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19-4777; Rev 2; 10/99
Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
General Description
The MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/ MAX6045/MAX6050 precision, low-dropout, micropower voltage references are available in miniature SOT23-3 surface-mount packages. They feature a proprietary curvature-correction circuit and laser-trimmed thin-film resistors that result in a low temperature coefficient of <15ppm/C and initial accuracy of better than 0.2%. These devices are specified over the extended temperature range. These series-mode voltage references draw only 27A of quiescent supply current and can sink or source up to 500A of load current. Unlike conventional shuntmode (two-terminal) references that waste supply current and require an external resistor, devices in the MAX6012 family offer a supply current that's virtually independent of supply voltage (with only a 0.8A/V variation with supply voltage) and do not require an external resistor. Additionally, these internally compensated devices do not require an external compensation capacitor and are stable with up to 2.2nF of load capacitance. Eliminating the external compensation capacitor saves valuable board area in space-critical applications. Their low dropout voltage and supply-independent, ultra-low supply current make these devices ideal for battery-operated, low-voltage systems. o 0.2% max Initial Accuracy o 15ppm/C max Temperature Coefficient o 35A max Quiescent Supply Current o 0.8A/V Supply Current Variation with VIN o 500A Output Source and Sink Current o 100mV Dropout at 500A Load Current o 0.12V/A Load Regulation o 8V/V Line Regulation o Stable with CLOAD = 0 to 2.2nF
Features
MAX6012/6021/6025/6030/6041/6045/6050
Ordering Information
PART TEMP. RANGE PINPACKAGE 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 TOP MARK FZAP FZDA FZAU FZDF FZAQ FZDB FZDW FZDV FZAR FZDC FZAS FZDD FZAT FZDE
MAX6012AEUR-T -40C to +85C MAX6012BEUR-T -40C to +85C MAX6021AEUR-T -40C to +85C MAX6021BEUR-T -40C to +85C MAX6025AEUR-T MAX6025BEUR-T MAX6030AEUR-T MAX6030BEUR-T MAX6041AEUR-T MAX6041BEUR-T MAX6045AEUR-T MAX6045BEUR-T MAX6050AEUR-T MAX6050BEUR-T -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C -40C to +85C
Applications
Hand-Held Equipment Data Acquisition Systems Industrial and Process-Control Systems Battery-Operated Equipment Hard-Disk Drives
Selector Guide
PART MAX6012 MAX6021 MAX6025 MAX6030 MAX6041 MAX6045 MAX6050 OUTPUT VOLTAGE (V) 1.250 2.048 2.500 3.000 4.096 4.500 5.000 INPUT VOLTAGE (V) 2.5 to 12.6 2.5 to 12.6 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6
*
Typical Operating Circuit
+SUPPLY INPUT (SEE SELECTOR GUIDE)
IN OUT
MAX6012 MAX6021 MAX6025 MAX6030 MAX6041 MAX6045 MAX6050
GND
REFERENCE OUT
2.2nF MAX*
Pin Configuration appears at end of data sheet.
*CAPACITORS ARE OPTIONAL
________________________________________________________________ Maxim Integrated Products
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
ABSOLUTE MAXIMUM RATINGS
(Voltages Referenced to GND) IN .........................................................................-0.3V to +13.5V OUT .............................................................-0.3V to (VIN + 0.3V) Output Short Circuit to GND or IN (VIN < 6V) ............Continuous Output Short Circuit to GND or IN (VIN 6V) .....................60sec Continuous Power Dissipation (TA = +70C) 3-Pin SOT23-3 (derate 4.0mW/C above +70C) ........320mW 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--MAX6012
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT MAX6012A Output Voltage VOUT TA = +25C MAX6012B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) VOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN 2.5V VIN 12.6V Guaranteed by line-regulation test 2.5 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 25 65 86 30 2.2 Vp-p VRMS dB s nF VOUT/ time 1000h at TA = +25C VOUT/ VIN VOUT/ IOUT ISC 2.5V VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 Short to GND Short to IN MAX6012A MAX6012B TA = 0C to +70C 1.246 -0.32 1.244 -0.48 6 6 6 6 8 0.12 0.15 4 4 130 50 1.250 1.250 1.254 0.32 1.256 0.48 15 20 25 30 80 0.50 0.60 V/V V/A mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
