LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Description Pin Assignments The LM4040 is a family of bandgap circuits designed to achieve precision micro-power voltage references of 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V. The devices are available in 0.2% B-grade, 0.5% C-grade, and 1% D-grade initial tolerances. (Top View) They are available in small outline SOT23 surface mount packages, which are ideal for applications where space is at a premium. Excellent performance is maintained over the 60A to 15mA operating current range with a typical temperature coefficient of only 20ppm/C. The device is designed to be highly tolerant of capacitive loads, which maintains excellent stability. * Pin 3 must be left floating or connected to pin 2 SOT23 This device offers a pin for pin compatible alternative to the LM4040 voltage reference. Features * * * * * * * * * * * * LM4040 (SC70-5) (TopH5 View) 4 N/C Anode 1 Small Package: SOT23 SC70-5 Variants Are End of Life (EOL) No Output Capacitor Required Output Voltage Tolerance LM4040B: 0.2% at +25C LM4040C : 0.5% at +25C LM4040D: 1% at +25C Low Output Noise (10Hz to 10kHz) 45VRMS * 2 5 N/C Cathode 3 Top View SC70-5** * Pin 2 must be left floating or connected to pin 1 * Pin 2 must be left floating or connected to pin 1. ** SC70-5 variants are End of Life (EOL). Wide Operating Current Range 60A to 15mA Extended Temperature Range -40C to +125C Low Temperature Coefficient 100 ppm/C (max) Green Molding in Small Package SOT23 Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. "Green" Device (Note 3) An Automotive-Compliant Part is Available Under Separate Datasheet (LM4040Q) Applications * * * * * * Battery Powered Equipment Precision Power Supplies Portable Instrumentation Portable Communications Devices Notebook and Palmtop Computers Data Acquisition Systems Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated's definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green" products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. LM4040 Document number: DS33195 Rev. 8 - 2 1 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Absolute Maximum Ratings (Voltages to Anode Unless Otherwise Stated) Parameter Continuous Reverse Current Continuous Forward Current Rating Unit 20 mA 10 mA Operating Junction Temperature -40 to +150 C Storage Temperature -55 to +150 C Caution: Stresses greater than the Absolute Maximum Ratings specified above, may cause permanent damage to the device. These are stress ratings only; functional operation of the device at conditions between maximum recommended operating conditions and absolute maximum ratings is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. (Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling and transporting these devices.) Unless otherwise stated voltages specified are relative to the Anode pin. Package Thermal Data Package JA SOT23 380C/W PDIS TA = +25C, TJ = +125C 330mW Recommended Operating Conditions Parameter Min Max Unit Reverse Current 0.06 15 mA Operating Ambient Temperature Range -40 +125 C Electrical Characteristics (Test conditions: TA = +25C, unless otherwise specified.) LM4040-25 Symbol Parameter Reverse Breakdown Voltage VREF IRMIN Reverse Breakdown Voltage Tolerance Minimum Operating Current VR/T Average Reverse Breakdown Voltage Temperature Coefficient