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19-3192; Rev 0; 2/04
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
General Description
The MAX6037 family of low-dropout, micropower voltage references offer fixed and adjustable output voltage options ranging from 1.184V to 5V. Connect an external resistive-divider on the MAX6037_ADJ to adjust the output voltage from 1.184V to 5V. The other devices in the MAX6037 family feature fixed output voltages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V. The MAX6037 offers shutdown functionality with an active-low shutdown (500nA, max). These series-mode voltage references operate from a 2.5V to 5.5V supply and consume 275A (max) quiescent current. The output is stable driving loads from 0.02F to 1F and can source and sink 5mA of load current. The MAX6037 offers a low temperature coefficient of 25ppm/C and initial accuracy of 0.2% (max). The low dropout voltage (100mV, max at 1mA) and supply-independent, low supply current make the MAX6037 ideal for battery-powered applications. The MAX6037 is available in the miniature 5-pin SOT23 package and is specified over the -40C to +125C automotive temperature range. Adjustable VOUT: 1.184V to 5V Fixed Outputs: 1.25V, 2.048V, 2.5V, 3.0V, 3.3V, and 4.096V Shutdown Current <500nA (max) 25ppm/C (max) Temperature Coefficient (A Grade) 0.2% (max) Initial Accuracy (A Grade) Low 100mV (max) Dropout Voltage at 1mA Load Current 2.5V to 5.5V Input Voltage Range 5mA Sink and Source Current Capability Available in 5-Pin SOT23 Package Operates Over the Automotive Temperature Range: -40C to +125C
Features
Selector Guide
PART MAX6037AAUK12 MAX6037BAUK12 MAX6037CAUK12 MAX6037AAUK21 MAX6037BAUK21 MAX6037CAUK21 MAX6037AAUK25 MAX6037BAUK25 MAX6037CAUK25 MAX6037AAUK30 MAX6037BAUK30 MAX6037CAUK30 MAX6037AAUK33 MAX6037BAUK33 MAX6037CAUK33 MAX6037AAUK41 MAX6037BAUK41 MAX6037CAUK41 MAX INITIAL OUTPUT TEMPCO ACCURACY VOLTAGE (V) (ppm/C) (%, max) 1.25 1.25 1.25 2.048 2.048 2.048 2.5 2.5 2.5 3.0 3.0 3.0 3.3 3.3 3.3 4.096 4.096 4.096 25 50 50 25 50 50 25 50 50 25 50 50 25 50 50 25 50 50 25 50 50 0.2 0.3 0.5 0.2 0.3 0.5 0.2 0.3 0.5 0.2 0.3 0.5 0.2 0.3 0.5 0.2 0.3 0.5 0.2 0.3 0.5
Applications
Medical Equipment Wireless LAN Portable Equipment Precision Regulators
Ordering Information
PART MAX6037AAUK12-T MAX6037BAUK12-T TEMP RANGE -40C to +125C -40C to +125C PINTOP PACKAGE MARK 5 SOT23-5 5 SOT23-5 AEIV AEIW AEIX
MAX6037CAUK12-T -40C to +125C 5 SOT23-5 Ordering Information continued at end of data sheet.
Typical Operating Circuit
2.5V TO 5.5V INPUT
IN
OUT
REFERENCE OUTPUT
*
* OPTIONAL
MAX6037
SHDN GND 0.02F TO 1F
MAX6037AAUKADJ* 1.184 to 5, adj MAX6037BAUKADJ* 1.184 to 5, adj MAX6037CAUKADJ* 1.184 to 5, adj
Pin Configuration appears at end of data sheet.
