UNISONIC TECHNOLOGIES CO., LTD LM2937 LINEAR INTEGRATED CIRCUIT 500mA LOW DROPOUT VOLTAGE REGULATOR 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. 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 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 Lead Free LM2937L-xx-AA3-R LM2937L-xx-TA3-T LM2937L-xx-TQ2-R LM2937L-xx-TQ2-T LM2937L-xx-TQ3-R LM2937L-xx-TQ3-T LM2937L-xx-TQ5-R LM2937L-xx-TQ5-T Halogen Free LM2937G-xx-AA3-R LM2937G-xx-TA3-T LM2937G-xx-TQ2-R LM2937G-xx-TQ2-T LM2937G-xx-TQ3-R LM2937G-xx-TQ3-T LM2937G-xx-TQ5-R LM2937G-xx-TQ5-T www.unisonic.com.tw Copyright © 2013 Unisonic Technologies Co., Ltd Package Packing SOT-223 TO-220 TO-263 TO-263 TO-263-3 TO-263-3 TO-263-5 TO-263-5 Tape Reel Tube Tape Reel Tube Tape Reel Tube Tape Reel Tube 1 of 10 QW-R102-012.I LM2937 LINEAR INTEGRATED CIRCUIT ORDERING INFORMATION (Cont.) PIN CONFIGURATION PIN NO. SOT-223/TO-220 TO-263/TO-263-3 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 SOT-223 33 50 80 10 12 15 :3.3V :5.0V :8.0V :10V :12V :15V TO-263-5 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 10 QW-R102-012.I 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 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 Junction to Ambient Junction to Case SYMBOL SOT-223 TO-220 TO-263/ TO-263-5 SOT-223 TO-220 TO-263/ TO-263-5 θJA θJC RATINGS 174 65 73 15 3 4 UNIT C/W ELECTRICAL CHARACTERISTICS (VIN=VNOM+5V, IOUT=500mA, COUT=10μF, TJ=Ta=25C, unless otherwise specified.) For LM2937-3.3V PARAMETER SYMBOL TEST CONDITIONS MIN Output Voltage VOUT 5mA≤IOUT≤500mA 3.21 Line Regulation △VOUT VOUT+2V≤VIN≤26V, IOUT=5mA Load Regulation △VOUT 5mA≤IOUT≤500mA (VO+2V)≤VIN ≤26V, IOUT=5mA Quiescent Current IQ VIN= VOUT+5V, IOUT=500mA Output Noise Voltage eN 10Hz-100kHz, IOUT=5mA Long Term Stability 1000Hrs IOUT=500mA Dropout Voltage VD IOUT=50mA Short Circuit Current ISC 0.6 Peak Line Transient Voltage TIN tF≤100ms, RL=100Ω 60 Reverse DC Input Voltage VRIN VOUT ≥-0.6V, RL=100Ω -15 Reverse Transient Input Voltage VTRRI tF<1ms, RL=100Ω -50 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP 3.30 9 3 2 10 100 12 0.5 110 1.0 75 -30 -75 MAX 3.39 30 30 10 20 1.0 250 UNIT V mV mV mA mA μVrms mV V mV A V V V 3 of 10 QW-R102-012.I LM2937 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Cont.) 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 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 TEST CONDITIONS VD tF≤100ms, RL=100Ω VOUT ≥-0.6V, RL=100Ω tF<1ms, RL=100Ω 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 For LM2937-10.0V PARAMETER Output Voltage Line Regulation Load Regulation ISC TIN VRIN VTRRI 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 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 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 4.85 MIN 0.6 60 -15 -50 MIN 7.76 0.6 60 -15 -50 MIN 9.70 0.6 60 -15 -50 TYP 5.00 15 5 2 10 150 20 0.5 110 TYP 1.0 75 -30 -75 MAX 5.15 50 50 10 20 TYP 8.00 24 8 2 10 240 32 0.5 110 1.0 75 -30 -75 MAX 8.24 80 80 10 20 TYP 10.00 30 10 2 10 300 40 0.5 110 1.0 75 -30 -75 MAX 10.30 100 100 10 20 1.0 250 MAX 1.0 250 1.0 250 UNIT V mV mV mA mA μVrms mV V mV UNIT A V V V UNIT V mV mV mA mA μVrms mV V mV A V V V UNIT V mV mV mA mA μVrms mV V mV A V V V 4 of 10 QW-R102-012.I LM2937 LINEAR INTEGRATED CIRCUIT ELECTRICAL CHARACTERISTICS (Cont.) 