Ultra-Low-Power Series Voltage Reference MAX6129 micropower, low-
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Ultra-Low-Power Series Voltage Reference
MAX6129 micropower, low-dropout bandgap voltage reference combines ultra-low supply current drift miniature 5-pin SOT23 surface-mount package that uses less board space than comparable devices package. This series-mode voltage reference sources sinks load current. wide 2.5V 12.6V supply range, ultra-low 5.25µA (max) supply current, 200mV dropout voltage make these devices ideal battery-operated systems. initial accuracy 0.4% 40ppm/°C (max) temperature coefficient make MAX6129 suitable precision applications. Additionally, internal compensation capacitor eliminates need external compensation capacitor ensures stability with load capacitances 10µF. MAX6129 provides output voltages 2.048V, 2.5V, 3.3V, 4.096V, MAX6129 available 5-pin SOT23 package specified over extended temperature range (-40°C +85°C). Output Source Current Output Sink Current ±0.4% (max) Initial Accuracy 40ppm/°C (max) Temperature Coefficient 2.5V 12.6V Supply Range 200mV Dropout Stable with Capacitive Loads 10µF External Capacitors Required Miniature 5-Pin SOT23 Package
Features
Ultra-Low 5.25µA (max) Supply Current
MAX6129
Ordering Information
PART TEMP RANGE OUTPUT PINVOLTAGE PACKAGE 2.048 2.500 3.000 3.300 4.096 5.000
Applications
Battery-Powered Systems Hand-Held Instruments Precision Power Supplies Converters
MAX6129_EUK21-T -40°C +85°C SOT23-5 MAX6129_EUK25-T -40°C +85°C SOT23-5 MAX6129_EUK30-T -40°C +85°C SOT23-5 MAX6129_EUK33-T -40°C +85°C SOT23-5 MAX6129_EUK41-T -40°C +85°C SOT23-5 MAX6129_EUK50-T -40°C +85°C SOT23-5
Note: MAX6129 available grades. Choose desired grade from Selector Guide insert suffix blank above complete part number. Selector Guide appears data sheet.
Typical Operating Circuit
2.5V 12.6V
Configuration
VIEW
MAX6129
MAX6129
N.C.
N.C.
SOT23
*CAPACITOR OPTIONAL
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
Ultra-Low-Power Series Voltage Reference MAX6129
ABSOLUTE MAXIMUM RATINGS
.-0.3V +13V .-0.3V lower (VIN 0.3V) Output Short-Circuit Duration.Continuous Continuous Power Dissipation +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C).571mW Operating Temperature Range .-40°C +85°C Storage Temperature Range .-65°C +150°C Lead Temperature (soldering, 10s) .+300°C
Stresses beyond those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only, functional operation device these other conditions beyond those indicated operational sections specifications implied. Exposure absolute maximum rating conditions extended periods affect device reliability.
ELECTRICAL CHARACTERISTICS-MAX6129_21 (VOUT 2.048V)
(VIN 2.5V, IOUT TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient (Notes 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 Supply Current IIN/VIN 2.5V 12.6V 12.6 5.25 µA/V eOUT 0.1Hz 10Hz 10Hz 1kHz VOUT 0.1% final value µVP-P µVRMS VOUT TCVOUT +25°C MAX6129A MAX6129B 0.22 (Note IOUT IOUT -1mA MAX6129A (±0.4%) MAX6129B (±1%) 2.0398 2.0275 2.0480 2.0480 2.0562 2.0685 ppm/°C µV/V µV/µA SYMBOL CONDITIONS UNITS
VOUT/VIN 2.5V 12.6V VOUT/ IOUT VOUT/time 1000 hours +25°C
VOUT/VIN 2.5V ±200mV, 120Hz
Ultra-Low-Power Series Voltage Reference
ELECTRICAL CHARACTERISTICS-MAX6129_25 (VOUT 2.500V)
(VIN 2.7V, IOUT TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient (Notes Line Regulation Load Regulation Dropout Voltage (Note 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 Supply Current IIN/VIN 2.7V 12.6V 12.6 5.75 µA/V eOUT VOUT/VIN 0.1Hz 10Hz 10Hz 1kHz 2.7V ±200mV, 120Hz VOUT 0.1% final value µVP-P µVRMS VOUT TCVOUT VOUT/VIN VOUT/IOUT VOUT VOUT/time 1000 hours +25°C (Note +25°C MAX6129A MAX6129B 2.7V 12.6V IOUT IOUT -1mA IOUT IOUT MAX6129A (±0.4%) MAX6129B (±1%) 2.4900 2.4750 2.5000 2.5000 2.5100 2.5250 ppm/°C µV/V µV/µA SYMBOL CONDITIONS UNITS
