LM4050_EM3-50

19-2563; Rev 5; 5/11 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages General Description The LM4050/LM4051 are precision two-terminal, shuntmode, bandgap voltage references available in fixed reverse breakdown voltages of 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V. Ideal for space-critical applications, the LM4050/LM4051 are offered in the subminiature 3-pin SC70 surface-mount packages (1.8mm x 1.8mm), 50% smaller than comparable devices in SOT23 surface-mount package (SOT23 versions are also available). Laser-trimmed resistors ensure excellent initial accuracy. With a 50ppm/°C temperature coefficient, these devices are offered in three grades of initial accuracy ranging from 0.1% to 0.5%. The LM4050/LM4051 have a 60µA to 15mA shunt-current capability with low dynamic impedance, ensuring stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents. The LM4050/LM4051 do not require an external stabilizing capacitor while ensuring stability with any capacitive loads. The LM4050/LM4051 specifications are guaranteed over the temperature range of -40°C to +125°C. Features o 50ppm/°C (max) Temperature Coefficient Guaranteed over the -40°C to +125°C Temperature Range o Ultra-Small 3-Pin SC70 Package o 0.1% (max) Initial Accuracy o Wide Operating Current Range: 60µA to 15mA o Low 28µVRMS Output Noise (10Hz to 10kHz) o 1.225V, 2.048V, 2.500V, 3.000V, 3.3V, 4.096V, and 5.000V Fixed Reverse Breakdown Voltages o No Output Capacitors Required o Tolerates Capacitive Loads LM4050/LM4051 Selector Guide PIN TEMP RANGE OUTPUT PINVOLTAGE PACKAGE (V) 2.048 2.048 2.500 2.500 3.000 3.000 3.300 3.300 3.300 4.096 4.096 4.096 5.000 5.000 5.000 1.225 1.225 ________________________Applications Portable, Battery-Powered Equipment Notebook Computers Cell Phones Industrial Process Controls Typical Operating Circuit VS ISHUNT + ILOAD RS ILOAD VR ISHUNT -40°C to +125°C 3 SOT23 LM4050_EM3-2.1+T -40°C to +125°C LM4050_EX3-2.1+T 3 SC70 -40°C to +125°C 3 SOT23 LM4050_EM3-2.5+T -40°C to +125°C LM4050_EX3-2.5+T 3 SC70 -40°C to +125°C 3 SOT23 LM4050_EM3-3.0+T -40°C to +125°C LM4050_EX3-3.0+T 3 SC70 -40°C to +125°C 3 SOT23 LM4050_EM3-3.3+T -40°C to +125°C LM4050_EX3-3.3+T 3 SC70 LM4050_EX3-3.3/V+T -40°C to +125°C 3 SC70 -40°C to +125°C 3 SOT23 LM4050_EM3-4.1+T LM4050_EM3-4.1/V+T -40°C to +125°C 3 SOT23 -40°C to +125°C LM4050_EX3-4.1+T 3 SC70 -40°C to +125°C 3 SOT23 LM4050_EM3-5.0+T LM4050_EM3-5.0/V+T -40°C to +125°C 3 SOT23 -40°C to +125°C LM4050_EX3-5.0+T 3 SC70 -40°C to +125°C 3 SOT23 LM4051_EM3-1.2+T -40°C to +125°C LM4051_EX3-1.2+T 3 SC70 +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. /V Denotes an automotive qualified part. Ordering Information appears at end of data sheet. Pin Configuration TOP VIEW + 1 LM4050/ LM4051 3 N.C.* LM4050 -2 SC70/SOT23 *PIN 3 MUST BE LEFT UNCONNECTED OR CONNECTED TO PIN 2. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 ABSOLUTE MAXIMUM RATINGS Reverse Current (cathode to anode) ..................................20mA Forward Current (anode to cathode) ..................................10mA Continuous Power Dissipation (TA = +70°C) 3-Pin SC70 (derate 2.17mW/°C above +70°C) ............174mW 3-Pin SOT23 (derate 4.01mW/°C above +70°C)..........320mW Operating Temperature Range LM4050/LM4051_E_ _ _ ................................