*The accuracy of the MAX6037_ADJ is dependent on the accuracy of the external resistors. Use 1% resistors with low temperature coefficient for best overall accuracy. 1
________________________________________________________________ Maxim Integrated Products
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Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
ABSOLUTE MAXIMUM RATINGS
IN, OUT, SHDN, ADJ to GND...................................-0.3V to +6V Output Short Circuit to GND or IN............................. Continuous Continuous Power Dissipation (TA = +70C) 5-Pin SOT23 (derate 7.1mW/C above +70C)............571mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C 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--MAX6037_12 (VOUT = 1.25V)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT MAX6037A_12 (0.2%) Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation VOUT TA = +25C MAX6037A_12 MAX6037B/C_12 2.5V VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA OUT Short-Circuit Current Thermal Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 3V, SHDN pulled from low to high 6 15 360 75 125 0.02 1 s VP-P VRMS ISC VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN MAX6037B_12 (0.3%) MAX6037C_12 (0.5%) TCVOUT VOUT/VIN 1.2475 1.2462 1.2438 1.250 1.250 1.250 6 6 0.0006 0.008 0.006 0.025 0.014 16 32 485 133 1.2525 1.2538 1.2563 25 50 0.0096 0.072 0.072 0.12 0.12 mA ppm ppm %/mA ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
Turn-On Settling Time Output Impedance when Disabled Capacitive-Load Stability Range (Note 4) INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current
tR
ZOUT COUT
VIN = 3V, VSHDN = 0V
k F
VIN IIN ISHDN
Guaranteed by line regulation test VSHDN = 0V
2.5 190 0.05
5.5 275 500
V A nA
2
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Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS--MAX6037_12 (VOUT = 1.25V) (continued)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current VENH VENL IENH IENL 2.5V VIN 5.5V 2.5V VIN 5.5V 2.5V VIN 5.5V, VSHDN = VIN 2.5V VIN 5.5V, VSHDN = 0V -1000 -1000 0.15 0.05 2.0 0.7 +1000 +1000 V V nA nA SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6037
ELECTRICAL CHARACTERISTICS--MAX6037_21 (VOUT = 2.048V)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT MAX6037A_21 (0.2%) Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation VOUT TA = +25C MAX6037A_21 MAX6037B/C_21 2.5V VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA OUT Short-Circuit Current Thermal Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 3V, SHDN pulled from low to high 11 25 2.1 2 205 0.02 1 ms VP-P VRMS ISC VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN MAX6037B_21 (0.3%) MAX6037C_21 (0.5%) TCVOUT VOUT/VIN 2.0439 2.0418 2.0378 2.0480 2.0480 2.0480 6 6 0.0008 0.006 0.004 0.02 0.01 16 32 458 133 2.0521 2.0542 2.0582 25 50 0.0107 0.044 0.044 0.195 0.195 mA ppm ppm %/mA ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
Turn-On Settling Time Output Impedance when Disabled Capacitive-Load Stability Range (Note 4) INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current
tR
ZOUT COUT
VIN = 3V, VSHDN = 0V
k F
VIN IIN ISHDN
Guaranteed by line regulation test VSHDN = 0V
2.5 190 0.05
5.5 275 500
V A nA
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3
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
ELECTRICAL CHARACTERISTICS--MAX6037_21 (VOUT = 2.048V) (continued)
(VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current VENH VENL IENH IENL 2.5V VIN 5.5V 2.5V VIN 5.5V 2.5V VIN 5.5V, VSHDN = VIN 2.5V VIN 5.5V, VSHDN = 0V -1000 -1000 0.15 0.05 2.0 0.7 +1000 +1000 V V nA nA SYMBOL CONDITIONS MIN TYP MAX UNITS
ELECTRICAL CHARACTERISTICS--MAX6037_25 (VOUT = 2.500V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT MAX6037A_25 (0.2%) Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation VOUT TA = +25C MAX6037A_25 MAX6037B/C_25 (VOUT + 0.2V) VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA OUT Short-Circuit Current Dropout Voltage (Note 5) Thermal Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 5V, SHDN pulled from low to high 14 30 2.2 2 250 0.02 1 ms VP-P VRMS ISC VIN - VOUT VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN ISOURCE = 1mA ISOURCE = 5mA MAX6037B_25 (0.3%) MAX6037C_25 (0.5%) TCVOUT VOUT/VIN 2.4950 2.4925 2.4875 2.500 2.500 2.500 6 6 0.0004 0.005 0.003 0.02 0.01 33 32 40 190 514 133 100 410 2.5050 2.5075 2.5125 25 50 0.012 0.036 0.036 0.2 0.2 mA mV ppm ppm %/mA ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
