High-Supply-Voltage, Precision Voltage Reference in SOT23 MAX6035

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1 ; Rev 3; 11/06 High-Supply-Voltage, Precision General Description The is a high-voltage, precision micropower voltage reference. This three-terminal device is available with output voltage options of 2.5V, 3.0V, and 5.0V. It is an excellent upgrade for industry-standard devices such as the REF02 and REF43. The offers 14x lower power than the REF02 and 5x lower power than the REF43, as well as a reduced package size from an 8-pin SO to a 3-pin SOT23. The features a proprietary temperature coefficient curvature-correction circuit and laser-trimmed, thin-film resistors that result in a very low temperature coefficient of 25ppm/ C (max) and an initial accuracy of ±0.2% (max). The typically draws only 73µA of supply current and can source 10mA or sink 2mA of load current. Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external resistor, this device offers a supply current that is virtually independent of the supply voltage and does not require an external resistor. Additionally, this internally compensated device does not require an external compensation capacitor, but is also stable with capacitive loads up to 5µF. Eliminating the external compensation capacitor saves valuable board area in space-critical applications. The supply independent, ultra-low supply current makes this device ideal for battery-operated, high-performance systems. The is available in a 3-pin SOT23 package and is specified for operation from -40 C to +125 C. Applications 4mA to 20mA Industrial Control Loops Li+ Battery Chargers 12-Bit A/D and D/A Converters +SUPPLY INPUT (SEE SELECTOR GUIDE) Digital Multimeters Portable Data-Acquisition Systems Low-Power Test Equipment Typical Operating Circuit Features Wide Supply Voltage Range: Up to 33V 25ppm/ C (max) Temperature Coefficient (-40 C to +85 C) ±0.2% (max) Initial Accuracy 95µA (max) Quiescent Supply Current 10mA Source Current, 2mA Sink Current No Output Capacitor Required Stable with Capacitive Loads up to 5µF Ordering Information PART TEMP RANGE PIN - PA C K A G E TOP MARK AAUR25-T -40 C to +125 C 3 SOT23-3 FZMW BAUR25-T -40 C to +125 C 3 SOT23-3 FZMX ESA25-40 C to +85 C 8 SO AAUR30-T -40 C to +125 C 3 SOT23-3 FZMY BAUR30-T -40 C to +125 C 3 SOT23-3 FZMZ AAUR50-T -40 C to +125 C 3 SOT23-3 FZNA BAUR50-T -40 C to +125 C 3 SOT23-3 FZNB Note: The 3-pin SOT23 package code is U3-1. The 8-pin SO package code is S8-2. PART MAXIMUM TEMPCO (ppm/ C) (-40 C to +85 C) Selector Guide MAXIMUM INITIAL ACCURACY (%) OUTPUT VOLTAGE (V) AAUR BAUR ESA AAUR BAUR AAUR BAUR TOP VIEW Pin Configurations 0.1µF* IN OUT GND REFERENCE OUT IN OUT 1 2 N.C. IN 3 GND N.C. GND N.C. N.C. OUT N.C. *CAPACITOR IS OPTIONAL. SOT23 SO Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at , or visit Maxim s website at

2 ABSOLUTE MAXIMUM RATINGS (Voltages referenced to GND) IN V to +36V OUT V to (V IN + 0.3V) OUT Short-Circuit Duration to GND or IN (Note 1)...Continuous Current into Any Pin...±20mA Continuous Power Dissipation 3-Pin SOT23 (derate 4.0mW/ C above +70 C)...320mW 8-Pin SO (derate 5.9mW/ C above +70 C) mW Note 1: Continuous power dissipation should also be observed. Operating Temperature Range: ESA C to +85 C _AUR C to +125 C Storage Temperature Range C to +150 C Junction Temperature C Lead Temperature (soldering, 10s) 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 _AUR25 and ESA25 (2.5V) (V IN = 5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Output Voltage Temperature Coefficient (Notes 3 and 6) TC T A = 0 C to +70 C to +85 C to +125 C Line Regulation (Note 4) / V IN ( + 2V) V IN 33V Load Regulation (Note 4) / I OUT, _AUR T A = T MIN to T MAX, _AUR, ESA T A = T MIN to T MAX, ESA AAUR, ESA (0.2%) BAUR AAUR 20 BAUR 50 AAUR 25 ESA 40 BAUR 65 AAUR 30 BAUR T A = T MIN to T MAX 20-2mA I OUT 0-2mA I OUT 0-2mA I OUT 0-2mA I OUT 0 Short to GND 27 OUT Short-Circuit Current I SC Short to IN V ppm/ C µv/v µv/ma ma 2