-40°C to +125°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s)..................................+300°C Soldering Temperature (reflow) .......................................+260°C Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS—1.225V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4051A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN ∆VR/∆T IR = 10mA IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 12mA IR = 1mA, f = 120Hz, IAC = 0.1IR IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h LM4051B LM4051C CONDITIONS LM4051A (0.1%) LM4051B (0.2%) LM4051C (0.5%) MIN 1.2238 1.2226 1.2189 TYP 1.2250 1.2250 1.2250 ±1.2 ±2.4 ±6.0 45 ±20 ±15 ±15 0.7 2.5 0.5 20 120 1.5 mV 8.0 1.5 Ω µVRMS ppm MAX 1.2262 1.2275 1.2311 ±7 ±9 ±12 60 ±50 µA ppm/°C mV V UNITS 2 _______________________________________________________________________________________ 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages ELECTRICAL CHARACTERISTICS—2.048V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4050A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN ∆VR/∆T IR = 10mA IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4050A/B LM4050C LM4050B LM4050C CONDITIONS LM4050A (0.1%) LM4050B (0.2%) LM4050C (0.5%) MIN 2.0460 2.0439 2.0378 TYP 2.0480 2.0480 2.0480 ±2.0 ±4.0 ±10 45 ±20 ±15 ±15 0.3 2.5 0.3 0.3 28 120 1.0 mV 8.0 0.8 0.9 Ω µVRMS ppm MAX 2.0500 2.0521 2.0582 ±12 ±14 ±20 65 ±50 µA ppm/°C mV V UNITS LM4050/LM4051 IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h _______________________________________________________________________________________ 3 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 ELECTRICAL CHARACTERISTICS—2.500V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4050A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN IR = 10mA ∆VR/∆T IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4050A/B LM4050C LM4050B LM4050C CONDITIONS LM4050A (0.1%) LM4050B (0.2%) LM4050C (0.5%) MIN 2.4975 2.4950 2.4875 TYP 2.5000 2.5000 2.5000 ±2.5 ±5.0 ±13 45 ±20 ±15 ±15 0.3 2.5 0.3 0.3 35 120 1.0 mV 8.0 0.8 0.9 Ω µVRMS ppm ±50 ppm/°C MAX 2.5025 2.5050 2.5125 ±15 ±18 ±25 65 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h 4 _______________________________________________________________________________________ 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 ELECTRICAL CHARACTERISTICS—3.000V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4050A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN IR = 10mA ∆VR/∆T IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4050A/B LM4050C LM4050B LM4050C CONDITIONS LM4050A (0.1%) LM4050B (0.2%) LM4050C (0.5%) MIN 2.9970 2.9940 2.9850 TYP 3.0000 3.0000 3.0000 ±3.0 ±6.0 ±15 45 ±20 ±15 ±15 0.3 2.5 0.3 0.3 45 120 1.0 mV 8.0 0.8 0.9 Ω µVRMS ppm ±50 ppm/°C MAX 3.0030 3.0060 3.0150 ±18 ±21 ±30 67 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h ELECTRICAL CHARACTERISTICS—3.300V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4050A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN IR = 10mA ∆VR/∆T IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR LM4050A/B LM4050C LM4050B LM4050C CONDITIONS LM4050A (0.1%) LM4050B (0.2%) LM4050C (0.5%) MIN 3.2967 3.2934 3.2835 TYP 3.3000 3.3000 3.3000 ±3.0 ±6.0 ±15 45 ±20 ±15 ±15 0.3 2.5 0.3 0.3 50 120 1.0 mV 8.0 0.8 0.9 Ω µVRMS ppm ±50 ppm/°C MAX 3.3033 3.3066 3.3165 ±18 ±21 ±30 67 µA mV V UNITS IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h _______________________________________________________________________________________ 5 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 ELECTRICAL CHARACTERISTICS—4.096V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4050A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN IR = 10mA ∆VR/∆T IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h LM4050B LM4050C CONDITIONS LM4050A (0.1%) LM4050B (0.2%) LM4050C (0.5%) MIN 4.0919 4.0878 4.0755 TYP 4.0960 4.0960 4.0960 ±4.1 ±8.2 ±20 50 ±30 ±20 ±15 0.5 3.0 0.5 64 120 1.2 mV 10.0 1.0 Ω µVRMS ppm ±50 ppm/°C MAX 4.1001 4.1042 4.1165 ±25 ±29 ±41 73 µA mV V UNITS 6 _______________________________________________________________________________________ 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages ELECTRICAL CHARACTERISTICS—5.000V (IR = 100µA, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Reverse Breakdown Voltage SYMBOL VR TA = +25°C LM4050A Reverse Breakdown Voltage Tolerance (Note 2) Minimum Operating Current Average Reverse Voltage Temperature Coefficient (Notes 2, 3) Reverse Breakdown Voltage Change with Operating Current Change Reverse Dynamic Impedance (Note 3) Wideband Noise Reverse Breakdown Voltage Long-Term Stability ZR eN ∆VR VRTOL IRMIN IR = 10mA ∆VR/∆T IR = 1mA IR = 100µA IRMIN ≤ IR ≤ 1mA 1mA ≤ IR ≤ 15mA IR = 1mA, f = 120Hz, IAC = 0.1IR IR = 100µA, 10Hz ≤ f ≤ 10kHz T = 1000h LM4050B LM4050C CONDITIONS LM4050A (0.1%) LM4050B (0.2%) LM4050C (0.5%) MIN 4.9950 4.9900 4.9750 TYP 5.0000 5.0000 5.0000 ±5.0 ±10 ±25 54 ±30 ±20 ±15 0.5 3.5 0.5 80 120 1.4 mV 12.0 1.1 Ω µVRMS ppm ±50 ppm/°C MAX 5.0050 5.0100 5.0250 ±30 ±35 ±50 80 µA mV V UNITS LM4050/LM4051 Note 1: All devices are 100% production tested at +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified. Note 2: The limit over the full temperature range for the reverse breakdown voltage tolerance is defined as: [VRTOL] ±[(∆VR / ∆T) X (max∆T) X (VR)] where ∆VR / ∆T is the VR temperature coefficient, max∆T is the difference from the +25°C reference point to TMIN or TMAX, and VR is the reverse breakdown voltage. The total tolerance over the full temperature range for the different grades where max∆T = +100°C is shown below: • A grade: ±0.6% = ±0.1% ±50ppm/°C  100°C • B grade: ±0.7% = ±0.2% ±50ppm/°C  100°C • C grade: ±1.0% = ±0.5% ±50ppm/°C  100°C Note 3: Guaranteed by design. _______________________________________________________________________________________ 7 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 Typical Operating Characteristics (IR = 100µA, SC70-3 package, TA = +25°C, unless otherwise noted.) REVERSE CHARACTERISTICS AND MINIMUM OPERATING CURRENT LM4050 toc01 