l4993 STMicroelectronics, l4993 Datasheet
l4993
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l4993 Summary of contents
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... Tube L4993D L4993MD Rev 5 L4993 Low drop voltage regulator Preliminary Data SO-8 SO- monolithic integrated 5V Voltage is protected against short circuit and is active when the Enable is high. L4993 Order codes Tape & reel L4993DTR L4993MDTR 1/23 www.st.com 23 ...
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... Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.1 Voltage regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.2 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.3 Watchdog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 Package and PCB thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.1 SO-8 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.2 SO-20 thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5 Package and packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.1 ECOPACK® packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.2 SO-8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 5.3 SO-20 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 5.4 SO-8 Packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 5.5 SO-20 Packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2/23 L4993 ...
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... L4993 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pins description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Table 4. Thermal data Table 5. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 6. SO-8 Thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Table 7. SO-20 Thermal parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Table 8. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 List of tables 3/23 ...
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... SO-20 Thermal fitting model of a single channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Figure 14. SO-8 Package mechanical data & package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 15. SO-20 Package mechanical data & package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 16. SO-8 Tube shipment (no suffix Figure 17. SO-8 Tape and reel shipment (suffix “TR”). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 18. SO-20 Tube shipment (no suffix Figure 19. SO-20 Tape and reel shipment (suffix “TR”). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 4/23 L4993 ...
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... L4993 1 Block diagram and pins description Figure 1. Block diagram Vcw Vcw Ctw Ctw Wi Wi WEn WEn Vcr Vcr Ctr Ctr Block diagram and pins description Therma l Therma l protection protection watchdog watchdog Voltage reference Voltage reference reset reset 5V, 150 mA 5V, 150 mA ...
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... Supply voltage 8 20 Block to ground directly at IC pin with a capacitor 12, Not connected 13, 18 Vos 6 Wi Vcw 5 Function WEn N. GND 16 GND GND Res N. N.C. 12 Vcr 10 11 L4993 Vs N.C. N.C. Vos GND GND Wi N.C. N.C. Vcw ...
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... L4993 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol V DC supply voltage Vsdc I Input current Vsdc V DC output voltage output current Vo V Watchdog input voltage Wi V Open drain output voltage od I Open drain output current od V Reset delay voltage ...
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... 150mA Test condition min typ 4.9 5.0 (1) 150 280 150 320 200 (2) 55 1.45 538 120 79 150 10 = 5kΩ to Vo, ext = 5V Res L4993 max Unit 5.1 V 4000 mA 500 400 1000 µA 180 µA 125 µA 190 °C °C 0.4 V µ ...
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... L4993 Table 5. Electrical characteristics (continued) Pin Symbol Vcr Vrlth Vcr Vrhth Vcr Icr Vcr Idr Res Trr_2 Res Trd Watchdog Wi Vih Wi Vil Wi Vih_hyst Wi Ii Vcw Vwhth Vcw Vwlth Vcw Icwc Vcw Icwd Vcw Twop Res twol Watchdog Enable WEn V En_l WEn ...
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... This delay is obtained by 512 periods of oscillator. The oscillator period is given by : and reset pulse delay trd is given by: where internally generated charge current, µ Icr = 17 internally generated discharge current, µ Idr = 17.6 10/23 Vo Vo_ref Ishort Ilim Tosc = [(Vrhth-Vrlth) x Ctr] / Icr + [(Vrhth-Vrlth) x Ctr] / Idr trd = 512 x Tosc L4993 Iout ...
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... L4993 Vrhth = 2.35 V (typ) and Vrlth =0.65 V (typ) are two voltage thresholds Ctr is an external capacitance. Figure 4. Reset time diagram Wi Vo trr < Vcr Res 3.3 Watchdog The watchdog input Wi monitors a connected microcontroller. If pulses are missing, the Reset output pin is set to low. This functionality can be disabled setting WEn input to a level low ...
