Low-Cost, Micropower, Low-Dropout, High-Output-Current, SOT23 Voltage References

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Oscar Bell
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1 ; Rev 3; 3/2 Low-Cost, Micropower, Low-Dropout, General Description The are low-cost, low-dropout (LDO), micropower voltage references. These three-terminal references are available with output voltage options of 1.25, 1.8, 2.48, 2.5, 3, 4.96, 4.5, and 5. They feature a proprietary curvature-correction circuit and laser-trimmed, thin-film resistors that result in a low temperature coefficient of 75 C (max) and an initial accuracy of ±.4% (max). These devices are specified over the extended temperature range (-4 C to +85 C). These series-mode voltage references draw only 9µA of supply current and can source 5 and sink 2 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/ 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 load capacitance. Eliminating the external compensation capacitor saves valuable board area in space-critical applications. Lowdropout voltage and supply independent, ultra-low supply current make these devices ideal for battery-operated, high-performance, low-voltage systems. The are available in tiny 3-pin SOT23 packages. Portable Battery-Powered Systems Notebook Computers PDAs, GPSs, DMMs Cellular Phones Hard-Disk Drives Applications Features Ultra-Small 3-Pin SOT23 Package Low Cost No Output Capacitor Required Stable with Capacitive Loads (2 Sink): 8m/ (max) (5 Source):.9m/ (max) ±.4% (max) Initial Accuracy Low 75 C Temperature Coefficient 125µA (max) Quiescent Supply Current m Dropout at 1 Load Current PART Ordering Information TEMP RANGE PIN- PACKAGE TOP MARK MAX61EUR-T -4 C to +85 C 3 SOT23-3 FZID MAX611EUR-T -4 C to +85 C 3 SOT23-3 FZGT MAX612EUR-T -4 C to +85 C 3 SOT23-3 FZGU MAX613EUR-T -4 C to +85 C 3 SOT23-3 FZG MAX614EUR-T -4 C to +85 C 3 SOT23-3 FZGW MAX615EUR-T -4 C to +85 C 3 SOT23-3 FZGX MAX616EUR-T -4 C to +85 C 3 SOT23-3 FZJR MAX617EUR-T -4 C to +85 C 3 SOT23-3 FZM Note: There is a minimum order increment of 2 pieces for SOT23 packages. Selector Guide * Typical Operating Circuit +SUPPLY INPUT (SEE SELECTOR GUIDE) IN GND OUT 1µF* REFERENCE OUT PART OUTPUT OLTAGE () INPUT OLTAGE RANGE () MAX to 12.6 MAX to 12.6 MAX ( + 2m) to 12.6 MAX ( + 2m) to 12.6 MAX ( + 2m) to 12.6 MAX ( + 2m) to 12.6 MAX to 12.6 MAX ( + 2m) to 12.6 *CAPACITORS ARE OPTIONAL. Pin Configuration appears at end of data sheet. 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 (oltages Referenced to GND) IN to OUT to ( +.3) Output Short-Circuit to GND or IN ( < 6)...Continuous Output Short-Circuit to GND or IN ( 6)...6s 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 MAX611, OUT = 1.25 Continuous Power Dissipation (T A = +7 C) 3-Pin SOT23 (derate 4.mW/ C above +7 C)...32mW Operating Temperature Range...-4 C to +85 C Storage Temperature Range C to +1 C Lead Temperature (soldering, 1s)...+3 C ( = 5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output oltage Output oltage Temperature Noise oltage PARAMETER OUT Short-Circuit Current Output oltage Hysteresis Turn-On Settling Time Supply oltage Range Quiescent Supply Current Change in Supply Current SYMBOL TC I OUT I SC e OUT t R I IN I IN / C to +7 C -4 C to +85 C Sourcing: I OUT 5 Sinking: -2 I OUT Short to GND Short to IN 1hr at +25 C f =.1Hz to 1Hz f = 1Hz to 1kHz = 5 ±1m, f = 12Hz To =.1% of final value, C OUT = pf Guaranteed by line-regulation test CONDITIONS MIN TYP MAX UNITS C µ/ m/ 1hr ppm µ P-P µ RMS db µs µa µa/ 2

