A Product Line of Diodes Incorporated 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 and 5.0V. The devices are available in 0.2% B-grade, 0.5% C-grade and 1% D-grade initial tolerances. They are available in small outline SOT23 and SC70-5 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 has been designed to be highly tolerant of capacitive loads so maintaining excellent stability. This device offers a pin for pin compatible alternative to the LM4040 voltage reference. LM4040 F (SOT23) Cathode 3 1 * Anode 2 Top view * Pin 1 must be left floating or connected to pin 2 LM4040 H5 (SC70-5) Anode 1 * 4 N/C 2 Features * * * * * * * * * Cathode 3 Small packages: SOT23 & SC70-5 No output capacitor required Output voltage tolerance o LM4040B 0.2% at 25C o LM4040C 0.5% at 25C o LM4040D 1% at 25C Low output noise (10Hz to 10kHz) .............. 45VRMS Wide operating current range 60A to 15mA Extended temperature range -40C to +125C Low temperature coefficient 100 ppm/C (max) All parts AEC-Q100 Grade1 qualified 5 N/C Top View * Pin 2 must be left floating or connected to pin 1 Applications * * * * * * Battery powered equipment Precision power supplies Portable instrumentation Portable communications devices Notebook and palmtop computers Data acquisition systems LM4040 Document number: DS33195 Rev. 5 - 2 1 of 12 www.diodes.com March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Absolute Maximum Ratings (Voltages to GND Unless Otherwise Stated) Parameter Rating Unit Continuous Reverse Current 20 mA Continuous Forward Current 10 mA Operating Junction Temperature -40 to +150 C Storage Temperature -55 to +150 C Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum rating, for extended periods, may reduce device reliability. Unless otherwise stated voltages specified are relative to the ANODE pin. Package Thermal Data PDIS Package JA SOT23 380C/W 330mW SC70-5 380C/W 330mW TAMB = 25C, TJ = 150C Recommended Operating Conditions Min. Max. Units Reverse Current 0.06 15 mA Operating Ambient Temperature Range -40 125 C LM4040 Document number: DS33195 Rev. 5 - 2 2 of 12 www.diodes.com March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Electrical Characteristics (Test conditions: TAMB = 25C, unless otherwise specified.) LM4040-2.5 Symbol Reverse breakdown voltage VREF Conditions Parameter Reverse breakdown voltage tolerance TAMB IR = 100A IR = 100A 25C VR/T Average reverse breakdown voltage temperature coefficient 25 -40 to +85C 21 29 49 30 38 63 60 60 65 VR/IR Reverse breakdown change with current 1mA < IR < 15mA 45 Units V 12 -40 to +85C 65 65 70 -40 to +125C 68 68 73 100 100 150 0.8 0.8 1.0 1.0 1.0 1.2 mV A 20 -40 to +125C IR = 100A IRMIN IR < 1mA LM4040 D Limits 5 IR = 10mA IR = 1mA LM4040 C Limits 2.5 -40 to +125C Minimum operating current LM4040 B Limits 25C 25C IRMIN Typ. 15 ppm/C 15 25C 0.3 -40 to +85C -40 to +125C 1.0 1.0 1.2 6.0 6.0 8.0 -40 to +85C 8.0 8.0 10.0 -40 to +125C 8.0 8.0 10.0 0.8 0.9 1.1 25C IR = 1mA, f = 120Hz 2.5 mV ZR Dynamic output impedance en Noise voltage IR = 100A 10Hz < f < 10kHz 35 VRMS VR Long term stability (non cumulative) t = 1000Hrs, IR = 100A 120 ppm Themal hysteresis T = -40C to =125C 0.08 % VHYST LM4040 Document number: DS33195 Rev. 5 - 2 IAC = 0.1IR 3 of 12 www.diodes.com 0.3 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Electrical Characteristics (cont.) (Test conditions: TAMB = 25C, unless otherwise specified.) LM4040-3.0 Symbol Reverse breakdown voltage VREF Conditions Parameter Reverse breakdown voltage tolerance TAMB IR = 100A 25C IR = 100A VR/T Minimum operating current Average reverse breakdown voltage temperature coefficient VR/IR Reverse breakdown change with current 1mA < IR < 15mA LM4040 D Limits 30 -40 to +85C 26 34 59 -40 to +125C TBD 45 75 47 Units V 15 62 62 67 -40 to +85C 67 67 72 -40 to +125C 70 70 75 100 100 150 0.8 0.8 1.0 -40 to +85C 1.1 110 1.3 -40 to +125C 1.1 1.1 1.3 6.0 6.0 8.0 -40 to +85C 9.0 9.0 11.0 -40 to +125C 9.0 9.0 11.0 0.9 0.9 1.2 mV A 20 -40 to +125C IR = 100A IRMIN IR < 1mA LM4040 C Limits 6 IR = 10mA IR = 1mA LM4040 B Limits 3.0 25C 25C IRMIN Typ. 15 ppm/C 15 25C 25C IR = 1mA, f = 120Hz 0.4 2.7 mV ZR Dynamic output impedance en Noise voltage IR = 100A 10Hz < f < 10kHz 35 VRMS VR Long term stability (non cumulative) t = 1000Hrs, IR = 100A 120 ppm Themal hysteresis T = -40C to = 125C 0.08 % VHYST LM4040 Document number: DS33195 Rev. 5 - 2 IAC = 0.1IR 4 of 12 www.diodes.com 0.4 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Electrical Characteristics (cont.) (Test conditions: TAMB = 25C, unless otherwise specified.) LM4040-5.0 Symbol Reverse breakdown voltage VREF Conditions Parameter Reverse breakdown voltage tolerance TAMB IR = 100A IR = 100A 25C VR/T Minimum operating current Average reverse breakdown voltage temperature coefficient VR/IR Reverse breakdown change with current 1mA < IR < 15mA LM4040 D Limits 5.0 -40 to +85C 43 58 99 -40 to +125C 60 75 125 54 Units V 25 50 74 74 79 -40 to +85C 80 80 85 -40 to +125C 83 83 88 100 100 150 1.0 1.0 1.3 -40 to +85C 1.4 1.4 1.8 -40 to +125C 1.4 1.4 1.8 8.0 8.0 10.0 -40 to +85C 12.0 12.0 15.0 -40 to +125C 12.0 12.0 15.0 1.1 1.1 1.5 mV A 30 -40 to +125C IR = 100A IRMIN IR < 1mA LM4040 C Limits 10 IR = 10mA IR = 1mA LM4040 B Limits 25C 25C IRMIN Typ. 20 ppm/C 20 25C 25C IR = 1mA, f = 120Hz 0.5 3.5 mV ZR Dynamic output impedance en Noise voltage IR = 100A 10Hz < f < 10kHz 80 VRMS VR Long term stability (non cumulative) t = 1000Hrs, IR = 100A 120 ppm Themal hysteresis T = -40C to =125C 0.08 % VHYST LM4040 Document number: DS33195 Rev. 5 - 2 IAC = 0.1IR 5 of 12 www.diodes.com 0.5 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES 1.00 1.00 0.75 0.75 0.50 0.50 0.25 0.25 VREF (%) VREF (%) Typical Characteristics LM4040-2.5 IR = 100A 0.00 -0.25 -0.25 -0.50 -0.50 -0.75 -0.75 -1.00 -40 0 40 80 TEMPERATURE (C) Reference Voltage Temperature Coefficient -1.00 -40 120 100 CL = 1.0F Tantalum 100 1k ZR, REFERENCE IMPEDANCE () TA = 25C IR = 100A CL = 0 10k 100k 500 TA = 25C IR = 100A 440 NOISE (nV/Hz) CL = 1.0F Tantalum 120 CL = 0 1 0.1 1k 10k 100k 1M FREQUENCY (Hz) Reference Impedance vs. Frequency 500 IR, REVERSE CURRENT (A) 460 40 80 TEMPERATURE (C) Reference Voltage Temperature