MAX6129
Ultra-Low-Power Series Voltage Reference MAX6129
ELECTRICAL CHARACTERISTICS-MAX6129_30 (VOUT 3.000V)
(VIN 3.2V, IOUT TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient (Notes Line Regulation Load Regulation Dropout Voltage (Note 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 Supply Current IIN/VIN 3.2V 12.6V 12.6 6.75 µA/V eOUT 0.1Hz 10Hz 10Hz 1kHz VOUT 0.1% final value µVP-P µVRMS VOUT TCVOUT +25°C MAX6129A MAX6129B IOUT IOUT -1mA IOUT IOUT (Note MAX6129A (±0.4%) MAX6129B (±1%) 2.9880 2.9700 3.0000 3.0000 3.0120 3.0300 ppm/°C µV/V µV/µA SYMBOL CONDITIONS UNITS
VOUT/VIN 3.2V 12.6V VOUT/ IOUT VOUT VOUT/time 1000 hours +25°C
VOUT/VIN 3.2V ±200mV, 120Hz
Ultra-Low-Power Series Voltage Reference
ELECTRICAL CHARACTERISTICS-MAX6129_33 (VOUT 3.300V)
(VIN 3.5V, IOUT TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient (Notes Line Regulation Load Regulation Dropout Voltage (Note 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 Supply Current IIN/VIN 3.5V 12.6V 12.6 7.25 µA/V eOUT VOUT/VIN 0.1Hz 10Hz 10Hz 1kHz 3.5V ±200mV, 120Hz VOUT 0.1% final value µVP-P µVRMS VOUT TCVOUT VOUT/VIN VOUT/IOUT VOUT VOUT/time 1000 hours +25°C (Note +25°C MAX6129A MAX6129B 3.5V 12.6V IOUT IOUT -1mA IOUT IOUT MAX6129A (±0.4%) MAX6129B (±1%) 3.2868 3.2670 3.3000 3.3000 3.3132 3.3330 ppm/°C µV/V µV/µA SYMBOL CONDITIONS UNITS
MAX6129
Ultra-Low-Power Series Voltage Reference MAX6129
ELECTRICAL CHARACTERISTICS-MAX6129_41 (VOUT 4.096V)
(VIN 4.3V, IOUT TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient (Notes Line Regulation Load Regulation Dropout Voltage (Note 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 Supply Current IIN/VIN 4.3V 12.6V 12.6 8.75 µA/V eOUT VOUT/VIN 0.1Hz 10Hz 10Hz 1kHz 4.3V ±200mV, 120Hz VOUT 0.1% final value µVP-P µVRMS VOUT TCVOUT VOUT/VIN VOUT/IOUT VOUT VOUT/time 1000 hours +25°C (Note +25°C MAX6129A MAX6129B 4.3V 12.6V IOUT IOUT -1mA IOUT IOUT MAX6129A (±0.4%) MAX6129B (±1%) 4.0796 4.0550 4.0960 4.0960 4.1124 4.1370 ppm/°C µV/V µV/µA SYMBOL CONDITIONS UNITS
Ultra-Low-Power Series Voltage Reference
ELECTRICAL CHARACTERISTICS-MAX6129_50 (VOUT 5.000V)
(VIN 5.2V, IOUT TMIN TMAX, unless otherwise noted. Typical values +25°C.) (Note
PARAMETER OUTPUT Output Voltage Output Voltage Temperature Coefficient (Notes Line Regulation Load Regulation Dropout Voltage (Note 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 Supply Current IIN/VIN 5.2V 12.6V 12.6 10.5 µA/V eOUT 0.1Hz 10Hz 10Hz 1kHz VOUT 0.1% final value µVP-P µVRMS VOUT TCVOUT +25°C MAX6129A MAX6129B IOUT IOUT -1mA IOUT IOUT (Note MAX6129A (±0.4%) MAX6129B (±1%) 4.9800 4.9500 5.0000 5.0000 5.0200 5.0500 ppm/°C µV/V µV/µA SYMBOL CONDITIONS UNITS
MAX6129
VOUT/VIN 5.2V 12.6V VOUT/ IOUT VOUT VOUT/time 1000 hours +25°C
VOUT/VIN 5.2V ±200mV, 120Hz
Note Note Note Note
MAX6129 100% production tested +25°C guaranteed design TMIN TMAX specified. Temperature coefficient defined method: (VMAX VMIN)/(T V+25°C). production tested. Guaranteed design. Thermal hysteresis defined change +25°C output voltage before after temperature cycling device (from TMIN TMAX). Initial measurement +25°C followed temperature cycling device +85°C then -40°C another measurement +25°C compared original measurement +25°C. Note Dropout voltage minimum input voltage which VOUT changes 0.1% from VOUT rated guaranteed Load Regulation Test.
