General Description Ideal for space critical applications, the LM4040 and LM4041 precision voltage references are available in the sub-minia- ture (8mm x 1.3mm) SOT-23 surface-mount package, the SOQ-8 surface-mount package, or the TO-92 package. The LM4040 is the available in several fixed reverse break- down voltages: 2.500V, 4.096V, 5.000V, 8.192V, and 10.000V. The LM4041 is available with a fixed 1.225V or an adjustable reverse breakdown voltage. The LM4040 and LM4041s advanced design eliminates the need for an external stabilizing capacitor while ensuring stability with any capacitive load, making them easy to use. The minimum operating current increases from 60pA for the LM4041-1.2 to 100A for the LM4040-10.0. LM4040 ver- sions have a maximum operating current of 15mA. LM4041 versions have a maximum operating current of 12mA. The LM4040 and LM4041 utilizes zener-zap reverse break- down voltage trim during wafer sort to ensure that the prime parts have an accuracy of better than +0.1% (A grade) at 25C. Bandgap reference temperature drift curvature correc- tion and low dynamic impedance ensure stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents. LM4040/4041 Precision Micropower Shunt Voltage Reference Preliminary Information Se Features Small Package: SOT-23, TO-92, and SO-8 * No output capacitor required * Tolerates capacitive loads Fixed reverse breakdown voltages of 1.225, 2.500V, 4.096V, 5.000V, 8.192V, and 10.000V Adjustable reverse breakdown version * Contact Micrel for parts with extended temperature range. Key Specifications * Output voltage tolerance (A grade, 25C)... 0.1% (max) * Low output noise (10Hz to 100HZz) 35uVams (typ) 20UVams (typ) GOLA to 15mA 60uA to 12mMA * Industrial temperature range ... . ~40C to +85C * Low temperature coefficient ........0.... 100ppm/C (max) Applications Battery-Powered Equipment Data Acquisition Systems Instrumentation Process Control Energy Management Product Testing Automotive Electronics Precision Audio Components Typical Applications V5 Re Shloth i R a Vo M4040 LM4041 lo Figure 1. LM4040, LM4041 Fixed Shunt Regulator Application Vs Rg Ve Vo Ry Vg = 1.225 (RAR, + 1) LM4041 Adjustable R; Figure 2. LM4041 Adjustable Shunt Regulator Application Recommended Parts* (Ordering Information) LM4040CIM-2.5 2.500V, 40.5% LM4040DIM-5.0 S.000V, 41.0% LM4041CIM3-1.2 T&R 1.225V, 40.5% LM4040DIM-2.5 2.500V, 41.0% LM4040DIM3-5.0 T&Rt 5.000V, +1.0% LM4041DIM3-1.2 T&Rt 1.225V, 41.0% LM4040CIM3-2.5 T&R! 2.500V, 40.5% LM4040DIZ-5.0 5.000V, #1.0% LM4041DIZ-1.2 1.225V, 11.0% LM4040DIM3-2.5 T&Rt 2.500V, +1.0% LM4041CIM3-ADJ T&Rt 1.24-10V, 40.5% LM4040CIZ-2.5 2.500V, 10.5% LM4041DIM3-ADJ T&Rt 1.24-70V, +1.0% LM4040DIZ-2.5 2.500V, 41.0% LM4041DIZ-ADJ 1.24-10V, 11.0% Contact factory for availability of other part numbers. tM3 (SOT-23) package available in Tape & Reel only. 10-2LM4040/4041 Pin Configuration 2 + Es bt -O 3 Pin 1 must float or be connected to pin 3. Fixed Version SOT-23 (M3) Package Top View ree eas +O Adjustable Version SOT-23 (M3) Package Top View Fixed Version SO-8 (M) Package Top View Adjustable Version SO-8 (M) Package Top View Ordering Informationt (Expanded Version) Micrel Fixed Version TO-92 (Z) Package Bottom View FB + ~ 3 2 1 Adjustable Version TO-92 (Z) Package Bottom View SOT-23 Package Markings (Example: R4A) tT available only in M3 and Z packages + M3 (SOT-23) available in Tape and Reel only. Add suffix T&R. Quantity = 3000/reel. Part Number Voltage Accuracy, Part Number Voltage Accuracy, Temp. Coefficient Temp. Coefficient LM4040AI*-2.5 2.500V +0.1%, 100ppm/C LM4040CI*-8.2 8.192V 40.5%, 100ppmv/C LM4040BI*-2.5 2.500V +0.2%, 100ppm/C LM4040DI"-8.2 8.192V +1.0%, 150ppm/C LM4040CI*-2.5 2.500V 40.5%, 100ppm/C LM4040DI"-2.5 2.500V +1.0%, 150ppm/C LM4040AI*-10.0 10.00V +0.1%, 100ppm/C LM4040E1*-2.5t 2.500V +2.0%, 