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| UNISONIC TECHNOLOGIES CO., LTD LM2937 500mA LOW DROPOUT VOLTAGE REGULATOR 1 DESCRIPTION The UTC LM2937 is a positive voltage regulator capable of supplying up to 500mA of load current. The use of a PNP power transistor provides a low dropout voltage characteristic. With a load current of 500mA the minimum input to output voltage differential required for the output to remain in regulation is typically 0.5V(1V guaranteed maximum over the full operating temperature range). Special circuitry has been incorporated to minimize the quiescent current to typically only 10mA with a full 500mA load current when the input to output voltage differential is greater than 3V. The UTC LM2937 requires an output bypass capacitor for stability. As with most low dropout regulators, the ESR of this capacitor remains a critical design parameter, but the LM2937 includes special compensation circuitry that relaxes ESR requirements. The UTC LM2937 is stable for all ESR below 3.This allows the use of low ESR chip capacitors. Ideally suited for automotive applications, the UTC LM2937 will protect itself and any load circuitry from reverse battery connections, two-battery jumps and up to +60V/-50V load dump transients. Familiar regulator features such as short circuit and thermal shutdown protection are also built in. LINEAR INTEGRATED CIRCUIT TO-220 1 TO-263 1 TO-263-3 1 TO-263-5 *Pb-free plating product number:LM2937L-XX FEATURES * Fully specified for operation over -40C~ +125C * Output current in excess of 500mA * Output trimmed for 5% tolerance under all operating conditions * Typical dropout voltage of 0.5V at full rated load current * Wide output capacitor ESR range, up to 3 * Reverse battery protection * Internal short circuit and thermal overload protection * 60V input transient protection * Mirror image insertion protection * Built-in ON/OFF control function ORDERING INFORMATION Order Number Normal Lead Free Plating LM2937-XX-TA3-T LM2937L-xx-TA3-T LM2937-xx-TQ2-R LM2937L-xx-TQ2-R LM2937-xx-TQ2-T LM2937L-xx-TQ2-T LM2937-xx-TQ3-R LM2937L-xx-TQ3-R LM2937-xx-TQ3-T LM2937L-xx-TQ3-T LM2937-xx-TQ5-R LM2937L-xx-TQ5-R LM2937-xx-TQ5-T LM2937L-xx-TQ5-T Package TO-220 TO-263 TO-263 TO-263-3 TO-263-3 TO-263-5 TO-263-5 Packing Tube Tape Reel Tube Tape Reel Tube Tape Reel Tube www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd 1 of 10 QW-R102-012.F LM2937 ORDERING INFORMATION (Cont.) LM2937L-xx-TA3-R LINEAR INTEGRATED CIRCUIT (1)Packing Type (2)Package Type (3)Output Voltage Code (4)Lead Plating (1) R: Tape Reel, T: Tube (2) TA3: TO-220, TQ2: TO-263, TQ3: TO-263-3, TQ 5: TO-263-5 (3) xx: refer to Marking Information (4) L: Lead Free Plating, Blank: Pb/Sn PIN CONFIGURATION PIN NO. TO-263/TO-263-3/TO-220 1 2 3 TO-263-5 4 3 5 1 2 PIN NAME Input GND Output N/C ON/OFF MARKING INFORMATION PACKAGE VOLTAGE CODE MARKING TO-220 TO-263 TO-263-3 UTC LM2937 33 50 80 10 12 15 :3.3V :5.0V :8.0V :10V :12V :15V VOLTAGECODE LEAD PLATING DATE CODE 1 2 3 TO-263-5 UTC LM2937 VOLTAGE CODE LEAD PLATING DATE CODE 12345 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R102-012.F LM2937 ABSOLUTE MAXIMUM RATINGS (Note 1) LINEAR INTEGRATED CIRCUIT PARAMETER SYMBOL RATINGS UNIT Input Voltage VIN 26 V Power Dissipation(Note 2) PD Internally limited Maximum Junction Temperature TJ +150 C Storage Temperature TSTG -40 ~ +150 C Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Electrical Specifications do not apply when operating the device outside of its rated Operating Conditions. 