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19-2606; Rev 1; 5/03
High-Supply-Voltage, Precision Voltage Reference in SOT23
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). The MAX6035 typically draws only 73A 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 5F. 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 -40C to +125C.
Features
o Wide Supply Voltage Range: Up to 33V o 25ppm/C (max) Temperature Coefficient (-40C to +85C) o 0.2% (max) Initial Accuracy o Small 3-Pin SOT23 Package o o o o 95A (max) Quiescent Supply Current 10mA Source Current, 2mA Sink Current No Output Capacitor Required Stable with Capacitive Loads up to 5F
MAX6035
o Output Voltages: 2.5V, 3.0V, 5.0V
Ordering Information
PART MAX6035AAUR25-T MAX6035BAUR25-T MAX6035AAUR30-T MAX6035BAUR30-T MAX6035AAUR50-T MAX6035BAUR50-T TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PINPACKAGE TOP MARK
3 SOT23-3 FZMW 3 SOT23-3 FZMX 3 SOT23-3 FZMY 3 SOT23-3 FZMZ 3 SOT23-3 FZNA 3 SOT23-3 FZNB
Selector Guide
PART MAXIMUM MAXIMUM OUTPUT INITIAL TEMPCO VOLTAGE ACCURACY (ppm/C) (V) (%) (-40C to +85C) 25 65 25 65 25 65 0.20 0.50 0.20 0.50 0.20 0.50 2.5 2.5 3.0 3.0 5.0 5.0
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
MAX6035AAUR25 MAX6035BAUR25 MAX6035AAUR30 MAX6035BAUR30 MAX6035AAUR50 MAX6035BAUR50
Typical Operating Circuit
+SUPPLY INPUT (SEE SELECTOR GUIDE)
Pin Configuration
IN OUT 0.1F* REFERENCE OUT
TOP VIEW
IN 1
MAX6035 MAX6035
GND OUT 2 3 GND
*CAPACITOR IS OPTIONAL.
SOT23 1
________________________________________________________________ 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.
High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
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 +70C)............320mW 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.
Operating Temperature Range .........................-40C to +125C Storage Temperature Range .............................-65C to +150C Junction Temperature ......................................................+150C Lead Temperature (soldering, 10s) .................................+300C
ELECTRICAL CHARACTERISTICS--MAX6035_AUR25 (2.5V)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER Output Voltage SYMBOL VOUT TA = +25C TA = 0C to +70C Output Voltage Temperature Coefficient (Note 3) TCVOUT TA = -40C to +85C TA = -40C to +125C Line Regulation (Note 4) VOUT/VIN (VOUT + 2V) VIN 33V CONDITIONS MAX6035A (0.2%) MAX6035B (0.5%) MAX6035A MAX6035B MAX6035A MAX6035B MAX6035A MAX6035B TA = +25C TA = -40C to +125C Sourcing: 0 IOUT 10mA Sinking: -2mA IOUT 0 Sourcing: 0 IOUT 10mA Sinking: -2mA IOUT 0 27 -4 1.9 2.25 25 45 4 MIN 2.4950 2.4875 TYP 2.5000 2.5000 MAX 2.5050 2.5125 20 50 25 65 30 75 15 20 70 180 V/mA 85 225 mA V V/V ppm/C UNITS V
TA = +25C Load Regulation (Note 4) VOUT/ IOUT TA = -40C to +125C
OUT Short-Circuit Current Dropout Voltage (Note 7)
ISC VIN - VOUT
Short to GND Short to IN IOUT = 10A IOUT = 10mA
2
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High-Supply-Voltage, Precision Voltage Reference in SOT23
ELECTRICAL CHARACTERISTICS--MAX6035_AUR25 (2.5V) (continued)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER Thermal Hysteresis (Note 5) Long-Term Stability SYMBOL VOUT/cycle VOUT/time 1000hr at +25C CONDITIONS MIN TYP 135 110 MAX UNITS ppm ppm/ 1000hr VP-P VRMS dB s 5 F
MAX6035
DYNAMIC CHARACTERISTICS Output Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability (Note 6) INPUT CHARACTERISTICS Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN 4.4V VIN 33V Inferred from line regulation and dropout voltage 4.4 73 0.4 33 95 0.7 V A A/V en f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value COUT = 50pF COUT = 1F 0 21 20 86 35 240
VOUT/VIN VIN = 5V 100mV, f = 120Hz tR COUT
