 12.0V 15.0V 2.5V 3.3V 5.0V 8.0V 10.0V 12.0V 15.0V 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-220 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead TO-263 3 Lead SOT-223 3 Lead SOT-223 3 Lead SOT-223 3 Lead SOT-223 3 Lead SOT-223 3 Lead SOT-223 3 Lead SOT-223 Corporation SIGNAL PROCESSING EXCELLENCE Sipex Corporation Headquarters and Main Offices: 22 Linnell Circle Billerica, MA 01821 TEL: (978) 667-8700 FAX: (978) 670-9001 e-mail: [email protected] 233 South Hillview Drive Milpitas, CA 95035 TEL: (408) 935-7600 FAX: (408) 934-7500 Sipex Corporation reserves the right to make changes to any products described herein. Sipex does not assume any liability arising out of the application or use of any product or circuit described hereing; neither does it convey any license under its patent rights nor the rights of others. Rev. 10/30/00