19-1613; Rev 0; 1/00 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References Applications Portable Battery-Powered Systems Notebook Computers PDAs, GPSs, DMMs Cellular Phones Hard-Disk Drives Features ♦ Ultra-Small 3-Pin SOT23 Package ♦ Low Cost ♦ Stable with CLOAD = 0 to 1µF ♦ 5mA Source Current ♦ ±0.4% max Initial Accuracy ♦ Low 75ppm/°C Temperature Coefficient ♦ 150µA max Quiescent Supply Current ♦ 50mV Dropout at 1mA Load Current Ordering Information PART TEMP. RANGE PINPACKAGE TOP MARK MAX6101EUR-T -40°C to +85°C 3 SOT23-3 FZGT MAX6102EUR-T MAX6103EUR-T MAX6104EUR-T MAX6105EUR-T -40°C to +85°C -40°C to +85°C -40°C to +85°C -40°C to +85°C 3 SOT23-3 3 SOT23-3 3 SOT23-3 3 SOT23-3 FZGU FZGV FZGW FZGX Note: There is a minimum order increment of 2500 pieces for SOT packages. Selector Guide PART OUTPUT VOLTAGE (V) MAX6101 1.250 2.5 to 12.6 MAX6102 MAX6103 MAX6104 MAX6105 2.500 3.000 4.096 5.000 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6 (VOUT + 200mV) to 12.6 Typical Operating Circuit INPUT VOLTAGE RANGE (V) Pin Configuration +SUPPLY INPUT (SEE SELECTOR GUIDE) TOP VIEW IN OUT REFERENCE OUT MAX6101 MAX6102 MAX6103 MAX6104 MAX6105 * GND IN 1 OUT 2 MAX6101 MAX6102 MAX6103 MAX6104 MAX6105 3 GND 1µF MAX* SOT23-3 *CAPACITORS ARE OPTIONAL. ________________________________________________________________ Maxim Integrated Products 1 For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Powered by ICminer.com Electronic-Library Service CopyRight 2003 MAX6101–MAX6105 General Description The MAX6101–MAX6105 are low-cost, low-dropout (LDO), micropower voltage references. These three-terminal references operate with an input voltage range from (VOUT + 200mV) to 12.6V and are available with output voltage options of 1.25V, 2.5V, 3V, 4.096V, and 5V. They feature a proprietary curvature-correction circuit and laser-trimmed thin-film resistors that result in a low temperature coefficient of 75ppm/°C (max) and an initial accuracy of ±0.4% (max). These devices are specified over the extended temperature range (-40°C to +85°C). These series-mode voltage references draw only 90µA of supply current and can source 5mA and sink 2mA of load current. Unlike conventional shunt-mode (two-terminal) references that waste supply current and require an external resistor, these devices offer a supply current that is virtually independent of the supply voltage (with only a 4µA/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 1µF of load capacitance. Eliminating the external compensation capacitor saves valuable board area in space-critical applications. Their LDO voltage and supply-independent, ultra-low supply current make these devices ideal for battery-operated, high-performance, low-voltage systems. The MAX6101–MAX6105 are available in tiny 3-pin SOT23 packages. MAX6101–MAX6105 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References 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) .........................60s Continuous Power Dissipation (TA = +70°C) 3-Pin SOT23 (derate 4.0mW/°C above +70°C)............320mW Operating Temperature Range ...........................