Ultra-Low-Power Series Voltage Reference MAX6129
Typical Operating Characteristics
(VIN 2.5V MAX_EUK21, 3.2V MAX_EUK30, 5.2V MAX_EUK50, IOUT +25°C, unless otherwise noted.)
OUTPUT VOLTAGE TEMPERATURE (VOUT 2.048V)
MAX6129 toc01
OUTPUT VOLTAGE TEMPERATURE (VOUT
MAX6129 toc02
OUTPUT VOLTAGE TEMPERATURE (VOUT
TYPICAL UNITS 5.004 5.002 OUTPUT VOLTAGE 5.000 4.998 4.996 4.994 4.992
MAX6129 toc03
2.050
TYPICAL UNITS
3.003 3.001 OUTPUT VOLTAGE 2.999 2.997 2.995 2.993
TYPICAL UNITS
5.006
2.048 OUTPUT VOLTAGE
2.046
2.044
2.042
4.990 2.040 TEMPERATURE (°C) 2.991 TEMPERATURE (°C) 4.988 TEMPERATURE (°C)
SUPPLY CURRENT INPUT VOLTAGE
MAX6129 toc04
SUPPLY CURRENT TEMPERATURE
SUPPLY CURRENT (µA) VOUT 2.048V VOUT VOUT
MAX6129 toc05
DROPOUT VOLTAGE SOURCE CURRENT (VOUT 2.048V)
0.14 DROPOUT VOLTAGE 0.12 0.10 0.08 0.06 0.04 0.02
MAX6129 toc06
SUPPLY CURRENT (µA) VOUT VOUT VOUT 2.048V
0.16
INPUT VOLTAGE
TEMPERATURE (°C)
SOURCE CURRENT (mA)
DROPOUT VOLTAGE SOURCE CURRENT (VOUT
MAX6129 toc07
DROPOUT VOLTAGE SOURCE CURRENT (VOUT
MAX6129 toc08
LOAD REGULATION (VOUT 2.048V)
2.0515 2.0510 OUTPUT VOLTAGE 2.0505 2.0500 2.0495 2.0490 2.0485 2.0480 2.0475 2.0470
MAX6129 toc09
0.11 0.10 0.09 DROPOUT VOLTAGE 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 SOURCE CURRENT (mA)
0.09 0.08 DROPOUT VOLTAGE 0.07 0.06 0.05 0.04 0.03 0.02 0.01 SOURCE CURRENT (mA)
2.0520
OUTPUT CURRENT (mA)
Ultra-Low-Power Series Voltage Reference
Typical Operating Characteristics (continued)
(VIN 2.5V MAX_EUK21, 3.2V MAX_EUK30, 5.2V MAX_EUK50, IOUT +25°C, unless otherwise noted.)
