L4949ED STMicroelectronics, L4949ED Datasheet
L4949ED
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L4949ED Summary of contents
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... It is designed for supplying the microcomputer controlled systems especially in automotive applications. November 2009 Multifunction very low drop SO-8 Table 1. Device summary Package SO-8 SO-20W Doc ID 4275 Rev 6 L4949E voltage regulator SO-20W (12+4+4) Order codes Tube Tape and reel L4949ED L4949ED013TR L4949EP L4949EP013TR 1/19 www.st.com 1 ...
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Contents Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications ...
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L4949E 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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L4949E 1 Block diagram and pin description Figure 1. Block diagram Note: The block diagram illustrates only a major internal device functionality and it is not intended to mimic any details of hardware design Figure 2. Configuration diagram (top view) ...
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Block diagram and pin description Table 2. Pin definitions and functions Pin N° SO-8 SO- 14, 5 15, 16 ...
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L4949E 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol V DC operating supply voltage SDC V Transient supply voltage (T < 1s) STR I Output current O V Output voltage Output ...
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Electrical specifications 2.3 Electrical characteristics -40 °C < Table 5. Electrical characteristics Symbol Parameter V Output voltage O V Output voltage O V Output voltage O V Dropout voltage DP Input to output voltage ...
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L4949E Table 7. Sense Symbol Parameter V Sense low threshold st V Sense threshold hysteresis sth V Sense output low voltage SL I Sense output leakage SH I Sense input current SI Table 8. Preregulator Symbol Parameter V Preregulator output ...
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Application information 3 Application information Figure 3. Application circuit ≥ 1µ For stability Recommended for application: C 3.1 Supply voltage transient High supply voltage transients can cause a reset output signal disturbance. For supply voltages greater ...
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L4949E required. The modular approach of this device allows to get easily also other features and functions when required. 3.3 Voltage regulator The voltage regulator uses an Isolated Collector Vertical PNP transistor as a regulating element. Figure 4. Foldback characteristic ...
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Application information Figure 5. Output voltage vs input voltage Figure 6. Quiescent current vs supply voltage 3.4 Preregulator To improve the transient immunity a preregulator stabilizes the internal supply voltage This internal voltage is present at Pin ...
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L4949E 3.5 Reset circuit The block circuit diagram of the reset circuit is shown in supervises the output voltage. The reset threshold of 4 defined with the internal reference voltage and standby output drivider. The reset pulse delay ...
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Application information Figure 8. Waveforms 14/19 Doc ID 4275 Rev 6 L4949E ...
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L4949E 4 Package and packing information ® 4.1 ECOPACK In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status ...
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Package and packing information Figure 9. SO-8 TP package dimensions 4.3 SO-20 TP package information Table 10. SO-20 TP mechanical data Dim 16/19 mm Min. Typ. 2.35 0.1 0.33 0.23 12.6 7.4 ...
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L4949E Table 10. SO-20 TP mechanical data (continued) Dim Figure 10. SO20 TP package dimensions Package and packing information mm Min. Typ. 0.25 0.4 0 (min.)8 (max.) Doc ID 4275 Rev 6 Max. 0.75 1.27 17/19 ...
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Revision history 5 Revision history Table 11. Document revision history Date 01-Jun-2000 25-Nov-2009 18/19 Revision 1 Initial release. Reformatted entire document. Removed Minidip package. Added Table 2: Pin definitions and 6 Updated Table 3: Absolute maximum ratings Updated Figure 1: ...
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... L4949E 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. ...