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.500V) MAX4050 toc02 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 5.000V) 5.003 5.001 OUTPUT VOLTAGE (V) 4.999 4.997 4.995 4.993 4.991 4.989 MAX4050 toc03 6 5 REVERSE VOLTAGE (V) 4 2.498 LM4050_I_3-4.1 LM4050_I_3-5.0 LM4050_I_3-3.0 3 2 LM4050_I_3-2.5 1 0 0 50 REVERSE CURRENT (µA) 100 LM4050_I_3-2.1 OUTPUT VOLTAGE (V) 2.496 2.494 2.492 2.490 -40 -15 10 35 60 85 110 135 TEMPERATURE (°C) 4.987 -40 -15 10 35 60 85 110 135 TEMPERATURE (°C) LM4050-2.5V REVERSE VOLTAGE vs. ISHUNT LM4050 toc04 LM4050-5.0V REVERSE VOLTAGE vs. ISHUNT LM4050 toc05 5 TA = +125°C REVERSE VOLTAGE CHANGE (mV) 4 TA = -40°C 6 REVERSE VOLTAGE CHANGE (mV) 5 4 3 2 1 TA = +25°C 0 TA = +85°C TA = -40°C 3 TA = +25°C TA = +85°C TA = +125°C 2 1 0 0 5 10 ISHUNT (mA) 15 20 0 5 10 ISHUNT (mA) 15 20 8 _______________________________________________________________________________________ 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 Typical Operating Characteristics (continued) (IR = 100µA, SC70-3 package, TA = +25°C, unless otherwise noted.) LM4050-2.5V LOAD-TRANSIENT RESPONSE LM4050 toc06 LM4050-5.0V LOAD-TRANSIENT RESPONSE LM4050 toc07 LM4050-2.5V LOAD-TRANSIENT RESPONSE LM4050 toc08 +25µA VGEN VGEN +25µA VGEN +250µA -25µA VR AC-COUPLED VR AC-COUPLED -25µA VR AC-COUPLED -250µA 2mV/div 10mV/div 10mV/div 10µs/div CH1: VGEN 2V/div CH2: VR AC-COUPLED 2mV/div ISHUNT = 100µA ± 25µA, RL = 100kΩ, SEE FIGURE 1. 40µs/div ISHUNT = 100µA ± 25µA RL = 100kΩ, SEE FIGURE 1. 10µs/div ISHUNT = 1mA ± 250µA RL = 10kΩ, SEE FIGURE 1. LM4050-5.0V LOAD-TRANSIENT RESPONSE LM4050 toc09 LM4050-2.5V LOAD-TRANSIENT RESPONSE LM4050 toc10 LM4050-5.0V LOAD-TRANSIENT RESPONSE LM4050 toc11 +250µA VGEN VGEN +2.5mA VGEN +2.5mA -250µA VR AC-COUPLED VR AC-COUPLED -2.5mA VR AC-COUPLED -2.5mA 10mV/div 20mV/div 20mV/div 10µs/div ISHUNT = 1mA ± 250µA RL = 10kΩ, SEE FIGURE 1. 10µs/div ISHUNT = 10mA ± 2.5mA RL = 1kΩ, SEE FIGURE 1. 10µs/div ISHUNT = 10mA ± 2.5mA RL = 1kΩ, SEE FIGURE 1. ISHUNT 1kΩ RL VR VGEN VB + - Figure 1. Load-Transient Test Circuit _______________________________________________________________________________________ 9 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 Typical Operating Characteristics (continued) (IR = 100µA, SC70-3 package, TA = +25°C, unless otherwise noted.) LM4050-2.5V STARTUP CHARACTERISTICS LM4050 toc12 LM4050-5.0V STARTUP CHARACTERISTICS LM4050 toc13 LM4050-2.5V OUTPUT IMPEDANCE vs. FREQUENCY LM4050 toc14 1000 C1 = 1µF 100 IMPEDANCE (Ω) IR = 150µA 5V VIN 0 VIN 5V 0 2V VOUT 1V 0 RS = 30kΩ 0 4 8 12 16 20 24 28 32 36 RESPONSE TIME (µs) SEE FIGURE 2. VOUT 4V 2V 0 RS = 16kΩ 0 10 20 30 40 50 60 70 80 90 RESPONSE TIME (µs) SEE FIGURE 2. 10 C1 = 0 1 IR = 1mA 0.1 0.1k 1k 10k FREQUENCY (Hz) 100k 1M LM4050-5.0V OUTPUT IMPEDANCE vs. FREQUENCY C1 = 0 LM4050 toc15 LM4050-2.5V NOISE vs. FREQUENCY LM4050 toc16 LM4050-5.0V NOISE vs. FREQUENCY LM4050 toc17 100 10,000 10,000 IMPEDANCE (Ω) NOISE (nV/√Hz) 1000 NOISE (nV/√Hz) 1 10 100 FREQUENCY (Hz) 1k 10k 10 IR = 150µA 1000 1 IR = 1mA C1 = 1µF 0.1 0.1k 1k 10k FREQUENCY (Hz) 100k 1M 100 100 1 10 100 FREQUENCY (Hz) 1k 10k RS VIN 1Hz RATE 50% DUTY CYCLE VR Figure 2. Startup