VR/IR Reverse Breakdown Change with Current ZR Dynamic Output Impedance en Noise Voltage VR VHYST LM4040 Long Term Stability (Non Cumulative) Thermal Hysteresis Document number: DS33195 Rev. 8 - 2 Conditions -- TA +25C IR = 100A +25C -40 to +85C IR = 100A -40 to +125C +25C -- -40 to +85C -40 to +125C IR = 10mA -40 to +125C IR = 1mA IR = 100A +25C IRMIN IR -40 to +85C 1mA -40 to +125C +25C 1mA IR -40 to +85C 15mA -40 to +125C IR = 1mA, f = 120Hz IAC = 0.1IR IR = 100A 10Hz < f < 10kHz t = 1000Hrs, IR = 100A T = -40C to +125C 2 of 16 www.diodes.com LM4040 B Limits -- 5 21 30 60 65 68 -- 100 -- 0.8 1.0 1.0 6.0 8.0 8.0 LM4040 C Limits -- 12 29 38 60 65 68 -- 100 -- 0.8 1.0 1.0 6.0 8.0 8.0 LM4040 D Limits -- 25 49 63 65 70 73 -- 150 -- 1.0 1.2 1.2 8.0 10.0 10.0 0.3 0.8 0.9 1.1 35 -- -- -- VRMS 120 0.08 -- -- -- -- -- -- ppm % Typ 2.5 -- 45 -- 20 15 15 0.3 -- 2.5 -- Unit V mV A ppm/C mV August 2019 (c) Diodes Incorporated LM4040 Electrical Characteristics (continued) (Test conditions: TA = +25C, unless otherwise specified.) LM4040-30 Symbol Parameter Reverse Breakdown Voltage VREF IRMIN Reverse Breakdown Voltage Tolerance Minimum Operating Current VR/T Average Reverse Breakdown Voltage Temperature Coefficient VR/IR Reverse Breakdown Change with Current ZR Dynamic Output Impedance en Noise Voltage VR VHYST Long Term Stability (Non-Cumulative) Thermal Hysteresis Conditions -- TA +25C IR = 100A +25C -40 to +85C IR = 100A -40 to +125C +25C -- -40 to +85C -40 to +125C IR = 10mA -40 to +125C IR = 1mA IR = 100A +25C IRMIN IR -40 to +85C 1mA -40 to +125C +25C 1mA IR -40 to +85C 15mA -40 to +125C IR = 1mA, f = 120Hz IAC = 0.1IR IR = 100A 10Hz < f < 10kHz t = 1000Hrs, IR = 100A T = -40C to +125C LM4040 B Limits -- 6 26 37 62 67 70 -- 100 -- 0.8 1.1 1.1 6.0 9.0 9.0 LM4040 C Limits -- 15 34 45 62 67 70 -- 100 -- 0.8 1.1 1.1 6.0 9.0 9.0 LM4040 D Limits -- 30 59 75 67 72 75 -- 150 -- 1.0 1.3 1.3 8.0 11.0 11.0 0.4 0.9 0.9 1.2 35 -- -- -- VRMS 120 0.08 -- -- -- -- -- -- ppm % B Limits C Limits D Limits Units 20 6.6 28 40 62 67 70 -- 16.5 38 50 62 67 70 -- 33 65 83 67 72 75 -- 15 100 100 150 0.8 1.1 1.1 6 9.0 9.0 0.8 1.1 1.1 6 9 9 1 1.3 1.3 8 11 11 mV 0.4 0.9 0.9 1.2 Typ 3.0 -- 47 -- 20 15 15 0.4 -- 2.7 -- Unit V mV A ppm/C mV Electrical Characteristics (cont.) (@TA = +25C, unless otherwise specified.) LM4040-33 Symbol Parameter Reverse Breakdown Voltage VREF IRMIN VR/T VR/IR Reverse Breakdown Voltage Tolerance Minimum Operating Current Average Reverse Breakdown Voltage Temperature Coefficient Reverse Breakdown Change With Current Conditions - TA IR = 100A IR = 100A -- +25C +25C -40 to +85C -40 to +125C +25C -40 to +85C -40 to +125C IR = 10mA -40 to +125C IR = 1mA 1mA < IR < 15mA 3.3 -- 47 -- V 15 IR = 100A IRMIN IR < 1mA Typ +25C -40 to +85C -40 to +125C +25C -40 to +85C -40 to +125C 0.4 -- 2.7 -- mV A -- ppm/C -- ZR Dynamic Output Impedance IR = 1mA, f = 120Hz, IAC = 0.1IR en Noise Voltage IR = 100A, 10Hz < f < 10kHz 35 -- -- -- VRMS VR Long Term Stability (Non-Cumulative) t = 1000Hrs, IR = 100A 120 -- -- -- ppm Thermal Hysteresis T = -40C to = +125C 0.08 -- -- -- % VHYST LM4040 Document number: DS33195 Rev. 8 - 2 3 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Electrical Characteristics (cont.) (@TA = +25C, unless otherwise specified.) LM4040-41 Symbol VREF IRMIN VR/T VR/IR Conditions Parameter TA Reverse