l4995r STMicroelectronics, l4995r Datasheet

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... The L4995A features the externally programmable Reset and Enable. ■ Finally the L4995R features the externally programmable Reset. The combination of such features makes this device particularly flexible and suitable to supply microprocessor systems in automotive applications. Order codes ...

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Contents Contents 1 Block diagrams and pins descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications . . ...

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L4995 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

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... List of figures List of figures Figure 1. Block diagram of L4995 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 2. Block diagram of L4995A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Figure 3. Block diagram of L4995R . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4. Pins configurations (L4995 Figure 5. Output voltage vs Figure 6. Output voltage vs Figure 7. Drop Voltage vs. Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 8. Current consumption vs. Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 9. Current consumption vs. Input Voltage Figure 10 ...

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L4995 1 Block diagrams and pins descriptions Figure 1. Block diagram of L4995 VEn Icw Vcw Vwi Figure 2. Block diagram of L4995A VEn Vs Start up Voltage En Reference ...

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... Block diagrams and pins descriptions Figure 3. Block diagram of L4995R VEn Table 2. Pins descriptions Pin PowerSSO-12 name pin # Gnd Gnd Res Vcr Vcw 6/33 Vs Start up Voltage Reference 100mV + _ Vcr GND Vcr PowerSSO-24 pin # Enable input (L4995 and L4996A only, otherwise not connected) ...

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L4995 Table 2. Pins descriptions (continued) Pin PowerSSO-12 name pin # Figure 4. Pins configurations (L4995) PowerSSO-24 pin # Watchdog input (L4995 only, otherwise not connected the frequency at this input pin ...

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... These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 3. ...

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L4995 2.2 Thermal data For details, please refer to PowerSSO-24™ thermal mm Table 4. Thermal data Symbol Thermal resistance Junction to Ambient: R PowerSSO-12 thj-case PowerSSO-24 Thermal resistance Junction to Ambient: R PowerSSO-12 thj-amb PowerSSO-24 1. The values quoted are ...

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Electrical specifications Table 5. General (continued) Pin Symbol Vs qn_150 Vs qn_250 Vs qn_500 Tw Tw_hy 1. See Figure 27. 2. Measured output current when the output voltage has dropped 100mV from its nominal ...

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L4995 Table 7. Watchdog Pin Symbol Wi Vih Wi Vil Wi Vih Wi Iwi Vcw Vwlth Vcw Vwhth Vcw Icwc Vcw Icwd Vcw Twop Res twol Table 8. Enable Pin Symbol En V En_low En V En_high En V En_hyst ...

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Electrical specifications 2.4 Electrical characteristics curves Figure 5. Output voltage vs. Tj Vo_ref (V) 5,5 Vs= 13.5V 5 250mA 5,3 5,2 5,1 5 4,9 4,8 4,7 4,6 4,5 -50 - Tj(°C ) Figure 7. ...

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L4995 Figure 11. Current limitation vs. Input Voltage Ilim (mA) 1200 1150 1100 1050 1000 950 900 850 800 Tj = 125 °C 750 700 650 600 550 500 Figure 13. Output ...

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Electrical specifications Figure 17. Vrlth vs. Tj Vrlth (% Vo_ref) 50 Vs= 5.6V to 31V -50 - Tj(°C ) Figure 19. Vwlth vs. Tj Vwlth (% Vo_ref) 50 Vs= 5.6V to 31V ...

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L4995 Figure 23. PSRR C = 4.7 µF 0 0,10 1,00 10,00 100,00 FREQUENCY [KHz] 2.5 Test circuit and waveforms plot 2.5.1 Load regulation Figure 24. Load regulation test circuit Figure 25. Maximum load variation response PSRR [dB] 80,00 70,00 ...

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Application information 3 Application information Figure 26. L4995 application schematic Vcw Vcw Ctw Ctw Wi Wi Vcr Vcr Ctr Ctr Note: The input capacitor Cs > 200nF is necessary for the smoothing of line ...

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L4995 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 with ...

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Application information 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 ...

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L4995 4 Package and PCB thermal data 4.1 PowerSSO-12™ thermal data Figure 30. PowerSSO-12™ PC board Note: Layout condition of R area= 77mm x 86mm,PCB thickness=1.6mm, Cu thickness=70µm (front and back side) Thermal vias separation 1.2 mm, Thermal via diameter ...

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Package and PCB thermal data Figure 32. PowerSSO-12™ thermal impedance junction ambient single pulse ZTH (°C/W) 100 10 1 0,1 0,0001 0,001 Equation 1: pulse calculation formula ⋅ THδ TH where δ Figure ...

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L4995 Table 9. PowerSSO-12™ 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 0.45 1. ...

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Package and PCB thermal data 4.2 PowerSSO-24™ thermal data Figure 34. PowerSSO-24™ PC board Note: Layout condition of R area= 77mm x 86mm,PCB thickness=1.6mm, Cu thickness=70µm (front and back side) Thermal vias separation 1.2 mm, Thermal via diameter 0.3 mm ...

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L4995 Figure 36. PowerSSO-24™ thermal impedance junction ambient single pulse ZTH (°C/W) 100 10 1 0,1 0,0001 0,001 Equation 2: pulse calculation formula ⋅ THδ TH where δ Figure 37. Thermal fitting model ...

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Package and PCB thermal data Table 10. PowerSSO-24™ 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) 24/ Footprint ...

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L4995 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 the ...

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Package and packing information Table 11. PowerSSO-12™ mechanical data Symbol ddd 26/33 Millimeters Min. Typ. 1.250 0.000 1.100 0.230 0.190 4.800 3.800 0.800 5.800 0.250 0.400 ...

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L4995 Figure 39. PowerSSO-24™ package dimensions Table 12. PowerSSO-24™ mechanical data Symbol Package and packing information Millimeters Min. Typ. 2.15 2.15 0 0.33 0.23 10.1 7.4 0.8 8.8 Max. 2.47 ...

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Package and packing information Table 12. PowerSSO-24™ mechanical data Symbol 28/33 Millimeters Min. Typ. 10.1 5° 0.55 4.1 6.5 L4995 Max. 0.06 10.5 0.4 0.85 10° 4.7 7.1 ...

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L4995 5.2 PowerSSO-12™ packing information Figure 40. PowerSSO-12™ tube shipment (no suffix) A Figure 41. PowerSSO-12™ tape and reel shipment (suffix “TR”) TAPE DIMENSIONS According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb. 1986 Tape width Tape Hole ...

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Package and packing information 5.3 PowerSSO-24™ packing information Figure 42. PowerSS0- Figure 43. PowerSSO-24 TAPE DIMENSIONS According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb. 1986 Tape width Tape Hole Spacing Component Spacing Hole Diameter Hole ...

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... Table 13. Document revision history Date 26-May-2006 05-Jan-2007 18-May-2007 09-Jul-2007 Revision 1 Initial release. L4995A and L4995R versions added: Features section updated and table added. Table 1: Device summary Table 5: Electrical characteristics Figure 2: Block diagram of L4995A L4995R added. Table 2: Pins descriptions 2 Table 4: Thermal data ...

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Revision history Table 13. Document revision history (continued) Date 09-Aug-2007 07-Dec-2007 32/33 Revision Updated Table 2: Pins descriptions 5 Updated Table 12: PowerSSO-24™ mechanical data Updated Section 2.2: Thermal data – corrected note changing single layer with double layer. Updated ...

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... L4995 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. ...