19-2606; Rev 1; 5/03 High-Supply-Voltage, Precision Voltage Reference in SOT23 The MAX6035 typically draws only 73µA of supply current and can source 10mA or sink 2mA of load current. Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external resistor, this device offers a supply current that is virtually independent of the supply voltage and does not require an external resistor. Additionally, this internally compensated device does not require an external compensation capacitor, but is also stable with capacitive loads up to 5µF. Eliminating the external compensation capacitor saves valuable board area in space-critical applications. The supply independent, ultra-low supply current makes this device ideal for battery-operated, high-performance systems. The MAX6035 is available in a 3-pin SOT23 package and is specified for operation from -40°C to +125°C. Applications 4mA to 20mA Industrial Control Loops Li+ Battery Chargers 12-Bit A/D and D/A Converters Digital Multimeters Portable Data-Acquisition Systems Low-Power Test Equipment Typical Operating Circuit Features ♦ Wide Supply Voltage Range: Up to 33V ♦ 25ppm/°C (max) Temperature Coefficient (-40°C to +85°C) ♦ ±0.2% (max) Initial Accuracy ♦ Small 3-Pin SOT23 Package ♦ ♦ ♦ ♦ 95µA (max) Quiescent Supply Current 10mA Source Current, 2mA Sink Current No Output Capacitor Required Stable with Capacitive Loads up to 5µF ♦ Output Voltages: 2.5V, 3.0V, 5.0V Ordering Information PINPACKAGE TOP MARK PART TEMP RANGE MAX6035AAUR25-T -40°C to +125°C 3 SOT23-3 FZMW MAX6035BAUR25-T -40°C to +125°C 3 SOT23-3 FZMX MAX6035AAUR30-T -40°C to +125°C 3 SOT23-3 FZMY MAX6035BAUR30-T -40°C to +125°C 3 SOT23-3 FZMZ MAX6035AAUR50-T -40°C to +125°C 3 SOT23-3 FZNA MAX6035BAUR50-T -40°C to +125°C 3 SOT23-3 FZNB Selector Guide MAXIMUM MAXIMUM OUTPUT INITIAL TEMPCO VOLTAGE ACCURACY (ppm/°C) (V) (%) (-40°C to +85°C) PART MAX6035AAUR25 25 0.20 2.5 MAX6035BAUR25 65 0.50 2.5 MAX6035AAUR30 25 0.20 3.0 MAX6035BAUR30 65 0.50 3.0 MAX6035AAUR50 25 0.20 5.0 MAX6035BAUR50 65 0.50 5.0 +SUPPLY INPUT (SEE SELECTOR GUIDE) Pin Configuration IN OUT 0.1µF* REFERENCE OUT TOP VIEW IN 1 MAX6035 MAX6035 GND *CAPACITOR IS OPTIONAL. 3 GND OUT 2 SOT23 ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX6035 General Description The MAX6035 is a high-voltage, precision micropower voltage reference. This three-terminal device is available with output voltage options of 2.5V, 3.0V, and 5.0V. It is an excellent upgrade for industry-standard devices such as the REF02 and REF43. The MAX6035 offers 14x lower power than the REF02 and 5x lower power than the REF43, as well as a reduced package size from an 8-pin SO to a 3-pin SOT23. The MAX6035 features a proprietary temperature coefficient curvature-correction circuit and laser-trimmed, thin-film resistors that result in a very low temperature coefficient of 25ppm/°C (max) and an initial accuracy of ±0.2% (max). MAX6035 High-Supply-Voltage, Precision Voltage Reference in SOT23 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) IN ............................................................................-0.3V to +36V OUT .............................................................