ELECTRICAL CHARACTERISTICS--MAX6035_AUR30 (3.0V)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER Output Voltage SYMBOL VOUT TA = +25C TA = 0C to +70C Output Voltage Temperature Coefficient (Note 3) TCVOUT TA = -40C to +85C TA = -40C to +125C VOUT/ VIN (VOUT + 1.75V) VIN 33V (VOUT + 2V) VIN 33V CONDITIONS MAX6035A (0.2%) MAX6035B (0.5%) MAX6035A MAX6035B MAX6035A MAX6035B MAX6035A MAX6035B TA = +25C TA = 0C to +125C TA = -40C to +125C Sourcing: 0 IOUT 10mA Sinking: -2mA IOUT 0mA Sourcing: 0 IOUT 10mA Sinking: -2mA IOUT 0mA 30 54 4.5 MIN 2.9940 2.9850 TYP 3.0000 3.0000 MAX 3.0060 3.0150 20 50 25 65 30 75 15 24 24 81 170 V/mA 96 230 V/V ppm/C UNITS V
Line Regulation (Note 4)
TA = +25C Load Regulation (Note 4) VOUT/ IOUT TA = -40C to +125C
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High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
ELECTRICAL CHARACTERISTICS--MAX6035_AUR30 (3.0V) (continued)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER OUT Short-Circuit Current SYMBOL ISC Short to GND Short to IN TA = 0C to +125C Dropout Voltage (Note 7) Thermal Hysteresis (Note 5) Long-Term Stability VIN - VOUT VOUT/cycle VOUT/time 1000hr at +25C TA = -40C to +125C IOUT = 10A IOUT = 10A IOUT = 10mA 135 120 CONDITIONS MIN TYP 27 -4 1.75 1.9 2.25 ppm ppm/ 1000hr VP-P VRMS dB s 5 F V MAX UNITS mA
DYNAMIC CHARACTERISTICS Output Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability (Note 6) INPUT CHARACTERISTICS TA = 0C to +125C, inferred from line regulation and dropout voltage Supply Voltage Range VIN TA = -40C to +125C, inferred from line regulation and dropout voltage 4.9V VIN 33V 4.75 4.9 73 0.4 33 V 33 95 0.7 A A/V en VOUT/ VIN tR COUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz VIN = 5V 100mV, f = 120Hz VOUT = 0.1% of final value COUT = 50pF COUT = 1F 0 25 25 80 40 250
Quiescent Current Supply Change in Supply Current
IIN IIN/VIN
ELECTRICAL CHARACTERISTICS--MAX6035_AUR50 (5.0V)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER Output Voltage SYMBOL VOUT TA = +25C TA = 0C to +70C Output Voltage Temperature Coefficient (Note 3) TCVOUT TA = -40C to +85C TA = -40C to +125C Line Regulation (Note 4) VOUT/VIN (VOUT + 2V) VOUT 33V CONDITIONS MAX6035A (0.2%) MAX6035B (0.5%) MAX6035A MAX6035B MAX6035A MAX6035B MAX6035A MAX6035B TA = +25C TA = -40C to +125C 7.5 8 MIN 4.9900 4.9750 TYP 5.0000 5.0000 MAX 5.0100 5.0250 20 50 25 65 30 75 25 40 V/V ppm/C UNITS V
4
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High-Supply-Voltage, Precision Voltage Reference in SOT23
ELECTRICAL CHARACTERISTICS--MAX6035_AUR50 (5.0V) (continued)
(VIN = 5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 2)
PARAMETER SYMBOL CONDITIONS Sourcing: 0 IOUT 10mA Sinking: -2mA IOUT 0mA Sourcing: 0 IOUT 10mA Sinking: -2mA IOUT 0mA 27 -4 1.9 2.25 135 160 MIN TYP 50 90 MAX 135 215 V/mA 160 300 mA V ppm ppm/ 1000hr VP-P VRMS dB s 5 F UNITS
MAX6035
TA = +25C Load Regulation (Note 4) VOUT/ IOUT TA = -40C to +125C
OUT Short-Circuit Current Dropout Voltage (Note 7) Thermal Hysteresis (Note 5) Long-Term Stability
ISC VIN - VOUT VOUT/cycle
Shorted to GND Shorted to IN IOUT = 10A IOUT = 10mA
VOUT/time 1000hr at +25C
DYNAMIC CHARACTERISTICS Output Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability (Note 6) INPUT CHARACTERISTICS Supply Voltage Range Quiescent Current Supply Change in Supply Current VIN IIN IIN/VIN 6.9V VIN 33V Inferred by line regulation and dropout voltage 6.9 80 0.4 33 100 0.7 V A A/V en f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value COUT = 50pF COUT = 1F 0 68 48 72 140 300
VOUT/VIN VIN = 15V 100mV, f = 120Hz tR COUT
Note 2: All devices are 100% production tested at TA = +25C 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 = +25C 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.