Characteristics Test Circuit 10 ______________________________________________________________________________________ 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages Pin Description PIN 1 2 3 NAME + − N.C. Positive Terminal of the Shunt Reference Negative Terminal of the Shunt Reference No connection. Leave this pin unconnected or connected to pin 2. FUNCTION LM4050/LM4051 Detailed Description The LM4050/LM4051 shunt references use the bandgap principle to produce a stable, accurate voltage. The device behaves similarly to an ideal zener diode; a fixed voltage is maintained across its output terminals when biased with 60µA to 15mA of reverse current. The LM4050/LM4051 clamps to a voltage of one diode drop below ground when biased with forward currents up 10mA. Figure 3 shows a typical operating circuit. The LM4050/LM4051 are ideal for providing stable references from a high-voltage power supply. VS ISHUNT + ILOAD RS ILOAD VR ISHUNT LM4050 Applications Information The LM4050/LM4051s’ internal pass transistors are used to maintain a constant output voltage (VSHUNT) by sinking the necessary amount of current across a source resistor. The source resistance (RS) is determined from the load current (ILOAD) range, supply voltage (VS) variations, VSHUNT, and desired quiescent current. Choose the value of RS when VS is at a minimum and ILOAD is at a maximum. Maintain a minimum ISHUNT of 60µA at all times. The RS value should be large enough to keep ISHUNT less than 15mA for proper regulation when VS is maximum and ILOAD is at a minimum. To prevent damage to the device, ISHUNT should never exceed 20mA. Therefore, the value of RS is bounded by the following equation: [VS(MIN) - VR ] / [60µA + ILOAD(MAX)] > RS > [VS(MAX) - VR ] / [20mA + ILOAD(MIN)] Choosing a larger resistance minimizes the total power dissipation in the circuit by reducing the shunt current (PD(TOTAL) = VS  ISHUNT). Provide a safety margin to incorporate the worst-case tolerance of the resistor used. Ensure that the resistor’s power rating is adequate, using the following general power equation: PDR = ISHUNT  (VS(MAX) - VSHUNT) Figure 3. Typical Operating Circuit Temperature Performance The LM4050/LM4051 typically exhibit output voltage temperature coefficients within ±15ppm/°C. The polarity of the temperature coefficients may be different from one device to another; some may have positive coefficients, and others may have negative coefficients. High Temperature Operation The maximum junction temperature of the LM4050/ LM4051 is +150°C. The maximum operating temperature for the LM4050/LM4051_E_ is +125°C. At a maximum load current of 15mA and a maximum output voltage of 5V, the parts dissipate 75mW of power. The power dissipation limits of the 3-pin SC70 call for a derating value of 2.17mW/°C above +70°C and thus for 75mW of power dissipation, the parts self-heat to 35.56°C above ambient temperature. If the ambient temperature is +125°C, the parts operate at 159.56°C, thereby exceeding the maximum junction temperature value of +150°C. For hightemperature operation, care must be taken to ensure the combination of ambient