ELECTRICAL CHARACTERISTICS--MAX6021
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT MAX6021A Output Voltage VOUT TA = +25C MAX6021B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) VOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN 2.5V VIN 12.6V Guaranteed by line-regulation test 2.5 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 40 105 84 70 2.2 Vp-p VRMS dB s nF VOUT/ time 1000h at TA = +25C VOUT/ VIN VOUT/ IOUT ISC 2.5V VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 Short to GND Short to IN MAX6021A MAX6021B 2.043 -0.24 2.040 -0.39 6 6 6 6 10 0.12 0.18 4 4 130 50 2.048 2.048 2.053 0.24 2.056 0.39 15 20 25 30 100 0.55 0.70 V/V V/A mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6012/6021/6025/6030/6041/6045/6050
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
ELECTRICAL CHARACTERISTICS--MAX6025
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT MAX6025A Output Voltage VOUT TA = +25C MAX6025B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) VOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation Dropout Voltage (Note 5) OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN (VOUT + 0.2V) VIN 12.6V Guaranteed by line-regulation test VOUT + 0.2 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 60 125 82 85 2.2 Vp-p VRMS dB s nF VOUT/ VIN VOUT/ IOUT VIN VOUT ISC VOUT/ time VOUT/ time 1000h at TA = +25C MAX6025A MAX6025B 2.495 -0.20 2.490 -0.40 6 6 6 6 15 0.14 0.18 100 4 4 130 50 2.500 2.500 2.505 0.20 2.510 0.40 15 20 25 30 140 0.60 0.80 200 V/V V/A mV mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
(VOUT + 0.2V) VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 IOUT = 500A Short to GND Short to IN
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
ELECTRICAL CHARACTERISTICS--MAX6030
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT MAX6030A Output Voltage VOUT TA = +25C MAX6030B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) VOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation Dropout Voltage (Note 5) OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN (VOUT + 0.2V) VIN 12.6V Guaranteed by line-regulation test VOUT + 0.2 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 75 150 80 100 2.2 Vp-p VRMS dB s nF VOUT/ time 1000h at TA = +25C VOUT/ VIN VOUT/ IOUT VIN VOUT ISC MAX6030A MAX6030B 2.994 -0.20 2.988 -0.40 6 6 6 6 20 0.14 0.18 100 4 4 130 50 3.000 3.000 3.006 0.20 3.012 0.40 15 20 25 30 150 0.60 0.80 200 V/V V/A mV mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6012/6021/6025/6030/6041/6045/6050
(VOUT) +0.2V) VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 IOUT = 500A Short to GND Short to IN
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
ELECTRICAL CHARACTERISTICS--MAX6041
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT OUTPUT MAX6041A Output Voltage VOUT TA = +25C MAX6041B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) VOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation Dropout Voltage (Note 5) OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN (VOUT + 0.2V) VIN 12.6V Guaranteed by line-regulation test VOUT + 0.2 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1 Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 100 200 77 160 2.2 Vp-p VRMS dB s nF VOUT/ VIN VOUT/ IOUT VIN VOUT ISC VOUT/ time VOUT/ time MAX6041A MAX6041B 4.088 -0.20 4.080 -0.39 6 6 6 6 25 0.15 0.20 100 4 4 130 50 4.096 4.096 4.104 0.20 4.112 0.39 15 20 25 30 160 0.70 0.90 200 V/V V/A mV mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
