L4976D STMicroelectronics, L4976D Datasheet
L4976D
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L4976D Summary of contents
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Features ■ step down converter ■ Operating input voltage from 8v to 55v ■ Precise 5.1V reference voltage ■ Output voltage adjustable from 0.5V to 50V ■ Switching frequency adjustable up to 300kHz ■ Voltage feedforward ■ ...
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Contents Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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L4976 1 Block diagram Figure 2. Block diagram THERMAL SHUTDOWN REF REF 7 COMP 8 FB 3.3V OSCILLATOR VOLTAGES MONITOR INTERNAL REFERENCE 5.1V 3.3V E/A PWM OSC GND Block diagram V CC ...
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Pin settings 2 Pin settings 2.1 Pin connection Figure 3. Pin connection (top view) GND REF OSC 3 OUT 4 2.2 Pin description Table 1. Pin description N° Pin DIP8 SO16W ...
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L4976 3 Electrical data 3.1 Maximum ratings Table 2. Absolute maximum ratings Symbol DIP8 S016W V5 V11 V4 V5 I5, I6 V6-V5 V12-V11 V6 V12 V7 V13 V8 V14 P TOT STG 3.2 Thermal data ...
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Electrical characteristics 4 Electrical characteristics Table 5. Electrical characteristics (T = 25° 2.7nF OSC OSC Symbol Parameter Dynamic characteristic V Operating input voltage range I V Output voltage O Vd Dropout voltage Maximum limiting current I ...
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L4976 Table 5. Electrical characteristics (continued 25° 2.7nF OSC OSC Symbol Parameter DC Characteristics Total operating quiescent current I qop Quiescent current I q Error Amplifier V Voltage feedback input FB R Line regulation ...
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Typical charcteristics 5 Typical charcteristics Figure 4. Quiescent drain current vs. input voltage Iq (mA Tamb=25˚ Figure 6. Quiescent current vs. junction ...
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L4976 Figure 8. Load regulation V O (V) 3.377 3.376 3.375 3.374 3.373 3.372 3.371 3.370 Figure 10. Switching frequency vs. junction temperature fsw (KHz) 105 100 95 ...
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Typical charcteristics Figure 14. Efficiency vs output voltage η (%) Figure 16. Efficiency vs. output current η (%) 0.0 0.2 0.4 ...
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L4976 Figure 20. Power dissipation vs. V Pdiss (mW) 800 600 400 200 Figure 22. Line transient 1ms/DIV Figure 21. Load transient CC D97IN743 V =5.1V O fsw=100KHz I ...
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Package mechanical data 6 Package mechanical data 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 package ...
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L4976 Figure 24. DIP8 mechanical data & package dimensions mm DIM. MIN. TYP. A 3.32 a1 0.51 B 1.15 b 0.356 b1 0.204 D E 7.95 e 2.54 e3 7. 3.18 Z inch MAX. MIN. ...
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Package mechanical data Figure 25. SO16Wide mechanical data & package dimensions mm DIM. MIN. TYP. A 2.35 A1 0.10 B 0.33 C 0.23 (1) 10. 7.40 e 1.27 H 10.0 h 0.25 L 0.40 k ddd (1) “D” ...
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... L4976 7 Order code Table 6. Order code Part number L4976 L4976D L4976D013TR Package DIP8 SO16W SO16W Tape and reel Order code Packaging Tube Tube 15/17 ...
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Revision history 8 Revision history Table 7. Revision history Date 5-Aug-2001 3-Apr-2007 16/17 Revision 6 First Issue Document reformatted, updated dropout voltage values in 7 page 6 L4976 Changes Table 5 on ...
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... L4976 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. ...