3 ELECTRICAL CHARACTERISTICS _AUR25 and ESA25 (2.5V) (continued) (V IN = 5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS I OUT = 10µA 1.9 Dropout Voltage (Note 7) V IN - I OUT = 10mA 2.25 Thermal Hysteresis (Note 5) V OU T /cycl e 135 ppm Long-Term Stability /time 1000hr at +25 C 110 DYNAMIC CHARACTERISTICS V ppm/ 1000hr f = 0.1Hz to 10Hz 21 µv P-P Output Noise Voltage e n f = 10Hz to 1kHz 20 µv RMS Ripple Rejection / V IN V IN = 5V ±100mV, f = 120Hz 86 db To V C OUT = 50pF 35 Turn-On Settling Time t OUT = 0.1% R of final value C OUT = 1µF 240 Capacitive-Load Stability (Note 6) INPUT CHARACTERISTICS C OUT 0 5 µf Supply Voltage Range V IN Infer r ed fr om l i ne r eg ul ati on and d r op out vol tag e V Quiescent Supply Current I IN µa Change in Supply Current I IN / V IN 4.4V V IN 33V µa/v ELECTRICAL CHARACTERISTICS _AUR30 (3.0V) (V IN = 5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Output Voltage Temperature Coefficient (Note 3) Line Regulation (Note 4) TC T A = 0 C to +70 C to +85 C to +125 C A (0.2%) B (0.5%) A 20 B 50 A 25 B 65 A 30 B / ( V OU T V ) V I N 33V T A = 0 C to +125 C 24 V IN ( + 2V) V IN 33V to +125 C 24 µs V ppm/ C µv/v Load Regulation (Note 4) / I OUT to +125 C -2mA I OUT 0mA -2mA I OUT 0mA µv/ma 3

4 ELECTRICAL CHARACTERISTICS _AUR30 (3.0V) (continued) (V IN = 5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Short to GND 27 OUT Short-Circuit Current I SC Short to IN -4 Dropout Voltage (Note 7) V IN - to +125 C T A = 0 C to +125 C I OUT = 10µA 1.75 I OUT = 10µA 1.9 I OUT = 10mA 2.25 Thermal Hysteresis (Note 5) V OU T /cycl e 135 ppm Long-Term Stability /time 1000hr at +25 C 120 DYNAMIC CHARACTERISTICS ma V ppm/ 1000hr f = 0.1Hz to 10Hz 25 µv P-P Output Noise Voltage e n f = 10Hz to 1kHz 25 µv RMS Ripple Rejection / V IN V IN = 5V ±100mV, f = 120Hz 80 db Turn-On Settling Time t R = 0.1% of final value Capacitive-Load Stability (Note 6) INPUT CHARACTERISTICS C OUT = 50pF 40 C OUT = 1µF 250 C OUT 0 5 µf T A = 0 C to +125 C, inferred from line regulation and dropout voltage Supply Voltage Range V IN to +125 C, inferred from line regulation and dropout voltage Quiescent Current Supply I IN µa Change in Supply Current I IN / V IN 4.9V V IN 33V µa/v µs V ELECTRICAL CHARACTERISTICS _AUR50 (5.0V) (V IN = 5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Output Voltage Temperature Coefficient (Note 3) TC T A = 0 C to +70 C to +85 C to +125 C A (0.2%) B (0.5%) A 20 B 50 A 25 B 65 A 30 B 75 T A = + 25 C Line Regulation (Note 4) / V IN ( + 2V) 33V TA = - 40 C to C 8 40 V ppm/ C µv/v 4