150ppm/C LM4040BI*-10.0 10.00V 40.2%, 100ppm/C LM4040C}*-10.0 10.00V 10.5%, 100ppm/C LM4040AI"-4.1 4.096V +0.1%, 100ppm/C LM4040DI*-10.0 10.00V 1.0%, 150ppm/C LM4040BI*-4.1 4.096V +0.2%, 100ppm/C LM4040CI*-4.1 4.096V +0.5%, 100ppm/C LM4041Al*-1.2 1.225V +0.1%, 100ppm/C LM4040DI*-4.1 4.096V +1,0%, 150ppm/C LM4041Bl*-1.2 1.225V 40.2%, 100ppm/C LM4041CI*-1.2 1.225V +0.5%, 100ppm/C LM4040AI"-5.0 5.000V +0.1%, 100ppm/C LM4041D1*-1.2 1.225V +1.0%, 150ppm/C LM4040BI*-5.0 5.000V 40.2%, 100ppm/C LM4041E\*-1,.2T 1.225V +2.0%, 150ppm/C LM4040CI*-5.0 5.000V +0.5%, 100ppm/C LM4040DI*-5.0 5.000V 1.0%, 150ppm/C LM4041Cl*-ADJ 1.24V to 10V +0,.5%, 100ppm/?C LM4041DI*-ADJ 1.24V to 10V +1.0%, 150ppm/C LM4040AI*-8.2 8.192V 40.1%, 100ppm/C Refer to Recommended Parts list for most common part numbers. LM4040BI"-8.2 8.192V 0.2%, 100ppm/C S08 MO sone De tO ae an numbers. Example Field Code Exampie Field Code Example Field Code R__ ist Character AR = Reference _4_ 2nd Character 1 = 1.225V _A 3rd Character A=+0.1% | ; 2 = 2.500V B=+0.2% Explanation: The SOT-23 package size does 4=4,096V C=+0.5% not allow conventional part number markings, 5 -5.000V D=1.0% therefore a 3-character coding system is used ~ ~ a . . for identification. See note for 3rd character. 46 eee B= 42.0% Example: R4A represents Reference, 4.096V, A =A div fabl Note: If 3rd character is omitted, container will 40.1% (LM4040AIM3-4.1) = Adjustable} indicate tolerance. 10-3LM4040/4041 Micrel Functional Diagram Functional Diagram LM4040, LM4041 Fixed LM4041 Adjustable + 2 a : Ver q FB oh t 4 . Absolute Maximum Ratings Operating Ratings (Notes 1 & 2) Reverse CUITONE ......e cece ceccsecsssesecesseeeconsesctseteneesenses 20mA = Temperature Range Forward Current ....ccccccccscssccsseseesesceeescsesevsescstsetaveeceess 10mA (Thingy S Ta S Tax) ceececererteeetteeeees 40C <= Ty, $ +85C Maximum Output Voltage Reverse Current LM4041-Adjustable .o....0.0.ccecccceeeccseeeseesesteesessceseseseaee 15V LM4040-2.5 oo cette esteeeeeeeeeeeeeee 60nA to 15mA Power Dissipation (T, = 25C) (Note 2) LM4040-4.1 .. + BBLA to 15mA M PaCkaGe o.ecscccescecescssssesssseeseerssseescsnescestneeseesese LM4040-5.0 .. + TAA to 15mA M3 Package ........... LM4040-8.2 oe. eecece teeter eeree eens 91pA to 15mA Z Package LM4040-10.0 .... .. 100pA to 15mA ee 5 LM4041-1.2 ooo cececeeeesteeteettereteereeeeess GOLA to 12mMA Storage Temperature 0.00... ceeceseeeeeeee ~65C to +150C LM4041-ADJ BOA to 12mA Lead Temperature Output Voltage Range M and M3 Packages Vapor phase (60 S@CONdS) ..-scccc-scsssescsseeeee 4215C LM4041-ADS oo. ec ccec eer rrneeeetenaee 1.24V to 10V Infrared (15 SeCONdS) ...... eee eee teeeeeeeeteetees +220C Z Package Soldering (10 seconds) ...........ececeeeseeeereeeeee +260C ESD Susceptibility Human Body Model (Note 3)... eee 2kV Machine Model (Note 3)... cece reece eee 200V LM4040 and LM4041 Applications Information The LM4040 and LM4041 have been designed for stable operation without the need of an external capacitor con- nected between the (+) and () pins. If a bypass capacitor is used, the references remain stable. SOT-23 Versions LM4040-x.x and LM4041-1.2s in the SOT-23 packages have a parasitic Schottky diode between pin 3 () and pin 1 (die attach interface connect). Pin 1 of the SOT-23 package must float or be connected to pin 3. LM4041-ADJs use pin 1 as the (-) output. Conventional Shunt Regulator In a conventional shunt regulator application (see Figure 1), an external series resistor (Rg) is connected between the supply voltage and the LM4040-x.x orLM4041-1.2 reference. Rg determines the current that flows through the load (I, ) and the reference (Iq). Since load current and supply voltage may vary, Rg should be small enough to supply at least the minimum acceptable |, to the reference even when the supply voltage is at its minimum and the load