3 ELECTRICAL CHARACTERISTICS MAX61, OUT = 1.8 ( = 5, T A = T MIN to T MAX, unless otherwise noted. Typical values are at ) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output oltage Output oltage Temperature C to +7 C 65 TC -4 C to +85 C 75 C µ/ Sourcing: I OUT 5.9 I OUT Sinking: -2 IOUT 4. Short to GND 11 OUT Short-Circuit Current I SC Short to IN 12 Output oltage Hysteresis 1hr at +25 C m/ 1hr 13 ppm f =.1Hz to 1Hz 22 µ P-P Noise oltage e OUT f = 1Hz to 1kHz 25 µ RMS = 5, ±1m, f = 12Hz 86 db Turn-On Settling Time t R To =.1% of final value, C OUT = pf 1 µs Supply oltage Range Guaranteed by line-regulation test Quiescent Supply Current I IN µa Change in Supply Current I IN / µa/ 3

4 ELECTRICAL CHARACTERISTICS MAX616, OUT = 2.48 ( = 5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Output oltage Output oltage Temperature C to +7 C 65 TC C -4 C to +85 C µ/ _ Sourcing : I OUT 5.9 I OUT Sinking: -2 IOUT 4. Short to GND 11 OUT Short-Circuit Current I SC Short to IN 12 Output oltage Hysteresis 1hr at +25 C m/ 1hr 13 ppm f=.1hz to 1Hz 22 µ P-P Noise oltage e OUT f= 1Hz to 1kHz 25 µ RMS = 5 ±1m, f = 12Hz 86 db To Turn-On Settling Time t OUT =.1% of final value, R C OUT = pf 1 µs Supply oltage Range Guaranteed by line-regulation test Quiescent Supply Current I IN µa Change in Supply Current I IN / µa/ 4

5 ELECTRICAL CHARACTERISTICS MAX612, OUT = 2. ( = 5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output oltage Output oltage Temperature Noise oltage PARAMETER Dropout oltage (Note 5) OUT Short-Circuit Current Output oltage Hysteresis Turn-On Settling Time Supply oltage Range Quiescent Supply Current Change in Supply Current SYMBOL TC I OUT - I SC e OUT t R I IN I IN / C to +7 C -4 C to +85 C ( +.2) 12.6 Sourcing: I OUT 5 Sinking: -2 I OUT I OUT = 1 Short to GND Short to IN 1hr at +25 C f =.1Hz to 1Hz f = 1Hz to 1kHz CONDITIONS = 5 ±1m, f = 12Hz To =.1% of final value, C OUT = pf Guaranteed by line-regulation test ( +.2) 12.6 MIN TYP MAX UNITS C µ/ m/ m 1hr ppm µ P-P µ RMS db µs µa µa/ 5

6 ELECTRICAL CHARACTERISTICS MAX613, OUT = 3. ( = 5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output oltage Output oltage Temperature Dropout oltage (Note 5) Noise oltage PARAMETER OUT Short-Circuit Current Output oltage Hysteresis Turn-On Settling Time Supply oltage Range Quiescent Supply Current Change in Supply Current SYMBOL TC I OUT - I SC e OUT t R I IN I IN / C to +7 C -4 C to +85 C ( +.2) 12.6 Sourcing: I OUT 5 Sinking: -2 I OUT I OUT = 1 Short to GND Short to IN 1hr at +25 C f =.1Hz to 1Hz f = 1Hz to 1kHz CONDITIONS = 5 ±1m, f = 12Hz To =.1% of final value, C OUT = pf Guaranteed by line-regulation test ( +.2) 12.6 MIN TYP MAX UNITS C µ/ m/ m 1hr ppm µ P-P µ RMS db µs µa µa/ 6

7 ELECTRICAL CHARACTERISTICS MAX614, OUT = 4.96 ( = 5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output oltage Output oltage Temperature Dropout oltage (Note 5) Noise oltage PARAMETER OUT Short-Circuit Current Output oltage Hysteresis Turn-On Settling Time Supply oltage Range Quiescent Supply Current Change in Supply Current SYMBOL TC I OUT - I SC e OUT t R I IN I IN / C to +7 C -4 C to +85 C ( +.2) 12.6 Sourcing: I OUT 5 Sinking: -2 I OUT I OUT = 1 Short to GND Short to IN 1hr at +25 C f =.1Hz to 1Hz f = 1Hz to 1kHz CONDITIONS = 5 ±1m, f = 12Hz To =.1% of final value, C OUT = pf Guaranteed by line-regulation test ( +.2) 12.6 MIN TYP MAX UNITS C µ/ m/ m 1hr ppm µ P-P µ RMS db µs µa µa/ 7