2 The maximum allowable power dissipation at any ambient temperature is PMAX = (125-TA)/ JA, where 125 is the maximum junction temperature for operation, TA is the ambient temperature, and JA is the junction to ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125C and the electrical specifications do not apply. If the die temperature rises above 150C, the LM2937 will go into thermal shutdown. THERMAL DATA PARAMETER Thermal Resistance Junction- Ambient TO-220 TO-263 TO-263-5 TO-220 Thermal Resistance Junction- Case TO-263 TO-263-5 JC SYMBOL JA RATINGS 65 73 73 3 4 4 UNIT C/W ELECTRICAL CHARACTERISTICS (VIN=VNOM+5V, IOUT=500mA, COUT=10F, TJ=Ta=25C, unless otherwise specified.) For LM2937-3.3V PARAMETER Output Voltage Line Regulation Load Regulation Quiescent Current Output Noise Voltage Long Term Stability Dropout Voltage Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage SYMBOL VOUT VOUT VOUT IQ eN VD ISC TIN VRIN VTRRI SYMBOL VOUT VOUT VOUT IQ eN VD TEST CONDITIONS 5mAIOUT500mA VOUT+2VVIN26V, IOUT=5mA 5mAIOUT500mA (VO+2V)VIN 26V, IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA tF100ms, RL=100 VOUT -0.6V, RL=100 tF<1ms, RL=100 TEST CONDITIONS 5mAIOUT500mA VOUT+2VVIN26V, IOUT=5mA 5mAIOUT500mA (VOUT+2V)VIN 26V, IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA MIN 3.21 TYP 3.30 9 3 2 10 100 12 0.5 110 1.0 75 -30 -75 TYP 5.00 15 5 2 10 150 20 0.5 110 MAX 3.39 30 30 10 20 UNIT V mV mV mA mA Vrms mV V mV A V V V UNIT V mV mV mA mA Vrms mV V mV 1.0 250 0.6 60 -15 -50 MIN 4.85 For LM2937-5.0V PARAMETER Output Voltage Line Regulation Load Regulation Quiescent Current Output Noise Voltage Long Term Stability Dropout Voltage MAX 5.15 50 50 10 20 1.0 250 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 10 QW-R102-012.F LM2937 ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage SYMBOL ISC TIN VRIN VTRRI SYMBOL VOUT VOUT VOUT IQ eN VD ISC TIN VRIN VTRRI SYMBOL VOUT VOUT VOUT IQ eN VD ISC TIN VRIN VTRRI SYMBOL VOUT VOUT VOUT IQ eN VD ISC TIN VRIN VTRRI LINEAR INTEGRATED CIRCUIT TEST CONDITIONS tF100ms, RL=100 VOUT -0.6V, RL=100 tF<1ms, RL=100 TEST CONDITIONS 5mAIOUT500mA VOUT+2VVIN26V, IOUT=5mA 5mAIOUT500mA (VOUT+2V)VIN 26V,IOUT=5mA VIN= Vo+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA tF100ms, RL=100 VOUT -0.6V, RL=100 tF<1ms, RL=100 TEST CONDITIONS 5mAIOUT500mA VOUT+2VVIN26V, IOUT=5mA 5mAIOUT500mA (VOUT+2V)VIN 26V,IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA tF100ms ,RL=100 VOUT-0.6V ,RL=100 tF<1ms ,RL=100 MIN 0.6 60 -15 -50 MIN 7.76 TYP 1.0 75 -30 -75 TYP 8.00 24 8 2 10 240 32 0.5 110 1.0 75 -30 -75 TYP 10.00 30 10 2 10 300 40 0.5 110 1.0 75 -30 -75 TYP 12.00 36 12 2 10 360 44 0.5 110 1.0 75 -30 -75 MAX UNIT A V V V UNIT V mV mV mA mA Vrms mV V mV A V V V UNIT V mV mV mA mA Vrms mV V mV A V V V UNIT V mV mV mA mA Vrms mV V mV A V V V For LM2937-8.0V PARAMETER Output Voltage Line Regulation Load Regulation Quiescent Current Output Noise Voltage Long Term Stability Dropout Voltage Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage MAX 8.24 80 80 10 20 1.0 250 0.6 60 -15 -50 MIN 9.70 For LM2937-10.0V PARAMETER Output Voltage Line Regulation Load Regulation Quiescent Current Output Noise Voltage Long Term Stability Dropout Voltage Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage MAX 10.30 100 100 10 20 1.0 250 0.6 60 -15 -50 For LM2937-12.0V PARAMETER Output Voltage Line Regulation Load Regulation Quiescent Current Output Noise Voltage Long Term Stability Dropout Voltage Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage TEST CONDITIONS MIN 5mAIOUT500mA 11.64 VOUT+2VVIN26V, IOUT=5mA 5mAIOUT500mA (VOUT+2V)VIN 26V,IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA 0.6 tF100ms, RL=100 60 VOUT-0.6V, RL=100 -15 tF<1ms, RL=100 -50 MAX 12.36 120 120 10 20 1.0 250 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 10 QW-R102-012.F LM2937 ELECTRICAL CHARACTERISTICS (Cont.) For LM2937-15.0V PARAMETER Output Voltage Line Regulation Load Regulation Quiescent Current Output Noise Voltage Long Term Stability Dropout Voltage Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage SYMBOL VOUT VOUT VOUT IQ eN VD ISC TIN VRIN VTRRI LINEAR INTEGRATED CIRCUIT TEST CONDITIONS MIN 5mAIOUT500mA 14.55 VOUT+2VVIN26V, IOUT=5mA 5mAIOUT500mA (VOUT+2V)VIN 26V,IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA 0.6 