L4949EDTRWTR STMicroelectronics, L4949EDTRWTR Datasheet

IC VREG VLDO MULTIFUNCT SO-8

L4949EDTRWTR

Manufacturer Part Number
L4949EDTRWTR
Description
IC VREG VLDO MULTIFUNCT SO-8
Manufacturer
STMicroelectronics
Datasheet

Specifications of L4949EDTRWTR

Regulator Topology
Positive Fixed
Voltage - Output
5V
Voltage - Input
Up to 28V
Voltage - Dropout (typical)
0.3V @ 100mA
Number Of Regulators
1
Current - Output
100mA
Current - Limit (min)
120mA
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-SOIC (3.9mm Width)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

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Part Number:
L4949EDTRWTR
Manufacturer:
ST
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Features
Description
The L4949E is a monolithic integrated 5V voltage
regulator with a very low dropout output and
additional functions as power-on reset and input
voltage sense. It is designed for supplying the
microcomputer controlled systems especially in
automotive applications.
November 2009
Operating DC supply voltage range 5 V - 28 V
Transient supply voltage up to 40V
Extremely low quiescent current in standby
mode
High precision standby output voltage 5V±1%
Output current capability up to 100mA
Very low dropout voltage less than 0.5V
Reset circuit sensing the output voltage
Programmable reset pulse delay with external
capacitor
Voltage sense comparator
Thermal shutdown and short circuit protections
Doc ID 4275 Rev 6
Table 1.
SO-20W
Package
SO-8
Multifunction very low drop
SO-8
Device summary
L4949ED
L4949EP
Tube
voltage regulator
SO-20W (12+4+4)
Order codes
L4949ED013TR
L4949EP013TR
Tape and reel
L4949E
www.st.com
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1

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L4949EDTRWTR Summary of contents

Page 1

Features ■ Operating DC supply voltage range ■ Transient supply voltage up to 40V ■ Extremely low quiescent current in standby mode ■ High precision standby output voltage 5V±1% ■ Output current capability up to ...

Page 2

Contents Contents 1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Electrical specifications ...

Page 3

L4949E List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 4

List of figures List of figures Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...

Page 5

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) ...

Page 6

Block diagram and pin description Table 2. Pin definitions and functions Pin N° SO-8 SO- 14, 5 15, 16 ...

Page 7

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 ...

Page 8

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 ...

Page 9

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 ...

Page 10

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 ...

Page 11

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 ...

Page 12

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 ...

Page 13

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 ...

Page 14

Application information Figure 8. Waveforms 14/19 Doc ID 4275 Rev 6 L4949E ...

Page 15

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 ...

Page 16

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 ...

Page 17

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 ...

Page 18

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: ...

Page 19

... 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. ...

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