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19-2892; Rev 0; 7/03
Ultra-Low-Power Precision Series Voltage Reference
General Description
The MAX6029 micropower, low-dropout bandgap voltage reference combines ultra-low supply current and low drift in a miniature 5-pin SOT23 surface-mount package that uses 70% less board space than comparable devices in an SO package. An initial accuracy of 0.15% and a 30ppm/C (max) temperature coefficient make the MAX6029 suitable for precision applications. This series-mode voltage reference sources up to 4mA and sinks up to 1mA of load current. A wide 2.5V to 12.6V supply range, ultra-low 5.25A (max) supply current, and a low 200mV dropout voltage make these devices ideal for battery-operated systems. Additionally, an internal compensation capacitor eliminates the need for an external compensation capacitor and ensures stability with load capacitances up to 10F. The MAX6029 provides six output voltages of 2.048V, 2.5V, 3V, 3.3V, 4.096V, and 5V. The MAX6029 is available in a 5-pin SOT23 package and is specified over the extended temperature range (-40C to +85C).
PART
Features
o Ultra-Low 5.25A (max) Supply Current o 0.15% (max) Initial Accuracy o 30ppm/C (max) Temperature Coefficient o 4mA Output Source Current o 1mA Output Sink Current o 2.5V to 12.6V Supply Range o Low 200mV Dropout o Stable with Capacitive Loads Up to 10F o No External Capacitors Required o Miniature 5-Pin SOT23 Package
MAX6029
Ordering Information
TEMP RANGE PINPACKAGE TOP MARK AEHD AEHF AEHH AEHN AEHJ AEHL
Applications
Battery-Powered Systems Hand-Held Instruments Precision Power Supplies A/D and D/A Converters
MAX6029EUK21-T MAX6029EUK25-T MAX6029EUK30-T MAX6029EUK33-T MAX6029EUK41-T MAX6029EUK50-T
-40C to +85C 5 SOT23-5 -40C to +85C 5 SOT23-5 -40C to +85C 5 SOT23-5 -40C to +85C 5 SOT23-5 -40C to +85C 5 SOT23-5 -40C to +85C 5 SOT23-5
Pin Configuration
PART
Selector Guide
PIN-PACKAGE 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 OUTPUT VOLTAGE (V) 2.048 2.500 3.000 3.300 4.096 5.000
TOP VIEW
IN 1 5 OUT
MAX6029EUK21-T MAX6029EUK25-T MAX6029EUK30-T MAX6029EUK33-T MAX6029EUK41-T MAX6029EUK50-T
4 N.C.
GND 2
MAX6029
N.C. 3
SOT23
________________________________________________________________ Maxim Integrated Products
1
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.
Ultra-Low-Power Precision Series Voltage Reference MAX6029
ABSOLUTE MAXIMUM RATINGS
IN to GND ...............................................................-0.3V to +13V OUT to GND ..............-0.3V to the lower of +6V and (VIN + 0.3V) Output to GND Short-Circuit Duration........................Continuous Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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--MAX6029_21 (VOUT = 2.048V)
(VIN = 2.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Output Short-Circuit Current Long-Term Stability Thermal Hysteresis DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current Change in Supply Current VIN IIN IIN/VIN VIN = 2.5V to 12.6V 2.5 12.6 5.25 1.5 V A A/V eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value 30 115 43 450 VP-P VRMS dB s VOUT TCVOUT TA = +25C (Notes 2, 3) 27 0.22 2.4 60 150 140 (Note 4) 2.0449 2.0480 2.0511 30 200 0.7 5.5 V ppm/C V/V V/A mA ppm ppm SYMBOL CONDITIONS MIN TYP MAX UNITS
VOUT/VIN VIN = 2.5V to 12.6V VOUT/ IOUT ISC VOUT/time 1000 hours at +25C IOUT = 0 to 4mA IOUT = 0 to -1mA
VOUT/VIN VIN = 2.5V 200mV, f = 120Hz tR
2
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Ultra-Low-Power Precision Series Voltage Reference
ELECTRICAL CHARACTERISTICS--MAX6029_25 (VOUT = 2.500V)