current is at its (continued following LM4041 typical characteristics) 10-4M4040/404 1 LM4040-2.5 Electrical Characteristics Boldface limits apply for T, = Ty = Try tO Trax; all other limits T, = T, = 25C. The grades A, B, C, D, and E designate initial Reverse Breakdown Voltage tolerance of +0.1%, +0.2%, +0.5%, + 1.0%, and +2.0 respectively. Micrel LM4040AIM | LM4040B1M | LM4040CIM LM4040AI1M3 | LM4040BIM3 | LM4040CIM3 Symbol | Parameter Conditions Typical LM4040AIZ | LM4040BIZ | LM4040CIZ Units (Note 4) Limits Limits Limits (Limit) (Note 5) (Note 5) (Note 5) Va Reverse Breakdown Voltage 1q = 100HA 2.500 V Reverse Breakdown Voltage Ip = 100nA +2.5 +5.0 +12 mV (max) Tolerance +19 121 +29 mV (max) lamin Minimum Operating Current 45 pA 60 60 60 pA (max) 65 65 65 yA (max) AV,/AT | Average Reverse Breakdown |_ = 10mA 20 ppm/c Voltage Temperature Ip=imA 15 100 100 100 ppm/C (max) Coefficient In = 100pA 15 ppm/?C (max) AV,/Alp | Reverse Breakdown Voltage lamin Sta IMA 0.3 mV Change with Operating 0.8 0.8 0.8 mV (max) Current Change 1.0 1.0 1.0 mV (max) ImA < Ip 15mA 25 mV 0.6 0.6 0.6 mvV (max) 8.0 8.0 8.0 mv (max) ZR Reverse Dynamic \mpedance I; = 1mA, f = 120Hz 0.3 Q Ing = 0.1 Ip 0.8 0.8 0.9 Q (max) en Wideband Noise Ip = 100pA 10Hz < f < 10kHz 35 uVams AVR Reverse Breakdown Voltage t= 1000hrs Long Term Stability T= 25C +0.1C 120 ppm Iq = 100pA LM4040DIM LM4040DIM3 | LM4040EIM3 Symbol | Parameter Conditions Typical LM4040DIZ | LM4040EIZ Units (Note 4) Limits Limits (Limit) (Note 5) (Note 5) Va Reverse Breakdown Voltage IR = 100pA 2.500 Vv Reverse Breakdown Voltage Iq = 100pA +25 +50 mV (max) Tolerance +49 74 mV (max) Jamin Minimum Operating Current 45 HA 65 65 nA (max) 70 70 HA (max) AVp/AT | Average Reverse Breakdown Ip = 10MA 20 ppm/G Voltage Temperature Inp=1mA 15 150 150 ppm/C (max) Coefficient Ip = 100pA 15 ppm/C (max) AV,/Al, | Reverse Breakdown Voltage lamin <!_ IMA 0.3 mv Change with Operating 1.0 1.0 mV (max) Current Change 2 1.2 mV (max) 1imA <1, 15mA 2.5 mV 3.0 8.0 mV (max} 10.0 10.0 mV (max) ZR Reverse Dynamic Impedance In = 1mA, f = 120Hz 0.3 Q lac = 0.1 In 1.1 1.4 Q (max) en Wideband Noise Ip = 100nA VOHz < f < 10kHz 35 Lams AVe Reverse Breakdown Voltage t= 1000hrs Long Term Stability T = 25C +0.1C 120 pom Ip = 100pA 10-5LM4040/4041 LM4040-4.1 Electrical Characteristics Boldface limits apply for T, = Ty = Tyjy to Trax: all other limits T, = T, = 25C. The grades A, B, C, and D designate initial Reverse Breakdown Voltage tolerance of +0.1%, +0.2%, +0.5%, and + 1.0% respectively. Micrel LM4040AIM LM4040BIM LM4040AIM3 LM4040BIM3 Symbol | Parameter Conditions Typical LM4040AIZ LM4040BIZ Units (Note 4) Limits Limits (Limit) (Note 5) (Note 5) Ve Reverse Breakdown Voltage Ip = 100A 4.096 v Reverse Breakdown Voltage Ip = 100uA +41 +8.2 mV (max) Tolerance +31 135 mV (max) laMIN Minimum Operating Current 50 pA 68 68 BA (max) 73 73 pA (max) AVp/AT | Average Reverse Breakdown I_ = 10MA 30 ppm/C Voltage Temperature Iq = 1MA 20 100 100 ppm/C (max) Coefficient tq = 100pA 20 ppm/C (max) AVp/Aly | Reverse Breakdown Voltage lamin < l_ IMA 0.5 mv Change with Operating 0.9 0.9 mv (max) Current Change 1.2 1.2 mV (max) IMA < Ip 15MA 3.0 mV 7.0 7.0 mV (max) 10.0 10.0 mV (max) Zp Reverse Dynamic Impedance I_ = 1mA, f = 120Hz 0.5 Q lac = 0.1 Ip 1.0 1.0 Q (max) en Wideband Noise Ip = 100LA 10Hz < f < 10kHz 80 uVems AVa Reverse Breakdown Voltage t= 1000hrs Long Term Stability T = 25C +0.1C 120 ppm Iq = 100pA LM4040CIM LM4040DIM LM4040CIM3 LM4040DIM3 Symbol | Parameter Conditions Typical LM4040CIZ LM4040DIZ Units (Note 4) Limits Limits (Limits) (Note 5) (Note 5) Ve Reverse Breakdown Voltage Ig = 100nA 4.096 v Reverse Breakdown Voltage Iq = 100A +20 +41 mV (max) Tolerance +47 +81 mV (max) lawn Minimum Operating Current 50 A 68 73 pA (max) 73 78 pA (max) AVp/AT | Average Reverse Breakdown