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High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
Typical Operating Characteristics
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25C, unless otherwise noted.)
MAX6035AAUR25 OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6035 toc01
MAX6035AAUR30 OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6035 toc02
MAX6035AAUR50 OUTPUT VOLTAGE TEMPERATURE DRIFT
5.004 OUTPUT VOLTAGE (V) 5.003 5.002 5.001 5.000 4.999 THREE TYPICAL PARTS
MAX6035 toc03
2.5035 2.5030 2.5025 OUTPUT VOLTAGE (V) 2.5020 2.5015 2.5010 2.5005 2.5000 2.4995 2.4990 -40 -15 10 35 60 85 110 TEMPERATURE (C) THREE TYPICAL PARTS
3.003 THREE TYPICAL PARTS 3.001 OUTPUT VOLTAGE (V)
5.005
2.999
2.997
2.995 4.998 2.993 -40 -15 10 35 60 85 110 TEMPERATURE (C) 4.997 -40 -15 10 35 60 85 110 TEMPERATURE (C)
MAX6035 LINE REGULATION (VOUT = 2.5V)
MAX6035 toc04
MAX6035 LINE REGULATION (VOUT = 3V)
TA = +125C TA = +85C TA = +25C
MAX6035 toc05
MAX6035 LINE REGULATION (VOUT = 5V)
TA = +125C 4.9990 OUTPUT VOLTAGE (V) TA = +85C 4.9985 TA = +25C 4.9980 TA = -40C 4.9975
MAX6035 toc06
2.5010 2.5005 OUTPUT VOLTAGE (V) 2.5000 TA = +85C 2.4995 2.4990 2.4985 2.4980 2.4975 2.4970 4 10 16 22 28 TA = -40C TA = +25C TA = +125C
3.0005 3.0000 2.9995 OUTPUT VOLTAGE (V) 2.9990 2.9985 2.9980 2.9975 2.9970 2.9965 2.9960
4.9995
TA = -40C
4.9970 4 10 16 22 28 34 6 10 14 18 22 26 30 34 INPUT VOLTAGE (V) INPUT VOLTAGE (V)
34
INPUT VOLTAGE (V)
MAX6035 LOAD REGULATION (VOUT = 2.5V)
MAX6035 toc07
MAX6035 LOAD REGULATION (VOUT = 3V)
3.0000 2.9995 OUTPUT VOLTAGE (V) 2.9990 2.9985 2.9980 2.9975 2.9970 2.9965 TA = +25C TA = +125C TA = +85C
MAX6035 toc08
MAX6035 LOAD REGULATION (VOUT = 5V)
TA = +125C
MAX6035 toc09
2.5010 2.5005 2.5000 OUTPUT VOLTAGE (V) 2.4995 2.4990 2.4985 2.4980 2.4975 2.4970 2.4965 -2 0 2 4 6 TA = -40C 8 TA = +25C TA = +85C TA = +125C
3.0005
5.001 5.000 OUTPUT VOLTAGE (V) 4.999 4.998 4.997 TA = +25C 4.996 4.995 TA = +85C
2.9960 2.9955 10 -2 0 2 4 6
TA = -40C 8 10
TA = -40C 4.994 -2 0 2 4 6 8 10 LOAD CURRENT (mA)
LOAD CURRENT (mA)
LOAD CURRENT (mA)
6
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High-Supply-Voltage, Precision Voltage Reference in SOT23
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25C, unless otherwise noted.)