-40°C to +85°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—MAX6101, VOUT = 1.25V (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Output Voltage SYMBOL VOUT Output Voltage Temperature Coefficient (Notes 2, 3) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT OUT Short-Circuit Current ISC Long-Term Stability ∆VOUT/ time Output Voltage Hysteresis (Note 4) ∆VOUT/ cycle CONDITIONS TA = +25°C MIN TYP MAX UNITS 1.245 1.250 1.255 V 0°C to +70°C 65 -40°C to +85°C 75 2.5V ≤ VIN ≤ 12.6V 7 90 Sourcing: 0 ≤ IOUT ≤ 4mA 0.7 0.9 Sinking: -2mA ≤ IOUT ≤ 0 0.03 3.0 ppm/°C µV/V mV/mA Short to GND 25 Short to IN 25 1000h at +25°C 50 ppm/ 1000h 130 ppm mA DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range (Note 3) eOUT ∆VOUT/ ∆VIN tR f = 0.1Hz to 10Hz 13 µVp-p f = 10Hz to 10kHz 15 µVRMS VIN = 5V ±100mV, f = 120Hz 86 dB To VOUT = 0.1% of final value, COUT = 50pF 50 µs COUT 0 1.0 µF 2.5 12.6 V INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN 2 Guaranteed by line-regulation test 2.5V ≤ VIN ≤ 12.6V 90 150 µA 4 10 µA/V _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Output Voltage SYMBOL VOUT Output Voltage Temperature Coefficient (Notes 2, 3) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 5) VIN VOUT OUT Short-Circuit Current ISC CONDITIONS TA = +25°C MIN TYP MAX UNITS 2.490 2.50 2.510 V 0°C to +70°C 65 -40°C to +85°C 75 (VOUT + 0.2V) ≤ VIN ≤ 12.6V 12 300 Sourcing: 0 ≤ IOUT ≤ 5mA 0.6 0.9 Sinking: -2mA ≤ IOUT ≤ 0 0.025 6.0 IOUT = 1mA 50 200 Short to GND 25 Short to IN 25 ppm/°C µV/V mV/mA mV mA Long-Term Stability ∆VOUT/ time 1000h at +25°C 50 ppm/ 1000h Output Voltage Hysteresis (Note 4) ∆VOUT/ cycle (Note 2) 130 ppm f = 0.1Hz to 10Hz 27 µVp-p f = 10Hz to 10kHz 30 µVRMS VIN = 5V ±100mV, f = 120Hz 86 dB To VOUT = 0.1% of final value, COUT = 50pF 115 µs DYNAMIC CHARACTERISTICS Noise Voltage eOUT ∆VOUT/ ∆VIN Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range (Note 3) tR COUT 0 1.0 µF VOUT + 0.2 12.6 V INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V 90 150 µA 4 10 µA/V _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 3 MAX6101–MAX6105 ELECTRICAL CHARACTERISTICS—MAX6102, VOUT = 2.50V MAX6101–MAX6105 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References ELECTRICAL CHARACTERISTICS—MAX6103, VOUT = 3.0V (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Output Voltage SYMBOL VOUT Output Voltage Temperature Coefficient (Notes 2, 3) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 5) VIN VOUT OUT Short-Circuit Current ISC Long-Term Stability ∆VOUT/ time Output Voltage Hysteresis (Note 4) ∆VOUT/ cycle CONDITIONS TA = +25°C MIN TYP MAX UNITS 2.988 3.000 3.012 V 0°C to +70°C 65 -40°C to +85°C 75 (VOUT + 0.2V) ≤ VIN ≤ 12.6V 13 400 ppm/°C µV/V Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9 Sinking: -2mA ≤ IOUT ≤ 0 0.018 7.0 IOUT = 1mA 50 200 Short to GND 25 Short to IN 25 1000h at +25°C 50 ppm/ 1000h 130 ppm mV/mA mV mA DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range (Note 3) eOUT ∆VOUT/ ∆VIN tR f = 0.1Hz to 10Hz 35 µVp-p f = 10Hz to 10kHz 40 µVRMS VIN = 5V ±100mV, f = 120Hz 76 dB To VOUT = 0.1% of final value, COUT = 50pF 115 µs COUT 0 1.0 µF VOUT + 0.2 12.6 V INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN 4 Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V 90 150 µA 4 10 µA/V _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References (VIN = +5V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Output Voltage SYMBOL VOUT Output Voltage Temperature Coefficient (Notes 2, 3) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 