(VOUT + 0.2V) VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 IOUT = 500A Short to GND Short to IN 1000h at TA = +25C 1000h at TA = +25C
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
ELECTRICAL CHARACTERISTICS--MAX6045
(VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT MAX6045A Output Voltage VOUT TA = +25C MAX6045B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) VOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation Dropout Voltage (Note 5) OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current VIN IIN IIN/VIN (VOUT + 0.2V) VIN 12.6V Guaranteed by line-regulation test VOUT + 0.2 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1Hz to 10Hz f = 10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 110 215 76 180 2.2 Vp-p VRMS dB s nF VOUT/ VIN VOUT/ IOUT VIN VOUT ISC VOUT/ time VOUT/ time 1000h at TA = +25C MAX6045A MAX6045B 4.491 -0.20 4.482 -0.40 6 6 6 6 25 0.16 0.22 100 4 4 130 50 4.500 4.500 4.509 0.20 4.518 0.40 15 20 25 30 160 0.80 1.00 200 V/V V/A mV mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX6012/6021/6025/6030/6041/6045/6050
(VOUT + 0.2V) VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 IOUT = 500A Short to GND Short to IN
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
ELECTRICAL CHARACTERISTICS--MAX6050
(VIN = +5.5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Note 1) PARAMETER OUTPUT MAX6050A Output Voltage VOUT TA = +25C MAX6050B TA = 0C to +70C Output Voltage Temperature Coefficient (Note 2) TCVOUT TA = -40C to +85C TA = 0C to +70C TA = -40C to +85C Line Regulation Load Regulation Dropout Voltage (Note 5) OUT Short-Circuit Current Temperature Hysteresis (Note 3) Long-Term Stability DYNAMIC Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range INPUT Supply Voltage Range Quiescent Supply Current Change in Supply Current Note 1: Note 2: Note 3: Note 4: Note 5: VIN IIN IIN/VIN (VOUT + 0.2V) VIN 12.6V Guaranteed by line-regulation test VOUT + 0.2 27 0.8 12.6 35 2.0 V A A/V eOUT VOUT/ VIN tR COUT f = 0.1 Hz to 10Hz f =10Hz to 10kHz VIN = 5V 100mV, f = 120Hz To VOUT = 0.1% of final value, COUT = 50pF (Note 4) 0 120 240 72 220 2.2 Vp-p VRMS dB s nF VOUT/ time 1000h at TA = +25C VOUT/ VIN VOUT/ IOUT VIN VOUT ISC MAX6050A MAX6050B 4.990 -0.20 4.980 -0.40 6 6 6 6 25 0.17 0.24 100 4 4 130 50 5.000 5.000 5.010 0.20 5.020 0.40 15 20 25 30 160 0.85 1.10 200 V/V V/A mV mA ppm ppm/ 1000h ppm/C V % V % SYMBOL CONDITIONS MIN TYP MAX UNITS
(VOUT + 0.2V) VIN 12.6V Sourcing: 0 IOUT 500A Sinking: -500A IOUT 0 IOUT = 500A Short to GND Short to IN
All devices are 100% production tested at TA = +25C and are guaranteed by design for TA = TMIN to TMAX, as specified. Temperature Coefficient is measured by the "box" method, i.e., the maximum VOUT is divided by the maximum t. Temperature Hysteresis is defined as the change in +25C output voltage before and after cycling the device from TMIN to TMAX. Not production tested. Guaranteed by design. Dropout voltage is the minimum input voltage at which VOUT changes 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6050).
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
Typical Operating Characteristics
(VIN = +5V for MAX6012/21/25/30/41/45, VIN = +5.5V for MAX6050; IOUT = 0; TA = +25C; unless otherwise noted.) (Note 6)
MAX6012 OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6012-01
MAX6012/6021/6025/6030/6041/6045/6050
MAX6050 OUTPUT VOLTAGE TEMPERATURE DRIFT
MAX6012-02
MAX6050 LONG-TERM DRIFT
5.002 5.001 OUTPUT VOLTAGE (V) 5.000 4.999 4.998 4.997 4.996 4.995 THREE TYPICAL PARTS
MAX6012-03
1.2510 1.2505 1.2500 VOUT (V)
5.004 5.002 5.000 4.998 VOUT (V) 4.996 4.994 4.992 4.990
5.003
1.2495 1.2490 1.2485 1.2480 1.2475 1.2470 -40 THREE TYPICAL PARTS -20 0 20 40 60 80 100
4.988 4.986 -40 -20 0 20 40
THREE TYPICAL PARTS 60 80 100
4.994 4.993 0 100 200 300 400 500 600 700 800 900 1000 TIME (h)
TEMPERATURE DRIFT (C)
TEMPERATURE DRIFT (C)
MAX6012 LINE REGULATION
MAX6012-04
