19-3192; Rev 0; 2/04 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 These series-mode voltage references operate from a 2.5V to 5.5V supply and consume 275µA (max) quiescent current. The output is stable driving loads from 0.02µF to 1µF 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 -40°C to +125°C automotive temperature range. Applications Medical Equipment Wireless LAN Portable Equipment Precision Regulators Ordering Information PINTOP PACKAGE MARK Features ♦ 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: -40°C to +125°C Selector Guide PART MAX INITIAL OUTPUT TEMPCO ACCURACY VOLTAGE (V) (ppm/°C) (%, max) MAX6037AAUK12 1.25 25 0.2 MAX6037BAUK12 1.25 50 0.3 MAX6037CAUK12 MAX6037AAUK21 1.25 2.048 50 25 0.5 0.2 MAX6037BAUK21 2.048 50 0.3 MAX6037CAUK21 2.048 50 0.5 PART TEMP RANGE MAX6037AAUK12-T -40°C to +125°C 5 SOT23-5 AEIV MAX6037AAUK25 MAX6037BAUK25 2.5 2.5 25 50 0.2 0.3 MAX6037BAUK12-T -40°C to +125°C 5 SOT23-5 AEIW MAX6037CAUK25 2.5 50 0.5 MAX6037CAUK12-T -40°C to +125°C 5 SOT23-5 Ordering Information continued at end of data sheet. AEIX MAX6037AAUK30 3.0 25 0.2 MAX6037BAUK30 MAX6037CAUK30 3.0 3.0 50 50 0.3 0.5 MAX6037AAUK33 3.3 25 0.2 MAX6037BAUK33 3.3 50 0.3 MAX6037CAUK33 MAX6037AAUK41 3.3 4.096 50 25 0.5 0.2 MAX6037BAUK41 4.096 50 0.3 MAX6037CAUK41 4.096 50 0.5 MAX6037AAUKADJ* 1.184 to 5, adj MAX6037BAUKADJ* 1.184 to 5, adj 25 50 0.2 0.3 MAX6037CAUKADJ* 1.184 to 5, adj 50 0.5 Typical Operating Circuit 2.5V TO 5.5V INPUT IN * * OPTIONAL OUT REFERENCE OUTPUT MAX6037 SHDN GND Pin Configuration appears at end of data sheet. 0.02µF TO 1µF *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. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 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). MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 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 = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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 = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_12 (0.2%) 1.2475 1.250 1.2525 MAX6037B_12 (0.3%) 1.2462 1.250 1.2538 MAX6037C_12 (0.5%) 1.2438 1.250 1.2563 MAX6037A_12 6 25 MAX6037B/C_12 6 50 2.5V ≤ VIN ≤ 5.5V UNITS OUTPUT Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation Load Regulation OUT Short-Circuit Current VOUT TCVOUT ∆VOUT/∆VIN ∆VOUT/∆IOUT ISC Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time TA = +25°C 0.0006 0.0096 Sourcing: 0 ≤ IOUT ≤ 1mA 0.008 0.072 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.006 0.072 Sinking: -1mA ≤ IOUT ≤ 0 0.025 0.12 Sinking: -5mA ≤ IOUT ≤ -1mA 0.014 0.12 Short to GND 16 Short to IN 32 1000h at TA = +25°C V ppm/°C %/V %/mA mA 485 ppm 133 ppm DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT f = 0.1Hz to 10Hz 6 µVP-P f = 10Hz to 1kHz 15 µVRMS To VOUT = 0.1% of final value, COUT = 0.02µF Initial power-up 360 VIN = 3V, SHDN pulled from low to high 75 VIN = 3V, VSHDN = 0V µs 125 kΩ 0.02 1 µF 2.5 5.5 V 190 275 µA 0.05 500 nA INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Shutdown Supply Current ISHDN 2 Guaranteed by line regulation test VSHDN = 0V _______________________________________________________________________________________ Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VENH 2.