5) VIN VOUT OUT Short-Circuit Current ISC Long-Term Stability ∆VOUT/ time Output Voltage Hysteresis (Note 4) ∆VOUT/ cycle CONDITIONS TA = +25°C MIN TYP MAX UNITS 4.080 4.096 4.112 V 0°C to +70°C 65 -40°C to +85°C 75 (VOUT + 0.2V) ≤ VIN ≤ 12.6V ppm/°C 20 430 Sourcing: 0 ≤ IOUT ≤ 5mA 0.5 0.9 Sinking: -2mA ≤ IOUT ≤ 0 0.018 8 IOUT = 1mA 50 200 Short to GND 25 Short to IN 25 1000h at +25°C 50 ppm/ 1000h 130 ppm µV/V mV/mA mV mA DYNAMIC CHARACTERISTICS Noise Voltage eOUT ∆VOUT/ ∆VIN Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range (Note 3) tR f = 0.1Hz to 10Hz 50 µVp-p f = 10Hz to 10kHz 50 µVRMS VIN = 5V ±100mV, f = 120Hz 72 dB To VOUT = 0.1% of final value, COUT = 50pF 190 µs COUT 0 1.0 µF VOUT + 0.2 12.6 V INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V 90 150 µA 4 10 µA/V _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 5 MAX6101–MAX6105 ELECTRICAL CHARACTERISTICS—MAX6104, VOUT = 4.096V MAX6101–MAX6105 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References ELECTRICAL CHARACTERISTICS—MAX6105, VOUT = 5.000V (VIN = +5.2V, IOUT = 0, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Output Voltage SYMBOL VOUT Output Voltage Temperature Coefficient (Notes 2, 3) TCVOUT Line Regulation ∆VOUT/ ∆VIN Load Regulation ∆VOUT/ ∆IOUT Dropout Voltage (Note 5) VIN VOUT OUT Short-Circuit Current ISC Long-Term Stability ∆VOUT/ time Output Voltage Hysteresis (Note 4) ∆VOUT/ cycle CONDITIONS TA = +25°C MIN TYP MAX UNITS 4.980 5.000 5.020 V 0°C to +70°C 65 -40°C to +85°C 75 (VOUT + 0.2V) ≤ VIN ≤ 12.6V ppm/°C 25 550 Sourcing: 0 ≤ IOUT ≤ 5mA 0.4 0.9 Sinking: -2mA ≤ IOUT ≤ 0 0.012 10 IOUT = 1mA 50 200 Short to GND 25 Short to IN 25 1000h at +25°C 50 ppm/ 1000h 130 ppm µV/V mV/mA mV mA DYNAMIC CHARACTERISTICS Noise Voltage Ripple Rejection Turn-On Settling Time Capacitive-Load Stability Range (Note 3) eOUT ∆VOUT/ ∆VIN tR f = 0.1Hz to 10Hz 60 µVp-p f = 10Hz to 10kHz 60 µVRMS VIN = 5V ±100mV, f = 120Hz 65 dB To VOUT = 0.1% of final value, COUT = 50pF 300 µs COUT 0 1.0 µF VOUT + 0.2 12.6 V INPUT CHARACTERISTICS Supply Voltage Range VIN Quiescent Supply Current IIN Change in Supply Current IIN/VIN Guaranteed by line-regulation test (VOUT + 0.2V) ≤ VIN ≤ 12.6V 90 150 µA 4 10 µA/V Note 1: Devices are 100% production tested at TA = +25°C and are guaranteed by design from TA = TMIN to TMAX by correlation to sample units characterized over temperature. Note 2: Temperature coefficient is specified by the “box” method; i.e., the maximum ∆VOUT is divided by the maximum ∆t. Note 3: Not production tested. Guaranteed by design. Note 4: Thermal hysteresis is defined as the change in +25°C output voltage before and after temperature cycling of the device from TA = TMIN to TMAX. Note 5: Dropout voltage is the minimum input voltage at which VOUT changes ≤ 0.2% from VOUT at VIN = 5.0V (VIN = 5.5V for MAX6105). 