Turn-On Settling Time Output Impedance when Disabled Capacitive-Load Stability Range (Note 4)
tR
ZOUT COUT
VIN = 5V, VSHDN = 0V
k F
4
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Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS--MAX6037_25 (VOUT = 2.500V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current VENH VENL IENH IENL 2.7V VIN 5.5V 2.7V VIN 5.5V 2.7V VIN 5.5V, VSHDN = VIN 2.7V VIN 5.5V, VSHDN = 0V -1000 -1000 0.15 0.05 2.0 0.75 +1000 +1000 V V nA nA VIN IIN ISHDN VSHDN = 0V Guaranteed by line regulation test 2.7 210 0.05 5.5 275 500 V A nA SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6037
ELECTRICAL CHARACTERISTICS--MAX6037_30 (VOUT = 3.000V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT MAX6037A_30 (0.2%) Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation VOUT TA = +25C MAX6037A_30 MAX6037B/C_30 (VOUT + 0.2V) VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA OUT Short-Circuit Current Dropout Voltage (Note 5) Thermal Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 5V, SHDN pulled from low to high 17 40 2.4 2.1 ms VP-P VRMS ISC VIN - VOUT VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN ISOURCE = 1mA ISOURCE = 5mA MAX6037B_30 (0.3%) MAX6037C_30 (0.5%) TCVOUT VOUT/VIN 2.9940 2.9910 2.9850 3.000 3.000 3.000 6 6 0.0004 0.005 0.008 0.02 0.01 33 32 40 190 501 133 100 410 3.0060 3.0090 3.0150 25 50 0.0133 0.035 0.03 0.2 0.2 mA mV ppm ppm %/mA ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
Turn-On Settling Time
tR
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5
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
ELECTRICAL CHARACTERISTICS--MAX6037_30 (VOUT = 3.000V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Output Impedance when Disabled Capacitive-Load Stability Range (Note 4) INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current VENH VENL IENH IENL 3.2V VIN 5.5V 3.2V VIN 5.5V 3.2V VIN 5.5V, VSHDN = VIN 3.2V VIN 5.5V, VSHDN = 0V -1000 -1000 0.15 0.05 2.0 0.8 +1000 +1000 V V nA nA VIN IIN ISHDN VSHDN = 0V Guaranteed by line regulation test 3.2 210 0.05 5.5 275 500 V A nA SYMBOL ZOUT COUT CONDITIONS VIN = 5V, VSHDN = 0V 0.02 MIN TYP 300 1 MAX UNITS k F
ELECTRICAL CHARACTERISTICS--MAX6037_33 (VOUT = 3.300V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation VOUT TA = +25C MAX6037A_33 MAX6037B/C_33 (VOUT + 0.2V) VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA OUT Short-Circuit Current Dropout Voltage (Note 5) Thermal Hysteresis (Note 3) Long-Term Stability ISC VIN - VOUT VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN ISOURCE = 1mA ISOURCE = 5mA MAX6037A_33 (0.2%) MAX6037B_33 (0.3%) MAX6037C_33 (0.5%) TCVOUT VOUT/VIN 3.2934 3.2901 3.2855 3.300 3.300 3.300 6 6 0.0003 0.005 0.002 0.02 0.01 33 32 40 190 514 133 100 410 3.3066 3.3099 3.3165 25 50 0.0133 0.027 0.027 0.212 0.212 mA mV ppm ppm %/mA ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
6
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Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS--MAX6037_33 (VOUT = 3.300V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 5V, SHDN pulled from low to high 19 45 2.6 2.4 330 0.02 1 ms VP-P VRMS SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6037
Turn-On Settling Time Output Impedance when Disabled Capacitive-Load Stability Range (Note 4) INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current
tR
ZOUT COUT
VIN = 5V, VSHDN = 0V
k F
VIN IIN ISHDN VENH VENL IENH IENL
Guaranteed by line regulation test VSHDN = 0V 3.5V VIN 5.5V 3.5V VIN 5.5V 3.5V VIN 5.5V, VSHDN = VIN 3.5V VIN 5.5V, VSHDN = 0V
3.5 210 0.05 2.0
5.5 275 500
V A nA V
0.8 -1000 -1000 0.15 0.05 +1000 +1000
V nA nA
ELECTRICAL CHARACTERISTICS--MAX6037_41 (VOUT = 4.096V)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT MAX6037A_41 (0.2%) Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation VOUT TA = +25C MAX6037A_41 MAX6037B/C_41 (VOUT + 0.2V) VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA MAX6037B_41 (0.3%) MAX6037C_41 (0.5%) TCVOUT VOUT/VIN 4.0878 4.0837 4.0755 4.096 4.096 4.096 6 6 0.0003 0.004 0.002 0.02 0.01 4.1042 4.1083 4.1165 25 50 0.0105 0.35 0.027 0.212 0.212 %/mA ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
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7
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