Breakdown Voltage IR = 100A Reverse Breakdown Voltage Tolerance IR = 100A Minimum Operating Current Average Reverse Breakdown Voltage Temperature Coefficient Reverse Breakdown Change With Current -- +25C +25C -40 to +85C -40 to +125C +25C -40 to +85C -40 to +125C IR = 10mA -40 to +125C IR = 1mA IR = 100A +25C -40 to +85C -40 to +125C +25C -40 to +85C -40 to +125C IRMIN IR < 1mA 1mA < IR < 15mA Typ B Limits C Limits D Limits Units 4.096 -- -- -- V 30 8.2 35 49 83 88 88 -- 20 47 60 83 88 88 -- 41 81 102 83 88 88 -- 20 100 100 150 ppm/C -- 50 -- mV A -- 20 -- -- -- -- 0.5 0.9 1.2 1.2 7 10 10 0.9 1.2 1.2 7 10 10 1.2 1.5 1.5 9 13 13 mV -- 3 -- ZR Dynamic Output Impedance IR = 1mA, f = 120Hz, IAC = 0.1IR 0.5 1 1 1.3 en Noise Voltage IR = 100A, 10Hz < f < 10kHz 64 -- -- -- VRMS VR Long Term Stability (Non-Cumulative) t = 1000Hrs, IR = 100A 120 -- -- -- ppm Thermal Hysteresis T = -40C to = +125C 0.08 80 VHYST % Electrical Characteristics (cont.) (Test conditions: TA = +25C, unless otherwise specified.) LM4040-50 Symbol VREF IRMIN VR/T VR/IR Parameter Reverse Breakdown Voltage -- IR = 100A Reverse Breakdown Voltage Tolerance IR = 100A Minimum Operating Current -- Average Reverse Breakdown Voltage Temperature Coefficient IR = 10mA IR = 1mA IR = 100A Reverse Breakdown Change with Current ZR Dynamic Output Impedance en Noise Voltage VR VHYST LM4040 Conditions Long Term Stability (Non-Cumulative) Thermal Hysteresis Document number: DS33195 Rev. 8 - 2 TA +25C +25C -40 to +85C -40 to +125C +25C -40 to +85C -40 to +125C -40 to +125C +25C -40 to +85C -40 to +125C +25C 1mA IR -40 to +85C 15mA -40 to +125C IR = 1mA, f = 120Hz IAC = 0.1IR IR = 100A 10Hz < f < 10kHz t = 1000Hrs, IR = 100A T = -40C to +125C IRMIN IR 1mA 4 of 16 www.diodes.com LM4040 B Limits LM4040 C Limits LM4040 D Limits -- 10 43 60 74 80 83 -- 100 -- 1.0 1.4 1.4 8.0 12.0 12.0 -- 25 58 75 74 80 83 -- 100 -- 1.0 1.4 1.4 8.0 12.0 12.0 -- 50 99 125 79 85 88 -- 150 -- 1.3 1.8 1.8 10.0 15.0 15.0 0.5 1.1 1.1 1.5 80 -- -- -- VRMS 120 0.08 -- -- -- -- -- -- ppm % Typ 5.0 -- 54 -- 30 20 20 0.5 -- 3.5 -- Units V mV A ppm/C mV August 2019 (c) Diodes Incorporated LM4040 Typical Characteristics - Reference Voltage Temperature Coefficient at 100A LM4040-25 LM4040-30 LM4040-33 LM4040-41 LM4040-50 LM4040 Document number: DS33195 Rev. 8 - 2 5 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Typical Characteristics - Reference Voltage Temperature Coefficient at 1mA LM4040-25 LM4040-30 LM4040-33 LM4040-41 LM4040-50 LM4040 Document number: DS33195 Rev. 8 - 2 6 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Typical Characteristics - Reverse Characteristics 500 400 TA = 25C IR, REVERSE CURRENT (A) IR, REVERSE CURRENT (A) 500 300 200 100 0 -100 -200 0 2 1 VR, REVERSE VOLTAGE (V) 300 200 100 0 -100 -300 -1 3 LM4040-25 LM4040-33 IR, REVERSE CURRENT (A) TA = 25C -200 -300 -1 500 400 1 2 0 3 VR, REVERSE VOLTAGE (V) LM4040-30 4 LM4040-41 TA = 25C 400 300 200 100 0 -100 -200 -300 -400 -1 0 1 2 3 4 5 VR, REVERSE VOLTAGE (V) 6 LM4040-50 LM4040 Document number: DS33195 Rev. 8 - 2 7 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Typical Characteristics LM4040Q Reference Impedance 100 CL = 1.0F Tantalum 100 1k ZR, REFERENCE IMPEDANCE () TA = 25C I R = 100A CL = 0 10k 100k 1M FREQUENCY (Hz) LM4040-25 100 1k 10 CL = 0 1 0.1 0.01 100 1k 10k 100k FREQUENCY (Hz) LM4040-25 