5 ELECTRICAL CHARACTERISTICS _AUR50 (5.0V) (continued) (V IN = 5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Load Regulation (Note 4) / I OUT to +125 C -2mA I OUT 0mA -2mA I OUT 0mA Shorted to GND 27 OUT Short-Circuit Current I SC Shorted to IN µv/ma ma I OUT = 10µA 1.9 Dropout Voltage (Note 7) V IN - I OUT = 10mA 2.25 V Thermal Hysteresis (Note 5) V OU T /cycl e 135 ppm Long-Term Stability /time 1000hr at +25 C 160 DYNAMIC CHARACTERISTICS ppm/ 1000hr f = 0.1Hz to 10Hz 68 µv P-P Output Noise Voltage e n f = 10Hz to 1kHz 48 µv RMS Ripple Rejection / V IN V IN = 15V ±100mV, f = 120Hz 72 db To V C OUT = 50pF 140 Turn-On Settling Time t OUT = 0.1% of final R value C OUT = 1µF 300 µs Capacitive-Load Stability (Note 6) C OUT 0 5 µf INPUT CHARACTERISTICS Supply Voltage Range V IN Inferred by line regulation and dropout voltage V Quiescent Current Supply I IN µa Change in Supply Current I IN / V IN 6.9V V IN 33V µa/v Note 2: All devices are 100% production tested at and are guaranteed by design for T A = T MIN to T MAX, as specified. Note 3: Temperature Coefficient is measured by the box method, i.e., the maximum is divided by the maximum T. Note 4: Line and load regulation are measured with pulses and do not include output voltage fluctuation due to die-temperature changes. Note 5: Thermal Hysteresis is defined as the change in the output voltage at before and after cycling the device from T MAX to T MIN. Note 6: Guaranteed by design. Note 7: Although the source current is guaranteed to be 10mA, exercise caution to ensure that the package s absolute power dissipation rating is not exceeded. 5

6 Typical Operating Characteristics (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) AAUR25 OUTPUT VOLTAGE TEMPERATURE DRIFT THREE TYPICAL PARTS TEMPERATURE ( C) 110 toc AAUR30 OUTPUT VOLTAGE TEMPERATURE DRIFT THREE TYPICAL PARTS TEMPERATURE ( C) 110 toc AAUR50 OUTPUT VOLTAGE TEMPERATURE DRIFT THREE TYPICAL PARTS TEMPERATURE ( C) 110 toc LINE REGULATION ( = 2.5V) T A = +85 C INPUT VOLTAGE (V) toc LINE REGULATION ( = 3V) T A = +85 C INPUT VOLTAGE (V) toc LINE REGULATION ( = 5V) T A = +85 C INPUT VOLTAGE (V) toc LOAD REGULATION ( = 2.5V) T A = +85 C LOAD CURRENT (ma) toc07 LOAD REGULATION ( = 3V) T A = +85 C LOAD CURRENT (ma) toc LOAD REGULATION ( = 5V) T A = +85 C LOAD CURRENT (ma) toc09 6

7 (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY ( = 2.5V) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY ( = 3V) POWER-SUPPLY REJECTION RATIO vs. FREQUENCY ( = 5V) PSRR (db) toc10 PSRR (db) Typical Operating Characteristics (continued) toc11 PSRR (db) toc FREQUENCY (khz) FREQUENCY (khz) FREQUENCY (khz) SUPPLY CURRENT vs. INPUT VOLTAGE ( = 2.5V) toc SUPPLY CURRENT vs. INPUT VOLTAGE ( = 3V) toc SUPPLY CURRENT vs. INPUT VOLTAGE ( = 5V) toc15 SUPPLY CURRENT (µa) SUPPLY CURRENT (µa) SUPPLY CURRENT (µa) INPUT VOLTAGE (V) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 30 OUTPUT IMPEDANCE (Ω) OUTPUT IMPEDANCE vs. FREQUENCY ( = 2.5V) toc16 OUTPUT IMPEDANCE (Ω) OUTPUT IMPEDANCE vs. FREQUENCY ( = 3V) toc17 OUTPUT IMPEDANCE (Ω) OUTPUT IMPEDANCE vs. FREQUENCY ( = 5V) toc FREQUENCY (khz) FREQUENCY (khz) FREQUENCY (khz) 7

Typical Operating Characteristics (continued) (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) 0.1Hz to 10Hz OUTPUT NOISE ( = 2.