ELECTRICAL CHARACTERISTICS--MAX6037_41 (VOUT = 4.096V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1F, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUT Short-Circuit Current Dropout Voltage (Note 5) Thermal Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 5V, SHDN pulled from low to high 24 50 3.2 3.2 410 0.02 1 ms VP-P VRMS SYMBOL ISC VIN - VOUT VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN ISOURCE = 1mA ISOURCE = 5mA CONDITIONS MIN TYP 33 32 40 190 524 133 100 410 MAX UNITS mA mV ppm ppm
Turn-On Settling Time Output Impedance when Disabled Capacitive-Load Stability Range (Note 4) INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current
tR
ZOUT COUT
VIN = 5V, VSHDN = 0
k F
VIN IIN ISHDN VENH VENL IENH IENL
Guaranteed by line regulation test VSHDN = 0V 4.3V VIN 5.5V 4.3V VIN 5.5V 4.3V VIN 5.5V, VSHDN = VIN 4.3V VIN 5.5V, VSHDN = 0V
4.3 210 0.05 2.0
5.5 275 500
V A nA V
0.8 -1000 -1000 0.15 0.05 +1000 +1000
V nA nA
8
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Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23
ELECTRICAL CHARACTERISTICS--MAX6037_ADJ (VOUT = 1.184V to 5V)
(VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER OUTPUT MAX6037A_ADJ (0.2%) Initial Output Voltage (Note 6) Output Voltage Range Output-Voltage Temperature Coefficient (Notes 2, 7) Line Regulation (Note 8) VOUT VOUT TCVOUT VOUT/VIN MAX6037A_ADJ MAX6037B/C_ADJ 2.5V VIN 5.5V Sourcing: 0 IOUT 1mA Load Regulation VOUT/IOUT Sourcing: 1mA IOUT 5mA Sinking: -1mA IOUT 0 Sinking: -5mA IOUT -1mA OUT Short-Circuit Current Dropout Voltage (Notes 5, 9) Thermal Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage (Note 10) eOUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02F Initial power-up VIN = 5V, SHDN pulled from low to high 6 15 360 75 >10 0.02 1 s VP-P VRMS ISC VIN - VOUT VOUT/cycle VOUT/time 1000h at TA = +25C Short to GND Short to IN ISOURCE = 1mA, VOUT = 5V ISOURCE = 5mA, VOUT = 5V TA = +25C MAX6037B_ADJ (0.3%) MAX6037C_ADJ (0.5%) 1.1816 1.1805 1.1781 1.184 6 6 0.0008 0.012 0.014 0.005 0.005 33 32 40 190 421 133 100 410 1.1840 1.1840 1.1840 1.1864 1.1875 1.1899 VIN - 0.15 25 50 0.013 0.078 0.1 0.12 0.12 mA mV ppm ppm %/mA V ppm/C %/V V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6037
Turn-On Settling Time Output Impedance when Disabled (Note 11) Capacitive-Load Stability Range (Note 4) INPUT Supply Voltage Range Quiescent Supply Current Shutdown Supply Current ADJ Input Bias Current (Note 4)
tR
ZOUT COUT
VIN = 5V, VSHDN = 0V
M F
VIN IIN ISHDN IADJ
Guaranteed by line regulation test VSHDN = 0V
2.5 200 0.15 -50 0.5
5.5 250 500 +50
V A nA nA
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9
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
ELECTRICAL CHARACTERISTICS--MAX6037_ADJ (VOUT = 1.184V to 5V) (continued)
(VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER SHUTDOWN (SHDN) Logic-High Input Voltage Logic-Low Input Voltage Logic-High Input Current Logic-Low Input Current VENH VENL IENH IENL 2.5V VIN 5.5V 2.5V VIN 5.5V 2.5V VIN 5.5V, VSHDN = VIN 2.5V VIN 5.5V, VSHDN = 0V -1000 -1000 0.15 0.05 2.0 0.7 +1000 +1000 V V nA nA SYMBOL CONDITIONS MIN TYP MAX UNITS
Note 1: All devices are 100% tested at TA = +25C and are guaranteed by design for TA = TMIN to TMAX, as specified. Note 2: Temperature coefficient is measured by the "box" method, i.e., the maximum VOUT / VOUT is divided by the maximum T. Note 3: Thermal hysteresis is defined as the change in +25C output voltage before and after cycling the device from TMAX to TMIN. Note 4: Not production tested. Guaranteed by design. Note 5: Dropout voltage is defined as the minimum differential voltage (VIN - VOUT) at which VOUT decreases by 1% from its original value at VIN = +5.0V. Note 6: VOUT initial accuracy for the MAX6037_ADJ is tested with ADJ shorted to OUT. Actual accuracy will be affected by matching and the temperature coefficient of the external resistors used. Use 1% resistors with low temperature coefficient for best overall accuracy. Note 7: The temperature coefficient for the MAX6037_ADJ is specified for the case where ADJ is connected to OUT. For the case where an external resistive network is used to set the output voltage, actual change in reference output over temperature will be affected by the temperature coefficient and matching of the external resistors used. Note 8: The minimum VIN is the greater of +2.5V and (VOUT + 0.2V). Note 9: VOUT set to +5V with an external resistive-divider. Note 10: Noise for the MAX6037_ADJ is specified for a +1.25V output. Noise is proportional to VOUT and is greater for higher output voltages. In addition, external resistors used to set the output voltage can contribute to noise.
