L4988MDTR STMicroelectronics, L4988MDTR Datasheet
L4988MDTR
Specifications of L4988MDTR
Related parts for L4988MDTR
L4988MDTR Summary of contents
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... State of the art features like reset and watchdog make this device particularly suitable to supply = -40°C to 150°C) j microprocessor systems in automotive applications. Tube L4988D L4988MD Rev 4 L4988 Low drop voltage regulator SO-8 SO-20 Order codes Tape & reel L4988DTR L4988MDTR 1/30 www.st.com 30 ...
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Contents Contents 1 Block diagram and pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . ...
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L4988 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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List of figures List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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L4988 1 Block diagram and pin configuration Figure 1. Block diagram WEn Thermal Thermal Thermal protection protection protection Watchdog Watchdog wi Voltage reference Voltage reference Voltage reference Voltage ...
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Block diagram and pin configuration Table 2. Pins description Pin SO8(D) name WEn Gnd Gnd Res Vcr Vcw N.C. Figure 2. Pins configuration WEn 1 2 GND Res 3 Vcr 4 6/30 S020(MD) Watchdog Enable input 1 ...
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L4988 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 ...
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Electrical specifications 2.3 Electrical characteristics V =5.6V to 31V Table 5. General Pin Symbol Vo V o_ref Vo I short ( lim Vs line Vo V load (3) Vs (3) Vs, ...
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L4988 Table 6. Reset Pin Symbol Res Vres_l Res I Res_h Res R_p_u Res Vo_th Vcr Vrlth Vcr Vrhth Vcr Icr Vcr Idr Res Trr_2 Res Trd 1. When Vo becomes lower than 4V, the reset reaction time decreases down ...
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Electrical specifications Table 8. Watchdog Enable Pin Symbol WEn V En_l WEn V En_h WEn V En_hy WEn I_leak 10/30 Parameter Test condition Enable input low voltage Enable input high voltage Enable input hysteresis Pull down current WEn = 5V ...
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L4988 2.4 Electrical characteristics curves Figure 3. Output voltage vs. Tj Vo_ref (V) 5,5 Vs= 13.5V 5 75mA 5,3 5,2 5,1 5 4,9 4,8 4,7 4,6 4,5 -50 - Tj(°C ) Figure 5. Drop ...
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Electrical specifications Figure 9. Current limitation vs. Input Voltage Ilim (mA) 400 375 °C 350 325 Tj = 125 °C 300 275 250 Figure 11. Short Circuit Current vs. ...
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L4988 Figure 15. Vrlth vs. Tj Vrlth (% Vo_ref) 50 Vs= 5.6V to 31V -50 - Tj(°C ) Figure 17. Vwlth vs. Tj Vwlth (% Vo_ref) 50 Vs= 5.6V to 31V ...
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Electrical specifications Figure 21. PSRR C = 4.7µ 100 FREQUENCY [KHz] 2.5 Test circuit and waveforms plot 2.5.1 Load regulation Figure 22. Load regulation test circuit Figure 23. Maximum load variation response 14/30 PSRR [dB] 80 ...
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L4988 3 Application information Figure 24. L4988 application schematic Vcw Ctw Wi WEn Vcr Ctr Note: The input capacitor Cs > 200nF is necessary for the smoothing of line disturbances. The output capacitor C01 > 100nF is ...
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Application information 3.2 Reset The reset circuit supervises the output voltage Vo. The Vo_th reset threshold is defined with the in-ternal reference voltage and a resistor output divider. If the output voltage becomes lower than Vo_th then Res goes low ...
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L4988 3.3 Watchdog A connected microcontroller is monitored by the watchdog input Wi. If pulses are missing, the Reset output pin is set to low. The pulse sequence time can be set within a wide range with the external capacitor, ...
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Package and PCB thermal data 4 Package and PCB thermal data 4.1 SO-8 thermal data Figure 28. SO-8 PC board Note: Layout condition of R thickness = 2mm, Cu thickness = 35µm , Copper areas: from minimum pad lay-out to ...
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L4988 Figure 30. 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 31. SO-8 thermal fitting ...
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Package and PCB thermal data Table 9. 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) 20/ Footprint ...
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L4988 4.2 SO-20 thermal data Figure 32. SO-20 PC board Note: Layout condition of R thickness = 2mm, Cu thickness=35µm , Copper areas: from minimum pad lay-out to 8cm Figure 33. SO- ...
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Package and PCB thermal data Figure 34. 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 35. ...
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L4988 Table 10. 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 ...
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Package and packing information 5 Package and packing information ® 5.1 ECOPACK In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second-level interconnect. The category of Second-Level Interconnect is marked on ...
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L4988 Table 11. SO-8 mechanical data Symbol ( ( ccc 1. Dimensions D does not include mold flash, protrusions or gate burrs. Mold flash, potrusions or gate ...
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Package and packing information 5.3 SO-20 package information Figure 37. SO-20 package dimensions Table 12. SO-20 mechanical data Symbol ( ddd 1. “D” dimension does not include mold flash, ...
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L4988 5.4 SO-8 packing information Figure 38. SO-8 tube shipment (no suffix) Figure 39. SO-8 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 ...
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Package and packing information 5.5 SO-20 packing information Figure 40. SO-20 tube shipment (no suffix) C Figure 41. SO-20 tape and reel shipment (suffix “TR”) Tape dimensions According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb. 1986 Tape ...
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L4988 6 Revision history Table 13. Document revision history Date 01-Jun-2007 30-Aug-2007 13-Feb-2008 04-Jun-2008 Revision 1 Initial release Added features table. Added list of tables and figures. 2 Updated Section 2.3: Electrical Added Section 4: Package and PCB thermal Added ...
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... 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. ...