-0.3V to (VIN + 0.3V) OUT Short-Circuit Duration to GND or IN (Note 1).....Continuous Current into Any Pin..........................................................±20mA Continuous Power Dissipation 3-Pin SOT23 (derate 4.0mW/°C above +70°C)............320mW Operating Temperature Range .........................-40°C to +125°C Storage Temperature Range .............................-65°C to +150°C Junction Temperature ......................................................+150°C Lead Temperature (soldering, 10s) .................................+300°C Note 1: Continuous power dissipation should also be observed. 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—MAX6035_AUR25 (2.5V) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Output Voltage SYMBOL VOUT CONDITIONS TA = +25°C TA = 0°C to +70°C Output Voltage Temperature Coefficient (Note 3) TCVOUT TA = -40°C to +85°C TA = -40°C to +125°C Line Regulation (Note 4) ∆VOUT/∆VIN (VOUT + 2V) ≤ VIN ≤ 33V TA = +25°C Load Regulation (Note 4) ∆VOUT/ ∆IOUT TA = -40°C to +125°C OUT Short-Circuit Current ISC Dropout Voltage (Note 7) VIN - VOUT 2 MIN TYP MAX MAX6035A (0.2%) 2.4950 2.5000 2.5050 MAX6035B (0.5%) 2.4875 2.5000 2.5125 MAX6035A 20 MAX6035B 50 MAX6035A 25 MAX6035B 65 MAX6035A 30 MAX6035B 75 TA = +25°C 4 TA = -40°C to +125°C 15 20 Sourcing: 0 ≤ IOUT ≤ 10mA 25 70 Sinking: -2mA ≤ IOUT ≤ 0 45 180 UNITS V ppm/°C µV/V µV/mA Sourcing: 0 ≤ IOUT ≤ 10mA 85 Sinking: -2mA ≤ IOUT ≤ 0 225 Short to GND 27 Short to IN -4 mA IOUT = 10µA 1.9 IOUT = 10mA 2.25 _______________________________________________________________________________________ V High-Supply-Voltage, Precision Voltage Reference in SOT23 (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL Thermal Hysteresis (Note 5) ∆VOUT/cycle CONDITIONS MIN TYP 135 MAX UNITS ppm Long-Term Stability ∆VOUT/time 1000hr at +25°C 110 ppm/ 1000hr f = 0.1Hz to 10Hz 21 µVP-P f = 10Hz to 1kHz 20 µVRMS 86 dB DYNAMIC CHARACTERISTICS Output Noise Voltage en ∆VOUT/∆VIN VIN = 5V ±100mV, f = 120Hz Ripple Rejection Turn-On Settling Time Capacitive-Load Stability (Note 6) tR To VOUT = 0.1% of final value COUT = 50pF 35 COUT = 1µF 240 0 COUT µs 5 µF INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current ∆IIN/∆VIN Inferred from line regulation and dropout voltage 4.4 33 V 73 95 µA 0.4 0.7 µA/V MIN TYP MAX UNITS MAX6035A (0.2%) 2.9940 3.0000 3.0060 MAX6035B (0.5%) 2.9850 3.0000 3.0150 4.4V ≤ VIN ≤ 33V ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Output Voltage SYMBOL VOUT CONDITIONS TA = +25°C TA = 0°C to +70°C Output Voltage Temperature Coefficient (Note 3) TCVOUT TA = -40°C to +85°C TA = -40°C to +125°C Line Regulation (Note 4) ∆VOUT/ ∆VIN (VOUT + 1.75V) ≤ VIN ≤ 33V (VOUT + 2V) ≤ VIN ≤ 33V TA = +25°C Load Regulation (Note 4) ∆VOUT/ ∆IOUT TA = -40°C to +125°C MAX6035A 20 MAX6035B 50 MAX6035A 25 MAX6035B 65 MAX6035A 30 MAX6035B 75 TA = +25°C 4.5 V ppm/°C 15 TA = 0°C to +125°C 24 TA = -40°C to +125°C 24 Sourcing: 0 ≤ IOUT ≤ 10mA 30 81 Sinking: -2mA ≤ IOUT ≤ 0mA 54 170 µV/V µV/mA Sourcing: 0 ≤ IOUT ≤ 10mA 96 Sinking: -2mA ≤ IOUT ≤ 0mA 230 _______________________________________________________________________________________ 3 MAX6035 ELECTRICAL CHARACTERISTICS—MAX6035_AUR25 (2.5V) (continued) MAX6035 