LM4041 Precision micropower shunt voltage reference Datasheet - production data Description SOT23-3L The LM4041 is a micropower shunt voltage reference, providing a stable 1.225 V output voltage, with an initial accuracy of 0.1% @ 25 C and a low temperature coefficient. Available in SOT323-5L and SOT23-3L surface mount packages, it can be designed in applications where space saving is a critical issue. The low operating current is a key advantage for power restricted designs. In addition, the LM4041 is very stable and can be used in a broad range of application conditions. SOT323-5L Features * Fixed 1.225 V typical output voltage * Ultra low operating current: 40 A at 25 C * High precision: +/- 0.1% @ 25 C (0.2%, 0.5% and 1% versions are also available) * Stable when used with capacitive loads * Industrial (- 40 to+ 85 C) and Extended (- 40 to +125 C) temperature range versions available * 100 ppm/C maximum temperature coefficient * Available in SOT23-3L and SOT323-5L packages Applications * Computers * Battery chargers * Switch mode power supply * Battery operated equipment * Data acquisition systems * Energy management * Instrumentation February 2014 This is information on a product in full production. DocID018817 Rev 4 1/16 www.st.com Contents LM4041 Contents 1 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 7 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2/16 DocID018817 Rev 4 LM4041 1 Pin configuration Pin configuration Figure 1. Pin connection (top view) $0Y $0Y 627/ Note: 627/ Below pins must be left floating or connected to Anode pin to improve noise immunity due to PCB layout. SOT23-3L: pin 3. SOT323-5L: pin 2, pin 4 and pin 5. DocID018817 Rev 4 3/16 16 Maximum ratings 2 LM4041 Maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Value Unit IK Reverse breakdown current 20 mA VK Maximum cathode voltage 8 V IF Forward current 10 mA 500 536 mW - 65 to +150 C 2 kV Machine model (MM) 200 V Charged device model 1500 V Lead temperature (soldering) 10 sec 260 C Max junction temperature +150 C PD TSTG Power dissipation SOT23-3L SOT323-5L (1) Storage temperature Human body model (HBM) ESD TLEAD TJ 1. PD has been calculated with TAMB = 25C and TJMAX = 150 C. Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. Table 2. Thermal data Symbol Parameter SOT323-5L SOT23-3L Unit RthJA Thermal resistance junction-ambient 233 248 C/W RthJC Thermal resistance junction-case 90 136 C/W Value Unit Table 3. Operating conditions Symbol Parameter IKMIN Minimum operating current 40 A IKMAX Maximum operating current 12 mA TOPER Operating free air temperature range 4/16 DocID018817 Rev 4 Industrial - 40 to + 85 Extended - 40 to + 125 C LM4041 3 Electrical characteristics Electrical characteristics TAMB = 25 C, unless otherwise specified. Table 4. Electrical characteristics Symbol Parameter Vk Reverse breakdown voltage Ikmin Minimum operating current Vk/T Average temperature coefficient (2) Vk/Ik Reverse breakdown voltage change with operating current range Test conditions Ik = 100 A LM4041A, 0.1% LM4041B, 0.2% LM4041C, 0.5% LM4041D, 1% 1.2238 1.2225 1.219 1.213 Tamb = 25 C -40 C < Tamb < Tmax Min. Typ. 1.225 25 Max. 1.2262 1.2275 1.231 1.237 V 40 A (1) 50 Ik = 100 A 36 100 Ikmin < Ik < 1 mA - 40 C < Tamb < Tmax (1) 0.4 1 1.5 4 8 10 1 1 mA < Ik < 12 mA - 40 C < Tamb < Tmax (1) Unit ppm/C mV Rka Static impedance Ik = 100 A to 1 mA 0.4 Kvh Long term stability Ik = 100 A, t = 1000 hrs 120 ppm en Wide band noise Ik = 100 A, 10 Hz < f < 10 kHz 60 VRMS W 1. Tmax = 85 C for LM4041xI (industrial version) and Tmax = 125 C for LM4041xE (extended version). 