UNISONIC TECHNOLOGIES CO., LTD LM2937 LINEAR INTEGRATED CIRCUIT 500mA LOW DROPOUT VOLTAGE REGULATOR 1 TO-220 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 3Ω.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. 1 TO-263 1 TO-263-3 1 TO-263-5 *Pb-free plating product number:LM2937L-XX FEATURES * Fully specified for operation over -40°C~ +125°C * 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 3Ω * 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 www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd Package Packing TO-220 TO-263 TO-263 TO-263-3 TO-263-3 TO-263-5 TO-263-5 Tube Tape Reel Tube Tape Reel Tube Tape Reel Tube 1 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT ORDERING INFORMATION (Cont.) LM2937L-xx-TA3-R (1) R: Tape Reel, T: Tube (1)Packing Type (3)Output Voltage Code (2) TA3: TO-220, TQ2: TO-263, TQ3: TO-263-3, TQ 5: TO-263-5 (3) xx: refer to Marking Information (4)Lead Plating (4) L: Lead Free Plating, Blank: Pb/Sn (2)Package Type 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 TO-220 TO-263 TO-263-3 TO-263-5 VOLTAGE CODE MARKING UTC LM2937 33 50 80 10 12 15 :3.3V :5.0V :8.0V :10V :12V :15V LEAD PLATING VOLTAGECODE DATE CODE 1 2 3 UTC LM2937 VOLTAGE CODE LEAD PLATING DATE CODE 1 2 3 4 5 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Note 1) 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)/ θJA, where 125 is the maximum junction temperature for operation, TA is the ambient temperature, and θJA is the junction to ambient thermal resistance. If this dissipation is exceeded, the die temperature will rise above 125°C and the electrical specifications do not apply. If the die temperature rises above 150°C, the LM2937 will go into thermal shutdown. THERMAL DATA PARAMETER SYMBOL Thermal Resistance Junction- Ambient Thermal Resistance Junction- Case TO-220 TO-263 θJA RATINGS 65 73 TO-263-5 73 TO-220 3 TO-263 θJC UNIT °C/W 4 TO-263-5 4 ELECTRICAL CHARACTERISTICS (VIN=VNOM+5V, IOUT=500mA, COUT=10µF, TJ=Ta=25°C, unless otherwise specified.) For LM2937-3.3V PARAMETER Output Voltage Line Regulation Load Regulation SYMBOL VOUT △VOUT △VOUT Quiescent Current IQ Output Noise Voltage Long Term Stability eN Dropout Voltage VD Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage ISC TIN VRIN VTRRI TEST CONDITIONS 5mA≤IOUT≤500mA VOUT+2V≤VIN≤26V, IOUT=5mA 5mA≤IOUT≤500mA (VO+2V)≤VIN ≤26V, IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA tF≤100ms, RL=100Ω VOUT ≥-0.6V, RL=100Ω tF<1ms, RL=100Ω MIN 3.21 0.6 60 -15 -50 TYP 3.30 9 3 2 10 100 12 0.5 110 1.0 75 -30 -75 MAX 3.39 30 30 10 20 TYP 5.00 15 5 2 10 150 20 0.5 110 MAX 5.15 50 50 10 20 1.0 250 UNIT V mV mV mA mA µVrms mV V mV A V V V For LM2937-5.0V PARAMETER Output Voltage Line Regulation Load Regulation SYMBOL VOUT △VOUT △VOUT Quiescent Current IQ Output Noise Voltage Long Term Stability eN Dropout Voltage VD TEST CONDITIONS 5mA≤IOUT≤500mA VOUT+2V≤VIN≤26V, IOUT=5mA 5mA≤IOUT≤500mA (VOUT+2V)≤VIN ≤26V, IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 4.85 1.0 250 UNIT V mV mV mA mA µVrms mV V mV 3 