Ip = 10mA 30 ppm/c Voltage Temperature In; = 1mA 20 100 150 ppm/C (max) Coefficient Ip = 100pA 20 ppm/c (max) AVp/Al, | Reverse Breakdown Voltage lamin <}_ imA 0.5 mV Change with Operating 0.9 1.2 mV (max) Current Change 1.2 1.5 mv (max) 1mA <I, 15mA 3.0 mV 7.0 9.0 mv (max) 10.0 13.0 mV (max) Zp Reverse Dynamic Impedance In = 1MA, f = 120Hz 0.5 Q lag = 0.1 tp 1.0 1.3 Q (max) ey Wideband Noise Ip = 100nA 10Hz <f< 10kHz 80 uVams AVA Reverse Breakdown Voltage t= 1000hrs Long Term Stability T = 28C +0.1C 120 pom I_ = 100A 10-6LM4040/4041 LM4040-5.0 Electrical Characteristics Boldface limits apply for T, = T, = Tyjy to Tyay: all other limits T, = T, = 25C. The grades A, B, C, and D designate initial Reverse Breakdown Voltage tolerance of +0.1%, +0.2%, 40.5%, and + 1.0% respectively. Micrel LM4040AIM LM4040BIM LM4040AIM3 LM4040BIM3 Symbol | Parameter Conditions Typical LM4040AIZ LM4040BIZ Units (Note 4) Limits Limits (Limit) (Note 5) (Note 5) VR Reverse Breakdown Voltage I_ = 100HA 5.000 Vv Reverse Breakdown Voltage Ip = 100A +5.0 +10 mvV (max) Tolerance +38 +43 mV (max) lana Minimum Operating Current 54 uA 74 74 MA (max) 80 80 LA (max) AV,/AT | Average Reverse Breakdown Ip = 10MA 30 ppm/C Voltage Temperature Ig = 1MA 20 100 100 ppm/C (max) Coefficient ly = 100HA 20 ppm/*C (max) AVP /Alp | Reverse Breakdown Voltage lamin Sly IMA 0.5 mV Change with Operating 1.0 1.0 mV (max} Current Change 1.4 1.4 mV (max) imA < lp 15mA 3.5 mV 8.0 8.0 mV (max) 12.0 12.0 mV (max) Za Reverse Dynamic Impedance In = 1mA, f = 120Hz 0.5 Q lag = 0.1 Ip V1 W1 Q (max) ey Wideband Noise Ip = 100nA 10Hz < f < 10kHz 80 Weans AVA Reverse Breakdown Voltage t = 1000hrs Long Term Stability T= 25C 0.1C 40 ppm l_ = 100A LM4040CIM LM4040DIM LM4040CIM3 LM4040DIM3 Symbol | Parameter Conditions Typical LM4040CIZ LM4040DIZ Units (Note 4) Limits Limits (Limits) (Note 5) (Note 5) VR Reverse Breakdown Voltage {pq = 100pA 5.000 Vv Reverse Breakdown Voitage Ip = 100nA +25 +50 mV (max) Tolerance +58 +99 mv (max) lamin Minimum Operating Current 54 hA 74 79 uA (max) 80 85 uA (max) AVp/AT | Average Reverse Breakdown Ip = 10mMA 30 ppm/C Voltage Temperature Ip =1mA 20 100 150 ppm/C (max) Coefficient Ip = 100pA 20 ppm/C (max) AVp/Al, | Reverse Breakdown Voltage lanun S Ip IMA 0.5 mV Change with Operating 1.0 1.3 mV (max) Current Change 1.3 1.8 mV (max) 1MA <I, 15mA 3.5 mV 8.0 10.0 mV (max) 12.0 15.0 m (max) Zp Reverse Dynamic Impedance In = 1MA, f= 120Hz 0.5 Q ag = O11, 11 1.5 Q (max) en Wideband Noise Ip = 100nA 10Hz < f < 10kHz 80 uVAMs AVR Reverse Breakdown Voltage t= 1000hrs Long Term Stability T = 28C 40.1C 120 ppm Ip = 100pA 10-7LM4040/4041 Micrel LM4040-8.2 Electrical Characteristics Boldface limits apply for T, = Ty = Traiy tO Tyyay: a! other limits T, = T, = 25C. The grades A, B, C, and D designate initia! Reverse Breakdown Voitage tolerance of +0.1%, +0.2%, +0.5%, and + 1.0% respectively. LM4040AIM LM4040BIM LM4040AIM3 LM4040BIM3 Symbol | Parameter Conditions Typical LM4040AIZ LM4040BIZ Units {Note 4) Limits Limits (Limit) (Note 5) (Note 5) Ve Reverse Breakdown Voltage Ip = 150nA 8.192 Vv Reverse Breakdown Voltage In = 150pA +8.2 +16 mV (max) Tolerance +61 +70 mV (max) lRMIN Minimum Operating Current 67 HA 91 91 LA (max) 95 95 MA (max) AVp/AT | Average Reverse Breakdown Ip = 10mMA 40 ppm/C Voltage Temperature I; = ima 20 100 100 ppm/C (max) Coefficient IR = 150pA 20 ppm/C (max) AV,/Al, | Reverse Breakdown Voltage lpMIN Sq IMA 0.6 mV Change with Operating 1.3 1.3 mV (max) Current Change 2.5 2.5 mV (max) 1mA < Ip 15mA 7.0 mV 10.0 10.0 mv (max) 18.0 18.0 mV (max) Zp Reverse Dynamic Impedance Ip = IMA, f = 120HZ 0.6 Q lag = 9.1 Ip 15 15 Q (max) en Wideband Noise In = 150nA 10Hz < f $ 10kHz 130 UVaws AVR Reverse Breakdown Voltage t= 1000hrs Long Term Stability T= 25C +0.1C 120 ppm Ip = 150pA LM4040CIM LM4040DIM LM4040CIM3 