Coefficient 10 0.01 100 1M 0 TA = 25C IR = 1mA FREQUENCY (Hz) Reference Impedance vs. Frequency 480 IR = 1mA 0.00 420 400 380 360 340 400 TA = 25C 300 200 100 0 -100 -200 320 300 -1 0 1 2 FREQUENCY (Hz) Noise Voltage vs. Frequency LM4040 Document number: DS33195 Rev. 5 - 2 3 6 of 12 www.diodes.com -300 -1 0 1 2 VR, REVERSE VOLTAGE (V) Reference Current vs. Voltage 3 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES 1.00 1.00 0.75 0.75 0.50 0.50 0.25 VREF (%) VREF (%) Typical Characteristics LM4040-3.0 IR = 100A 0.00 0.25 0.00 -0.25 -0.25 -0.50 -0.50 -0.75 -0.75 -1.00 -40 0 40 80 TEMPERATURE (C) Reference Voltage Temperature Coefficient -1.00 -40 120 0 40 80 TEMPERATURE (C) Reference Voltage Temperature Coefficient 120 100 CL = 1.0F Tantalum 100 1k ZR, REFERENCE IMPEDANCE () TA = 25C IR = 100A CL = 0 10k 100k 10 1 0.1 0.01 100 1M FREQUENCY (Hz) Reference Impedance vs. Frequency 650 1k 10k 100k 1M FREQUENCY (Hz) Reference Impedance vs. Frequency 500 IR, REVERSE CURRENT (A) TA = 25C NOISE (nV/Hz) 600 550 500 450 300 200 100 0 -100 -200 400 10 400 100 1k 10k FREQUENCY (Hz) Noise Voltage vs. Frequency LM4040 Document number: DS33195 Rev. 5 - 2 100k 7 of 12 www.diodes.com -300 -1 0 1 2 3 VR, REVERSE VOLTAGE (V) Reference Current vs. Voltage 4 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES 1.00 1.00 0.75 0.75 0.50 0.50 0.25 0.25 VREF (%) VREF (%) Typical Characteristics LM4040-5.0 0.00 0.00 -0.25 -0.25 -0.50 -0.50 -0.75 -0.75 -1.00 -40 0 40 80 TEMPERATURE (C) Reference Voltage Temperature Coefficient IR = 1mA -1.00 -40 120 0 40 80 TEMPERATURE (C) Reference Voltage Temperature Coefficient 120 ZR, REFERENCE IMPEDANCE () 100 100 1k 10k 100k 10 1 0.1 100 1M FREQUENCY (Hz) Reference Impedance vs. Frequency 1k 10k 100k 1M FREQUENCY (Hz) Reference Impedance vs. Frequency 1200 IR, REVERSE CURRENT (A) 500 NOISE (nV/Hz) 1000 800 600 TA = 25C 400 300 200 100 0 -100 -200 -300 400 10 100 1k 10k FREQUENCY (Hz) Noise Voltage vs. Frequency LM4040 Document number: DS33195 Rev. 5 - 2 100k 8 of 12 www.diodes.com -400 -1 0 1 2 3 4 5 VR, REVERSE VOLTAGE (V) Reference Current vs. Voltage 6 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Start Up Characteristics LM4040-2.5, 3.0 and 5.0 LM4040-2.5 6 INPUT & OUTPUT VOLTAGE (V) INPUT & OUTPUT VOLTAGE (V) 6 5 4 3 2 1 0 Input 5 TA = 25C RS = 30k 4 3 Output 2 1 0 0 2 4 6 8 TIME (s) Long Pulse Response 10 0 2 4 6 8 TIME (s) Short Pulse Response 10 0 2 10 0 2 10 LM4040-3.0 7 INPUT & OUTPUT VOLTAGE (V) INPUT & OUTPUT VOLTAGE (V) 7 6 5 4 3 2 1 0 6 5 4 3 2 1 0 0 2 4 6 8 TIME (s) Long Pulse Response 10 4 6 8 TIME (s) Short Pulse Response LM4040-5.0 12 INPUT & OUTPUT VOLTAGE (V) INPUT & OUTPUT VOLTAGE (V) 12 10 8 6 4 2 0 0 20 40 60 80 TIME (s) Long Pulse Response LM4040 Document number: DS33195 Rev. 5 - 2 100 9 of 12 www.diodes.com 10 8 6 4 2 0 4 6 8 TIME (s) Short Pulse Response March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES 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. VS IR + IL RS IL VR IR RS determines the current that flows through the load (IL) and the LM4040 (IR). Since load current and supply voltage may 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 15 mA. 