1M 1k 10k 100k FREQUENCY (Hz) I LM4040-30 d F 1M 1k 10k 100k FREQUENCY (Hz) I LM4040-50 d F 1M 100 ZR, REFERENCE IMPEDANCE () CL = 0 10k CL = 1.0F Tantalum f TA = 25C IR = 100A CL = 1.0F Tantalum TA = 25C IR = 1mA 100k 1M 10 1 0.1 0.01 100 FREQUENCY (Hz) LM4040-30 R f ZR, REFERENCE IMPEDANCE () 100 100 1k R f LM4040 10k 100k 1 0.1 100 1M FREQUENCY (Hz) ILM4040-50 d F Document number: DS33195 Rev. 8 - 2 10 R f 8 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Typical Characteristics LM4040Q Noise Characteristics 500 480 460 650 TA = 25C IR = 100A 600 NOISE (nV/Hz) NOISE (nV/Hz) 440 420 400 380 360 550 500 450 340 320 300 -1 1200 400 0 2 1 FREQUENCY (Hz) Noise Voltage vs. Frequency LM4040-25 3 10 1k 10k 100 FREQUENCY (Hz) Noise Voltage vs. Frequency LM4040-30 100k NOISE (nV/Hz) 1000 800 600 400 10 LM4040 1k 10k 100 FREQUENCY (Hz) Noise Voltage vs. Frequency LM4040-50 Document number: DS33195 Rev. 8 - 2 100k 9 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Start Up Characteristics LM4040Q Short Pulse LM4040-30 LM4040-25 LM4040-33 LM4040-41 LM4040-50 LM4040 Document number: DS33195 Rev. 8 - 2 10 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Start Up Characteristics LM4040Q Long Pulse LM4040-25 LM4040-30 LM4040-33 LM4040-41 LM4040-50 LM4040 Document number: DS33195 Rev. 8 - 2 11 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Application Information In a conventional shunt regulator application (Figure 1), an external series resistor (RS) is connected between the supply voltage, VS, and the LM4040. RS determines the current that flows through the load (IL) and the LM4040 (IR). Because load current and supply voltage can vary, RS should be small enough to supply at least the minimum acceptable IR to the LM4040 even when the supply voltage is at its minimum and the load current is at its maximum value. When the supply voltage is at its maximum and IL is at its minimum, RS should be large enough so that the current flowing through the LM4040 is less than 15mA. RS is determined by the supply voltage, (VS), the load and operating current, (IL and IR), and the LM4040's reverse breakdown voltage, VR. RS = VS - VR IL + IR Printed Circuit Board Layout Considerations The LM4040 device in the SOT23 package has the die attached to pin 3, which results in an electrical contact between pin 2 and pin 3. Therefore, pin 3 of the SOT23 package must be left floating or connected to pin 2. Figure 1 LM4040 Document number: DS33195 Rev. 8 - 2 12 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 Ordering Information Voltage (V) Status (Note 4) LM4040B25FTA 2.5 LM4040B30FTA 3.0 3.3 Part Number LM4040B33FTA +25C Tol 0.2% Quantity Package (Note 5) Identification Code Reel Size Tape Width Full Production SOT23 R2B 7", 180mm 8mm 3000 Full Production SOT23 R3B 7", 180mm 8mm 3000 Full Production SOT23 3B3 7", 180mm 8mm 3000 per Reel LM4040B41FTA 4.096 Full Production SOT23 4B1 7", 180mm 8mm 3000 LM4040B50FTA 5.0 Full Production SOT23 R5B 7", 180mm 8mm 3000 LM4040C25FTA 2.5 Full Production SOT23 R2C 7", 180mm 8mm 3000 LM4040C30FTA 3.0 Full Production SOT23 R3C 7", 180mm 8mm 3000 LM4040C33FTA 3.3 Full Production SOT23 3C3 7", 180mm 8mm 3000 LM4040C41FTA 4.096 Full Production SOT23 4C1 7", 180mm 8mm 3000 LM4040C50FTA 5.0 Full Production SOT23 R5C 7", 180mm 8mm 3000 LM4040D25FTA 2.5 Full Production SOT23 R2D 7", 180mm 8mm 3000 LM4040D30FTA 3.0 Full Production SOT23 R3D 7", 180mm 8mm 3000 LM4040D33FTA 0.5% 3.3 Full Production SOT23 3D3 7", 180mm 8mm 3000 LM4040D41FTA 1% 4.096 Full Production SOT23 4D1 7", 180mm 8mm 3000 LM4040D50FTA 5.0 Full Production SOT23 R5D 7", 180mm 8mm 3000 See LM4040Q datasheet for Automotive-compliant versions with AEC-Q100 qualification. Notes: 4. SC70-5 (H5 package code) options are End Of Life (EOL). Package information can be found at end of datasheet. 