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.5V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 2.0 V 0.7 V 0.15 +1000 nA 0.05 +1000 nA ELECTRICAL CHARACTERISTICS—MAX6037_21 (VOUT = 2.048V) (VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_21 (0.2%) 2.0439 2.0480 2.0521 MAX6037B_21 (0.3%) 2.0418 2.0480 2.0542 MAX6037C_21 (0.5%) 2.0378 2.0480 2.0582 MAX6037A_21 6 25 MAX6037B/C_21 6 50 2.5V ≤ VIN ≤ 5.5V 0.0008 0.0107 Sourcing: 0 ≤ IOUT ≤ 1mA 0.006 0.044 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.004 0.044 Sinking: -1mA ≤ IOUT ≤ 0 0.02 0.195 Sinking: -5mA ≤ IOUT ≤ -1mA 0.01 0.195 UNITS OUTPUT Output Voltage VOUT Output-Voltage Temperature Coefficient (Note 2) TCVOUT ∆VOUT/∆VIN Line Regulation ∆VOUT/∆IOUT Load Regulation OUT Short-Circuit Current ISC Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time TA = +25°C Short to GND 16 Short to IN 32 V ppm/°C %/V %/mA mA 458 ppm 1000h at TA = +25°C 133 ppm f = 0.1Hz to 10Hz 11 µVP-P 25 µVRMS DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02µF Initial power-up 2.1 VIN = 3V, SHDN pulled from low to high ms 2 VIN = 3V, VSHDN = 0V 205 0.02 kΩ 1 µF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Shutdown Supply Current ISHDN Guaranteed by line regulation test VSHDN = 0V 2.5 5.5 V 190 275 µA 0.05 500 nA _______________________________________________________________________________________ 3 MAX6037 ELECTRICAL CHARACTERISTICS—MAX6037_12 (VOUT = 1.25V) (continued) MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ELECTRICAL CHARACTERISTICS—MAX6037_21 (VOUT = 2.048V) (continued) (VIN = VSHDN = +3V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VENH 2.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.5V ≤ VIN ≤ 5.5V 0.7 V Logic-High Input Current IENH 2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 0.15 +1000 nA Logic-Low Input Current IENL 2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 0.05 +1000 nA 2.0 V ELECTRICAL CHARACTERISTICS—MAX6037_25 (VOUT = 2.500V) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_25 (0.2%) 2.4950 2.500 2.5050 MAX6037B_25 (0.3%) 2.4925 2.500 2.5075 MAX6037C_25 (0.5%) 2.4875 2.500 2.5125 MAX6037A_25 6 25 MAX6037B/C_25 6 50 (VOUT + 0.2V) ≤ VIN ≤ 5.5V 0.0004 0.012 Sourcing: 0 ≤ IOUT ≤ 1mA 0.005 0.036 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.003 0.036 Sinking: -1mA ≤ IOUT ≤ 0 0.02 0.2 Sinking: -5mA ≤ IOUT ≤ -1mA 0.01 0.2 UNITS OUTPUT Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation Load Regulation VOUT TCVOUT ∆VOUT/∆VIN ∆VOUT/∆IOUT OUT Short-Circuit Current ISC Dropout Voltage (Note 5) VIN - VOUT Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time TA = +25°C Short to GND 33 Short to IN 32 ISOURCE = 1mA 40 100 ISOURCE = 5mA 190 410 V ppm/°C %/V %/mA mA mV 514 ppm 1000h at TA = +25°C 133 ppm f = 0.1Hz to 10Hz 14 µVP-P f = 10Hz to 1kHz 30 µVRMS DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT 4 To VOUT = 0.1% of final value, COUT = 0.02µF Initial power-up 2.2 VIN = 5V, SHDN pulled from low to high ms 2 VIN = 5V, VSHDN = 0V 250 0.02 _______________________________________________________________________________________ kΩ 1 µF Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS 5.5 V 210 275 µA 0.05 500 nA INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Guaranteed by line regulation test 2.7 Shutdown Supply Current ISHDN VSHDN = 0V Logic-High Input Voltage VENH 2.7V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.7V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 2.7V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 2.7V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 