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... Cu thickness = 35µm , Copper areas: from minimum pad lay-out to 8cm Figure 7. SO-8 R 170 160 150 140 130 120 110 0 12/23 and Z measurements (PCB FR4 area= 58mm x 58mm, PCB th th Vs. PCB copper area in open box free air condition thj-amb 0,5 1 PCB Cu heatsink area (cm^2) 1,5 2 2,5 L4993 2 ) ...
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... L4993 Figure 8. SO-8 Thermal impedance junction ambient single pulse ZTH (°C/W) 1000 100 10 1 0,0001 0,001 Equation 1: pulse calculation formula ⋅ THδ TH where δ Figure 9. SO-8 Thermal fitting model of a single channel 0,01 0,1 Time (s) δ δ – THtp Package and PCB thermal data ...
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... Package and PCB thermal data Table 6. SO-8 Thermal parameter Area/island (cm R1 (°C/W) R2 (°C/W) R3 (°C/W) R4 (°C/W) R5 (°C/W) R6 (°C/W) C1 (W.s/°C) C2 (W.s/°C) C3 (W.s/°C) C4 (W.s/°C) C5 (W.s/°C) C6 (W.s/°C) 14/ Footprint 4.21 2. 0.00029 0.0024 0.03 0.04 0.1 1.05 L4993 ...
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... L4993 4.2 SO-20 thermal data Figure 10. SO-20 PC board Note: Layout condition of R thickness = 2mm, Cu thickness=35µm , Copper areas: from minimum pad lay-out to 8cm Figure 11. SO- and Z measurements (PCB FR4 area= 58mm x 58mm,PCB th th Vs. PCB copper area in open box free air condition ...
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... Figure 12. SO-20 Thermal impedance junction ambient single pulse ZTH (°C/W) 100 10 1 0,0001 0,001 Equation 2: pulse calculation formula ⋅ THδ TH where δ Figure 13. SO-20 Thermal fitting model of a single channel 16/23 0,01 0,1 Time (s) δ δ – THtp 1 10 100 1000 L4993 Footprint ...
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... L4993 Table 7. SO-20 Thermal parameter Area/island (cm R1 (°C/W) R2 (°C/W) R3 (°C/W) R4 (°C/W) R5 (°C/W) R6 (°C/W) C1 (W.s/°C) C2 (W.s/°C) C3 (W.s/°C) C4 (W.s/°C) C5 (W.s/°C) C6 (W.s/° Footprint 4.21 2.11 2 0.00029 0.0024 0.015 0.15 1.5 4 Package and PCB thermal data 17/23 ...
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... L4993 ® OUTLINE AND MECHANICAL DATA SO-8 0016023 D ...
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... L4993 5.3 SO-20 Package mechanical data Figure 15. SO-20 Package mechanical data & package outline DIM. MIN. A 2.35 A1 0.10 B 0.33 C 0.23 (1) 12. 7. 10.0 h 0.25 L 0.40 k ddd (1) “D” dimension does not include mold flash, protusions or gate burrs. Mold flash, protusions or gate burrs shall not exceed 0.15mm per side. ...
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... REEL DIMENSIONS Base Q.ty 2500 Bulk Q.ty 2500 A (max) 330 B (min) 1.5 C (± -0) 12.4 N (min (max) 18.4 All dimensions are in mm. No components Components No components 500mm min Empty components pockets 500mm min saled with cover tape. User direction of feed L4993 Start ...
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... L4993 5.5 SO-20 Packing information Figure 18. SO-20 Tube shipment (no suffix) C Figure 19. SO-20 Tape and reel shipment (suffix “TR”) Tape dimensions According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb. 1986 Tape width Tape Hole Spacing Component Spacing Hole Diameter Hole Diameter Hole Position Compartment Depth Hole Spacing All dimensions are in mm ...
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... Revision 1 Initial release. 2 Table and 8 updated Document put in corporate technical literature template. 3 Table 4 updated Table 5: Electrical characteristics 4 parameters updated List of tables and figures added. 5 Section 4: Package and PCB thermal data L4993 Changes : short lim q, rr2, ih_hist added. ...
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... L4993 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. ...