LM4040DIM3 Symbol | Parameter Conditions Typical LM4040CIZ LM4040DIZ Units (Note 4) Limits Limits (Limits) (Note 5) (Note 5) Ve Reverse Breakdown Voltage Ip = 150nA 8.192 Vv Reverse Breakdown Voltage tg = 150pA +44 +82 mV (max) Tolerance 194 +162 mV (max) laMIN Minimum Operating Current 67 pA 91 96 pA (max) 95 100 HA (max) AVP/AT | Average Reverse Breakdown Ip = 10mMA 40 pom/C Voltage Temperature Ip = 1mA 20 100 150 ppm/C (max) Coefficient In = 150pA 20 ppm/C (max) AVp/Al_ | Reverse Breakdown Voltage lamin lq 1mA 0.6 mV Change with Operating 1.3 1.7 mV (max) Current Change 25 3.0 mV (max) 1mA <I, 15MA 7.0 mV 10.0 15.0 mV (max) 18.0 24.0 mV (max) ZR Reverse Dynamic Impedance In = 1mMA, f = 120Hz 0.6 Q Ing = 0.1 Ip 1.6 1.9 Q (max) en Wideband Noise fq = 150pnA 10Hz < fs 10kHz 130 uVems AVe Reverse Breakdown Voltage t= 1000hrs Long Term Stability T = 25C +0.1C 120 ppm lg = 150A 10-8LM4040/4041 LM4040-10.0 Electrical Characteristics Boldface limits apply for T, = Ty = Tyjy to Tray: all other limits T, = T, = 25C. The grades A, B, C, and D designate initial Reverse Breakdown Voltage tolerance of +0.1%, +0.2%, +0.5%, and + 1.0% respectively. Micrel LM4040AIM LM4040BIM LM4040AIM3 LM4040B1M3 Symbol! | Parameter Conditions Typical LM4040AIZ LM4040BIZ Units (Note 4) Limits Limits (Limit) (Note 5) (Note 5) VR Reverse Breakdown Voltage Ip = 150nA 10.00 v Reverse Breakdown Voltage lq = 150pA +10 +20 mvV (max) Tolerance +75 +85 mV (max) lamin Minimum Operating Current 75 pA 100 100 pA (max) 103 103 HA (max) AVP/AT | Average Reverse Breakdown I_ = 10MA 40 ppm/?c Voltage Temperature In = 1MA 20 100 100 ppm/C (max) Coefficient Ip = 150pA 20 ppm/G (max) AVp/Al_ | Reverse Breakdown Voltage lamin S'_ IMA 0.8 mV Change with Operating 1.5 1.6 mv (max) Current Change 3.5 3.5 mV (max) 1ImA <I, 15mA 8.0 mv 12.0 12.0 mV (max) 23.0 23.0 mV (max) ZR Reverse Dynamic Impedance In = 1mA, f = 120Hz 0.7 Q Inc = 0.1 In 17 17 Q (max) en Wideband Noise Ip = 150pA 10Hz < f s 10kHz 180 BVams AVR Reverse Breakdown Voitage t= 1000hrs Long Term Stability T = 25C +0.1C 120 ppm Ip = 150nA LM4040CIM LM4040DIM LM4040CIM3 LM4040DIM3 Symbol | Parameter Conditions Typical LM4040CIZ LM4040DIZ Units (Note 4) Limits Limits (Limits) (Note 5) (Note 5) Va Reverse Breakdown Voltage I_ = 150HA 10.00 Vv Reverse Breakdown Voltage Ip = 150pA +50 +100 mV (max) Tolerance +115 +198 mv (max) lamin Minimum Operating Current 75 pA 100 110 pA (max) 103 113 BA (max) AVP/AT | Average Reverse Breakdown In = 10MA 40 ppm/C +] 0 Voltage Temperature Ip=tmA 20 100 150 ppm/C (max) Coefficient Iq = 150A 20 ppm/C (max) AV,/Al, | Reverse Breakdown Voltage lRMIN <q IMA 0.8 mV Change with Operating 1.5 2.0 mv (max) Current Change 3.5 40 mV (max) mA < tp 15mA 8.0 mV 12.0 18.0 mV (max) 23.0 29.0 mv (max) Za Reverse Dynamic Impedance | I, = 1mA, f= 120Hz 0.7 Q Ing = 0.1 Ip 17 2.3 Q (max) ey Wideband Noise IR = 150A 10Hz < f < 10kHz 180 uVaMs AVa Reverse Breakdown Voltage t = 1000hrs Long Term Stability T = 25C +0.1C 120 ppm Ip = 150nA 10-9LM4040/4041 Micrel LM4040 Typical Characteristics Temperature Drift for Different Output Impedance Output Impedance Average Temperature Coefficient vs. Frequency vs. Frequency +0.5 1k IR= | 100 YA ky Ia = 150A R= I_MIN + b . l= 1mA 40.4 R Hl y= 25C, Alp =0.4 | *s | T= 25, aly = ly +03 = 100 ~ Is | X02 2 @ 100 % C.=0 g+0.1 3 28 3 oc =a = 10 Z 10}+-Vp, = 10V C= IE 5 -0.1 wl 9 15V, TANTALUM yw 2.5V _, = / > 0.2 = 4 i = 1 4 MN. -0.3 51 iC SS -0.4 a -0.5 0.1 0.1 L 40 -20 0 20 40 60 80 100 100 the Ueney ter 1M 100. 