SHUTDOWN (SHDN) 2.0 V 0.75 V 0.15 +1000 nA 0.05 +1000 nA ELECTRICAL CHARACTERISTICS—MAX6037_30 (VOUT = 3.000V) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_30 (0.2%) 2.9940 3.000 3.0060 MAX6037B_30 (0.3%) 2.9910 3.000 3.0090 MAX6037C_30 (0.5%) 2.9850 UNITS OUTPUT Output Voltage VOUT Output-Voltage Temperature Coefficient (Note 2) TCVOUT ∆VOUT/∆VIN Line Regulation ∆VOUT/∆IOUT Load Regulation OUT Short-Circuit Current ISC Dropout Voltage (Note 5) VIN - VOUT Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time TA = +25°C 3.000 3.0150 MAX6037A_30 6 25 MAX6037B/C_30 6 50 (VOUT + 0.2V) ≤ VIN ≤ 5.5V 0.0004 0.0133 Sourcing: 0 ≤ IOUT ≤ 1mA 0.005 0.035 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.008 0.03 Sinking: -1mA ≤ IOUT ≤ 0 0.02 0.2 Sinking: -5mA ≤ IOUT ≤ -1mA 0.01 0.2 Short to GND 33 Short to IN 32 V ppm/°C %/V %/mA mA ISOURCE = 1mA 40 100 ISOURCE = 5mA 190 410 mV 501 ppm 1000h at TA = +25°C 133 ppm f = 0.1Hz to 10Hz 17 µVP-P 40 µVRMS DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02µF Initial power-up 2.4 VIN = 5V, SHDN pulled from low to high 2.1 ms _______________________________________________________________________________________ 5 MAX6037 ELECTRICAL CHARACTERISTICS—MAX6037_25 (VOUT = 2.500V) (continued) MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ELECTRICAL CHARACTERISTICS—MAX6037_30 (VOUT = 3.000V) (continued) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT CONDITIONS MIN VIN = 5V, VSHDN = 0V TYP MAX 300 0.02 UNITS kΩ 1 µF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Guaranteed by line regulation test 3.2 Shutdown Supply Current ISHDN VSHDN = 0V Logic-High Input Voltage VENH 3.2V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 3.2V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 3.2V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 3.2V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 5.5 V 210 275 µA 0.05 500 nA SHUTDOWN (SHDN) 2.0 V 0.8 V 0.15 +1000 nA 0.05 +1000 nA ELECTRICAL CHARACTERISTICS—MAX6037_33 (VOUT = 3.300V) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS MAX6037A_33 (0.2%) MAX6037B_33 (0.3%) 3.2934 3.2901 3.300 3.300 3.3066 3.3099 V MAX6037C_33 (0.5%) 3.2855 3.300 3.3165 MAX6037A_33 6 25 MAX6037B/C_33 6 50 (VOUT + 0.2V) ≤ VIN ≤ 5.5V 0.0003 0.0133 Sourcing: 0 ≤ IOUT ≤ 1mA 0.005 0.027 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.002 0.027 Sinking: -1mA ≤ IOUT ≤ 0 0.02 0.212 Sinking: -5mA ≤ IOUT ≤ -1mA 0.01 0.212 OUTPUT Output Voltage Output-Voltage Temperature Coefficient (Note 2) Line Regulation Load Regulation VOUT TCVOUT ∆VOUT/∆VIN ∆VOUT/∆IOUT OUT Short-Circuit Current ISC Dropout Voltage (Note 5) VIN - VOUT Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time 6 TA = +25°C Short to GND 33 Short to IN 32 ISOURCE = 1mA 40 100 ISOURCE = 5mA 190 410 1000h at TA = +25°C ppm/°C %/V %/mA mA mV 514 ppm 133 ppm _______________________________________________________________________________________ Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS DYNAMIC Noise Voltage eOUT Turn-On Settling Time tR Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT f = 0.1Hz to 10Hz f = 10Hz to 1kHz To VOUT = 0.1% of final value, COUT = 0.02µF 19 µVP-P 45 µVRMS Initial power-up 2.6 VIN = 5V, SHDN pulled from low to high 2.4 VIN = 5V, VSHDN = 0V ms 330 0.02 kΩ 1 µF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Guaranteed by line regulation test 3.5 Shutdown Supply Current ISHDN VSHDN = 0V Logic-High Input Voltage VENH 3.