(VIN = 2.7V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current Long-Term Stability Thermal Hysteresis DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current Change in Supply Current VIN IIN IIN/VIN VIN = 2.7V to 12.6V 2.7 12.6 5.75 1.5 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 1kHz VIN = 2.7V 200mV, f = 120Hz To VOUT = 0.1% of final value 39 137 34 700 VP-P VRMS dB ms VOUT TCVOUT VOUT/VIN VOUT/IOUT VIN - VOUT ISC VOUT/time 1000 hours at +25C (Note 4) TA = +25C (Notes 2, 3) VIN = 2.7V to 12.6V IOUT = 0 to 4mA IOUT = 0 to -1mA IOUT = 0 IOUT = 4mA 60 150 140 30 0.1 2.5 2.4963 2.5000 2.5038 30 230 0.6 6.2 100 200 V ppm/C V/V V/A mV mA ppm ppm SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6029
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3
Ultra-Low-Power Precision Series Voltage Reference MAX6029
ELECTRICAL CHARACTERISTICS--MAX6029_30 (VOUT = 3.000V)
(VIN = 3.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current Long-Term Stability Thermal Hysteresis DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current Change in Supply Current VIN IIN IIN/VIN VIN = 3.2V to 12.6V 3.2 12.6 6.75 1.5 V A A/V eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz 39 161 37 775 VP-P VRMS dB s VOUT TCVOUT TA = +25C (Notes 2, 3) 15 0.1 2.4 2.9955 3.0000 3.0045 30 250 0.6 6.5 100 200 60 150 140 (Note 4) V ppm/C V/V V/A mV mA ppm ppm SYMBOL CONDITIONS MIN TYP MAX UNITS
VOUT/VIN VIN = 3.2V to 12.6V VOUT/ IOUT VIN - VOUT ISC VOUT/time 1000 hours at +25C IOUT = 0 to 4mA IOUT = 0 to -1mA IOUT = 0 IOUT = 4mA
VOUT/VIN VIN = 3.2V 200mV, f = 120Hz tR To VOUT = 0.1% of final value
4
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Ultra-Low-Power Precision Series Voltage Reference
ELECTRICAL CHARACTERISTICS--MAX6029_33 (VOUT = 3.300V)
(VIN = 3.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current Long-Term Stability Thermal Hysteresis DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current Change in Supply Current VIN IIN IIN/VIN VIN = 3.5V to 12.6V 3.5 12.6 7.25 1.5 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 1kHz VIN = 3.5V 200mV, f = 120Hz To VOUT = 0.1% of final value 56 174 38 1 VP-P VRMS dB ms SYMBOL VOUT TCVOUT VOUT/VIN VOUT/IOUT VIN - VOUT ISC VOUT/time 1000 hours at +25C (Note 4) TA = +25C (Notes 2, 3) VIN = 3.5V to 12.6V IOUT = 0 to 4mA IOUT = 0 to -1mA IOUT = 0 IOUT = 4mA 60 150 140 30 0.1 2.4 CONDITIONS MIN 3.2951 TYP 3.3000 MAX 3.3050 30 270 0.6 7 100 200 UNITS V ppm/C V/V V/A mV mA ppm ppm
MAX6029
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5
Ultra-Low-Power Precision Series Voltage Reference MAX6029
ELECTRICAL CHARACTERISTICS--MAX6029_41 (VOUT = 4.096V)
(VIN = 4.3V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current Long-Term Stability Thermal Hysteresis DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current Change in Supply Current VIN IIN IIN/VIN VIN = 4.3V to 12.6V 4.3 12.6 8.75 1.5 V A A/V eOUT VOUT/VIN tR f = 0.1Hz to 10Hz f = 10Hz to 1kHz VIN = 4.3V 200mV, f = 120Hz To VOUT = 0.1% of final value 72 210 36 1.2 VP-P VRMS dB ms VOUT TCVOUT VOUT/VIN VOUT/IOUT VIN - VOUT ISC VOUT/time 1000 hours at +25C (Note 4) TA = +25C (Notes 2, 3) VIN = 4.3V to 12.6V IOUT = 0 to 4mA IOUT = 0 to -1mA IOUT = 0 IOUT = 4mA 60 150 140 30 0.1 2.5 4.0899 4.0960 4.1021 30 310 0.6 8.5 100 200 V ppm/C V/V V/A mV mA ppm ppm SYMBOL CONDITIONS MIN TYP MAX UNITS
6
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Ultra-Low-Power Precision Series Voltage Reference
ELECTRICAL CHARACTERISTICS--MAX6029_50 (VOUT = 5.000V)