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 For LM2937-15.0V PARAMETER Output Voltage Line Regulation Load Regulation ISC TIN VRIN VTRRI 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 TYP 12.00 36 12 2 10 360 44 0.5 110 1.0 75 -30 -75 MAX 12.36 120 120 10 20 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 1.0 250 UNIT V mV mV mA mA μVrms mV V mV A V V V 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.I LM2937 TYPICAL APPLICATION ON/OFF CONTROL APPLICATION LINEAR INTEGRATED CIRCUIT * 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.I LM2937 TYPICAL CHARACTERISTICS Dropout Voltage vs Output Current 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.7 0.5 0.1 0 0.1 0 -40 5.08 100 300 400 200 Output Current (mA) 500 Output Voltage vs Temperature 0.25A 0.4 0.3 0.2 0 0.5A 0.6 0.2 5.10 20 0.05A 0 80 40 Temperature (℃) Quiescent Current (mA) 5.04 5.02 5.00 4.98 4.96 4.94 Quiescent Current vs Temperature 15 10 500mA 250mA 5 5mA 4.92 4.90 -40 100 0 80 40 Temperature (℃) 0 -40 120 Quiescent Current (mA) 60 0.5A 40 30 0.25A 20 0.05A 5 25 10 15 20 Input Voltage (V) 30 35 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 80 40 Temperature (℃) 120 10 70 50 0 Quiescent Current vs Input Voltage Quiescent Current vs Input Voltage VOUT=5V 90 Ta=25℃ 80 10 0 0 120 RL=100Ω 5.06 Output Voltage (V) Dropout Voltage vs Temperature 0.9 Dropout Voltage (V) Dropout Voltage ( V) 1.0 TJ=25℃ 0.8 Quiescent Current (mA) LINEAR INTEGRATED CIRCUIT 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.I LM2937 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 -1 4.0 60 50 3 2 Time (μs) 1 4 5 6 5.0 6.0 Low Voltage Behavior IOUT=500mA VOUT=5 V TJ=25℃ 5.0 VIN=10V VOUT=5 V 70 COUT=10μF IOUT=50mA Output Voltage (V) Ripple Rejection (dB) 400 0 60 Ripple Rejection 3.0 2.0 1.0 40 0 10 14 12 1K 10K 100K Frequency (Hz) 100 0 1M Low Voltage Behavior 18 IOUT=500mA TJ=25℃ 15 10 8 VOUT=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 Output Voltage (V) VOUT=10V Output Voltage (V) LINEAR INTEGRATED CIRCUIT 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.I LM2937 TYPICAL CHARACTERISTICS(Cont.) Output at Voltage Extremes RL=100Ω Output Voltage (V) RL=100Ω VOUT=10V 10 8 16 VOUT=8V 6 4 VOUT=5V 2 12 VOUT=12V 8 4 -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 0.01 100 1K 10K 100K 1M Frequency (Hz) 100 Equivalent Series Resistance (Ω) Output Impedance (Ω) Output Impedance 10 VOUT=15V 0 0 -2 -30 Output at Voltage Extremes 20 Output Voltage (V) 12 -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 0 100 400 200 300 Output Current (mA) 500 Peak Output Current 1.5 VIN=14V Output Current (A) LINEAR INTEGRATED CIRCUIT 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.I 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.I