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 3.5V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 3.5V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 3.5V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 5.5 V 210 275 µA 0.05 500 nA SHUTDOWN (SHDN) 2.0 V 0.8 V 0.15 +1000 nA 0.05 +1000 nA ELECTRICAL CHARACTERISTICS—MAX6037_41 (VOUT = 4.096V) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_41 (0.2%) 4.0878 4.096 4.1042 MAX6037B_41 (0.3%) 4.0837 4.096 4.1083 MAX6037C_41 (0.5%) 4.0755 UNITS OUTPUT Output Voltage VOUT Output-Voltage Temperature Coefficient (Note 2) Line Regulation Load Regulation TCVOUT ∆VOUT/∆VIN ∆VOUT/∆IOUT TA = +25°C 4.096 4.1165 MAX6037A_41 6 25 MAX6037B/C_41 6 50 (VOUT + 0.2V) ≤ VIN ≤ 5.5V 0.0003 0.0105 Sourcing: 0 ≤ IOUT ≤ 1mA 0.004 0.35 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.002 0.027 Sinking: -1mA ≤ IOUT ≤ 0 0.02 0.212 Sinking: -5mA ≤ IOUT ≤ -1mA 0.01 0.212 V ppm/°C %/V %/mA _______________________________________________________________________________________ 7 MAX6037 ELECTRICAL CHARACTERISTICS—MAX6037_33 (VOUT = 3.300V) (continued) MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 ELECTRICAL CHARACTERISTICS—MAX6037_41 (VOUT = 4.096V) (continued) (VIN = VSHDN = +5V, IOUT = 0, COUT = 0.1µF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL OUT Short-Circuit Current ISC Dropout Voltage (Note 5) VIN - VOUT Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time CONDITIONS MIN TYP Short to GND 33 Short to IN 32 MAX UNITS mA ISOURCE = 1mA 40 100 ISOURCE = 5mA 190 410 mV 524 ppm 1000h at TA = +25°C 133 ppm f = 0.1Hz to 10Hz 24 µVP-P f = 10Hz to 1kHz 50 µVRMS DYNAMIC Noise Voltage Turn-On Settling Time eOUT tR Output Impedance when Disabled ZOUT Capacitive-Load Stability Range (Note 4) COUT To VOUT = 0.1% of final value, COUT = 0.02µF Initial power-up 3.2 VIN = 5V, SHDN pulled from low to high 3.2 VIN = 5V, VSHDN = 0 ms 410 kΩ 0.02 1 µF 4.3 5.5 V 210 275 µA 0.05 500 nA INPUT Supply Voltage Range VIN Guaranteed by line regulation test Quiescent Supply Current IIN Shutdown Supply Current ISHDN VSHDN = 0V Logic-High Input Voltage VENH 4.3V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 4.3V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 4.3V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 4.3V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 SHUTDOWN (SHDN) 8 2.0 V 0.8 V 0.15 +1000 nA 0.05 +1000 nA _______________________________________________________________________________________ Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 (VIN = VSHDN = +5V, IOUT = 0, TA = TMIN to TMAX, ADJ shorted to OUT unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX MAX6037A_ADJ (0.2%) 1.1816 1.1840 1.1864 MAX6037B_ADJ (0.3%) 1.1805 1.1840 1.1875 MAX6037C_ADJ (0.5%) 1.1781 1.1840 UNITS OUTPUT Initial Output Voltage (Note 6) VOUT Output Voltage Range VOUT Output-Voltage Temperature Coefficient (Notes 2, 7) Line Regulation (Note 8) TCVOUT ∆VOUT/∆VIN ∆VOUT/∆IOUT Load Regulation OUT Short-Circuit Current ISC Dropout Voltage (Notes 5, 9) VIN - VOUT Thermal Hysteresis (Note 3) ∆VOUT/cycle Long-Term Stability ∆VOUT/time TA = +25°C 1.184 1.1899 VIN - 0.15 MAX6037A_ADJ 6 25 MAX6037B/C_ADJ 6 50 2.5V ≤ VIN ≤ 5.5V 0.0008 0.013 Sourcing: 0 ≤ IOUT ≤ 1mA 0.012 0.078 Sourcing: 1mA ≤ IOUT ≤ 5mA 0.014 0.1 Sinking: -1mA ≤ IOUT ≤ 0 0.005 0.12 Sinking: -5mA ≤ IOUT ≤ -1mA 0.005 0.12 