5V) toc22 10Hz to 1kHz OUTPUT NOISE ( = 3V) toc23 10Hz to 1kHz OUTPUT NOISE ( = 5V) toc24 50µV/div 50µV/div 100µV/div 100ms/div 100ms/div 100ms/div TURN-ON TRANSIENT ( = 2.

8 Typical Operating Characteristics (continued) (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) 0.1Hz to 10Hz OUTPUT NOISE ( = 2.5V) toc19 0.1Hz to 10Hz OUTPUT NOISE ( = 3V) toc20 0.1Hz to 10Hz OUTPUT NOISE ( = 5V) toc21 10µV/div 10µV/div 20µV/div 1s/div 1s/div 1s/div 10Hz to 1kHz OUTPUT NOISE ( = 2.5V) toc22 10Hz to 1kHz OUTPUT NOISE ( = 3V) toc23 10Hz to 1kHz OUTPUT NOISE ( = 5V) toc24 50µV/div 50µV/div 100µV/div 100ms/div 100ms/div 100ms/div TURN-ON TRANSIENT ( = 2.5V) C L = 50pF toc25 TURN-ON TRANSIENT ( = 3V) C L = 50pF toc26 TURN-ON TRANSIENT ( = 5V) C L = 50pF toc27 V IN 0V V IN 0V V IN 1V/div 0V 1V/div 0V 2V/div 10µs/div 10µs/div 40µs/div 8

9 Typical Operating Characteristics (continued) (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) LOAD TRANSIENT ( = 2.5V) toc28 200mV/div LOAD TRANSIENT ( = 3V) toc29 LOAD TRANSIENT ( = 5V) toc30 40µs/div (I OUT = ±250µA, C L = 0, R L = 10kΩ) (Figure 1) 20µs/div (I OUT = ±250µA, C L = 0, R L = 12kΩ) (Figure 1) 20µs/div (I OUT = ±250µA, C L = 0, R L = 20kΩ) (Figure 1) LOAD TRANSIENT ( = 2.5V) toc31 LOAD TRANSIENT ( = 3V) toc32 LOAD TRANSIENT ( = 5V) toc33 20mV/div 20mV/div 20mV/div 100µs/div (I OUT = ±250µA, C L = 1µF, R L = 10kΩ) (Figure 1) 100µs/div (I OUT = ±250µA, C L = 1µF, R L = 12kΩ) (Figure 1) 100µs/div (I OUT = ±250µA, C L = 1µF, R L = 20kΩ) (Figure 1) LOAD TRANSIENT ( = 2.5V) toc34 LOAD TRANSIENT ( = 3V) toc35 LOAD TRANSIENT ( = 5V) toc36 10µs/div (I OUT = ±2mA, C L = 0, R L = 1.25kΩ) (Figure 1) 40µs/div (I OUT = ±2mA, C L = 0, R L = 1.5kΩ) (Figure 1) 20µs/div (I OUT = ±2mA, C L = 0, R L = 2.5kΩ) (Figure 1) 9

10 Typical Operating Characteristics (continued) (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) LOAD TRANSIENT ( = 2.5V) toc37 LOAD TRANSIENT ( = 3V) toc38 LOAD TRANSIENT ( = 5V) toc39 20mV/div 40µs/div (I OUT = ±2mA, C L = 1µF, R L = 1.25kΩ) (Figure 1) 100µs/div (I OUT = ±2mA, C L = 1µF, R L = 1.5kΩ) (Figure 1) 200µs/div (I OUT = ±2mA, C L = 1µF, R L = 2.5kΩ) (Figure 1) LOAD TRANSIENT ( = 2.5V) toc40 LOAD TRANSIENT ( = 3V) toc41 LOAD TRANSIENT ( = 5V) toc42 20mV/div 20µs/div (I OUT = 0 to 10mA, C L = 0, R L = 250Ω) (Figure 2) 20µs/div (I OUT = 0 to 10mA, C L = 0, R L = 300Ω) (Figure 2) 200µs/div (I OUT = 0 to 10mA, C L = 0, R L = 500Ω) (Figure 2) 10