temperature, output power dissipation, and package thermal resistance does not conspire to raise the device temperature beyond that listed in the Absolute Maximum Ratings. Either reduce the output load current or the ambient temperature to keep the part within the limits. Output Capacitance The LM4050/LM4051 do not require external capacitors for frequency stability and are stable for any output capacitance. ______________________________________________________________________________________ 11 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 Ordering Information PART LM4050AEM3-2.1+T LM4050AEX3-2.1+T LM4050BEM3-2.1+T LM4050BEX3-2.1+T LM4050CEM3-2.1+T LM4050CEX3-2.1+T LM4050AEM3-2.5+T LM4050AEX3-2.5+T LM4050BEM3-2.5+T LM4050BEX3-2.5+T LM4050CEM3-2.5+T LM4050CEX3-2.5+T LM4050AEM3-3.0+T LM4050AEX3-3.0+T LM4050BEM3-3.0+T LM4050BEX3-3.0+T LM4050CEM3-3.0+T LM4050CEX3-3.0+T LM4050AEX3-3.3+T LM4050AEX3-3.3/V+T LM4050BEX3-3.3+T LM4050CEX3-3.3+T LM4050AEM3-4.1+T LM4050AEX3-4.1+T LM4050BEM3-4.1+T LM4050BEM3-4.1/V+T LM4050BEX3-4.1+T LM4050CEM3-4.1+T LM4050CEX3-4.1+T LM4050AEM3-5.0+T LM4050AEX3-5.0+T LM4050BEM3-5.0+T LM4050BEX3-5.0+T LM4050CEM3-5.0+T LM4050CEM3-5.0/V+T LM4050CEX3-5.0+T LM4051AEM3-1.2+T LM4051AEX3-1.2+T LM4051BEM3-1.2+T LM4051BEX3-1.2+T LM4051CEM3-1.2+T LM4051CEX3-1.2+T OUTPUT INITIAL VOLTAGE (V) ACCURACY (%) 2.048 2.048 2.048 2.048 2.048 2.048 2.500 2.500 2.500 2.500 2.500 2.500 3.000 3.000 3.000 3.000 3.000 3.000 3.300 3.300 3.300 3.300 4.096 4.096 4.096 4.096 4.096 4.096 4.096 5.000 5.000 5.000 5.000 5.000 5.000 5.000 1.225 1.225 1.225 1.225 1.225 1.225 0.1 0.1 0.2 0.2 0.5 0.5 0.1 0.1 0.2 0.2 0.5 0.5 0.1 0.1 0.2 0.2 0.5 0.5 0.1 0.1 0.2 0.5 0.1 0.1 0.2 0.2 0.2 0.5 0.5 0.1 0.1 0.2 0.2 0.5 0.5 0.5 0.1 0.1 0.2 0.2 0.5 0.5 TEMPCO (ppm/_ C) 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 TEMP RANGE -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C -40°C to +125°C PINPACKAGE 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SC70 3 SC70 3 SC70 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 3 SOT23 3 SC70 TOP MARK FZTR ASM FZTS ASN FZTT ASO FZTU ASP FZTV ASQ FZTW ASR FZTX ASS FZTY AST FZTZ ASU AOJ +AUE AOK AOL FZUA ASV FZUB +FZVL ASW FZUC ASX FZUD ASY FZUE ASZ FZUF +FZVM ATA FZTO ASJ FZTP ASK FZTQ ASL 12 ______________________________________________________________________________________ 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages Chip Information PROCESS: BiCMOS Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE 3 SOT23 3 SC70 PACKAGE CODE U3+1 X3+2 OUTLINE NO. 21-0051 21-0075 LAND PATTERN NO. 90-0179 90-0208 LM4050/LM4051 ______________________________________________________________________________________ 13 50ppm/°C Precision Micropower Shunt Voltage References with Multiple Reverse Breakdown Voltages LM4050/LM4051 Revision History REVISION NUMBER 0 4 5 REVISION DATE 7/02 5/09 5/11 Initial release Added lead-free notation and corrected topmarks in the Ordering Information and Selector Guide sections Added automotive packages and updated the Absolute Maximum Ratings. DESCRIPTION PAGES CHANGED — 1, 12 1, 2 Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.