8 ELECTRICAL CHARACTERISTICS MAX617, OUT = 4.5 ( = 5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output oltage Output oltage Temperature Dropout oltage (Note 5) Noise oltage PARAMETER OUT Short-Circuit Current Output oltage Hysteresis Turn-On Settling Time Supply oltage Range Quiescent Supply Current Change in Supply Current SYMBOL TC I OUT - I SC e OUT t R I IN I IN / C to +7 C -4 C to +85 C ( +.2) 12.6 Sourcing: I OUT 5 Sinking: -2 I OUT I OUT = 1 Short to GND Short to IN 1hr at +25 C f =.1Hz to 1Hz f = 1Hz to 1kHz CONDITIONS = 5 ±1m, f = 12Hz To =.1% of final value, C OUT = pf Guaranteed by line-regulation test ( +.2) 12.6 MIN TYP MAX UNITS C µ/ m/ m 1hr ppm µ P-P µ RMS db µs µa µa/ 8

9 ELECTRICAL CHARACTERISTICS MAX615, OUT = 5. ( = 5.5, I OUT =, T A = T MIN to T MAX, unless otherwise noted. Typical values are at.) (Note 1) Output oltage Output oltage Temperature Dropout oltage (Note 5) Noise oltage PARAMETER OUT Short-Circuit Current Output oltage Hysteresis Turn-On Settling Time Supply oltage Range Quiescent Supply Current Change in Supply Current SYMBOL TC I OUT - I SC e OUT t R I IN I IN / C to +7 C -4 C to +85 C ( +.2) 12.6 Sourcing: I OUT 5 Sinking: -2 I OUT I OUT = 1 Short to GND Short to IN 1hr at +25 C f =.1Hz to 1Hz f = 1Hz to 1kHz CONDITIONS = 6 ±1m, f = 12Hz To =.1% of final value, C OUT = pf Guaranteed by line-regulation test ( +.2) 12.6 MIN TYP MAX UNITS C µ/ m/ m 1hr ppm µ P-P µ RMS db µs µa µa/ Note 1: Devices are 1% production tested at and are guaranteed by design from T A = T MIN to T MAX by correlation to sample units characterized over temperature. Note 2: Temperature coefficient is specified by the box method, i.e., the maximum 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 T A = T MIN to T MAX. Note 5: Dropout voltage is the minimum input voltage at which changes.2% from at = 5. ( = 5.5 for MAX615). 9

10 (, unless otherwise noted.) OUTPUT OLTAGE () MAX612 OUTPUT OLTAGE TEMPERATURE DRIFT TYPICAL PARTS TEMPERATURE RISING TEMPERATURE ( C) MAX61/7 TOC1 OUTPUT OLTAGE () MAX615 OUTPUT OLTAGE TEMPERATURE DRIFT Typical Operating Characteristics TYPICAL PARTS TEMPERATURE RISING TEMPERATURE ( C) MAX61/7 TOC2 SUPPLY CURRENT (µa) SUPPLY CURRENT vs. INPUT OLTAGE INPUT OLTAGE () MAX61/7 TOC3 SUPPLY CURRENT (µa) MAX611 SUPPLY CURRENT vs. TEMPERATURE = 12.5 = 7.5 = 2.5 = TEMPERATURE ( C) MAX61/7 toc4 DROPOUT OLTAGE (m) MAX612 DROPOUT OLTAGE vs. SOURCE CURRENT T A = -4 C SOURCE CURRENT () MAX61/7 TOC5 DROPOUT OLTAGE (m) MAX612 DROPOUT OLTAGE vs. SINK CURRENT T A = -4 C SINK CURRENT () MAX61/7 TOC6 DROPOUT OLTAGE (m) MAX615 DROPOUT OLTAGE vs. SOURCE CURRENT T A = -4 C SOURCE CURRENT () MAX61/7 TOC7 DROPOUT OLTAGE (m) MAX615 DROPOUT OLTAGE vs. SINK CURRENT T A = -4 C SINK CURRENT () MAX61/7 TOC8 OUTPUT OLTAGE CHANGE (m) SINK T A = -4 C MAX612 LOAD REGULATION SOURCE LOAD CURRENT () T A = -4 C MAX61/7 TOC9 1