Typical Operating Characteristics
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1F, CIN = 0.1F, TA = +25C, unless otherwise specified.)
MAX6037_25 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.500V)
2.5075 OUTPUT VOLTAGE (V) 2.5050 2.5025 2.5000 2.4975 2.4950 2.4925 2.4900 -50 -25 0 25 50 75 100 125 TEMPERATURE (C) 180 170 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V) TA = -40C 150 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
MAX6037 toc01
MAX6037_12 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 1.25V)
MAX6037 toc02
MAX6037_12 SUPPLY CURRENT vs. TEMPERATURE (VOUT = 1.25V)
MAX6037 toc03
2.5100
230 220 SUPPLY CURRENT (A) TA = +125C 210 200 190 TA = +25C
250 VIN = +5.5V SUPPLY CURRENT (A) 225
200 VIN = +2.5V 175
10
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Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1F, CIN = 0.1F, TA = +25C, unless otherwise specified.)
MAX6037_25 DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 2.500V)
MAC6037 toc04
MAX6037_12 LOAD REGULATION (VOUT = 1.25V)
MAX6037 toc05
MAX6037_41 LOAD REGULATION (VOUT = 4.096V)
5 OUTPUT VOLTAGE CHANGE (mV) 4 3 2 1 0 -1 -2 -3 10 -10 -5 0 5 10 OUTPUT CURRENT (mA) SOURCING CURRENT TA = +125C TA = -40C SINKING CURRENT TA = -40C TA = +25C TA = +125C
MAX6037 toc06
600 500 DROPOUT VOLTAGE (mV) 400 300 200 100 0 0 2 4 6 8 TA = +125C
4 TA = +125C OUTPUT VOLTAGE CHANGE (mV) 3 2 TA = +25C 1 TA = -40C 0 -1 -2 SINKING CURRENT SOURCING CURRENT TA = +125C -10 -5 0 5 TA = -40C
6
TA = -40C TA = +25C
10
SOURCE CURRENT (mA)
OUTPUT CURRENT (mA)
MAX6037_12 LINE REGULATION vs. TEMPERATURE (VOUT = 1.25V)
MAX6037 toc07
MAX6037_25 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.500V)
MAX6037 tpc08
MAX6037_41 SHUTDOWN CURRENT vs. TEMPERATURE (VOUT = 4.096V)
2.5 SHUTDOWN CURRENT (nA) 2.0 1.5 1.0 0.5 0 -0.5
MAX6037 toc09
0 OUTPUT VOLTAGE CHANGE (V)
0 -20 -40 PSRR (dB)
3.0
-20
TA = +125C
-40 TA = +25C -60 TA = -40C
-60 -80 -100
-80 2.5 3.0 3.5 4.0 4.5 5.0 5.5 INPUT VOLTAGE (V)
-120 0.001
0.01
0.1
1
10
100
1000
-50
-25
0
25
50
75
100
125
FREQUENCY (kHz)
TEMPERATURE (C)
MAX6037_12 LINE TRANSIENT (VOUT = 1.25V)
MAX6037 toc10
MAX6037_41 LINE TRANSIENT (VOUT = 4.096V)
MAX6037 toc11
MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V)
MAX6037 toc12
+3.3V VIN +3V
+10A 5.5V VIN 5V IOUT -10A
COUT = 0.1F CIN = 0 400s/div
VOUT AC-COUPLED 10mV/div
COUT = 0.1F CIN = 0 400s/div
VOUT AC-COUPLED 10mV/div COUT = 1F 1ms/div
VOUT AC-COUPLED 2mV/div
______________________________________________________________________________________
11
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1F, CIN = 0.1F, TA = +25C, unless otherwise specified.)
MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V)
+5mA IOUT -5mA
MAX6037 toc13
MAX6037 toc14
MAX6037 toc15
+10A IOUT -10A
+5mA IOUT -5mA
VOUT AC-COUPLED 2mV/div COUT = 0.02F 400s/div COUT = 1F 1ms/div
VOUT AC-COUPLED 200mV/div COUT = 0.02F 1ms/div
VOUT AC-COUPLED 200mV/div
MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V)
MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V)
+10A IOUT -10A
MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V)
+10A IOUT -10A
MAX6037 toc16
MAX6037 toc17
MAX6037 toc18
+5mA IOUT -5mA
VOUT AC-COUPLED 2mV/div COUT = 1F 1ms/div COUT = 0.02F 1ms/div
VOUT AC-COUPLED 5mV/div COUT = 1F 1ms/div
VOUT AC-COUPLED 200mV/div
MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V)
MAX6037 toc19
MAX6037_12 TURN-ON TRANSIENT (VOUT = 1.25V)
+5mA IOUT -5mA
MAX6037 toc20
MAX6037_41 TURN-ON TRANSIENT (VOUT = 4.096V)
MAX6037 toc21
+3V VIN GND
+5V VIN
GND +1.25V VOUT AC-COUPLED 200mV/div COUT = 0.02F 1ms/div 40s/div COUT = 0.02F 400s/div VOUT 500mV/div GND COUT = 0.02F 4.096V VOUT 2V/div GND
12
______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1F, CIN = 0.1F, TA = +25C, unless otherwise specified.)
MAX6037_12 SHUTDOWN TRANSIENT (VOUT = 1.25V) MAX6037_12 EXITING SHUTDOWN TRANSIENT (VOUT = 1.25V) MAX6037 toc23
+3V VSHDN GND 1.25V VOUT 500mV/div GND COUT = 0.02F 2ms/div 10s/div COUT = 0.02F
MAX6037 toc22
+3V VSHDN GND 1.25V VOUT 500mV/div GND
MAX6037_41 SHUTDOWN TRANSIENT (VOUT = 4.096V)
MAX6037_41 EXITING SHUTDOWN TRANSIENT (VOUT = 4.096V)
MAX6037 toc24
MAX6037 toc25
+5V VSHDN
+5V VSHDN
GND +4.096V VOUT 2V/div GND COUT = 0.02F 10ms/div 400s/div COUT = 0.02F
GND +4.096V VOUT 2V/div GND
MAX6037_25 LONG-TERM STABILITY vs. TIME (VOUT = 2.500V)
2.5015 2.5010 VOUT (V) 2.5005 2.5000 2.4995 2.4990 2.4985 TWO TYPICAL PARTS 2.4980 0 200 400 600 800 1000 TIME (HOURS)
MAX6037 toc26
2.5020
______________________________________________________________________________________
13
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
Typical Operating Characteristics (continued)
(VIN = +3V for the MAX6037_12 and MAX6037_21; VIN = +5V for the MAX6037_25, MAX6037_30, MAX6037_33, and MAX6037_41; IOUT = 0, COUT = 0.1F, CIN = 0.1F, TA = +25C, unless otherwise specified.)
MAX6037_41 OUTPUT NOISE (0.1Hz TO 10Hz)
MAX6037 toc27
MAX6037_12 OUTPUT NOISE (0.1Hz TO 10Hz)
MAX6037 toc28
VOUT 10V/div
VOUT 2V/div
VOUT = 4.096V 1s/div 1s/div
VOUT = 1.25V
Note 12: Many of the MAX6037 family Typical Operating Characteristics are extremely similar. The extremes of these characteristics are found in the MAX6037_12 (1.25V output) and the MAX6037_41 (4.096V output). The Typical Operating Characteristics of the remainder of the MAX6037 family typically lie between those two extremes and can be estimated based on their output voltages.