2. The average temperature coefficient is defined as: 106 x {max(Vk) / [Vk@25C x (Tmax-Tmin)]} [ppm/C]. Note: Limits are 100% production tested at 25 C. Limits over temperature are guaranteed through correlation and by design. DocID018817 Rev 4 5/16 16 Typical performance characteristics 4 LM4041 Typical performance characteristics The following plots are referred to the typical application circuit and, unless otherwise noted, at TA = 25 C. Figure 2. Vk change vs. temperature Figure 3. Minimum current for regulation Reverse current I K (A) AM09372v1 AM09371v1 1240 1235 VK (mV) 1230 1225 1220 1215 70 50 30 1210 -40 -20 0 25 50 85 105 125 TEMP ( C) 10 0.4 Figure 4. Output impedance vs. frequency 0.8 VK (V) 1.2 Figure 5. Minimum current for regulation vs. temperature AM09373v1 1000 AM09374v1 60 Theoric C=1F 50 C= 0 40 IKMIN (A) Impedance (Ohm) 100 10 I = 150A CL=1F 20 1 10 0 I = 1mA 0.1 100 6/16 30 -40 1000 10000 Frequency (Hz) 100000 1000000 DocID018817 Rev 4 -20 0 25 50 TEMP ( C) 85 105 125 LM4041 Typical performance characteristics Figure 6. Startup characteristics Figure 7. Startup measure circuit R 18 K IK VK Pulse Generator f=100 KHz AM09375v1 Figure 8. Wideband noise voltage AM09376v1 1200 Noise [nV/sqr (Hz)] 1000 800 600 400 200 0 10 100 1000 10000 100000 Frequency (Hz) DocID018817 Rev 4 7/16 16 Package mechanical data 5 LM4041 Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK(R) packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions, and product status are available at: www.st.com. ECOPACK is an ST trademark. Figure 9. SOT23-3L dimensions 7110469_B 8/16 DocID018817 Rev 4 LM4041 Package mechanical data Table 5. SOT23-3L mechanical data mm. Dim. Min. Typ. Max. A 0.89 1.12 A1 0.01 0.10 A2 0.88 b 0.30 0.50 c 0.08 0.20 D 2.80 E 2.10 E1 1.20 0.95 2.90 1.30 0.95 e1 1.90 0.40 0.50 L1 k 3.04 2.64 e L 1.02 1.40 0.60 0.54 0 8 DocID018817 Rev 4 9/16 16 Package mechanical data LM4041 Figure 10. SOT323-5L dimensions 7091413/E 10/16 DocID018817 Rev 4 LM4041 Package mechanical data Table 6. SOT323-5L mechanical data mm. Dim. Min. Typ. Max. A 0.80 1.10 A1 0 0.10 A2 0.80 b 0.15 0.30 c 0.10 0.22 D 1.80 2 2.20 E 1.80 2.10 2.40 E1 1.15 1.25 1.35 0.90 e 0.65 e1 1.30 L 0.26 < 0 0.36 1 0.46 8 DocID018817 Rev 4 11/16 16 Packaging mechanical data 6 LM4041 Packaging mechanical data Figure 11. Tape and reel SOT23-3L and SOT323-5L mechanical drawing 12/16 DocID018817 Rev 4 LM4041 Packaging mechanical data Table 7. Tape and reel SOT23-3L mechanical data mm Dim. Min. Typ. A Max. 180 C 12.8 D 20.2 N 60 13.0 T 13.2 14.4 Ao 3.13 3.23 3.33 Bo 3.07 3.17 3.27 Ko 1.27 1.37 1.47 Po 3.9 4.0 4.1 P 3.9 4.0 4.1 Table 8. SOT323-5L mechanical data mm. Dim. Min. Typ. Max. A 175 180 185 C 12.8 13 13.2 D 20.2 N 59.5 60 60.5 T 14.4 Ao 2.25 Bo 2.7 Ko 1.2 Po 3.9 4 4.1 P 3.8 4 4.2 DocID018817 Rev 4 13/16 16 Order codes 7 LM4041 Order codes Table 9. Order codes Order codes Precision LM4041AICT-1.2 0.1% LM4041BICT-1.2 0.2% Packages Operating temperature range Marking L2 SOT323-5L Industrial - 40 to + 85 C L2 LM4041CICT-1.2 0.5% LM4041DICT-1.2 1% L26 LM4041AILT-1.2 0.1% L23 LM4041BILT-1.2 0.2% SOT23-3L Industrial - 40 to + 85 C L25 L24 LM4041CILT-1.2 0.5% LM4041DILT-1.2 1% L26 LM4041AECT-1.2 0.1% E2 LM4041BECT-1.2 0.2% SOT323-5L Extended - 40 to + 125 C L25 E2 LM4041CECT-1.2 0.5% LM4041DECT-1.2 1% E26 LM4041AELT-1.2 0.1% E23 LM4041BELT-1.2 0.2% SOT23-3L LM4041CELT-1.2 0.5% LM4041DELT-1.2 1% 14/16 Extended - 40 to + 125 C E25 E24 E25 E26 DocID018817 Rev 4 LM4041 8 Revision history Revision history Table 10. Document revision history Date Revision 09-May-2011 1 Initial release. 05-Dec-2011 2 Changed maturity code and updated Table 9 on page 14. 25-Jul-2012 3 Added: marking order codes Table 9 on page 14. 4 Part number LM4041xx changed to LM4041. Updated Table 1: Absolute maximum ratings, Section 1: Pin configuration and Section 5: Package mechanical data. Added Section 6: Packaging mechanical data. Minor text changes. 18-Feb-2014 Changes DocID018817 Rev 4 15/16 16 LM4041 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries ("ST") reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST's terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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