MAX6050 LINE REGULATION
MAX6012-05
MAX6025/MAX6030 DROPOUT VOLTAGE vs. SOURCE CURRENT
0.7 DROPOUT VOLTAGE (V) 0.6 0.5 TA = -40C 0.4 0.3 0.2 0.1 TA = +25C 0 200 400 600 800 1000 TA = +85C
MAX6012-06
400 OUTPUT VOLTAGE CHANGE (V)
800 OUTPUT VOLTAGE CHANGE (V) TA = +85C 600 TA = -40C 400
0.8
300 TA = +85C 200 TA = -40C
100
200
TA = +25C
0
TA = +25C
0
-100 2 4 6 8 10 12 14 INPUT VOLTAGE (V)
-200 5 7 9 INPUT VOLTAGE (V) 11 13
0 SOURCE CURRENT (A)
MAX6012 LOAD REGULATION
MAX6012-07
MAX6050 LOAD REGULATION
MAX6012-08
MAX6041/MAX6045/MAX6050 DROPOUT VOLTAGE vs. SOURCE CURRENT
MAX6012-09
0.4 OUTPUT VOLTAGE CHANGE (mV)
0.400 OUTPUT VOLTAGE CHANGE (mV)
0.30 0.25 DROPOUT VOLTAGE (V) 0.20 0.15 0.10 0.05 TA = +25C TA = -40C
0.2 TA = -40C 0 TA = +85C -0.2 TA = +25C
0.200 TA = -40C 0
TA = +85C
-0.200
TA = +25C TA = +85C
-0.4 -500 -375 -250 -125
0
125 250 375 500
-0.400 -500 -375 -250 -125
0 0 125 250 375 500 0 200 400 600 800 1000 SOURCE CURRENT (A)
LOAD CURRENT (A)
LOAD CURRENT (A)
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
Typical Operating Characteristics (continued)
(VIN = +5V for MAX6012/21/25/30/41/45, VIN = +5.5V for MAX6050; IOUT = 0; TA = +25C; unless otherwise noted.) (Note 6)
MAX6012 POWER-SUPPLY REJECTION vs. FREQUENCY
MAX6012-10
MAX6050 POWER-SUPPLY REJECTION vs. FREQUENCY
MAX16012-11
SUPPLY CURRENT vs. INPUT VOLTAGE
38 36 SUPPLY CURRENT (A) 34 32 30 28 26 24 22 VALID OVER SPECIFIED VIN (MIN) TO VIN (MAX) FOR EACH PART
MAX6012-12
100
100 VCC = 5.5V 0.25V
40
10 PSR (mV/V) PSR (mV/V)
10
1
1
0.1 0.01 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
0.1 0.01 10 100 1k 10k 100k 1M 10M FREQUENCY (Hz)
20 2 4 6 8 10 12 14 INPUT VOLTAGE (V)
MAX6012 OUTPUT IMPEDANCE vs. FREQUENCY
MAX6012-13
MAX6050 OUTPUT IMPEDANCE vs. FREQUENCY
MAX6012-14
SUPPLY CURRENT vs. TEMPERATURE
MAX6012-15
1k
1k
40
OUTPUT IMPEDANCE ()
OUTPUT IMPEDANCE ()
SUPPLY CURRENT (A)
100
100
35 VIN = 12.5V 30 VIN = 7.5V VIN = 5.5V 25 VIN = 2.5V (MAX6012/MAX6025 ONLY)
10
10
1
1
0.1 0.01 0.1 1 10 100 1k 10k 100k 1M FREQUENCY (Hz)
0.1 0.01 0.1 1 10 100 1k 10k 100k 1M FREQUENCY (Hz)
20 -40 -20 0 20 40 60 80 100 TEMPERATURE (C)
MAX6012 0.1Hz TO 10Hz OUTPUT NOISE
MAX6012-16
MAX6050 0.1Hz TO 10Hz OUTPUT NOISE
MAX6012-17
MAX6012 TURN-ON TRANSIENT
MAX6012-18
VIN 1V/div
VOUT 10V/div
VOUT 20V/div VOUT 1V/div
1sec/div
1sec/div
10s/div
10
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
Typical Operating Characteristics (continued)
(VIN = +5V for MAX6012/21/25/30/41/45, VIN = +5.5V for MAX6050; IOUT = 0; TA = +25C; unless otherwise noted.) (Note 6)
MAX6012 LOAD-TRANSIENT RESPONSE
MAX6012-19 MAX6012-20 MAX6012-21
MAX6012/6021/6025/6030/6041/6045/6050
MAX6050 LOAD-TRANSIENT RESPONSE
+25A
MAX6050 TURN-ON TRANSIENT
IOUT 40A/div
-25A
IOUT 50A/div
VIN 2V/div
VOUT 20mV/div
VOUT 50mV/div
VOUT 2V/div
10s/div IOUT = 25A, AC-COUPLED
20s/div VIN = 5.5V, IOUT = 25A, AC-COUPLED
10s/div
MAX6012 LOAD-TRANSIENT RESPONSE
MAX6012-22
MAX6050 LOAD-TRANSIENT RESPONSE
MAX6012-23
MAX6012 LINE-TRANSIENT RESPONSE
MAX6012-24
+500A IOUT 1mA/div IOUT -500A 500A/div
VIN 200mV/div
VOUT 200mV/div VOUT 0.2V/div VOUT 100mV/div
10s/div IOUT = 500A, AC-COUPLED
20s/div VIN = 5.5V, IOUT = 500A, AC-COUPLED
2.5s/div VIN = 5V 0.25V, AC-COUPLED
MAX6050 LINE-TRANSIENT RESPONSE
MAX6012-25
VIN 200mV/div
VOUT 100mV/div
2s/div VIN = 5.5V 0.25V, AC-COUPLED
Note 6: Many of the Typical Operating Characteristics of the MAX6012 family are extremely similar. The extremes of these characteristics are found in the MAX6012 (1.2V output) and the MAX6050 (5.0V output). The Typical Operating Characteristics of the remainder of the MAX6012 family typically lie between these two extremes and can be estimated based on their output voltage. 11
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Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
Pin Description
PIN 1 2 3 NAME IN OUT GND FUNCTION Supply Voltage Input Reference Voltage Output Ground