Pin Description
PIN NAME I.C. 1 ADJ FUNCTION Internally connected. (All fixed output voltage options.) Do not connect anything to this pin. Output Voltage Adjustment Connection. Connect a resistor-divider between OUT, ADJ and GND to set the output voltage. (MAX6037_ADJ only). Ground Active-Low Shutdown Input. Pull SHDN low to disable the device. Connect SHDN to IN for normal operation. Supply Voltage Input. Bypass with a 0.1F to 1F capacitor to GND. Reference-Voltage Output. Connect an output capacitor to GND in the 0.02F to 1F range.
( ) MAX6037_AUKADJ.
Pin Configuration
TOP VIEW
I.C. (ADJ) 1 5 OUT
GND 2 SHDN 3
MAX6037
4
IN
2 3
GND SHDN
SOT23
4
IN
5
OUT
14
______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23
Detailed Description
The MAX6037 is a family of low-dropout, micropower voltage references. These devices all feature a shutdown mode by forcing SHDN low, dropping the quiescent current to less than 500nA. The MAX6037 can sink and source up to 5mA with less than 410mV of dropout voltage, making them attractive for use in low-voltage applications. The MAX6037 is available in six fixed output voltages of 1.25V, 2.048V, 2.5V, 3.0V, 3.3V and 4.096V, and an adjustable output version for voltages between the range of 1.184V and 5V.
MAX6037_ADJ Adjustable Output Voltage
Set the output voltage on the MAX6037_ADJ by placing a resistor-divider network between OUT, ADJ, and GND (See Figure 1). Use the following formula to calculate the output voltage: R1 VOUT = 1 + VADJ R2 where VADJ = 1.184V. Set R2 = 1M or less. Currents through Resistor R1 and R2 add to the quiescent supply current.
MAX6037
Shutdown
The MAX6037 features an active-low shutdown mode. Pulling SHDN low disables the output and forces the quiescent current to less than 500nA (typically 50pA). Connect SHDN to IN for normal operation.
Supply Current
The quiescent supply current of the series-mode MAX6037 family is typically 190A to 210A. When the supply voltage is below the minimum-specified input voltage during turn-on, the device can draw up to 250A beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on.
2.5V TO 5.5V INPUT
IN
REFERENCE OUTPUT OUT R1
Thermal Hysteresis
Output voltage hysteresis is the change of output voltage at T A = +25C before and after the device is cycled over its entire operating temperature range. The typical thermal hysteresis value is 500ppm.
*
MAX6037_ADJ
SHDN ADJ 0.02F TO 1F R2
GND
* OPTIONAL
Figure 1. MAX6037_ADJ Typical Operating Circuit
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 2. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error ______________________________________________________________________________________ 15
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037
Turn-On Time
These devices typically turn on and settle to within 0.1% of their final value in 360s to 3.2ms, depending on the device. The turn-on time can increase up to 10ms with the device operating at the minimum dropout voltage and the maximum capacitive load.
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 throughout the operating temperature range. Figure 2 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.
Applications Information
Input Bypassing
For the best transient performance, decouple the input with a 0.1F to 1F ceramic capacitor as shown in the Typical Operating Circuit. Locate the capacitor as close to IN as possible. No capacitor is necessary if transient performance is less important.
Output/Load Capacitance
Devices in the MAX6037 family require an output capacitance in the range of 0.02F to 1F for frequency stability.
Ordering Information (continued)
PART MAX6037AAUK21-T MAX6037BAUK21-T MAX6037CAUK21-T MAX6037AAUK25-T MAX6037BAUK25-T MAX6037CAUK25-T MAX6037AAUK30-T MAX6037BAUK30-T MAX6037CAUK30-T MAX6037AAUK33-T MAX6037BAUK33-T MAX6037CAUK33-T MAX6037AAUK41-T MAX6037BAUK41-T MAX6037CAUK41-T MAX6037AAUKADJ-T MAX6037BAUKADJ-T TEMP RANGE -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C -40C to +125C PINTOP PACKAGE MARK 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 5 SOT23-5 AEIY AEIZ AEJA AEJB AEJC AEJD AEJE AEJF AEJG AEJH AEJI AEJJ AEJK AEJL AEJM AEIS AEIT AEIU
Chip Information
TRANSISTOR COUNT: 372 PROCESS: BiCMOS
MAX6037CAUKADJ-T -40C to +125C
16
______________________________________________________________________________________
Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23
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.)
SOT-23 5L .EPS
MAX6037
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 17 (c) 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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