(VIN = 5.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient Line Regulation Load Regulation Dropout Voltage (Note 5) Output Short-Circuit Current Long-Term Stability Thermal Hysteresis DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time INPUT Supply Voltage Range Supply Current Change in Supply Current VIN IIN IIN/VIN VIN = 5.2V to 12.6V 5.2 12.6 10.5 1.5 V A A/V eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value 90 245 38 1.4 VP-P VRMS dB ms VOUT TCVOUT TA = +25C (Notes 2, 3) 34 0.3 3.3 4.9925 5.0000 5.0075 30 375 0.8 9 100 200 60 150 140 (Note 4) V ppm/C V/V V/A mV mA ppm ppm SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6029
VOUT/VIN VIN = 5.2V to 12.6V IOUT = 0 to 4mA VOUT/ IOUT IOUT = 0 to -1mA VIN - VOUT ISC VOUT/time 1000 hours at +25C IOUT = 0 IOUT = 4mA
VOUT/VIN VIN = 5.2V 200mV, f = 120Hz tR
Note 1: Note 2: Note 3: Note 4:
MAX6029 is 100% production tested at TA = +25C and is guaranteed by design for TA = TMIN to TMAX as specified. Temperature coefficient is defined by box method: (VMAX - VMIN)/(T V+25C). Not production tested. Guaranteed by design. Thermal hysteresis is defined as the change in TA = +25C output voltage before and after temperature cycling of the device (from TA = TMIN to TMAX). Initial measurement at TA = +25C is followed by temperature cycling the device to TA = +85C then to TA = -40C and another measurement at TA = +25C is compared to the original measurement at TA = +25C. Note 5: Dropout voltage is the minimum input voltage at which VOUT changes by 0.1% from VOUT at rated VIN and is guaranteed by Load Regulation Test.
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Ultra-Low-Power Precision Series Voltage Reference MAX6029
Typical Operating Characteristics
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25C, unless otherwise noted.)
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.048V)
MAX6029 toc01
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 3V)
MAX6029 toc02
OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 5V)
3 TYPICAL UNITS 5.004 5.002 OUTPUT VOLTAGE (V) 5.000 4.998 4.996 4.994 4.992
MAX6029 toc03
2.050
3 TYPICAL UNITS
3.003 3.001 OUTPUT VOLTAGE (V) 2.999 2.997 2.995 2.993
3 TYPICAL UNITS
5.006
2.048 OUTPUT VOLTAGE (V)
2.046
2.044
2.042
4.990 2.040 -40 -15 10 35 60 85 TEMPERATURE (C) 2.991 -40 -15 10 35 60 85 TEMPERATURE (C) 4.988 -40 -15 10 35 60 85 TEMPERATURE (C)
SUPPLY CURRENT vs. INPUT VOLTAGE
MAX6029 toc04
SUPPLY CURRENT vs. TEMPERATURE
6.5 SUPPLY CURRENT (A) 6.0 5.5 5.0 4.5 4.0 3.5 VOUT = 2.048V VOUT = 3V VOUT = 5V
MAX6029 toc05
DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 2.048V)
0.14 DROPOUT VOLTAGE (V) 0.12 0.10 0.08 0.06 0.04 0.02 0 0 1 2 3 4 5 6 7
MAX6029 toc06
14 12 SUPPLY CURRENT (A) 10 8 6 4 2 0 VOUT = 5V VOUT = 3V VOUT = 2.048V
7.0
0.16
3.0 2.5 -40 -15 10 35 60 85
0 1 2 3 4 5 6 7 8 9 10 11 12 13 INPUT VOLTAGE (V)
TEMPERATURE (C)
SOURCE CURRENT (mA)
DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 3V)
MAX6029 toc07
DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 5V)
MAX6029 toc08
LOAD REGULATION (VOUT = 2.048V)
2.0515 2.0510 OUTPUT VOLTAGE (V) 2.0505 2.0500 2.0495 2.0490 2.0485 2.0480 2.0475 2.0470
MAX6029 toc09
0.11 0.10 0.09 DROPOUT VOLTAGE (V) 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 SOURCE CURRENT (mA)
0.09 0.08 DROPOUT VOLTAGE (V) 0.07 0.06 0.05 0.04 0.03 0.02 0.01 0 0 1 2 3 4 5 6 7 SOURCE CURRENT (mA)
2.0520
-2
-1
0
1
2
3
4
5
6
7
OUTPUT CURRENT (mA)
8
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Ultra-Low-Power Precision Series Voltage Reference
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25C, unless otherwise noted.)