LINE REGULATION (VOUT 2.048V)
MAX6129 toc10
MAX6129
LOAD REGULATION (VOUT
3.0050 3.0045 OUTPUT VOLTAGE 3.0040 3.0035 3.0030 3.0025 3.0020 3.0015 3.0010 3.00155
MAX6129 toc11
LINE REGULATION (VOUT
MAX6129 toc12
2.04792 2.04790 2.04788 OUTPUT VOLTAGE 2.04786 2.04784 2.04782 2.04780 2.04778 2.04776 2.04774 2.04772 10.0 11.5
3.0055
3.00180
3.00175 OUTPUT VOLTAGE
3.00170
3.00165
3.00160
13.0
INPUT VOLTAGE
OUTPUT CURRENT (mA)
INPUT VOLTAGE
LOAD REGULATION (VOUT
MAX6129 toc13
LINE REGULATION (VOUT
MAX6129 toc14
POWER-SUPPLY REJECTION RATIO FREQUENCY (VOUT 2.048V)
MAX6129 toc15
5.0050 5.0045 5.0040 OUTPUT VOLTAGE 5.0035 5.0030 5.0025 5.0020 5.0015 5.0010 5.0005 OUTPUT CURRENT (mA)
5.00080 5.00078 OUTPUT VOLTAGE 5.00076
PSRR (dB)
5.00074 5.00072 5.00070 5.00068 5.00066 5.00064 INPUT VOLTAGE
FREQUENCY (kHz)
1000
POWER-SUPPLY REJECTION RATIO FREQUENCY (VOUT
MAX6129 toc16
POWER-SUPPLY REJECTION RATIO FREQUENCY (VOUT
MAX6129 toc17
LINE-TRANSIENT RESPONSE (VOUT 2.048V)
MAX6129 toc18
PSRR (dB) FREQUENCY (kHz)
PSRR (dB)
200mV/div AC-COUPLED
2.5V
2.048V
VOUT 200mV/div AC-COUPLED 200µs/div
1000
FREQUENCY (kHz)
1000
Ultra-Low-Power Series Voltage Reference MAX6129
Typical Operating Characteristics (continued)
(VIN 2.5V MAX_EUK21, 3.2V MAX_EUK30, 5.2V MAX_EUK50, IOUT +25°C, unless otherwise noted.)
LINE-TRANSIENT RESPONSE (VOUT
MAX6129 toc19
LINE-TRANSIENT RESPONSE (VOUT
MAX6129 toc20
3.7V
200mV/div AC-COUPLED
5.7V
200mV/div AC-COUPLED
3.2V
5.2V
VOUT 200mV/div AC-COUPLED 200µs/div 200µs/div
VOUT 100mV/div AC-COUPLED
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT 2.048V)
MAX6129 toc21
LOAD-TRANSIENT RESPONSE (SINKING, VOUT 2.048V)
MAX6129 toc22
COUT -1mA
COUT IOUT 2mA/div
IOUT 10mA/div
2.048V
VOUT 500mV/div AC-COUPLED
2.048V
VOUT 500mV/div AC-COUPLED
100µs/div
1ms/div
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT 2.048V)
MAX6129 toc23
LOAD-TRANSIENT RESPONSE (SINKING, VOUT 2.048V)
MAX6129 toc24
COUT IOUT 10mA/div -1mA
COUT
IOUT 2mA/div
2.048V
VOUT 500mV/div AC-COUPLED
2.048V
VOUT 500mV/div AC-COUPLED
400µs/div
1ms/div
Ultra-Low-Power Series Voltage Reference
Typical Operating Characteristics (continued)
(VIN 2.5V MAX_EUK21, 3.2V MAX_EUK30, 5.2V MAX_EUK50, IOUT +25°C, unless otherwise noted.)
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT
MAX6129 toc25
MAX6129
LOAD-TRANSIENT RESPONSE (SINKING, VOUT
MAX6129 toc26
COUT IOUT 10mA/div -1mA
COUT
IOUT 1mA/div
VOUT 500mV/div AC-COUPLED
VOUT 1V/div AC-COUPLED
400µs/div
2ms/div
LOAD-TRANSIENT RESPONSE (SOURCING, VOUT
MAX6129 toc27
LOAD-TRANSIENT RESPONSE (SINKING, VOUT
MAX6129 toc28
COUT IOUT 10mA/div
COUT
-1mA
IOUT 1mA/div
VOUT 200mV/div AC-COUPLED
VOUT 1V/div AC-COUPLED
400µs/div
2ms/div
TURN-ON TRANSIENT (VOUT 2.048V)
MAX6129 toc29
TURN-ON TRANSIENT (VOUT
MAX6129 toc30
2.5V
1V/div
3.2V
2V/div
2.048V VOUT 1V/div 200µs/div 200µs/div VOUT 1V/div
Ultra-Low-Power Series Voltage Reference MAX6129
Typical Operating Characteristics (continued)
(VIN 2.5V MAX_EUK21, 3.2V MAX_EUK30, 5.2V MAX_EUK50, IOUT +25°C, unless otherwise noted.)