High-Supply-Voltage, Precision Voltage Reference in SOT23 ELECTRICAL CHARACTERISTICS—MAX6035_AUR30 (3.0V) (continued) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP Short to GND 27 Short to IN -4 MAX UNITS OUT Short-Circuit Current ISC Dropout Voltage (Note 7) VIN - VOUT Thermal Hysteresis (Note 5) ∆VOUT/cycle 135 ppm Long-Term Stability ∆VOUT/time 1000hr at +25°C 120 ppm/ 1000hr f = 0.1Hz to 10Hz 25 µVP-P f = 10Hz to 1kHz 25 µVRMS VIN = 5V ±100mV, f = 120Hz 80 dB TA = 0°C to +125°C TA = -40°C to +125°C mA IOUT = 10µA 1.75 IOUT = 10µA 1.9 IOUT = 10mA V 2.25 DYNAMIC CHARACTERISTICS Output Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability (Note 6) en ∆VOUT/ ∆VIN tR VOUT = 0.1% of final value COUT = 50pF 40 COUT = 1µF 250 µs 0 5 TA = 0°C to +125°C, inferred from line regulation and dropout voltage 4.75 33 TA = -40°C to +125°C, inferred from line regulation and dropout voltage 4.9 33 COUT µF INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Current Supply IIN Change in Supply Current ∆IIN/∆VIN V 4.9V ≤ VIN ≤ 33V 73 95 µA 0.4 0.7 µA/V ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER Output Voltage SYMBOL VOUT CONDITIONS TA = +25°C TA = 0°C to +70°C Output Voltage Temperature Coefficient (Note 3) TCVOUT TA = -40°C to +85°C TA = -40°C to +125°C Line Regulation (Note 4) 4 ∆VOUT/∆VIN (VOUT + 2V) ≤ VOUT ≤ 33V MIN TYP MAX MAX6035A (0.2%) 4.9900 5.0000 5.0100 MAX6035B (0.5%) 4.9750 5.0000 5.0250 MAX6035A 20 MAX6035B 50 MAX6035A 25 MAX6035B 65 MAX6035A 30 MAX6035B TA = +25°C TA = -40°C to +125°C UNITS V ppm/°C 75 7.5 25 8 40 _______________________________________________________________________________________ µV/V High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035 ELECTRICAL CHARACTERISTICS—MAX6035_AUR50 (5.0V) (continued) (VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 2) PARAMETER SYMBOL CONDITIONS TA = +25°C ∆VOUT/ ∆IOUT Load Regulation (Note 4) TA = -40°C to +125°C MIN TYP MAX Sourcing: 0 ≤ IOUT ≤ 10mA 50 135 Sinking: -2mA ≤ IOUT ≤ 0mA 90 215 UNITS µV/mA Sourcing: 0 ≤ IOUT ≤ 10mA 160 Sinking: -2mA ≤ IOUT ≤ 0mA 300 Shorted to GND 27 Shorted to IN -4 OUT Short-Circuit Current ISC Dropout Voltage (Note 7) VIN - VOUT Thermal Hysteresis (Note 5) ∆VOUT/cycle 135 ppm Long-Term Stability ∆VOUT/time 1000hr at +25°C 160 ppm/ 1000hr f = 0.1Hz to 10Hz 68 µVP-P f = 10Hz to 1kHz 48 µVRMS ∆VOUT/∆VIN VIN = 15V ±100mV, f = 120Hz 72 dB mA IOUT = 10µA 1.9 IOUT = 10mA 2.25 V DYNAMIC CHARACTERISTICS Output Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability (Note 6) en tR To VOUT = 0.1% of final value COUT = 50pF 140 COUT = 1µF 300 COUT µs 0 5 µF 6.9 33 V 80 100 µA 0.4 0.7 µA/V INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Current Supply IIN Change in Supply Current ∆IIN/∆VIN Inferred by line regulation and dropout voltage 6.9V ≤ VIN ≤ 33V Note 2: All devices are 100% production tested at TA = +25°C and are guaranteed by design for TA = TMIN to TMAX, as specified. Note 3: Temperature Coefficient is measured by the “box” method, i.e., the maximum ∆VOUT is divided by the maximum ∆T. Note 4: Line and load regulation are measured with pulses and do not include output voltage fluctuation due to die-temperature changes. Note 