Low-Cost, Low-Power, Low-Dropout, SOT23-3 Voltage References
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- Georgia Lawrence
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1 ; Rev 1; /99 Low-Cost, Low-Power, Low-Dropout, General Description The family of SOT23, low-cost series voltage references meets the cost advantage of shunt references and offers the power-saving advantage of series references, which traditionally cost more. Unlike conventional shunt-mode (two-terminal) references that must be biased at the load current and require an external resistor, these devices eliminate the need for an external resistor and offer a supply current that is virtually independent of the supply voltage. These micropower, low-dropout, low-cost devices are ideal for high-volume, cost-sensitive 3V and 5V batteryoperated systems with wide variations in supply voltage that require very low power dissipation. Additionally, these devices are internally compensated and do not require an external compensation capacitor, saving valuable board area in space-critical applications. Applications Portable/Battery-Powered Equipment Notebook Computers PDAs, GPSs, and DMMs Cellular Phones Pagers Hard-Disk Drives Selector Guide 1% max Initial Accuracy 100ppm/ C max Temperature Coefficient 5µA max Quiescent Supply Current 0.8µA/V Supply Current Variation with V IN ±00µA Output Source and Sink Current 100mV Dropout at 00µA Load Current 0.12µV/µA Load Regulation 8µV/V Line Regulation Stable with C LOAD = 0 to 2.2nF PART Features Ordering Information TEMP. RANGE PIN- PACKAGE SOT TOP MARK EUR-T MAX6002EUR-T -0 C to +85 C -0 C to +85 C 3 SOT SOT23-3 FZCW FZCX MAX6003EUR-T -0 C to +85 C 3 SOT23-3 FZDK MAX600EUR-T -0 C to +85 C 3 SOT23-3 FZCY EUR-T -0 C to +85 C 3 SOT23-3 FZCZ PART VOLTAGE (V) INPUT VOLTAGE (V) to 12.6 MAX6002 MAX ( + 200mV) to 12.6 ( + 200mV) to 12.6 Typical Operating Circuit MAX ( + 200mV) to ( + 200mV) to SUPPLY INPUT (SEE SELECTOR GUIDE) TOP VIEW IN OUT 1 2 Pin Configuration MAX6002 MAX6003 MAX600 3 GND * IN MAX6002 MAX6003 MAX600 GND OUT REFERENCE OUT 2.2nF MAX* SOT23-3 *CAPACITORS ARE OPTIONAL Maxim Integrated Products 1 For free samples & the latest literature: or phone For small orders, phone
2 ABSOLUTE MAXIMUM RATINGS Voltages Referenced to GND IN V to +13.5V OUT V to (V IN + 0.3V) Output Short Circuit to GND or IN (V IN < 6V)...Continuous Output Short Circuit to GND or IN (V IN 6V)...60sec 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 2.5V V IN 12.6V Sourcing: 0 I OUT 00µA Sinking: -00µA I OUT 0 Short to GND Short to IN Continuous Power Dissipation (T A = +70 C) SOT23-3 (derate.0mw/ C above +70 C)...320mW Operating Temperature Range...-0 C to +85 C Storage Temperature Range C to +150 C Lead Temperature (soldering, 10sec) C (V IN = +5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage V Output Voltage Temperature Coefficient (Note 2) Line Regulation Load Regulation OUT Short-Circuit Current Temperature Hysteresis (Note 3) TC I OUT I SC ppm/ C µv/v µv/µa ma ppm Long-Term Stability 1,000 hours at 50 ppm/ 1,000hrs DYNAMIC Noise Voltage e OUT f = 0.1Hz to 10Hz f = 10Hz to 10kHz µvp-p µv RMS Ripple Rejection V IN = 5V ±100mV, f = 120Hz 86 db Turn-On Settling Time t R To = 0.1% of final value, C OUT = 50pF 30 µs Capacitive-Load Stability Range C OUT (Note ) nf INPUT Supply Voltage Range V IN Guaranteed by line-regulation test V Quiescent Supply Current I IN 27 5 µa Change in Supply Current I IN /V IN 2.5V V IN 12.6V µa/v 2
3 ELECTRICAL CHARACTERISTICS MAX6002 (V IN = +5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage V Output Voltage Temperature Coefficient (Note 2) INPUT TC ppm/ C Line Regulation (V + 0.2V) V IN 12.6V µv/v IN Sourcing: 0 I OUT 00µA Load Regulation µv/µa I OUT Sinking: -00µA I OUT Dropout Voltage V IN - I mv (Note 5) = 00µA OUT Short to GND OUT Short-Circuit Current I SC ma Short to IN Temperature Hysteresis (Note 3) Long-Term Stability 1,000 hours at 130 ppm 50 ppm/ 1,000hrs DYNAMIC Noise Voltage e OUT f = 0.1Hz to 10Hz 60 µvp-p f = 10Hz to 10kHz 125 µv RMS Ripple Rejection V IN = 5V ±100mV, f = 120Hz 82 db Turn-On Settling Time t R To = 0.1% of final value, C OUT = 50pF 85 µs Capacitive-Load Stability Range C OUT (Note ) nf Supply Voltage Range V IN Guaranteed by line-regulation test V Quiescent Supply Current I IN 27 5 µa Change in Supply Current I IN /V IN ( + 0.2V) V IN 12.6V µa/v 3