tF100ms, RL=100 60 VOUT-0.6V, RL=100 -15 tF<1ms, RL=100 -50 TYP 15.00 45 15 2 10 450 56 0.5 110 1.0 75 -30 -75 MAX 15.45 150 150 10 20 1.0 250 UNIT V mV mV mA mA Vrms mV V mV A V V V ON/OFF CONTROL (For 5 pins only) PARAMETER ON/OFF Threshold Voltage ON ON/OFF Threshold Voltage OFF ON/OFF Threshold Current SYMBOL VON VOFF ION/OFF TEST CONDITIONS IOUT 0.5A IOUT 0.5A VON/OFF=2.0V, IOUT=0.5A MIN 2.0 50 100 TYP MAX 0.8 UNIT V V A UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 10 QW-R102-012.F LM2937 TYPICAL APPLICATION VIN 1 3 LINEAR INTEGRATED CIRCUIT UNREGULATED INPUT CIN* 10 F UTC LM2937-XX 2 VOUT REGULATED OUTPUT COUT** 10 F IQ ON/OFF CONTROL APPLICATION VIN VOUT UNREGULATED INPUT CIN* 10 F 4 UTC LM2937-XX N/C 1 3 5 REGULATED OUTPUT COUT** 10 F IQ 2 ON/OFF * Required if the regulator is located more than 3 inches from the power supply filter capacitors. **Required for stability. COUT must be at least 10F (over the full expected operating temperature range) and located as close as possible to the regulator. The equivalent series resistance, ESR, of this capacitor may be as high as 3. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 10 QW-R102-012.F LM2937 TYPICAL CHARACTERISTICS LINEAR INTEGRATED CIRCUIT 0.9 0.8 Dropout Voltage ( V) Dropout Voltage vs Output Current TJ=25 1.0 0.9 0.8 Dropout Voltage (V) Dropout Voltage vs Temperature 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 -40 0.05A 0.5A 0.25A 100 200 300 400 Output Current(mA) Output Voltage vs Temperature RL=100 500 0 40 80 Temperature 120 5.10 5.08 5.06 Output Voltage (V) 20 Quiescent Current vs Temperature Quiescent Current (mA) 5.04 5.02 5.00 4.98 4.96 4.94 4.92 4.90 -40 15 10 500mA 250mA 5 5mA 0 -40 0 80 40 Temperature 120 0 40 80 Temperature 120 100 Quiescent Current vs Input Voltage Quiescent Current vs Input Voltage 10 VIN=14V 9 VOUT=5V TJ=25 8 7 6 5 4 3 2 1 0 0 Quiescent Current (mA) 70 60 50 40 30 20 10 0 0 0.25A 0.05A 5 10 15 20 25 Input Voltage (V) 30 35 0.5A Quiescent Current (mA) VOUT=5V 90 Ta=25 80 100 300 400 200 Output Current (mA) 500 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 10 QW-R102-012.F LM2937 TYPICAL CHARACTERISTICS(Cont.) LINEAR INTEGRATED CIRCUIT 40 Line Transient Response Load Transient Response Output Voltage Deviation (mV) 20 0 Output Voltage Deviation (mV) Load Current (A) IOUT=50mA VOUT=5 V Ta=25 50 0 -50 -20 Input Voltage Change (V) 3V 400 0V -10 0 10 20 30 Time ( s) 40 50 60 0 -1 0 1 2 3 Time ( s) 4 5 6 Ripple Rejection VIN=10V VOUT=5 V 70 COUT=10 F IOUT=50mA 5.0 4.0 Low Voltage Behavior IOUT=500mA VOUT=5 V TJ=25 Ripple Rejection (dB) Output Voltage (V) 60 50 40 3.0 2.0 1.0 0 10 100 1K 10K 100K Frequency (Hz) 1M 0 1.0 2.0 4.0 3.0 Input Voltage (V) 5.0 6.0 14 12 Low Voltage Behavior IOUT=500mA TJ=25 VOUT=10V 18 15 Low Voltage Behavior IOUT=500mA TJ=25 VOUT=15 V Output Voltage (V) Output Voltage (V) 10 8 6 4 2 0 0 2 4 6 10 8 Input Voltage (V) 12 14 VOUT=8 V 12 9 6 3 0 0 3 12 6 9 Input Voltage (V) 15 18 VOUT=12 V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 10 QW-R102-012.F LM2937 TYPICAL CHARACTERISTICS(Cont.) Output at Voltage Extremes RL=100 VOUT=10V LINEAR INTEGRATED CIRCUIT 12 10 20 16 Output at Voltage Extremes RL=100 VOUT=15V VOUT=12V Output Voltage (V) 8 6 4 2 0 -2 -30 -20 -10 Output Voltage (V) VOUT=8V 12 8 4 0 VOUT=5V 0 20 10 Input Voltage (V) 30 40 -4 -30 -20 -10 0 20 10 Input Voltage (V) 30 40 Output Impedance VIN=14V VOUT=5 V COUT=10 F IOUT=25mA 100 Output Capacitor ESR VOUT=5V COUT=10 F Output Impedance ( ) 10 Equivalent Series Resistance ( ) 10 1.0 0.1 1 STABLE REGION 0.01 0.1 10 100 1K 10K 100K Frequency (Hz) 1M 0.01 0 100 200 300 400 Output Current (mA) 500 1.5 Peak Output Current VIN=14V Output Current (A) 1.0 0.5 0 -40 0 40 80 Temperature ( ) 120 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 9 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 10 QW-R102-012.F |
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