5: Thermal Hysteresis is defined as the change in the output voltage at TA = +25°C before and after cycling the device from TMAX to TMIN. Note 6: Guaranteed by design. Note 7: Although the source current is guaranteed to be 10mA, exercise caution to ensure that the package’s absolute power dissipation rating is not exceeded. _______________________________________________________________________________________ 5 Typical Operating Characteristics (VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.) OUTPUT VOLTAGE (V) 2.5015 2.5010 2.5005 2.999 2.997 5.001 5.000 2.995 4.998 2.4995 4.997 -15 10 60 35 110 85 -40 -15 10 35 -40 110 85 60 60 35 110 85 TEMPERATURE (°C) MAX6035 LINE REGULATION (VOUT = 2.5V) MAX6035 LINE REGULATION (VOUT = 3V) MAX6035 LINE REGULATION (VOUT = 5V) TA = +85°C 2.4995 2.4990 TA = +25°C 2.4985 TA = +85°C 2.9995 OUTPUT VOLTAGE (V) 2.5000 TA = +125°C 3.0000 2.4980 2.9990 TA = +25°C 2.9985 2.9980 2.9975 TA = -40°C 2.9970 2.4975 22 TA = +85°C 4.9985 TA = +25°C 4.9980 TA = -40°C 4.9970 4 34 28 4.9990 4.9975 2.9960 16 TA = +125°C 2.9965 TA = -40°C 2.4970 10 4.9995 MAX6035 toc05 TA = +125°C 3.0005 OUTPUT VOLTAGE (V) 2.5005 10 16 22 28 6 34 10 14 18 22 26 30 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) MAX6035 LOAD REGULATION (VOUT = 2.5V) MAX6035 LOAD REGULATION (VOUT = 3V) MAX6035 LOAD REGULATION (VOUT = 5V) 2.4995 TA = +85°C 2.4990 2.4985 2.4980 TA = +25°C 2.4975 TA = +85°C MAX6035 toc08 2.9995 2.9990 2.9985 2.9980 2.9975 TA = +25°C 2.9970 2.9965 2.4970 2.4965 0 2 4 6 LOAD CURRENT (mA) 8 TA = +85°C 4.999 4.998 4.997 TA = +25°C 4.996 TA = -40°C TA = -40°C 4.994 2.9955 10 TA = +125°C 5.000 34 4.995 2.9960 TA = -40°C 5.001 OUTPUT VOLTAGE (V) TA = +125°C 2.5000 TA = +125°C 3.0000 OUTPUT VOLTAGE (V) 2.5005 3.0005 MAX6035 toc07 2.5010 -2 10 TEMPERATURE (°C) 2.5010 4 -15 TEMPERATURE (°C) MAX6035 toc04 -40 MAX6035 toc06 2.993 2.4990 OUTPUT VOLTAGE (V) 5.002 4.999 2.5000 6 5.003 MAX6035 toc09 OUTPUT VOLTAGE (V) 2.5020 THREE TYPICAL PARTS 5.004 OUTPUT VOLTAGE (V) 3.001 MAX6035 toc03 THREE TYPICAL PARTS 2.5025 5.005 MAX6035 toc02 THREE TYPICAL PARTS 2.5030 3.003 MAX6035 toc01 2.5035 MAX6035AAUR50 OUTPUT VOLTAGE TEMPERATURE DRIFT MAX6035AAUR30 OUTPUT VOLTAGE TEMPERATURE DRIFT MAX6035AAUR25 OUTPUT VOLTAGE TEMPERATURE DRIFT OUTPUT VOLTAGE (V) MAX6035 High-Supply-Voltage, Precision Voltage Reference in SOT23 -2 0 2 4 6 LOAD CURRENT (mA) 8 10 -2 0 2 4 6 LOAD CURRENT (mA) _______________________________________________________________________________________ 8 10 High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V) -20 -60 -60 -80 -80 -80 -100 -100 -100 -120 0.001 0.1 10 1000 0.1 10 1000 0.001 10 1000 FREQUENCY (kHz) MAX6035 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 2.5V) MAX6035 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 3V) MAX6035 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 5V) TA = +125°C TA = -40°C 85 TA = +25°C 80 75 70 10 16 22 28 TA = +25°C 80 TA = +125°C 70 4 34 TA = -40°C 85 75 TA = +125°C 70 65 MAX6035 toc15 90 SUPPLY CURRENT (µA) 80 95 MAX6035 toc14 90 SUPPLY CURRENT (µA) TA = +25°C 75 95 MAX6035 toc13 TA = -40°C 10 16 22 28 34 6 12 18 24 30 INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) MAX6035 OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 2.5V) MAX6035 OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 3V) MAX6035 OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 5V) 200 100 250 OUTPUT IMPEDANCE (Ω) OUTPUT IMPEDANCE (Ω) 300 300 300 200 100 MAX6035 toc18 400 MAX6035 toc16 400 MAX6035 toc17 4 0.1 FREQUENCY (kHz) 90 85 -120 0.001 FREQUENCY (kHz) 95 SUPPLY CURRENT (µA) -40 PSRR (dB) -60 -120 OUTPUT IMPEDANCE (Ω) -20 -40 PSRR (dB) PSRR (dB) -40 MAX6035 toc12 -20 0 MAX6035 toc11 0 MAX6035 toc10 0 MAX6035 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 5V) MAX6035 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 3V) 200 150 100 50 0 0 0 0.01 0.1 1 10 FREQUENCY (kHz) 100 1000 0.001 0.1 10 FREQUENCY (kHz) 1000 0.01 0.1 1 10 100 1000 FREQUENCY (kHz) _______________________________________________________________________________________ 7 MAX6035 Typical Operating Characteristics (continued) (VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.) MAX6035 High-Supply-Voltage, Precision Voltage Reference in SOT23 Typical Operating Characteristics (continued) (VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.) MAX6035 0.1Hz to 10Hz OUTPUT NOISE (VOUT = 5V) MAX6035 0.1Hz to 10Hz OUTPUT NOISE (VOUT = 3V) MAX6035 0.1Hz to 10Hz OUTPUT NOISE (VOUT = 2.5V) MAX6035 toc21 MAX6035 toc20 MAX6035 toc19 1s/div 1s/div 1s/div MAX6035 10Hz to 1kHz OUTPUT NOISE (VOUT = 2.5V) MAX6035 10Hz to 1kHz OUTPUT NOISE (VOUT = 3V) MAX6035 10Hz to 1kHz OUTPUT NOISE (VOUT = 5V) MAX6035 toc22 MAX6035 toc23 50µV/div MAX6035 toc24 50µV/div 100ms/div 100ms/div MAX6035 TURN-ON TRANSIENT (VOUT = 3V) MAX6035 toc25 MAX6035 TURN-ON TRANSIENT (VOUT = 5V) MAX6035 toc26 CL = 50pF MAX6035 toc27 CL = 50pF CL = 50pF VIN 5V/div 0V VIN 5V/div 0V VIN 10V/div VOUT 1V/div 0V VOUT 1V/div 0V VOUT 2V/div 10µs/div 100µV/div 100ms/div MAX6035 TURN-ON TRANSIENT (VOUT = 2.5V) 8 20µV/div 10µV/div 10µV/div 10µs/div 40µs/div _______________________________________________________________________________________ High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035 LOAD TRANSIENT (VOUT = 3V) MAX6035 LOAD TRANSIENT (VOUT = 2.5V) MAX6035 toc28 VOUT AC-COUPLED 100mV/div VL 10V/div MAX6035 LOAD TRANSIENT (VOUT = 5V) MAX6035 toc29 MAX6035 toc30 VOUT AC-COUPLED 200mV/div VOUT AC-COUPLED 100mV/div VL 10V/div VL 10V/div 40µs/div (IOUT = ±250µA, CL = 0, RL = 10kΩ) (Figure 1) 20µs/div (IOUT = ±250µA, CL = 0, RL = 12kΩ) (Figure 1) 20µs/div (IOUT = ±250µA, CL = 0, RL = 20kΩ) (Figure 1) MAX6035 LOAD TRANSIENT (VOUT = 3V) MAX6035 LOAD TRANSIENT (VOUT = 2.5V) MAX6035 LOAD TRANSIENT (VOUT = 5V) MAX6035 toc32 MAX6035 toc31 MAX6035 toc33 VOUT AC-COUPLED 20mV/div VOUT AC-COUPLED 20mV/div VOUT AC-COUPLED 20mV/div VL 5V/div VL 10V/div VL 10V/div 100µs/div (IOUT = ±250µA, CL = 1µF, RL = 10kΩ) (Figure 1) 100µs/div (IOUT = ±250µA, CL = 1µF, RL = 12kΩ) (Figure 1) MAX6035 LOAD TRANSIENT (VOUT = 2.5V) MAX6035 LOAD TRANSIENT (VOUT = 3V) MAX6035 toc34 100µs/div (IOUT = ±250µA, CL = 1µF, RL = 20kΩ) (Figure 1) MAX6035 LOAD TRANSIENT (VOUT = 5V) MAX6035 toc35 MAX6035 toc36 VOUT AC-COUPLED 500mV/div VOUT AC-COUPLED 500mV/div VOUT AC-COUPLED 500mV/div VL 5V/div VL 5V/div VL 10V/div 