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Cont.) PARAMETER Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage SYMBOL ISC TIN VRIN VTRRI TEST CONDITIONS tF≤100ms, RL=100Ω VOUT ≥-0.6V, RL=100Ω tF<1ms, RL=100Ω MIN 0.6 60 -15 -50 TYP 1.0 75 -30 -75 MAX UNIT A V V V MIN 7.76 TYP 8.00 24 8 2 10 240 32 0.5 110 1.0 75 -30 -75 MAX 8.24 80 80 10 20 UNIT V mV mV mA mA µVrms mV V mV A V V V TYP 10.00 30 10 2 10 300 40 0.5 110 1.0 75 -30 -75 MAX 10.30 100 100 10 20 TYP 12.00 36 12 2 10 360 44 0.5 110 1.0 75 -30 -75 MAX 12.36 120 120 10 20 For LM2937-8.0V PARAMETER Output Voltage Line Regulation Load Regulation SYMBOL VOUT △VOUT △VOUT Quiescent Current IQ Output Noise Voltage Long Term Stability eN Dropout Voltage VD Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage ISC TIN VRIN VTRRI TEST CONDITIONS 5mA≤IOUT≤500mA VOUT+2V≤VIN≤26V, IOUT=5mA 5mA≤IOUT≤500mA (VOUT+2V)≤VIN ≤26V,IOUT=5mA VIN= Vo+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA tF≤100ms, RL=100Ω VOUT ≥-0.6V, RL=100Ω tF<1ms, RL=100Ω 0.6 60 -15 -50 1.0 250 For LM2937-10.0V PARAMETER Output Voltage Line Regulation Load Regulation SYMBOL VOUT △VOUT △VOUT Quiescent Current IQ Output Noise Voltage Long Term Stability eN Dropout Voltage VD Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage ISC TIN VRIN VTRRI TEST CONDITIONS 5mA≤IOUT≤500mA VOUT+2V≤VIN≤26V, IOUT=5mA 5mA≤IOUT≤500mA (VOUT+2V)≤VIN ≤26V,IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA tF≤100ms ,RL=100Ω VOUT≥-0.6V ,RL=100Ω tF<1ms ,RL=100Ω MIN 9.70 0.6 60 -15 -50 1.0 250 UNIT V mV mV mA mA µVrms mV V mV A V V V For LM2937-12.0V PARAMETER Output Voltage Line Regulation Load Regulation SYMBOL VOUT △VOUT △VOUT Quiescent Current IQ Output Noise Voltage Long Term Stability eN Dropout Voltage VD Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage ISC TIN VRIN VTRRI TEST CONDITIONS MIN 5mA≤IOUT≤500mA 11.64 VOUT+2V≤VIN≤26V, IOUT=5mA 5mA≤IOUT≤500mA (VOUT+2V)≤VIN ≤26V,IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA 0.6 tF≤100ms, RL=100Ω 60 VOUT≥-0.6V, RL=100Ω -15 tF<1ms, RL=100Ω -50 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 1.0 250 UNIT V mV mV mA mA µVrms mV V mV A V V V 4 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Cont.) For LM2937-15.0V PARAMETER Output Voltage Line Regulation Load Regulation SYMBOL VOUT △VOUT △VOUT Quiescent Current IQ Output Noise Voltage Long Term Stability eN Dropout Voltage VD Short Circuit Current Peak Line Transient Voltage Reverse DC Input Voltage Reverse Transient Input Voltage ISC TIN VRIN VTRRI TEST CONDITIONS MIN 5mA≤IOUT≤500mA 14.55 VOUT+2V≤VIN≤26V, IOUT=5mA 5mA≤IOUT≤500mA (VOUT+2V)≤VIN ≤26V,IOUT=5mA VIN= VOUT+5V, IOUT=500mA 10Hz-100kHz, IOUT=5mA 1000Hrs IOUT=500mA IOUT=50mA 0.6 tF≤100ms, RL=100Ω 60 VOUT≥-0.6V, RL=100Ω -15 tF<1ms, RL=100Ω -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 TYP MAX 0.8 50 100 1.0 250 UNIT V mV mV mA mA µVrms 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 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 2.0 UNIT V V μA 5 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION V IN UNREGULATED INPUT 1 UTC LM2937-XX CIN* 10 μF 3 VOUT 2 REGULATED OUTPUT COUT** 10μF IQ ON/OFF CONTROL APPLICATION V IN UNREGULATED INPUT CIN* 10 μF 4 UTC LM2937-XX N/C 1 3 IQ 5 VOUT 2 ON/OFF REGULATED OUTPUT COUT** 10μF * Required if the regulator is located more than 3 inches from the power supply filter capacitors. **Required for stability. COUT must be at least 10µF (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 3Ω. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS 0.9 TJ=25℃ 0.8 0.6 0.5 0.4 0.3 0.5 0.1 0 0 500 Output Voltage vs Temperature 20 Quiescent Current (mA) 5.02 5.00 4.98 4.96 4.94 0 40 80 Temperature (℃) 120 Quiescent Current vs Temperature 15 10 500mA 250mA 5 5mA 4.92 4.90 -40 0 80 40 Temperature (℃) 0 -40 120 Quiescent Current (mA) 60 0.5A 40 30 0.25A 20 0.05A 5 10 15 20 25 Input Voltage (V) 30 35 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 40 80 Temperature (℃) 120 10 70 50 0 Quiescent Current vs Input Voltage Quiescent Current vs Input Voltage VOUT=5V 90 Ta=25℃ 80 10 0 0 0.05A RL =100Ω 5.04 100 0.25A 0.4 0.3 0.1 0 -40 100 200 300 400 Output Current(mA) 0.5A 0.6 0.2 5.06 Output Voltage (V) 0.7 0.2 5.08 Dropout Voltage vs Temperature 0.9 0.7 5.10 Quiescent Current (mA) 1.0 Dropout Voltage (V) Dropout Voltage ( V) 0.8 Dropout Voltage vs Output Current VIN=14V 9 VOUT=5V TJ=25℃ 8 7 6 5 4 3 2 1 0 0 100 300 400 200 Output Current (mA) 500 7 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) IOUT=50mA VOUT=5 V Ta=25℃ 20 Output Voltage Deviation (mV) Output Voltage Deviation (mV) Load Transient Response Line Transient Response 40 0 50 0 -50 Load Current (A) Input Voltage Change (V) -20 3V 0V -10 0 10 20 30 Time (μs) 40 50 0 60 Ripple Rejection -1 5.0 V IN=10V V OUT=5 V 70 COUT=10μF IOUT=50mA 4.0 Output Voltage (V) Ripple Rejection (dB) 400 60 50 100 1K 10K 100K Frequency (Hz) 4 5 6 5.0 6.0 Low Voltage Behavior IOUT=500mA VOUT=5 V TJ=25℃ 2.0 1M Low Voltage Behavior IOUT=500mA TJ=25℃ 15 VOUT=10V 10 8 V OUT=8 V 6 4 1.0 2.0 4.0 3.0 Input Voltage (V) Low Voltage Behavior IOUT=500mA TJ=25℃ VOUT=15 V 12 VOUT=12 V 9 6 3 2 0 0 0 18 Output Voltage (V) Output Voltage (V) 2 3 Time (μs) 3.0 0 10 12 1 1.0 40 14 0 2 4 6 10 8 Input Voltage (V) 12 14 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0 0 3 12 6 9 Input Voltage (V) 15 18 8 of 10 QW-R102-012.F LM2937 LINEAR INTEGRATED CIRCUIT TYPICAL CHARACTERISTICS(Cont.) Output at Voltage Extremes Output Voltage (V) 10 RL =100Ω VOUT=10V 8 VOUT=8V VOUT=5V 2 VOUT=15V 12 VOUT=12V 8 4 0 0 -2 -30 RL =100Ω 16 6 4 Output at Voltage Extremes 20 Output Voltage (V) 12 -20 -10 0 20 10 Input Voltage (V) 30 -4 -30 40 VIN=14V VOUT=5 V COUT=10μF IOUT=25mA 10 1.0 0.1 0.01 10 100 1K 10K 100K Frequency (Hz) 1M 100 Equivalent Series Resistance (Ω) Output Impedance (Ω) Output Impedance -20 -10 0 20 10 Input Voltage (V) 30 40 Output Capacitor ESR VOUT=5V COUT=10μF 10 1 STABLE REGION 0.1 0.01 0 100 200 300 400 Output Current (mA) 500 Peak Output Current 1.5 Output Current (A) VIN=14V 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