1k 10k 100k 1M TEMPERATURE (C) a (Ha) FREQUENCY (Hz) Reverse Characteristics and Noise Voltage Minimum Operating Current vs. Frequency 120 = 200pA g 100 Ty = 25C & ~ Gj 80 N Vea = 10V ia $ NV > 3 60 S lu 2 40 3 wi Ty = 25C 2 a 20 ce 0 0 2 4 6 8 10 1 10 100 1k 10k 100k REVERSE VOLTAGE (V) FREQUENCY (Hz) Rs LM4040 Vp 1Hz rate Test Circuit LM4040-2.5 Rg = 30k LM4040-5.0 Rg = 30k LM4040-10.0 Rg = 30k = 5 = 10 = = 0 0 = 6 6 = 4 s 4 = > 2 st 2 > 0 0 0 20 40 60 = 80 9 100 200 300 400 0 100 200 300 400 RESPONSE TIME (us) RESPONSE TIME (us} RESPONSE TIME (us) 10-10LM4040/4041 Micrel LM4041-1.2 Electrical Characteristics Boldface limits apply for T, = Ty = Tyyy to Tray: all other limits Ty = T, = 25C. The grades A, B, C, D, and E designate initial + 1.0%, and +2.0 respectively. Reverse Breakdown Voltage tolerance of +0.1%, +0.2%, +0.5%, LM4041AIM | LM4041BIM | LM4041CIM LM4041AIM3 | LM4041BIM3 | LM4041CIM3 Symbol | Parameter Conditions Typical LM4041AIZ | LM4041BIZ | LM4041CIZ Units (Note 4) Limits Limits Limits (Limit) (Note 5) (Note 5) (Note 5) VR Reverse Breakdown Voltage Iq = 100pA 1.225 Vv Reverse Breakdown Voltage Iq = 100A +1.2 +2.4 +6 mV (max) Tolerance 19.2 410.4 +14 mV (max) lRMIN Minimum Operating Current 45 pA 60 60 60 BA (max) 65 65 65 pA (max) AV,/AT | Average Reverse Breakdown In = 10mA 20 ppm/C Voltage Temperature Ip = 1mA 15 +100 +100 +100 ppm/C (max) Coefficient Ip = 100nA 15 ppm/C (max) AV, /Alp | Reverse Breakdown Voltage lamin S lp IMA 0.7 mV Change with Operating 1.5 1.5 1.5 mV (max) Current Change 2.0 2.0 2.0 mV (max) 1mA < Ip 15mA 4.0 mV 6.0 6.0 6.0 mV (max) 8.0 8.0 8.0 mV (max) Za Raverse Dynamic Impedance \q = 1mA, f = 120Hz 0.5 Q lac = 0.1 Ia 1.5 1.5 15 Q (max) en Wideband Noise Ip = 100LA JOH2 <f < 10kHz 20 uVems AVA Reverse Breakdown Voltage t = 1000hrs Long Term Stability T = 25C +0.1C 120 ppm Ig = 100HA LM4041DIM LM4041DIM3 | LM4041EIM3 Symbol | Parameter Conditions Typical LM4041DIZ | LM4041EIZ Units (Note 4) Limits Limits (Limit) (Note 5) (Note 5) VR Reverse Breakdown Voltage Iq = 100pA 1.225 Vv Reverse Breakdown Voltage fa = 100HA 412 +25 mv (max) Tolerance +24 +36 mV (max) laMIN Minimum Operating Current 45 BA 65 65 BA (max) 70 70 BA (max) AVP/AT | Average Reverse Breakdown I_ = 10mMA 20 ppm/C Voltage Temperature {g=1mA 15 +150 +150 ppm/C (max) Coefficient 1 = 100A 15 ppm/C (max) AVP /Al, | Reverse Breakdown Voitage lamin <l_ IMA 0.3 mv Change with Operating 2.0 2.0 mV (max) Current Change 2.5 2.5 mV (max) 1mA < Ip 15mA 2.5 mV 8.0 8.0 mV (max) 10.0 10.0 mV (max) Zp Reverse Dynamic Impedance In = 1mA, f = 120Hz 0.3 Q lag = 0-1 Iq 2.0 2.0 Q (max) ey Wideband Noise In = 100nA 10Hz < f < 10kHz 35 LVams AVR Reverse Breakdown Voltage t= 1000hrs Long Term Stability T= 25C +0.1C 120 ppm 1p = 100pA 10-14LM4040/4041 Micrel LM4041-Adjustable Electrical Characteristics Boldface limits apply for T, = Ty = Try to Tyax: all other limits T, = 25C unless otherwise specified (SOT-23, see Note 7), lamin SI < 12MA, Veer < Voyz < 10V. The grades C and D designate initial Reverse Breakdown Voltage tolerance of 0.5% and +1%, respectively for Voy = SV. LM4041CIM LM4041DIM LM4041CiM3 LM4041DIM3 Symbol | Parameter Conditions Typical LM4041ClZ LM4041DIZ Units (Note 4) Limits Limits (Limit) (Note 5) (Note 5) VaeF Reference Breakdown Voltage | I, = 100pA 1.233 v Vout = 5V Reference Breakdown Voltage | !, = 100uA +6.2 +12 mV (max) Tolerance (Note 8) +14 124 mv (max) lamin Minimum Operating Current 45 pA 60 65 pA (max) 65 70 HA (max) AVreF Reference Voltage lamin < ip IMA 0.7 mv Alp Change with Operating SOT-23: 1.5 2.0 mV (max) Current Change Vout 2 1.6V 2.0 2.5 mV (max} (Note 7) 1mA <I, 15mMA 2 mV SOT-23: 4 6 mV (max) Vout 2 1.6V 6 8 mV (max) (Note 7) AVeer Reference Voltage Change Ip =1mMA -1.3 mv IN with Output Voltage Change -2.0 ~2.5 mV/V (max) 2.5 -3.0 mvV/V (max) lB Feedback Current 60 nA 100 150 nA (max) 120 200 nA (max) AVrer Average Reference Vout = 5V /AT Voltage Temperature Iq = 10mA 20 ppm/c Coefficient Ip = 1mMA 15 +100 +150 ppm/C (max) (Note 8) ip = 100pA 15 ppm/C (max) Zout Dynamic Output impedance In = 1MA, f = 120HZ lng = O.1 Ip Vout = Vrer 0.3 2 out = 1 