LINE REGULATION (VOUT = 2.048V)
MAX6029 toc10
MAX6029
LOAD REGULATION (VOUT = 3V)
MAX6029 toc11
LINE REGULATION (VOUT = 3V)
MAX6029 toc12
2.04792 2.04790 2.04788 OUTPUT VOLTAGE (V) 2.04786 2.04784 2.04782 2.04780 2.04778 2.04776 2.04774 2.04772 2.5 4.0 5.5 7.0 8.5 10.0 11.5
3.0055 3.0050 3.0045 OUTPUT VOLTAGE (V) 3.0040 3.0035 3.0030 3.0025 3.0020 3.0015 3.0010
3.00180
3.00175 OUTPUT VOLTAGE (V)
3.00170
3.00165
3.00160
3.00155 -2 -1 0 1 2 3 4 5 6 7 3 4 5 6 7 8 9 10 11 12 13 OUTPUT CURRENT (mA) INPUT VOLTAGE (V)
13.0
INPUT VOLTAGE (V)
LOAD REGULATION (VOUT = 5V)
MAX6029 toc13
LINE REGULATION (VOUT = 5V)
MAX6029 toc14
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.048V)
MAX6029 toc15
5.0050 5.0045 5.0040 OUTPUT VOLTAGE (V) 5.0035 5.0030 5.0025 5.0020 5.0015 5.0010 5.0005 -2 -1 0 1 2 3 4 5 6 7 OUTPUT CURRENT (mA)
5.00080 5.00078 OUTPUT VOLTAGE (V) 5.00076
0 -10 -20 PSRR (dB) -30 -40 -50 -60
5.00074 5.00072 5.00070 5.00068 5.00066 5.00064 5 6 7 8 9 10 11 12 13 INPUT VOLTAGE (V)
0.1
1
10 FREQUENCY (kHz)
100
1000
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 3V)
MAX6029 toc16
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 5V)
MAX6029 toc17
LINE-TRANSIENT RESPONSE (VOUT = 2.048V)
MAX6029 toc18
0 -10 -20 PSRR (dB) -30 -40 -50 -60 0.1 1 10 FREQUENCY (kHz) 100
0 -5 -10 -15 PSRR (dB) -20 -25 -30 -35 -40 -45 -50
3V
VIN 200mV/div AC-COUPLED
2.5V
2.048V
VOUT 200mV/div AC-COUPLED 200s/div
1000
0.1
1
10 FREQUENCY (kHz)
100
1000
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9
Ultra-Low-Power Precision Series Voltage Reference MAX6029
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25C, unless otherwise noted.)
LINE-TRANSIENT RESPONSE (VOUT = 3V)
MAX6029 toc19
LINE-TRANSIENT RESPONSE (VOUT = 5V)
MAX61029 toc20
3.7V
VIN 200mV/div AC-COUPLED
5.7V
VIN 200mV/div AC-COUPLED
3.2V
5.2V
5V 3V VOUT 200mV/div AC-COUPLED 200s/div 200s/div
VOUT 100mV/div AC-COUPLED
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 2.048V)
MAX6029 toc21
LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 2.048V)
MAX6029 toc22
COUT = 0 0 -1mA
COUT = 0 IOUT 2mA/div
4mA 0
IOUT 10mA/div
2.048V
VOUT 500mV/div AC-COUPLED
2.048V
VOUT 500mV/div AC-COUPLED
100s/div
1ms/div
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 2.048V)
MAX6029 toc23
LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 2.048V)
MAX6029 toc24
COUT = 1F 4mA 0 IOUT 10mA/div
COUT = 1F 0 -1mA
IOUT 2mA/div
2.048V
VOUT 500mV/div AC-COUPLED
2.048V
VOUT 500mV/div AC-COUPLED
400s/div
1ms/div
10
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Ultra-Low-Power Precision Series Voltage Reference
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 5V)
MAX6029 toc25
MAX6029
LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 5V)
MAX6029 toc26
COUT = 0 4mA 0 IOUT 10mA/div 0 -1mA
COUT = 0
IOUT 1mA/div
5V
VOUT 500mV/div AC-COUPLED
5V
VOUT 1V/div AC-COUPLED
400s/div
2ms/div
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT = 5V)
6029 toc27
LOAD-TRANSIENT RESPONSE (SINKING, VOUT = 5V)
MAX6029 toc28
COUT = 1F 4mA 0 IOUT 10mA/div
COUT = 1F
0 -1mA
IOUT 1mA/div
6V
VOUT 200mV/div AC-COUPLED 5V
VOUT 1V/div AC-COUPLED
400s/div
2ms/div
TURN-ON TRANSIENT (VOUT = 2.048V)
MAX6029 toc29
TURN-ON TRANSIENT (VOUT = 3V)
MAX6029 toc30
2.5V
VIN 1V/div
3.2V
VIN 2V/div
0 0 2.048V VOUT 1V/div 0 200s/div 200s/div 3V VOUT 1V/div
0
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11
Ultra-Low-Power Precision Series Voltage Reference MAX6029
Typical Operating Characteristics (continued)
(VIN = 2.5V for MAX6029EUK21, VIN = 3.2V for MAX6029EUK30, and VIN = 5.2V for MAX6029EUK50, IOUT = 0, TA = +25C, unless otherwise noted.)