MAX6035 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.5V)
MAX6035 toc10
MAX6035
MAX6035 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 3V)
MAX6035 toc11
MAX6035 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 5V)
MAX6035 toc12
0 -20 -40 PSRR (dB)
0 -20 -40 PSRR (dB) -60 -80 -100 -120
0 -20 -40 PSRR (dB) -60 -80 -100 -120
-60 -80 -100 -120 0.001 0.1 10 1000 FREQUENCY (kHz)
0.001
0.1
10
1000
0.001
0.1
10
1000
FREQUENCY (kHz)
FREQUENCY (kHz)
MAX6035 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 2.5V)
MAX6035 toc13
MAX6035 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 3V)
MAX6035 toc14
MAX6035 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 5V)
MAX6035 toc15
95 90 SUPPLY CURRENT (A) 85 80 75 70 65 4 10 16 22 28 TA = +125C TA = +25C TA = -40C
95
95
90 SUPPLY CURRENT (A) TA = -40C 85 TA = +25C
90 SUPPLY CURRENT (A) TA = -40C TA = +25C 80
85
80
75
TA = +125C
75
TA = +125C
70 34 4 10 16 22 28 34 INPUT VOLTAGE (V) INPUT VOLTAGE (V)
70 6 12 18 24 30 INPUT VOLTAGE (V)
MAX6035 OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 2.5V)
MAX6035 toc16
MAX6035 OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 3V)
MAX6035 toc17
MAX6035 OUTPUT IMPEDANCE vs. FREQUENCY (VOUT = 5V)
MAX6035 toc18
400
400
300 250 OUTPUT IMPEDANCE () 200 150 100 50
OUTPUT IMPEDANCE ()
200
OUTPUT IMPEDANCE ()
300
300
200
100
100
0 0.01 0.1 1 10 100 1000 FREQUENCY (kHz)
0 0.001 0.1 10 1000 FREQUENCY (kHz)
0 0.01 0.1 1 10 100 1000 FREQUENCY (kHz)
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High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25C, unless otherwise noted.)
MAX6035 0.1Hz to 10Hz OUTPUT NOISE (VOUT = 3V)
MAX6035 toc20
MAX6035 0.1Hz to 10Hz OUTPUT NOISE (VOUT = 2.5V)
MAX6035 toc19
MAX6035 0.1Hz to 10Hz OUTPUT NOISE (VOUT = 5V)
MAX6035 toc21
10V/div
10V/div
20V/div
1s/div
1s/div
1s/div
MAX6035 10Hz to 1kHz OUTPUT NOISE (VOUT = 2.5V)
MAX6035 toc22
MAX6035 10Hz to 1kHz OUTPUT NOISE (VOUT = 3V)
MAX6035 toc23
MAX6035 10Hz to 1kHz OUTPUT NOISE (VOUT = 5V)
MAX6035 toc24
50V/div
50V/div
100V/div
100ms/div
100ms/div
100ms/div
MAX6035 TURN-ON TRANSIENT (VOUT = 2.5V)
MAX6035 toc25
MAX6035 TURN-ON TRANSIENT (VOUT = 3V)
MAX6035 toc26
MAX6035 TURN-ON TRANSIENT (VOUT = 5V)
MAX6035 toc27
CL = 50pF VIN 5V/div 0V VIN 5V/div 0V
CL = 50pF VIN 10V/div
CL = 50pF
VOUT 1V/div 0V
VOUT 1V/div 0V
VOUT 2V/div
10s/div
10s/div
40s/div
8
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High-Supply-Voltage, Precision Voltage Reference in SOT23
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25C, unless otherwise noted.)
MAX6035 LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc28
MAX6035
MAX6035 LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc29
MAX6035 LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc30
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 200mV/div
VOUT AC-COUPLED 100mV/div
VL 10V/div 40s/div (IOUT = 250A, CL = 0, RL = 10k) (Figure 1)
VL 10V/div 20s/div (IOUT = 250A, CL = 0, RL = 12k) (Figure 1)
VL 10V/div 20s/div (IOUT = 250A, CL = 0, RL = 20k) (Figure 1)
MAX6035 LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc31
MAX6035 LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc32
MAX6035 LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc33
VOUT AC-COUPLED 20mV/div
VOUT AC-COUPLED 20mV/div
VOUT AC-COUPLED 20mV/div
VL 5V/div 100s/div (IOUT = 250A, CL = 1F, RL = 10k) (Figure 1)
VL 10V/div 100s/div (IOUT = 250A, CL = 1F, RL = 12k) (Figure 1)
VL 10V/div 100s/div (IOUT = 250A, CL = 1F, RL = 20k) (Figure 1)
MAX6035 LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc34
MAX6035 LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc35
MAX6035 LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc36
VOUT AC-COUPLED 500mV/div
VOUT AC-COUPLED 500mV/div
VOUT AC-COUPLED 500mV/div
VL 5V/div 10s/div (IOUT = 2mA, CL = 0, RL = 1.25k) (Figure 1)
VL 5V/div 40s/div (IOUT = 2mA, CL = 0, RL = 1.5k) (Figure 1)
VL 10V/div 20s/div (IOUT = 2mA, CL = 0, RL = 2.5k) (Figure 1)
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High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25C, unless otherwise noted.)