Supply Current
The quiescent supply current of these series-mode references is a maximum of 35A and is virtually independent of the supply voltage, with only a 0.8A/V variation with supply voltage. Unlike series references, shuntmode references operate with a series resistor connected to the power supply. The quiescent current of a shunt-mode reference is thus a function of the input voltage. Additionally, shunt-mode references have to be biased at the maximum expected load current, even if the load current is not present all the time. The load current is drawn from the input voltage only when required, so supply current is not wasted and efficiency is maximized at all input voltages. This improved efficiency can help reduce power dissipation and extend battery life. When the supply voltage is below the minimum specified input voltage (as during turn-on), the devices can draw up to 200A beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on.
Detailed Description
The MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/ MAX6045/MAX6050 precision bandgap references use a proprietary curvature-correction circuit and lasertrimmed thin-film resistors, resulting in a low temperature coefficient of <20ppm/C and initial accuracy of better than 0.2%. These devices can sink and source up to 500A with <200mV of dropout voltage, making them attractive for use in low-voltage applications.
Applications Information
Output/Load Capacitance
Devices in this family do not require an output capacitance for frequency stability. They are stable for capacitive loads from 0 to 2.2nF. However, in applications where the load or the supply can experience step changes, an output capacitor will reduce the amount of overshoot (or undershoot) and assist the circuit's transient response. Many applications do not need an external capacitor, and this family can offer a significant advantage in these applications when board space is critical.
Output Voltage Hysteresis
Output voltage hysteresis is the change in 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 bandgap core transistors. The typical temperature hysteresis value is 130ppm.
VS VCC V+ +2VS IN VOUT 1M 0.1% V+ OUTPUT +REF OUTPUT
MAX681
GND
MAX6012 MAX6021 MAX6025 MAX6030 MAX6041 MAX6045 MAX6050
GND
ICL7652
1M 0.1% V10nF -REF OUTPUT
-2VS
Figure 1. Positive and Negative References from Single +3V or +5V Supply
12 ______________________________________________________________________________________
Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
Turn-On Time
These devices typically turn on and settle to within 0.1% of their final value; 30s to 220s depending on the device. The turn-on time can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load.
TOP VIEW
IN 1
Pin Configuration
MAX6012/6021/6025/6030/6041/6045/6050
Positive and Negative Low-Power Voltage Reference
Figure 1 shows a typical method for developing a bipolar reference. The circuit uses a MAX681 voltage doubler/inverter charge-pump converter to power an ICL7652, thus creating a positive as well as a negative reference voltage.
OUT 2
MAX6012 MAX6021 MAX6025 MAX6030 MAX6041 MAX6045 MAX6050
SOT23-3
3
GND
Chip Information
TRANSISTOR COUNT: 70
______________________________________________________________________________________
13
Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
Package Information
14
______________________________________________________________________________________
Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References
NOTES
MAX6012/6021/6025/6030/6041/6045/6050
15
______________________________________________________________________________________
Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References MAX6012/6021/6025/6030/6041/6045/6050
NOTES
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.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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