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| SPX2937 500mA Low Dropout Voltage Regulators (PRELIMINARY INFORMATION) FEATURES * 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 APPLICATIONS * 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) TO-220-3 (U) SPX2937 1 2 3 1 SPX2937 2 3 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) .............................. 260C Storage Temperature Range ......................... -65C to +150C Operating Junction Temperature Range ........ -40C to +125C 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 F, unless otherwise specified. Limits in Boldface type apply over the entire operating temperature range. All other specifications are TA = 25C. PARAMETER Output Voltage Line Regulation Load Regulation Dropout Voltage Quiescent Current CONDITIONS 5mA IO 0.75A VO+2VVIN 20V IO=5mA 50mAIO 500mA IL = 50 mA IL = 500mA VO + 2V VIN20V IO = 5mA VIN=VO+5V IO=500mA 10Hz - 100kHz IO = 5mA FO = 120Hz, 1VRMS IO = 500mA SPX2937-2.5 Min Typ Max 2.42 2.5 2.56 2.38 2.62 7.5 25 2.5 110 0.5 2 10 75 25 250 1.0 10 20 SPX2937-3.3 Min Typ Max 3.20 3.3 3.40 3.14 3.46 9.9 33 3.3 110 0.5 2 10 99 33 250 1.0 10 20 SPX2937-5.0 Min Typ Max 4.85 5.0 5.15 4.75 5.25 15 50 5 110 0.5 2 10 150 50 250 1.0 10 20 SPX2937-8.0 Min Typ Max 7.76 8.0 8.24 7.60 8.40 24 80 8 110 0.5 2 10 240 80 250 1.0 10 20 UNITS V mV mV mV V mA mA VRMS dB mV/ 1000Hr A V V Output Noise Voltage Ripple Rejection Long Term Stability Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 60 54 10 0.6 1.0 75 -30 72 60 54 13.2 0.6 60 -15 1.0 75 -30 72 60 54 72 20 60 54 72 32 1.0 60 -15 0.60 75 -30 1.0 60 -15 0.60 75 -30 RO = 100 T 100ms RO = 100 RO = 100 T 100ms 60 -15 -50 -75 -50 -75 -50 -75 -50 -75 V Rev. 10/30/00 SPX2937 ELECTRICAL CHARACTERISTICS at VIN = VO + 5V, IO = 500mA, CO = 10 F, unless otherwise specified. Limits in Boldface type apply over the entire operating temperature range. All other specifications are TA = 25C. PARAMETER CONDITIONS SPX2937-10 Min Typ Max SPX2937-12 Min Typ Max SPX2937-15 Min Typ Max UNITS Output Voltage Line Regulation Load Regulation Dropout Voltage Quiescent Current 5mA IO 500mA VO+2VVIN 20V IO=5mA 5mAIO 500mA IL = 50 mA IL = 500mA VO + 2V VIN20V IO = 5mA VIN=VO+5V IO=500mA 10Hz- 100kHz IO = 5mA 9.70 9.50 10.0 30 10 0.5 2 10 300 10.3 10.5 100 100 250 1.0 10 20 11.64 11.40 12.0 36 12 110 0.5 2 10 360 44 12.36 12.60 120 120 250 1.0 10 20 14.55 14.25 15.0 45 15 110 0.5 2 10 450 56 15.45 15.75 150 150 250 1.0 10 20 V mV mV mV V mA mA VRMS mV/ 1000Hr Output Noise Voltage Long Term Stability Short Circuit Current Maximum Line Transient Reverse Polarity DC Input Voltage Reverse Polarity Transient Input Voltage 51 45 63 1.0 0.6 60 -15 -15 -50 1.0 75 -30 -30 -75 0.6 60 -15 -15 -50 1.0 75 -30 -30 -75 0.6 A V V V RO = 100 T 100ms RO = 100 RO = 100 T 100ms 60 -15 -15 -50 75 -30 -30 -75 APPLICATION HINTS EXTERNAL CAPACITORS The stability of the SPX2937 requires a 10F 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 -25C solid tantalum is recommended since the many aluminum types have electrolytes that freeze at about -30C. The ESR of about 5 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 22F and 0.15F for 1mA. Rev. 10/30/00 SPX2937 ORDERING INFORMATION Ordering No. 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 Output Voltages 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 Packages 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: sales@sipex.com 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 |
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