5. Package dimensions and pad layout can be found on our website at http://www.diodes.com/package-outlines.html. Marking Information (1) SOT23 LM4040-25, LM4040-30, LM4040-50 RXX : Identification Code LM4040-33, LM4040-41 XXX : Identification code Y : Year : 0~9 W : Week: A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : Internal code LM4040 Document number: DS33195 Rev. 8 - 2 13 of 16 www.diodes.com Part Number LM4040B25FTA LM4040B30FTA LM4040B50FTA LM4040C25FTA LM4040C30FTA LM4040C50FTA LM4040D25FTA LM4040D30FTA LM4040D50FTA Part Number LM4040B33FTA LM4040B41FTA LM4040C33FTA LM4040C41FTA LM4040D33FTA LM4040D41FTA Identification Code R2B R3B R5B R2C R3C R5C R2D R3D R5D Identification Code 3B3 4B1 3C3 4C1 3D3 4D1 August 2019 (c) Diodes Incorporated LM4040 Package Outline Dimensions Please see http://www.diodes.com/package-outlines.html for the latest version. SOT23 All 7 H K1 GAUGE PLANE 0.25 J K a M A L C L1 B D G F SOT23 Dim Min Max Typ A 0.37 0.51 0.40 B 1.20 1.40 1.30 C 2.30 2.50 2.40 D 0.89 1.03 0.915 F 0.45 0.60 0.535 G 1.78 2.05 1.83 H 2.80 3.00 2.90 J 0.013 0.10 0.05 K 0.890 1.00 0.975 K1 0.903 1.10 1.025 L 0.45 0.61 0.55 L1 0.25 0.55 0.40 M 0.085 0.150 0.110 a 0 8 -All Dimensions in mm Suggested Pad Layout Please see http://www.diodes.com/package-outlines.html for the latest version. SOT23 Y C Y1 X LM4040 Document number: DS33195 Rev. 8 - 2 Dimensions C X X1 Y Y1 Value (in mm) 2.0 0.8 1.35 0.9 2.9 X1 14 of 16 www.diodes.com August 2019 (c) Diodes Incorporated LM4040 SC70-5 (H5) End of Life Options Part Number +25C Tol LM4040B25H5TA LM4040B30H5TA Package (Note 5) Identification Code Reel Size Tape Width Quantity (V) Status (Note 4) 2.5 End of Life SC70-5 R2B 7", 180mm 8mm 3000 per Reel 3.0 End of Life SC70-5 R3B 7", 180mm 8mm 3000 LM4040B50H5TA 5.0 End of Life SC70-5 R5B 7", 180mm 8mm 3000 LM4040C25H5TA 2.5 End of Life SC70-5 R2C 7", 180mm 8mm 3000 3.0 End of Life SC70-5 R3C 7", 180mm 8mm 3000 5.0 End of Life SC70-5 R5C 7", 180mm 8mm 3000 2.5 End of Life SC70-5 R2D 7", 180mm 8mm 3000 3.0 End of Life SC70-5 R3D 7", 180mm 8mm 3000 5.0 End of Life SC70-5 R5D 7", 180mm 8mm 3000 LM4040C30H5TA 0.2% Voltage 0.5% LM4040C50H5TA LM4040D25H5TA LM4040D30H5TA 1% LM4040D50H5TA Marking Information RXX : Identification code Part Number LM4040B25H5TA LM4040B30H5TA LM4040B50H5TA LM4040C25H5TA LM4040C30H5TA LM4040C50H5TA LM4040D25H5TA LM4040D30H5TA LM4040D50H5TA Identification Code R2B R3B R5B R2C R3C R5C R2D R3D R5D Package Outline Dimensions Dim. Min. Max. Typ. A A1 1.1 0.1 0.8 - - A2 1 0.8 - b 0.3 0.15 - C 0.25 0.08 - D 2.00 BSC E E1 2.10 BSC 1.25 BSC e 0.65 BSC e1 LM4040 Document number: DS33195 Rev. 8 - 2 15 of 16 www.diodes.com 1.30 BSC L 0.46 0.26 - a 0 8 - August 2019 (c) Diodes Incorporated LM4040 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. 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