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 LM4040s in the SOT23 package have the die attached to pin 1, which results in an electrical contact between pin 2 and pin 3. Therefore, pin 1 of the SOT-23 package must be left floating or connected to pin 2. LM4040s in the SC70-5 package have the die attached to pin 2, which results in an electrical contact between pin 2 and pin 1. Therefore, pin 2 must be left floating or connected to pin1. Ordering Information 25C Tol Voltage (V) 2.5 0.2% 3.0 5.0 2.5 0.5% 3.0 5.0 2.5 1% 3.0 5.0 Order Code Qualification Package Part Mark Reel Size Tape Width Quantity per Reel LM4040B25FTA Commercial SOT23 R2B 7", 180mm 8mm 3000 LM4040B25H5TA LM4040B30FTA Commercial Commercial SC70-5 SOT23 R2B R3B 7", 180mm 7", 180mm 8mm 8mm LM4040B30H5TA LM4040B50FTA Commercial Commercial SC70-5 SOT23 R3B R5B 7", 180mm 7", 180mm 8mm 8mm LM4040B50H5TA LM4040C25FTA LM4040C25H5TA LM4040C30FTA Commercial Commercial Commercial Commercial SC70-5 SOT23 SC70-5 SOT23 R5B R2C R2C R3C 7", 7", 7", 7", 180mm 180mm 180mm 180mm 8mm 8mm 8mm 8mm LM4040C30H5TA Commercial SC70-5 R3C 7", 180mm 8mm LM4040C50FTA LM4040C50QFTA Commercial Automotive SOT23 SOT23 R5C R5C 7", 180mm 7", 180mm 8mm 8mm 3000 3000 3000 3000 3000 3000 3000 3000 3000 3000 LM4040C50H5TA LM4040D25FTA Commercial Commercial SC70-5 SOT23 R5C R2D 7", 180mm 7", 180mm 8mm 8mm LM4040D25H5TA LM4040D30FTA Commercial Commercial SC70-5 SOT23 R2D R3D 7", 180mm 7", 180mm 8mm 8mm LM4040D30H5TA LM4040D50FTA Commercial Commercial SC70-5 SOT23 R3D R5D 7", 180mm 7", 180mm 8mm 8mm LM4040D50H5TA Commercial SC70-5 R5D 7", 180mm 8mm LM4040 Document number: DS33195 Rev. 5 - 2 10 of 12 www.diodes.com 3000 3000 3000 3000 3000 3000 3000 3000 March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES Package Outline Dimensions SOT23 E e e1 b 3 leads L1 D E1 A A1 Dim. A A1 b c D e Millimeters Min Max 1.12 0.01 0.10 0.30 0.50 0.085 0.20 2.80 3.04 0.95 NOM L Inches Min Max 0.044 0.0004 0.004 0.012 0.020 0.003 0.008 0.110 0.120 0.037 NOM c Dim. e1 E E1 L L1 - Millimeters Min Max 1.90 NOM 2.10 2.64 1.20 1.40 0.25 0.60 0.45 0.62 - Inches Min Max 0.075 NOM 0.083 0.104 0.047 0.055 0.0098 0.0236 0.018 0.024 - Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches SC70-5 Dim. A A1 A2 b C D Millimeters Min Max 0.80 1.10 0.10 0.80 1.00 0.15 0.30 0.08 0.25 2.00 BSC Inches Min Max 0.0315 0.0433 0.0039 0.0315 0.0394 0.006 0.0118 0.0031 0.0098 0.0787 BSC Dim. E E1 e e1 L a Millimeters Min Max 2.10 BSC 1.25 BSC 0.65 BSC 1.30 BSC 0.26 0.46 0 8 Inches Min Max 0.0826 BSC 0.0492 BSC 0.0255 BSC 0.0511 BSC 0.0102 0.0181 0 8 Note: Controlling dimensions are in millimeters. Approximate dimensions are provided in inches LM4040 Document number: DS33195 Rev. 5 - 2 11 of 12 www.diodes.com March 2012 (c) Diodes Incorporated A Product Line of Diodes Incorporated LM4040 PRECISION MICROPOWER SHUNT VOLTAGE REFERENCES 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. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. 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