Short to GND 33 Short to IN 32 V ppm/°C %/V %/mA mA ISOURCE = 1mA, VOUT = 5V 40 100 ISOURCE = 5mA, VOUT = 5V 190 410 1000h at TA = +25°C V mV 421 ppm 133 ppm DYNAMIC Noise Voltage (Note 10) Turn-On Settling Time eOUT tR Output Impedance when Disabled (Note 11) ZOUT Capacitive-Load Stability Range (Note 4) COUT f = 0.1Hz to 10Hz 6 µVP-P f = 10Hz to 1kHz 15 µVRMS To VOUT = 0.1% of final value, COUT = 0.02µF Initial power-up 360 VIN = 5V, SHDN pulled from low to high 75 VIN = 5V, VSHDN = 0V µs >10 0.02 MΩ 1 µF INPUT Supply Voltage Range VIN Quiescent Supply Current IIN Shutdown Supply Current ISHDN ADJ Input Bias Current (Note 4) IADJ Guaranteed by line regulation test 2.5 VSHDN = 0V -50 5.5 V 200 250 µA 0.15 500 nA 0.5 +50 nA _______________________________________________________________________________________ 9 MAX6037 ELECTRICAL CHARACTERISTICS—MAX6037_ADJ (VOUT = 1.184V to 5V) 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 = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SHUTDOWN (SHDN) Logic-High Input Voltage VENH 2.5V ≤ VIN ≤ 5.5V Logic-Low Input Voltage VENL 2.5V ≤ VIN ≤ 5.5V Logic-High Input Current IENH 2.5V ≤ VIN ≤ 5.5V, VSHDN = VIN -1000 Logic-Low Input Current IENL 2.5V ≤ VIN ≤ 5.5V, VSHDN = 0V -1000 2.0 V 0.7 V 0.15 +1000 nA 0.05 +1000 nA Note 1: All devices are 100% tested at TA = +25°C 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 +25°C 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 = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) 2.5025 2.5000 2.4975 TA = +125°C 210 200 TA = +25°C 190 VIN = +5.5V 225 200 VIN = +2.5V 175 2.4950 TA = -40°C 180 2.4925 150 170 2.4900 -50 -25 0 25 50 75 TEMPERATURE (°C) 10 MAX6037 toc03 220 SUPPLY CURRENT (µA) 2.5050 SUPPLY CURRENT (µA) 2.5075 250 MAX6037 toc02 230 MAX6037 toc01 2.5100 MAX6037_12 SUPPLY CURRENT vs. TEMPERATURE (VOUT = 1.25V) MAX6037_12 SUPPLY CURRENT vs. INPUT VOLTAGE (VOUT = 1.25V) MAX6037_25 OUTPUT VOLTAGE vs. TEMPERATURE (VOUT = 2.500V) OUTPUT VOLTAGE (V) MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 100 125 2.5 3.0 3.5 4.0 4.5 INPUT VOLTAGE (V) 5.0 5.5 -50 -25 0 25 50 75 TEMPERATURE (°C) ______________________________________________________________________________________ 100 125 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 400 TA = +125°C 300 200 TA = -40°C TA = +25°C 100 0 2 TA = +25°C 1 TA = -40°C TA = -40°C 0 SINKING CURRENT -1 SOURCING CURRENT 2 4 6 10 8 -5 SOURCE CURRENT (mA) 3.5 4.0 4.5 5.0 0 5 10 3.0 MAX6037 tpc08 -60 -120 0.001 5.5 -5 MAX6037_41 SHUTDOWN CURRENT vs. TEMPERATURE (VOUT = 4.096V) -100 3.0 SOURCING CURRENT TA = +125°C MAX6037_25 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (VOUT = 2.500V) TA = -40°C 2.5 0 -1 OUTPUT CURRENT (mA) -80 -80 TA = -40°C SINKING CURRENT -10 2.5 SHUTDOWN CURRENT (nA) -60 TA = -40°C 1 OUTPUT CURRENT (mA) -20 PSRR (dB) TA = +25°C TA = +25°C 2 -3 -40 -40 3 10 5 TA = +125°C -20 4 -2 0 MAX6037 toc07 0 0 TA = +125°C 5 TA = +125°C -10 MAX6037_12 LINE REGULATION vs. TEMPERATURE (VOUT = 1.25V) 6 MAX6037 toc06 3 -2 0 OUTPUT VOLTAGE CHANGE (µV) MAX6037 toc05 TA = +125°C MAX6037 toc09 DROPOUT VOLTAGE (mV) 500 MAX6037_41 LOAD REGULATION (VOUT = 4.096V) 4 OUTPUT VOLTAGE CHANGE (mV) MAC6037 toc04 600 MAX6037_12 LOAD REGULATION (VOUT = 1.25V) OUTPUT VOLTAGE CHANGE (mV) MAX6037_25 DROPOUT VOLTAGE vs. SOURCE CURRENT (VOUT = 2.500V) 2.0 1.5 1.0 0.5 0 -0.5 0.01 0.1 1 10 100 1000 -50 -25 0 25 50 75 100 INPUT VOLTAGE (V) FREQUENCY (kHz) TEMPERATURE (C) MAX6037_12 LINE TRANSIENT (VOUT = 1.25V) MAX6037_41 LINE TRANSIENT (VOUT = 4.096V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037 toc11 MAX6037 toc10 400µs/div 125 MAX6037 toc12 +10µA +3.3V VIN COUT = 0.1µF CIN = 0 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 = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) 5.5V VIN IOUT +3V 5V -10µA VOUT AC-COUPLED 10mV/div VOUT AC-COUPLED 10mV/div VOUT AC-COUPLED 2mV/div COUT = 0.1µF CIN = 0 400µs/div COUT = 1µF 1ms/div ______________________________________________________________________________________ 11 MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 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 = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037_12 LOAD TRANSIENT (VOUT = 1.25V) MAX6037 toc15 MAX6037 toc14 MAX6037 toc13 +5mA +5mA IOUT IOUT -10µA -5mA -5mA VOUT AC-COUPLED 2mV/div VOUT AC-COUPLED 200mV/div +10µA IOUT COUT = 0.02µF COUT = 1µF VOUT AC-COUPLED 200mV/div COUT = 0.02µF 400µs/div 1ms/div 1ms/div MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V) MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V) MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V) MAX6037 toc18 MAX6037 toc17 MAX6037 toc16 +10µA +10µA +5mA IOUT IOUT IOUT -10µA -10µA -5mA VOUT AC-COUPLED 2mV/div VOUT AC-COUPLED 5mV/div VOUT AC-COUPLED 200mV/div COUT = 1µF COUT = 0.02µF COUT = 1µF 1ms/div 1ms/div 1ms/div MAX6037_41 LOAD TRANSIENT (VOUT = 4.096V) MAX6037_12 TURN-ON TRANSIENT (VOUT = 1.25V) MAX6037_41 TURN-ON TRANSIENT (VOUT = 4.096V) MAX6037 toc19 MAX6037 toc21 MAX6037 toc20 +5mA IOUT +3V VIN -5mA GND +5V VIN GND +1.25V VOUT 2V/div GND GND COUT = 0.02µF COUT = 0.02µF COUT = 0.02µF 1ms/div 12 4.096V VOUT 500mV/div VOUT AC-COUPLED 200mV/div 40µs/div 400µs/div ______________________________________________________________________________________ Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 MAX6037_12 EXITING SHUTDOWN TRANSIENT (VOUT = 1.25V) MAX6037 toc23 MAX6037_12 SHUTDOWN TRANSIENT (VOUT = 1.25V) MAX6037 toc22 +3V VSHDN +3V VSHDN GND GND 1.25V 1.25V VOUT 500mV/div VOUT 500mV/div GND GND COUT = 0.02µF COUT = 0.02µF 2ms/div 10µs/div MAX6037_41 SHUTDOWN TRANSIENT (VOUT = 4.096V) MAX6037_41 EXITING SHUTDOWN TRANSIENT (VOUT = 4.096V) MAX6037 toc25 MAX6037 toc24 +5V +5V VSHDN VSHDN GND GND +4.096V +4.096V VOUT 2V/div VOUT 2V/div GND GND COUT = 0.02µF COUT = 0.02µF 400µs/div 10ms/div MAX6037_25 LONG-TERM STABILITY vs. TIME (VOUT = 2.500V) MAX6037 toc26 2.5020 2.5015 VOUT (V) 2.5010 2.5005 2.5000 2.4995 2.4990 2.4985 TWO TYPICAL PARTS 2.4980 0 200 400 600 800 1000 TIME (HOURS) ______________________________________________________________________________________ 13 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 = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 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 = 0.1µF, CIN = 0.1µF, TA = +25°C, unless otherwise specified.) MAX6037_41 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6037_12 OUTPUT NOISE (0.1Hz TO 10Hz) MAX6037 toc27 MAX6037 toc28 VOUT 10µV/div VOUT 2µV/div VOUT = 4.096V VOUT = 1.25V 1s/div 1s/div 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 FUNCTION I.C. Internally connected. (All fixed output voltage options.) Do not connect anything to this pin. 1 14 ADJ Output Voltage Adjustment Connection. Connect a resistor-divider between OUT, ADJ and GND to set the output voltage. (MAX6037_ADJ only). 