11 Typical Operating Characteristics (continued) (V IN = 5V for AAUR25/AAUR30, V IN = 15V for AAUR50, I OUT = 0,, unless otherwise noted.) LOAD TRANSIENT ( = 2.5V) toc43 LOAD TRANSIENT ( = 3V) toc44 LOAD TRANSIENT ( = 5V) toc45 100µs/div (I OUT = 0 to 10mA, C L = 1µF, R L = 250Ω) (Figure 2) LINE TRANSIENT ( = 2.5V) toc46 C L = 0 100µs/div (I OUT = 0 to 10mA, C L = 1µF, R L = 300Ω) (Figure 2) LINE TRANSIENT ( = 3V) toc47 C L = 0 100µs/div (I OUT = 0 to 10mA, C L = 1µF, R L = 500Ω) (Figure 2) LINE TRANSIENT ( = 5V) toc48 C L = 0 V IN V IN V IN 4µs/div 10µs/div 4µs/div +V IN +V IN C L C L R L R L 2 0V 0V Figure 1. Load-Transient Test Circuit Figure 2. Load-Transient Test Circuit 11

12 SOT23 PIN SO NAME 1 2 IN Input Voltage FUNCTION 2 6 OUT Reference Output 3 4 GND Ground 1, 3, 5, 7, 8 N.C. Pin Description No Connection. Not internally connected. Applications Information Input Bypassing For the best line-transient performance, decouple the input with a 0.1µF ceramic capacitor as shown in the Typical Operating Circuit. Locate the capacitor as close to the device as possible. Where transient performance is less important, no capacitor is necessary. Output/Load Capacitance Devices in the family do not require any output capacitance for frequency stability. In applications where the load or the supply can experience step changes, an output capacitor of at least 0.1µF reduces the amount of overshoot (undershoot) and improves the circuit s transient response. Many applications do not require an external capacitor, and the family can offer a significant advantage in these applications when board space is critical. Supply Current The quiescent supply current of the seriesmode family is typically 73µA and is virtually independent of the supply voltage, with only a 0.7µA/V (max) variation with supply voltage. In contrast, the quiescent current of a shunt-mode reference is a function of the input voltage due to a series resistor connected to the power supply. Additionally, shunt-mode references have to be biased at the maximum expected load current, even if the load current is not present at the time. In the family, 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 reduces power dissipation and extends battery life. Thermal Hysteresis Thermal hysteresis is the change of output voltage at before and after the device is cycled over its entire operating temperature range. The typical temperature hysteresis value is 135ppm. Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 240µs. Increased output capacitance also increases turn-on time. 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 through the operating temperature range. Figure 3 shows the maximum allowable reference-voltage temperature coefficient to keep the conversion error to less than 1LSB, as a function of the operating temperature range (T MAX - T MIN ) 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 12

13 TEMPERATURE COEFFICIENT (ppm/ C) 10, BIT 10 BIT 12 BIT 14 BIT 16 BIT 18 BIT 20 BIT OPERATING TEMPERATURE RANGE (T MAX - T MIN ) ( C) Figure 3. Temperature Coefficient vs. Operating Temperature Range for a 1 LSB Maximum Error TRANSISTOR COUNT: 84 PROCESS: BiCMOS Chip Information 13

14 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 SOT23 L.EPS 14

15 Package Information (continued) (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to N E H INCHES MILLIMETERS DIM MIN MAX MIN MAX A A B C e BSC 1.27 BSC E H L SOICN.EPS 1 TOP VIEW VARIATIONS: DIM D D D INCHES MILLIMETERS MIN MAX MIN MAX N MS AA AB AC D A C e B A1 FRONT VIEW L SIDE VIEW 0-8 PROPRIETARY INFORMATION TITLE: PACKAGE OUTLINE,.150" SOIC APPROVAL DOCUMENT CONTROL NO. REV B 1 1 Pages changed at Rev 2: 1, 2, 3, 12, 15 Pages changed at Rev 3: 1, 2, 15 Revision History 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 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

N.C. OUT. Maxim Integrated Products 1

N.C. OUT. Maxim Integrated Products 1 19-2892; Rev 2; 11/6 Ultra-Low-Power Precision Series General Description The MAX629 micropower, low-dropout bandgap voltage reference combines ultra-low supply current and low drift in a miniature 5-pin