MAX6035 LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc37
MAX6035 LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc38
MAX6035 LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc39
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 20mV/div
VL 5V/div 40s/div (IOUT = 2mA, CL = 1F, RL = 1.25k) (Figure 1)
VL 10V/div 100s/div (IOUT = 2mA, CL = 1F, RL = 1.5k) (Figure 1)
VL 10V/div 200s/div (IOUT = 2mA, CL = 1F, RL = 2.5k) (Figure 1)
MAX6035 LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc40
MAX6035 LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc41
MAX6035 LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc42
VOUT AC-COUPLED 500mV/div
VOUT AC-COUPLED 500mV/div
VOUT AC-COUPLED 20mV/div
VL 5V/div 20s/div (IOUT = 0 to 10mA, CL = 0, RL = 250) (Figure 2)
VL 5V/div 20s/div (IOUT = 0 to 10mA, CL = 0, RL = 300) (Figure 2)
VL 5V/div 200s/div (IOUT = 0 to 10mA, CL = 0, RL = 500) (Figure 2)
10
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High-Supply-Voltage, Precision Voltage Reference in SOT23
Typical Operating Characteristics (continued)
(VIN = 5V for MAX6035AAUR25/MAX6035AAUR30, VIN = 15V for MAX6035AAUR50, IOUT = 0, TA = +25C, unless otherwise noted.)
MAX6035 LOAD TRANSIENT (VOUT = 2.5V)
MAX6035 toc43
MAX6035
MAX6035 LOAD TRANSIENT (VOUT = 3V)
MAX6035 toc44
MAX6035 LOAD TRANSIENT (VOUT = 5V)
MAX6035 toc45
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 100mV/div
VL 5V/div
VL 5V/div 100s/div (IOUT = 0 to 10mA, CL = 1F, RL = 250) (Figure 2) 100s/div (IOUT = 0 to 10mA, CL = 1F, RL = 300) (Figure 2)
VL 5V/div 100s/div (IOUT = 0 to 10mA, CL = 1F, RL = 500) (Figure 2)
MAX6035 LINE TRANSIENT (VOUT = 2.5V)
MAX6035 toc46
MAX6035 LINE TRANSIENT (VOUT = 3V)
MAX6035 toc47
MAX6035 LINE TRANSIENT (VOUT = 5V)
MAX6035 toc48
CL = 0 VIN 500mV/div VIN 500mV/div VOUT AC-COUPLED 100mV/div
CL = 0 VIN 500mV/div
CL = 0
VOUT AC-COUPLED 100mV/div
VOUT AC-COUPLED 100mV/div
4s/div
10s/div
4s/div
+VIN
+VIN
MAX6035
VOUT VOUT CL RL 2VOUT 0V
MAX6035
VOUT VOUT CL RL VOUT 0V
VL
VL
Figure 1. Load-Transient Test Circuit
Figure 2. Load-Transient Test Circuit
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11
High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
Pin Description
PIN 1 2 3 NAME IN OUT GND FUNCTION Input Voltage Reference Output 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 0.1F 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.
Thermal hysteresis is the change of output voltage at TA = +25C 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 240s. Increased output capacitance also increases turn-on time.
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 0.1F 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.
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.
Supply Current
The quiescent supply current of the MAX6035 seriesmode family is typically 73A and is virtually independent of the supply voltage, with only a 0.7A/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-
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High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/C) 8 BIT 10 1 0.1 0.01 1 10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (C) 10 BIT 12 BIT 14 BIT 16 BIT 18 BIT 20 BIT 100
Figure 3. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error
Chip Information
TRANSISTOR COUNT: 84 PROCESS: BiCMOS
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High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035
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
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 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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