2 GND Ground 3 SHDN Active-Low Shutdown Input. Pull SHDN low to disable the device. Connect SHDN to IN for normal operation. 4 IN Supply Voltage Input. Bypass with a 0.1µF to 1µF capacitor to GND. 5 OUT Pin Configuration TOP VIEW I.C. (ADJ) 1 GND 2 SHDN 3 ( ) MAX6037_AUKADJ. 5 OUT 4 IN MAX6037 SOT23 Reference-Voltage Output. Connect an output capacitor to GND in the 0.02µF to 1µF range. ______________________________________________________________________________________ Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 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 = 1MΩ or less. Currents through Resistor R1 and R2 add to the quiescent supply current. 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. 2.5V TO 5.5V INPUT REFERENCE OUTPUT IN OUT R1 * MAX6037_ADJ Supply Current The quiescent supply current of the series-mode MAX6037 family is typically 190µA to 210µA. When the supply voltage is below the minimum-specified input voltage during turn-on, the device can draw up to 250µA beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on. Thermal Hysteresis Output voltage hysteresis is the change of output voltage at T A = +25°C before and after the device is cycled over its entire operating temperature range. The typical thermal hysteresis value is 500ppm. ADJ SHDN 0.02µF TO 1µF GND R2 * OPTIONAL Figure 1. MAX6037_ADJ Typical Operating Circuit 10,000 1000 100 TEMPERATURE COEFFICIENT (ppm/°C) 8-BIT 10 10-BIT 12-BIT 1 14-BIT 16-BIT 0.1 18-BIT 0.01 1 10 OPERATING TEMPERATURE RANGE (TMAX - TMIN) (°C) 20-BIT 100 Figure 2. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error ______________________________________________________________________________________ 15 MAX6037 Detailed Description MAX6037 Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 360µs 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. Applications Information Input Bypassing For the best transient performance, decouple the input with a 0.1µF to 1µF 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 0.02µF to 1µF for frequency stability. 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. Ordering Information (continued) PART TEMP RANGE PINTOP PACKAGE MARK MAX6037AAUK21-T -40°C to +125°C 5 SOT23-5 AEIY MAX6037BAUK21-T -40°C to +125°C 5 SOT23-5 AEIZ MAX6037CAUK21-T -40°C to +125°C 5 SOT23-5 AEJA MAX6037AAUK25-T -40°C to +125°C 5 SOT23-5 AEJB MAX6037BAUK25-T -40°C to +125°C 5 SOT23-5 AEJC MAX6037CAUK25-T -40°C to +125°C 5 SOT23-5 AEJD MAX6037AAUK30-T -40°C to +125°C 5 SOT23-5 AEJE MAX6037BAUK30-T -40°C to +125°C 5 SOT23-5 AEJF MAX6037CAUK30-T -40°C to +125°C 5 SOT23-5 AEJG MAX6037AAUK33-T -40°C to +125°C 5 SOT23-5 AEJH MAX6037BAUK33-T -40°C to +125°C 5 SOT23-5 AEJI MAX6037CAUK33-T -40°C to +125°C 5 SOT23-5 AEJJ MAX6037AAUK41-T -40°C to +125°C 5 SOT23-5 AEJK MAX6037BAUK41-T -40°C to +125°C 5 SOT23-5 AEJL MAX6037CAUK41-T -40°C to +125°C 5 SOT23-5 AEJM MAX6037AAUKADJ-T -40°C to +125°C 5 SOT23-5 AEIS MAX6037BAUKADJ-T -40°C to +125°C 5 SOT23-5 AEIT MAX6037CAUKADJ-T -40°C to +125°C 5 SOT23-5 AEIU 16 Chip Information TRANSISTOR COUNT: 372 PROCESS: BiCMOS ______________________________________________________________________________________ Low-Power, Fixed and Adjustable Reference with Shutdown in SOT23 SOT-23 5L .EPS 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 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX6037 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.)