4 ELECTRICAL CHARACTERISTICS MAX6003 (V IN = +5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage V Output Voltage Temperature Coefficient (Note 2) TC ppm/ C Line Regulation (V V) V IN 12.6V µv/v IN Sourcing: 0 I OUT 00µA Load Regulation µv/µa I OUT Sinking: -00µA I OUT Dropout Voltage V IN - I (Note 5) = 00µA mv OUT Short to GND OUT Short-Circuit Current I SC ma Short to IN Temperature Hysteresis (Note 3) Long-Term Stability 1,000 hours at 130 ppm 50 ppm/ 1,000hrs DYNAMIC Noise Voltage e OUT f = 0.1Hz to 10Hz 75 µvp-p f = 10Hz to 10kHz 150 µv RMS Ripple Rejection V IN = 5V ±100mV, f = 120Hz 80 db Turn-On Settling Time t R To = 0.1% of final value, C OUT = 50pF 100 µs Capacitive-Load Stability Range C OUT (Note ) nf INPUT Supply Voltage Range V IN Guaranteed by line-regulation test V Quiescent Supply Current I IN 27 5 µa Change in Supply Current I IN /V IN ( + 0.2V) V IN 12.6V µa/v
5 ELECTRICAL CHARACTERISTICS MAX600 (V IN = +5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) PARAMETER Output Voltage Output Voltage Temperature Coefficient (Note 2) 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 SYMBOL TC I OUT V IN - I SC e OUT t R COUT V IN I IN I IN /V IN ( + 0.2V) V IN 12.6V Sourcing: 0 I OUT 00µA I OUT = 00µA Short to GND Short to IN 1,000 hours at 1,000 hours at f = 0.1Hz to 10Hz f = 10Hz to 10kHz V IN = 5V ±100mV, f = 120Hz To = 0.1% of final value, C OUT = 50pF (Note ) CONDITIONS Guaranteed by line-regulation test ( + 0.2V) V IN 12.6V MIN TYP MAX Sinking: -00µA I OUT UNITS V ppm/ C µv/v µv/µa mv ma ppm ppm/ 1,000hrs µvp-p µv RMS db µs nf V µa µa/v 5
6 ELECTRICAL CHARACTERISTICS (V IN = +5.5V, I OUT = 0, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output Voltage V INPUT PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output Voltage Temperature Coefficient (Note 2) TC ppm/ C Line Regulation VIN ( + 0.2V) V IN 12.6V µv/v Load Regulation Sourcing: 0 I OUT 00µA I OUT Sinking: -00µA I OUT µv/µa Dropout Voltage V IN - (Note 5) I OUT = 00µA mv OUT Short-Circuit Current I SC Short to GND Short to IN ma Temperature Hysteresis (Note 3) 130 ppm Long-Term Stability 1,000 hours at 50 ppm/ 1,000hrs DYNAMIC Noise Voltage e OUT f = 0.1Hz to 10Hz 120 µvp-p f =10Hz to 10kHz 20 µv RMS Ripple Rejection V IN = 5V ±100mV, f = 120Hz 72 db Turn-On Settling Time t R To = 0.1% of final value, C OUT = 50pF 220 µs Capacitive-Load Stability Range C OUT (Note ) nf Supply Voltage Range V IN Guaranteed by line-regulation test V Quiescent Supply Current I IN 27 5 µa Change in Supply Current I IN /V IN ( + 0.2V) V IN 12.6V µa/v Note 1: All devices are 100% production tested at and are guaranteed by design for T A = T MIN to T MAX, as specified. Note 2: Temperature coefficient is measured by the box method; i.e., the maximum 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 T MIN to T MAX. Note : Not production tested. Guaranteed by design. Note 5: Dropout voltage is the minimum input voltage at which changes 0.2% from at V IN = 5.0V (V IN = 5.5V for ). 6
7 Typical Operating Characteristics (V IN = +5V for MAX600, V IN = +5.5V for ; I OUT = 0; ; unless otherwise noted.) (Note 6) VOUT (V) VOLTAGE CHANGE (µv) VOLTAGE CHANGE (mv) VOLTAGE TEMPERATURE DRIFT THREE TYPICAL PARTS TEMPERATURE DRIFT ( C) LINE REGULATION T A = -0 C T A = +85 C INPUT VOLTAGE (V) LOAD REGULATION T A = -0 C T A = +85 C LOAD CURRENT (µa) VOUT (V) VOLTAGE CHANGE (µv) VOLTAGE CHANGE (mv) VOLTAGE TEMPERATURE DRIFT.988 THREE TYPICAL PARTS TEMPERATURE DRIFT ( C) LINE REGULATION T A = -0 C T A = +85 C INPUT VOLTAGE (V) LOAD REGULATION T A = -0 C T A = +85 C LOAD CURRENT (µa) VOLTAGE (V) DROPOUT VOLTAGE (V) DROPOUT VOLTAGE (V) LONG-TERM DRIFT THREE TYPICAL PARTS ,000 TIME (HOURS) MAX6002/MAX6003 DROPOUT VOLTAGE vs. SOURCE CURRENT T A = -0 C T A = +85 C ,000 SOURCE CURRENT (µa) MAX600/ DROPOUT VOLTAGE vs. SOURCE CURRENT T A = +85 C T A = -0 C ,000 SOURCE CURRENT (µa)