2 Q (max) en Wideband Noise Ip = 100pA 1OHz <f < 10kHz 20 tVems AVaer Reference Voltage t= 1000hrs Long Term Stability T = 25C +0.1C 120 ppm Iq = 100HA 10-12LM4040/4041 Micrel LM4040 and LM4041 Electrical Characteristic Notes Note 1 Note 2 Note 3 Note 4 Note 5 Note 6 Note 7 Note 8 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not quarantee specific performance limits. For guaranteed specification and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only tor the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. The maximum power dissipation must be derated at elevated temperatures and is dictated by T yyay (maximum junction temperature), Oy, {junction to ambient thermal resistance), and T, (ambient temperature). The maximum allowable power dissipation at any temperature is PDwax = (Tymax > Ta)/@yq oF the number given in the Absolute Maximum Ratings, whichever is lower. For the LM4040 and LM4041, Tyyjay = 125C, and the typical thermal resistance (6 ,), when board mounted, is 185C/W for the M package, 326C/W for the SOT-23 package, and 180C/W with 0.4" lead length and 170C/W with 0.125" lead length for the TO-92 package. The human body model is a 100pF capacitor discharged through a 1.5kQ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin. Typicals are at T, = 25C and represent most likely parametric norm. Limits are 100% production tested at 25C. Limits over temperature are guaranteed through correlation using Statistical Quality Control (SQL) methods. The boldface (over temperature limit for Reverse Breakdown Voltage Tolerance is defined as the room temperature Reverse Breakdown Voltage Tolerance +[(AV_/AT)(65C)(V,)]. AVP/AT is the V,, temperature coefficient, 65C is the temperature range from 40C to the reference point of 25C, and V, is the reverse breakdown voltage. The total over temperature tolerance for the different grades follows: A-grade: +0.75% = 40.1% +100ppm/C x 65C B-grade: +0.85% = 40.2% +100ppm/C x 65C C-grade: +1.15% = 40.5% +100ppm/C x 65C D-grade: +1.98% = +1.0% +150ppm/C x 66C E-grade: +2.98% = +1.0% +150ppm/C x 65C. Example: The A-grade LM4040-2.5 has an over temperature Reverse Breakdown Voltage tolerance of +2.5 x 0.75% = +19mV. When Voyz 1.6V, the LM4041-ADJ in the SOT-23 package must operate at reduced Ip. This is caused by the series resistance of the die attach between the die (-) output and the package (-) output pin. See the Output Saturation (SOT-23 only) curve in the Typical Performance Characteristics section. Reference voltage and temperature coetticient will change with output voltage. See Typical Performance Characteristics curves. LM4041 Typical Characteristics Ss = E g HAN 3*-0.2 REVERSE CURRENT (HA) Temperature Drift for Different Output impedence Average Temperature Coefficient vs. Frequency Voltage Impedance +0.5 +0.4 +0.3 +0.2 +0.1 0 -0.1 g T= 25C Al, = 0.41, 100 NLM4041-1.2 ! | = 200HA TJ = 25C LM4041-1.2 LM4041-ADS: Your = Vege ge 2 oa Q Qo So ry 8 IMPEDANCE (Q) NOISE (nV/vHz ) 0.3 0.4 05 40-20 0 20 40 60 80 100 400. 1k 10k TEMPERATURE (C) 8 WN Xe -5ippm/ec 4 10 100 1k 10k FREQUENCY (Hz) 100k 1M 1 100k FREQUENCY (Hz) Reverse Characteristics and Minimum Operating Current Reverse Characteristics and Minimum Operating Current 100 100 Rg 30k 80 a Oo 60 40 20 +) = 25C 1-1 9 9 04 #08 12 16 20 REVERSE VOLTAGE (V) Q o t 3 % 4 = 25C 1-1 REVERSE CURRENT (pA) 04 08 12 16 2.0 REVERSE VOLTAGE (Vv) Test Circuit 10-13LM4040/4041 Micrel LM4041 Typical Characteristics Reference Voltage vs. Output Feedback Current vs. Voltage and Temperature Reference Voltage vs. Output Voltage and Temperature 9 P Temperature and Output Voltage P 9 P 1 1 100 a > LM4041-ADJ < Mao LM4041-ADJ = 85C 2. aa im 1.240 G1 < 80 oO ys. 9 out = Vrer =< = 1.236 1 AL = 85C =! _ 60 | 1 9 g : 1 < Lu 3 0 6 3 Bo T,=25C, 40C z z wi | ii ii1 a in] oi bo | wy 4 20 uw Ww oa c 1 1 9 0 2 4 6 8B 10 -40 -20 0 20 40 60 80 100 0 2 4 6 8 10 OUTPUT VOLTAGE (V) TEMPERATURE (C) OUTPUT VOLTAGE (V) Output Saturation Output impedence Output Impedence (SOT-23 Only) vs. Frequency * vs, Frequency * " 1 KEN LM4041-ADJ 1K TwaDET ABT T 1.6 any Vrer + EV SJ T= 28C p= 1m z rh =1mA | Kile = 0-4) 8 15 g 100 Nao 7 a 400 1a 8 3 Vour = 104 fy - Zz 10 g 0 3 1.3 9 Vour = 10 3 eS o a . 