10µs/div (IOUT = ±2mA, CL = 0, RL = 1.25kΩ) (Figure 1) 40µs/div (IOUT = ±2mA, CL = 0, RL = 1.5kΩ) (Figure 1) 20µs/div (IOUT = ±2mA, CL = 0, RL = 2.5kΩ) (Figure 1) _______________________________________________________________________________________ 9 MAX6035 Typical Operating Characteristics (continued) (VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.) MAX6035 High-Supply-Voltage, Precision Voltage Reference in SOT23 Typical Operating Characteristics (continued) (VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.) MAX6035 LOAD TRANSIENT (VOUT = 5V) MAX6035 LOAD TRANSIENT (VOUT = 3V) MAX6035 LOAD TRANSIENT (VOUT = 2.5V) MAX6035 toc38 MAX6035 toc37 MAX6035 toc39 VOUT AC-COUPLED 100mV/div VOUT AC-COUPLED 100mV/div VOUT AC-COUPLED 20mV/div VL 5V/div VL 10V/div VL 10V/div 100µs/div (IOUT = ±2mA, CL = 1µF, RL = 1.5kΩ) (Figure 1) 40µs/div (IOUT = ±2mA, CL = 1µF, RL = 1.25kΩ) (Figure 1) MAX6035 LOAD TRANSIENT (VOUT = 2.5V) 200µs/div (IOUT = ±2mA, CL = 1µF, RL = 2.5kΩ) (Figure 1) MAX6035 LOAD TRANSIENT (VOUT = 5V) MAX6035 LOAD TRANSIENT (VOUT = 3V) MAX6035 toc40 MAX6035 toc42 MAX6035 toc41 VOUT AC-COUPLED 500mV/div VOUT AC-COUPLED 500mV/div VOUT AC-COUPLED 20mV/div VL 5V/div VL 5V/div VL 5V/div 20µs/div (IOUT = 0 to 10mA, CL = 0, RL = 250Ω) (Figure 2) 10 20µs/div (IOUT = 0 to 10mA, CL = 0, RL = 300Ω) (Figure 2) 200µs/div (IOUT = 0 to 10mA, CL = 0, RL = 500Ω) (Figure 2) ______________________________________________________________________________________ High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035 LOAD TRANSIENT (VOUT = 2.5V) MAX6035 toc43 VOUT AC-COUPLED 100mV/div MAX6035 LOAD TRANSIENT (VOUT = 5V) MAX6035 LOAD TRANSIENT (VOUT = 3V) MAX6035 toc45 MAX6035 toc44 VOUT AC-COUPLED 100mV/div VOUT AC-COUPLED 100mV/div VL 5V/div VL 5V/div VL 5V/div 100µs/div (IOUT = 0 to 10mA, CL = 1µF, RL = 250Ω) (Figure 2) 100µs/div (IOUT = 0 to 10mA, CL = 1µF, RL = 500Ω) (Figure 2) 100µs/div (IOUT = 0 to 10mA, CL = 1µF, RL = 300Ω) (Figure 2) MAX6035 LINE TRANSIENT (VOUT = 2.5V) MAX6035 LINE TRANSIENT (VOUT = 3V) MAX6035 LINE TRANSIENT (VOUT = 5V) MAX6035 toc46 MAX6035 toc47 MAX6035 toc48 CL = 0 CL = 0 CL = 0 VIN 500mV/div VIN 500mV/div VIN 500mV/div VOUT AC-COUPLED 100mV/div VOUT AC-COUPLED 100mV/div VOUT AC-COUPLED 100mV/div 4µs/div 10µs/div +VIN +VIN MAX6035 4µs/div MAX6035 VOUT VOUT VOUT VOUT CL CL RL RL VL 2VOUT VL 0V 0V Figure 1. Load-Transient Test Circuit VOUT Figure 2. Load-Transient Test Circuit ______________________________________________________________________________________ 11 MAX6035 Typical Operating Characteristics (continued) (VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25°C, unless otherwise noted.) High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035 Pin Description PIN NAME FUNCTION 1 IN 2 OUT Input Voltage Reference Output 3 GND Ground rent, even if the load current is not present at the time. In the MAX6035 family, the load current is drawn from the input voltage only when required, so supply current is not wasted and efficiency is maximized at all input voltages. This improved efficiency reduces power dissipation and extends battery life. Thermal Hysteresis Applications Information Input Bypassing For the best