6 _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References MAX6102 OUTPUT VOLTAGE TEMPERATURE DRIFT 2.494 2.493 2.492 2.491 3 TYPICAL PARTS TEMPERATURE RISING 2.490 2.488 4.998 4.996 4.994 -20 0 20 40 60 80 3 TYPICAL PARTS TEMPERATURE RISING 80 60 40 20 0 -40 -20 0 20 40 60 2 80 4 6 8 10 12 14 TEMPERATURE (°C) TEMPERATURE (°C) INPUT VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE MAX6102 DROPOUT VOLTAGE vs. SOURCE CURRENT MAX6102 DROPOUT VOLTAGE vs. SINK CURRENT DROPOUT VOLTAGE (mV) VCC = 3.3V VCC = 2.5V 60 40 TA = +85°C 200 150 100 TA = +25°C TA = -40°C 50 MAX6101 TOC06 VCC = 5V 100 -10 DROPOUT VOLTAGE (mV) 120 0 MAX6101 TOC05 VCC = 12V 80 250 MAX6101 TOC04 140 -20 -30 TA = -40°C -40 -50 -60 TA = +85°C -70 20 TA = +25°C -80 -90 0 -40 -20 0 20 40 60 0 80 1 2 3 4 0 5 0.5 1.0 1.5 2.0 TEMPERATURE (°C) SOURCE CURRENT (mA) SINK CURRENT (mA) MAX6105 DROPOUT VOLTAGE vs. SOURCE CURRENT MAX6105 DROPOUT VOLTAGE vs. SINK CURRENT MAX6102 LOAD REGULATION TA = -40°C 100 -20 -30 TA = -40°C -40 -50 -60 TA = +85°C -70 50 TA = +25°C -80 0 1 2 7 6 TA = +85°C SOURCE SINK 5 4 TA = +25°C 3 2 TA = -40°C 1 TA = -40°C 0 TA = +85°C TA = +25°C -1 -2 -90 0 8 OUTPUT VOLTAGE CHANGE (mV) TA = +25°C MAX6101 TOC08 200 -10 DROPOUT VOLTAGE (mV) TA = +85°C 150 0 MAX6101 TOC07 250 2.5 MAX6101 TOC09 0 DROPOUT VOLTAGE (mV) MAX6101 TOC03 100 4.990 -40 SUPPLY CURRENT (µA) 5.000 4.992 2.489 120 SUPPLY CURRENT (µA) 5.002 OUTPUT VOLTAGE (V) 2.495 SUPPLY CURRENT vs. INPUT VOLTAGE MAX6101 TOC02 2.496 OUTPUT VOLTAGE (V) 5.004 MAX6101 TOC01 2.497 MAX6105 OUTPUT VOLTAGE TEMPERATURE DRIFT 10 12 _______________________________________________________________________________________ 7 3 4 5 6 SOURCE CURRENT (mA) Powered by ICminer.com Electronic-Library Service CopyRight 2003 0 0.5 1.0 1.5 SINK CURRENT (mA) 2.0 2.5 -6 -4 -2 0 2 4 6 8 LOAD CURRENT (mA) MAX6101–MAX6105 Typical Operating Characteristics (TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) MAX6102 LINE REGULATION 3 TA = +25°C 2 TA = -40°C 1 0.15 TA = -40°C 0.10 0.05 TA = +25°C 0 TA = +85°C -0.05 0.35 -0.10 -6 -4 -2 0 2 4 6 8 10 0.15 TA = +85°C 0.10 0.05 TA = +25°C 4 6 8 10 12 14 4 6 8 10 12 INPUT VOLTAGE (V) INPUT VOLTAGE (V) MAX6102 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX6105 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX6101 LINE-TRANSIENT RESPONSE 80 70 60 70 VIN 200mV/div 50 PSRR (dB) 60 50 40 30 40 30 VOUT 200mV/div 20 20 10 10 0.01 0.1 1 10 100 1000 0 0.001 0.01 0.1 1 10 100 FREQUENCY (kHz) MAX6102 LINE-TRANSIENT RESPONSE MAX6105 LINE-TRANSIENT RESPONSE VIN 200mV/div VOUT 5mV/div VOUT 100mV/div 100µs/div OUTPUT IMPEDANCE vs. FREQUENCY 800 700 OUTPUT IMPEDANCE (Ω) VIN 200mV/div 1000 MAX6101 TOC17 FREQUENCY (kHz) MAX6101 TOC16 0 0.001 MAX6101 TOC14 80 MAX6101 TOC13 90 14 MAX6101 TOC15 LOAD CURRENT (mA) 100 PSRR (dB) 0.20 -0.05 2 12 TA = -40°C 0.25 0 TA = +85°C -1 0.30 MAX6101 TOC18 0 TA = -40°C TA = +25°C 0.20 0.40 MAX6101 TOC12 SINK MAX6101 TOC11 TA = +85°C SOURCE 4 0.25 OUTPUT VOLTAGE CHANGE (mV) MAX6101 TOC10 5 MAX6105 LINE REGULATION OUTPUT VOLTAGE CHANGE (mV) MAX6105 LOAD REGULATION OUTPUT VOLTAGE CHANGE (mV) MAX6101–MAX6105 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References 600 500 400 300 200 100 0 -100 100µs/div 100µs/div 0.01 0.1 1 10 100 1k FREQUENCY (Hz) 8 _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 10k 100k 1M Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References MAX6101 LOAD-TRANSIENT RESPONSE VOUT 200mV/div MAX6101 TOC20 MAX6101 TOC19 MAX6102 LOAD-TRANSIENT RESPONSE (CLOAD = 0) VOUT 200mV/div 5mA 4mA IOUT 5mA/div IOUT 5mA/div -2mA -2mA 200µs/div 200µs/div MAX6105 LOAD-TRANSIENT RESPONSE (CLOAD = 0) VOUT 200mV/div IOUT 5mA/div MAX6101 TOC22 MAX6101 TOC21 MAX6102 LOAD-TRANSIENT RESPONSE (CLOAD = 1µF) VIN 2V/div 5mA VOUT 50mV/div -2mA 200µs/div 200µs/div VIN 5V/div MAX6101 