8 PSR (mv/v) Typical Operating Characteristics (continued) (V IN = +5V for MAX600, V IN = +5.5V for ; I OUT = 0; ; unless otherwise noted.) (Note 6) POWER-SUPPLY REJECTION vs. FREQUENCY k 10k 100k 1M 10M FREQUENCY (Hz) 1k IMPEDANCE vs. FREQUENCY PSR (mv/v) k POWER-SUPPLY REJECTION vs. FREQUENCY V CC = 5.5V ±0.25V k 10k 100k 1M 10M FREQUENCY (Hz) IMPEDANCE vs. FREQUENCY MAX SUPPLY CURRENT (µa) SUPPLY CURRENT vs. INPUT VOLTAGE VALID OVER SPECIFIED V IN (MIN) TO V IN (MAX) FOR EACH PART INPUT VOLTAGE (V) SUPPLY CURRENT vs. TEMPERATURE IMPEDANCE (Ω) IMPEDANCE (Ω) SUPPLY CURRENT (µa) V IN = 12.5V V IN = 7.5V V IN = 5.5V V IN = 2.5V ( ONLY) k 10k 100k 1M FREQUENCY (Hz) k 10k 100k 1M FREQUENCY (Hz) TEMPERATURE ( C) 0.1Hz TO 10Hz NOISE 0.1Hz TO 10Hz NOISE TURN-ON TRANSIENT V IN 1V/div µV/div 20µV/div 1V/div 1sec/div 1sec/div 10µs/div 8
9 Typical Operating Characteristics (continued) (V IN = +5V for MAX600, V IN = +5.5V for ; I OUT = 0; ; unless otherwise noted.) (Note 6) I OUT 0µA/div 20mV/div LOAD-TRANSIENT RESPONSE µs/div I OUT = ±25µA, AC-COUPLED +25µA -25µA I OUT 50µA/div 50mV/div LOAD-TRANSIENT RESPONSE 20µs/div V IN = 5.5V, I OUT = ±25µA, AC-COUPLED -20 V IN 2V/div 2V/div TURN-ON TRANSIENT 10µs/div -21 LOAD-TRANSIENT RESPONSE -22 LOAD-TRANSIENT RESPONSE LINE-TRANSIENT RESPONSE I OUT 1mA/div +500µA -500µA I OUT 500µA/div -23 V IN 200mV/div mV/div 0.2V/div 100mV/div 10µs/div I OUT = ±500µA, AC-COUPLED 20µs/div V IN = 5.5V, I OUT = ±500µA, AC-COUPLED LINE-TRANSIENT RESPONSE µs/div V IN = 5V ±0.25V, AC-COUPLED V IN 200mV/div 100mV/div 2µs/div V IN = 5.5V ±0.25V, AC-COUPLED Note 6: Many of the Typical Operating Characteristics of the family are extremely similar. The extremes of these characteristics are found in the (1.2V output) and (5.0V output) devices. The Typical Operating Characteristics of the remainder of the family typically lie between these two extremes and can be estimated based on their output voltage. 9
10 Pin Description PIN NAME FUNCTION 1 IN Supply Voltage Input 2 OUT Reference Voltage Output 3 GND Ground Detailed Description The bandgap references offer a temperature coefficient of <100ppm/ C and initial accuracy of better than 1%. These devices can sink and source up to 00µA 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. Supply Current The quiescent supply current of these series-mode references is a maximum of 5µA and is virtually independent of the supply voltage, with only a 0.8µA/V variation with supply voltage. Unlike shunt-mode references, the load current of these series-mode references is drawn from the supply voltage only when required, so supply current is not wasted and efficiency is maximized over the entire supply voltage range. 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 200µA 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 in the output voltage at 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. V S V CC V+ +2V S MAX681 GND V- IN MAX6002 MAX6003 MAX600 GND OUT 1M, 0.1% V+ ICL7652 +REF 1M, 0.1% 10nF V- -2V S -REF Figure 1. Positive and Negative References from Single +3V or +5V Supply 10
11 Turn-On Time These devices typically turn on and settle to within 0.1% of their final value in 30µs to 220µs depending on the device. The turn-on can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load. 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. TRANSISTOR COUNT: 70 Chip Information 11
12 Package Information SOTPO3L.EPS 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. 12 Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
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