11 (, unless otherwise noted.) OUTPUT OLTAGE CHANGE (m) SINK T A = -4 C MAX615 LOAD REGULATION SOURCE T A = -4 C LOAD CURRENT () MAX61/7 TOC1 OUTPUT OLTAGE CHANGE (m) Typical Operating Characteristics (continued) MAX612 LINE REGULATION T A = -4 C INPUT OLTAGE () MAX61/7 TOC11 OUTPUT OLTAGE CHANGE (m) MAX615 LINE REGULATION T A = -4 C INPUT OLTAGE () MAX61/7 TOC MAX612 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX61/7 TOC MAX615 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY MAX61/7 TOC14 2m/div MAX611 LINE-TRANSIENT RESPONSE MAX61/7 TOC15 6 PSRR (db) PSRR (db) m/div FREQUENCY (khz) FREQUENCY (khz) 1µs/div MAX612 LINE-TRANSIENT RESPONSE MAX615 LINE-TRANSIENT RESPONSE OUTPUT IMPEDANCE vs. FREQUENCY 2m/div 1m/div MAX61/7 TOC16 2m/div 5m/div MAX61/7 TOC17 OUTPUT IMPEDANCE (Ω) MAX61/7 TOC18 1µs/div 1µs/div k 1k 1k 1M FREQUENCY (Hz) 11

12 (, unless otherwise noted.) 2m/div I OUT 5/div MAX611 LOAD-TRANSIENT RESPONSE (C LOAD = ) 2µs/div Typical Operating Characteristics (continued) MAX61/7 TOC m/div I OUT 5/div MAX612 LOAD-TRANSIENT RESPONSE (C LOAD = ) 2µs/div MAX61/7 TOC2 5-2 MAX615 LOAD-TRANSIENT RESPONSE (C LOAD = ) MAX612 LOAD-TRANSIENT RESPONSE (C LOAD = 1µF) 2m/div MAX61/7 TOC21 2/div MAX61/7 TOC22 I OUT 5/div 5-2 m/div 2µs/div 2µs/div MAX615 LOAD-TRANSIENT RESPONSE (C LOAD = 1µF) MAX611 TURN-ON TRANSIENT 5/div MAX61/7 TOC23 2/div MAX61/7 TOC24 m/div m/div 1µs/div 1µs/div 12

13 (, unless otherwise noted.) 2/div 2/div MAX615 TURN-ON TRANSIENT 1µs/div MAX61/7 TOC25 2µ/div Typical Operating Characteristics (continued) MAX612.1Hz TO 1Hz OUTPUT NOISE 1s/div MAX61/7 TOC26 2µ/div MAX615.1Hz TO 1Hz OUTPUT NOISE 1s/div MAX61/7 TOC27 PIN NAME 1 IN Input oltage 2 OUT Reference Output 3 GND Ground Pin Description FUNCTION Applications Information Input Bypassing For the best line-transient performance, decouple the input with a.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 MAX61 family do not require an output capacitance for frequency stability. They are stable for any capacitive load when sourcing less than 2µA. When sourcing greater than 2µA, the output may become unstable with capacitive loads between.5nf and nf. In applications where the load or the supply can experience step changes, an output capacitor reduces the amount of overshoot (undershoot) and improves the circuit s transient response. Many applications do not require an external capacitor, and the MAX61 family can offer a significant advantage in these applications when board space is critical. Supply Current The quiescent supply current of the series-mode MAX61 family is typically 9µA and is virtually independent of the supply voltage, with only an 8µA/ (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. In the MAX61 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 4µA beyond the nominal supply current. The input voltage source must be capable of providing this current to ensure reliable turn-on. Output oltage Hysteresis Output voltage hysteresis is the change of output voltage at before and after the device is d 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 13ppm. 13

14 Turn-On Time These devices typically turn on and settle to within.1% of their final value in µs to 3µs. The turn-on can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load. TOP IEW TRANSISTOR COUNT: 117 IN OUT 1 2 SOT23 Pin Configuration 3 GND Chip Information 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 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. 14 Maxim Integrated Products, 12 San Gabriel Drive, Sunnyvale, CA Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

Precision, Micropower, Low-Dropout, High- Output-Current, SO-8 Voltage References

19-165; Rev ; 7/ Precision, Micropower, Low-Dropout, High- General Description The MAX6167 are precision, low-dropout, micropower voltage references. These three-terminal devices operate with an input