5 12 5 =~ /) FI =, 7.23) ee 2.5 > 11 x) ~ 5 Xe Xo 1.0 0 0 L 0 2 4 6 8 0 12 100 ik 10k 100k 1M 100. 1k 10k 100k 1M OUTPUT CURRENT (mA) FREQUENCY (Hz) FREQUENCY (Hz) Reverse Characteristics t FB STEPS (V} 0 2 4 6 8 < 2 b = g LM4041-ADJ Vout 5 Oo Ly 7 c uJ > Lu = a JT LM4041-ADJ 9% 2 4. 6 8 10 t Reverse Characteristics * Output Impedance vs. Freq. OUTPUT VOLTAGE (V) Test Circuit Test Circuit Large Signal Response t gev'g P +15V 10 = a 8 GS LM4041 - ADJ = . Vv 5, (-) OUT > 2 0 0 10 20 30 40 # Large Signal Response RESPONSE TIME (us) Test Circuit 10-14LM4040/4041 Micrel maximum value. When the supply voltage is at its maximum and |, is at its minimum, Rg should be large enough so that the current flowing through the LM4040-x.x is less than 15mA, and the current flowing through the LM4041-1.2 or LM4041-AD4J is less than 12mA. Rg is determined by the supply voltage (Vg), the load and operating current, (1, and I,), and the references reverse breakdown voltage (V,). R, = (V, Va_)/ (I + IQ) Adjustable Regulator The LM4041-ADJs output voltage can be adjusted to any value in the range of 1.24V through 10V. It is a function of the internal reference voltage (Vpe-) and the ratio of the external feedback resistors as shown in Figure 2. The output is found using the equation (1) Vo = Vaer [ (R2/R1) +1] where Vo is the desired output voltage. The actual value of the internal Vag; is a function of Vo. The corrected Vier is determined by (2) Vaer = Vo (AVper / AV) = Vy where Vy is the desired output voltage. AVaer/ AVp is found in the Electrical Characteristics and is typically 1.3mV/V and Vy is equal to 1.240V. Replace the value of Vare in equation (1) with the value found using equation (2). Note that actual output voltage can deviate from that pre- dicted using the typical AVaere / AV, in equation (2); for C- grade parts, the worst-case AVger / AV is -2.5mV/V and Vy = 1.248V, The following example shows the difference in output voltage resulting from the typical and worst case values of AVper / AV: Let Vo =+9V. Using the typical values of AVaee /AVg, Veer is 1.228V. Choosing a value of R1 = 10kQ, R2 = 63.272kQ. Using the worst case AVper / AVa for the C-grade and D- grade parts, the output voltage is actually 8.965V and 8.946V respectively. This results in possible errors as large as 0.39% for the C-grade parts and 0.59% for the D-grade parts. Once again, resistor values found using the typical value of AVper / AV will work in most cases, requiring no further adjustment. LM4041-ADJ D1 50uA LM4041-ADJ Figure 5. Fast Positive Clamp 2.4V + AVp, A WV Figure 4. Voltage Level Detector LM4041-ADJ Figure 6. Bidirectional Clamp 12.4V 10-15LM4040/4041 Micrel! Vout D2 1N457 LM4041-ADJ LM4041-ADJ LM4041-ADJ Figure 7. Bidirectional Adjustable Clamp Figure 10. Current Source +18V to 12.4V 0 to 20mA o~-e 1N4002 D2 ITHRESHOLD = 4A < Igy = 100MA \ 1.24V out =a 39005 + 2% LM4041-ADJ fo a 1.24V | R1 =4N28 GAIN Ri, VWAr + a a: 4N28 =3.2mA Nc. SpA Figure 9. Floating Current Detector Figure 8. Bidirectional Adjustable Clamp 42.4 to +6V + 5V R2 0 to 20 mA Sell +5V Al 2 33222 + 11% LM4041-ADJ D2 1N914 R3 1N4002 Bons , RS R 22k 1 6 pr We se 2 5_1 41 cmos 4 10M 1.24V Nc.-=|_anze LyRESHOLD = mi =3.7mA + 2% Tt. Figure 11. Precision Floating Current Detector * D1 can be any LED, Vp = 1.5V to 2.2V at 3mA. D1 may act as an indicator. D1 will be on if ltyRESHOLD falls below the threshold current, except with | = O. 10-16