TURN-ON TRANSIENT (VOUT = 5V)
MAX6029 toc31
0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 2.048V)
MAX6029 toc32
0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 3V)
MAX6029 toc33
5.2V VIN 2V/div VOUT 10V/div VOUT 10V/div
0 5V VOUT 2V/div 0 1s/div
400s/div
1s/div
0.1Hz TO 10Hz OUTPUT NOISE (VOUT = 5V)
MAX6029 toc34
NOISE vs. FREQUENCY (VOUT = 2.048V)
3.5 NOISE (VRMS/Hz) 3.0 2.5 2.0 1.5 1.0 0.5 0 0 10 20 30 40 50
MAX6029 toc35
4.0
VOUT 20V/div
1s/div
FREQUENCY (kHz)
NOISE vs. FREQUENCY (VOUT = 3V)
6.5 6.0 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 0 10 20 30 40 FREQUENCY (kHz)
MAX6029 toc36
NOISE vs. FREQUENCY (VOUT = 5V)
18 16 NOISE (VRMS/Hz) 14 12 10 8 6 4 2 0 50 0 10 20 30 40 50 FREQUENCY (kHz)
MAX6029 toc37
20
12
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NOISE (VRMS/Hz)
Ultra-Low-Power Precision Series Voltage Reference
Pin Description
PIN 1 2 3, 4 5 NAME IN GND N.C. OUT Ground No Connection. Leave unconnected or connect to ground. Reference Output FUNCTION Positive Voltage Supply
age source 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.
MAX6029
Output Thermal Hysteresis
Output thermal hysteresis is the change of the output voltage at TA = +25C before and after the device is cycled over its entire operating temperature range. Hysteresis is caused by differential package stress appearing across the device.
Applications Information
Input Bypassing
The MAX6029 does not require an input bypass capacitor. For improved transient performance, bypass the input to ground with a 0.1F ceramic capacitor. Place the capacitor as close to IN as possible.
Temperature Coefficient vs. Operating Temperature Range for a 1LSB 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 1 shows the maximum allowable reference voltage temperature coefficient to keep the conversion error to less than 1 LSB, 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.
Load Capacitance
The MAX6029 does not require an output capacitor for stability. The MAX6029 is stable driving capacitive loads from 0 to 100pF and 0.1F to 10F when sourcing current and from 0 to 0.4F when sinking current. In applications where the load or the supply can experience step changes, an output capacitor reduces the amount of overshoot (undershoot) and improves the circuit's transient response. Many applications do not require an external capacitor, and the MAX6029 offers a significant advantage in applications where board space is critical.
Supply Current
The quiescent supply current of the series-mode MAX6029 is very small, 5.25A (max), and is very stable against changes in the supply voltage with only 1.5A/V (max) variation with supply voltage. The MAX6029 family draws load current from the input volt-
Turn-On Time
These devices turn on and settle to within 0.1% of their final value in less than 1ms. The turn-on time increases when heavily loaded and operating close to dropout.
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 1. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error ______________________________________________________________________________________ 13
Ultra-Low-Power Precision Series Voltage Reference MAX6029
Typical Operating Circuit
VIN = 2.5V TO 12.6V
*
Chip Information
TRANSISTOR COUNT: 30 PROCESS: BiCMOS
IN
MAX6029
OUT
GND
*CAPACITOR IS OPTIONAL.
14
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Ultra-Low-Power Precision Series Voltage Reference
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.)
MAX6029
PACKAGE OUTLINE, SOT-23, 5L
21-0057
E
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.
15 ____________________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.
SOT-23 5L .EPS

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Price & Availability of MAX6029

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