line-transient performance, decouple the input with a 0.1µF ceramic capacitor as shown in the Typical Operating Circuit. Locate the capacitor as close to the device as possible. Where transient performance is less important, no capacitor is necessary. Output/Load Capacitance Devices in the MAX6035 family do not require any output capacitance for frequency stability. In applications where the load or the supply can experience step changes, an output capacitor of at least 0.1µF reduces the amount of overshoot (undershoot) and improves the circuit’s transient response. Many applications do not require an external capacitor, and the MAX6035 family can offer a significant advantage in these applications when board space is critical. Supply Current The quiescent supply current of the MAX6035 seriesmode family is typically 73µA and is virtually independent of the supply voltage, with only a 0.7µA/V (max) variation with supply voltage. In contrast, the quiescent current of a shunt-mode reference is a function of the input voltage due to a series resistor connected to the power supply. Additionally, shunt-mode references have to be biased at the maximum expected load cur- 12 Thermal hysteresis is the change of output voltage at TA = +25°C before and after the device is cycled over its entire operating temperature range. The typical temperature hysteresis value is 135ppm. Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 240µs. Increased output capacitance also increases turn-on time. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error In a data converter application, the reference voltage of the converter must stay within a certain limit to keep the error in the data converter smaller than the resolution limit through the operating temperature range. Figure 3 shows the maximum allowable reference-voltage temperature coefficient to keep the conversion error to less than 1LSB, as a function of the operating temperature range (TMAX - TMIN) with the converter resolution as a parameter. The graph assumes the reference-voltage temperature coefficient as the only parameter affecting accuracy. In reality, the absolute static accuracy of a data converter is dependent on the combination of many parameters such as integral nonlinearity, differential nonlinearity, offset error, gain error, as well as voltage reference changes. ______________________________________________________________________________________ High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035 10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/°C) 8 BIT 10 10 BIT 12 BIT 1 14 BIT 16 BIT 0.1 18 BIT 0.01 1 10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C) 20 BIT 100 Figure 3. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error Chip Information TRANSISTOR COUNT: 84 PROCESS: BiCMOS ______________________________________________________________________________________ 13 Package Information (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages. SOT23 L.EPS MAX6035 High-Supply-Voltage, Precision Voltage Reference in SOT23 PACKAGE OUTLINE, 3L SOT-23 21-0051 F 1 1 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 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.