TURN-ON TRANSIENT MAX6101 TOC24 MAX6101 TOC23 MAX6105 LOAD-TRANSIENT RESPONSE (CLOAD = 1µF) VIN 2V/div VOUT 50mV/div VOUT 00mV/div 100µs/div 100µs/div _______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 9 MAX6101–MAX6105 Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) Typical Operating Characteristics (continued) (TA = +25°C, unless otherwise noted.) VIN 2V/div MAX6105 0.1Hz TO 10Hz OUTPUT NOISE 20µV/div MAX6101 TOC27 MAX6102 0.1Hz TO 10Hz OUTPUT NOISE MAX6101 TOC26 MAX6105 TURN-ON TRANSIENT MAX6101 TOC25 MAX6101–MAX6105 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References 20µV/div VOUT 2V/div 100µs/div 1s/div Pin Description PIN NAME FUNCTION 1 IN 2 OUT Reference Output 3 GND Ground Input Voltage 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 IN as possible. Where transient performance is less important, no capacitor is necessary. Output/Load Capacitance Devices in the MAX6101 family do not require an output capacitance for frequency stability. They are stable for capacitive loads from 0 to 1µF. However, in applications where the load or the supply can experience step changes, an output capacitor will reduce the amount of overshoot (undershoot) and improve the circuit’s transient response. Many applications do not require an external capacitor, and the MAX6101 family can offer a significant advantage in these applications when board space is critical. 10 1s/div Supply Current The quiescent supply current of the series-mode MAX6101 family is typically 90µA and is virtually independent of the supply voltage, with only a 10µA/V (max) variation with supply voltage. Unlike series references, shunt-mode 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 at the time. In the MAX6101 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. When the supply voltage is below the minimum specified input voltage (as during turn-on), the devices can draw up to 400µA beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on. Output Voltage Hysteresis Output voltage hysteresis is the change of output voltage at TA = +25°C 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. ______________________________________________________________________________________ Powered by ICminer.com Electronic-Library Service CopyRight 2003 Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References VCC +2VS V+ IN MAX681 GND V- +REF OUTPUT OUT MAX6101 MAX6102 MAX6103 MAX6104 MAX6105 1M, 0.1% V+ OUTPUT GND ICL7652 V1M, 0.1% 10nF -2VS -REF OUTPUT Figure 1. Positive and Negative References from Single +3V or +5V Supply Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 50µs to 300µs. The turn-on time can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load. Chip Information TRANSISTOR COUNT: 117 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. ______________________________________________________________________________________ ICminer.com Electronic-Library Service CopyRight 2003 11 MAX6101–MAX6105 VS Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References MAX6101–MAX6105 Package Information 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. 12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2000 Maxim Integrated Products Printed USA Powered by ICminer.com Electronic-Library Service CopyRight 2003 is a registered trademark of Maxim Integrated Products.