TURN-ON TRANSIENT (VOUT
MAX6129 toc31
0.1Hz 10Hz OUTPUT NOISE (VOUT 2.048V)
MAX6129 toc32
0.1Hz 10Hz OUTPUT NOISE (VOUT
MAX6129 toc33
5.2V 2V/div VOUT 10µV/div VOUT 2V/div VOUT 10µV/div
400µs/div
1s/div
1s/div
0.1Hz 10Hz OUTPUT NOISE (VOUT
MAX6129 toc34
NOISE FREQUENCY (VOUT 2.048V)
MAX6129 toc35
NOISE FREQUENCY (VOUT
FREQUENCY (kHz)
MAX6129 toc36
NOISE (µVRMS/Hz)
VOUT 20µV/div
1s/div
NOISE (µVRMS/Hz)
FREQUENCY (kHz)
NOISE FREQUENCY (VOUT
NOISE (µVRMS/Hz) FREQUENCY (kHz)
MAX6129 toc37
Ultra-Low-Power Series Voltage Reference
Description
NAME N.C. Ground Internally connected. Leave unconnected connect ground. Reference Output FUNCTION Positive Voltage Supply
Supply Current
quiescent supply current series-mode MAX6129 very small, 5.25µA (max), very stable against changes supply voltage with only 1.5µA/V (max) variation with supply voltage. MAX6129 family draws load current from input voltage source only when required, supply current wasted efficiency maximized input voltages. This improved efficiency reduces power dissipation extends battery life.
MAX6129
Applications Information
Input Bypassing
MAX6129 does require input bypass capacitor. improved transient performance, bypass input ground with 0.1µF ceramic capacitor. Place capacitor close possible.
Output Thermal Hysteresis
Output thermal hysteresis change output voltage +25°C before after device cycled over entire operating temperature range. Hysteresis caused differential package stress appearing across device.
Load Capacitance
MAX6129 does require output capacitor stability. MAX6129 stable driving capacitive loads from 100pF 0.1µF 10µF when sourcing current from 0.4µF when sinking current. applications where load supply experience step changes, output capacitor reduces amount overshoot (undershoot) improves circuit's transient response. Many applications require external capacitor, MAX6129 offers significant advantage applications where board space critical.
Temperature Coefficient Operating Temperature Range 1LSB Maximum Error
data converter application, reference voltage converter must stay within certain limit keep error data converter smaller than resolution limit through operating temperature range. Figure shows maximum allowable reference voltage temperature coefficient keep conversion error less than 1LSB, function operating temperature range (TMAX TMIN) with converter resolution parameter. graph assumes reference-voltage temperature coefficient only parameter affecting accuracy.
10,000 1000 TEMPERATURE COEFFICIENT (ppm/°C) 0.01 OPERATING TEMPERATURE RANGE (TMAX TMIN) (°C)
Figure Temperature Coefficient Operating Temperature Range 1LSB Maximum Error
Ultra-Low-Power Series Voltage Reference MAX6129
MAX681 VMAX6129 2VIN -REF OUTPUT +REF OUTPUT
-2VIN
10nF
MAX480
Figure Positive Negative References from Single 3V/5V Supply
Selector Guide
PART MAX6129AEUK21 MAX6129BEUK21 MAX6129AEUK25* MAX6129BEUK25 MAX6129AEUK30 MAX6129BEUK30 MAX6129AEUK33 MAX6129BEUK33 MAX6129AEUK41 MAX6129BEUK41 MAX6129AEUK50 MAX6129BEUK50 OUTPUT VOLTAGE 2.048 2.048 2.500 2.500 3.000 3.000 3.300 3.300 4.096 4.096 5.000 5.000 INITIAL ACCURACY TEMPERATURE COEFFICIENT (ppm/°C) MARK ADRM ADRN ADRO ADRP ADRQ ADRR ADRW ADRX ADRS ADRT ADRU ADRV
*Future product-contact factory availability.
reality, absolute static accuracy data converter dependent combination many parameters such integral nonlinearity, differential nonlinearity, offset error, gain error, well voltage reference changes.
Positive Negative Low-Power Voltage Reference
Figure shows typical method developing bipolar reference. circuit uses MAX681 voltage doubler/inverter charge-pump converter power MAX480, creating positive well negative reference voltage.
Turn-On Time
These devices typically turn settle within 0.1% their final value less than 1.4ms. turn-on time increases when heavily loaded operating close dropout.
Chip Information
TRANSISTOR COUNT: PROCESS: BiCMOS
Ultra-Low-Power Series Voltage Reference
Package Information
(The package drawing(s) this data sheet reflect most current specifications. latest package outline information, www.maxim-ic.com/packages.)
SOT5L.EPS
MAX6129
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2002 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.
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