L78XX STMICROELECTRONICS | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 56
Technical content
Datasheet sections
- 1 Diagram
- 2 Pin configuration
- 3 Maximum ratings
- 4 Test circuits
- 5 Electrical characteristics
- 6 Application information
- 6.1 Design consideration
- 7 Typical performance
- 8 Package mechanical data
- 9 Order codes
- 10 Revision history
Features
■ Output current up to 1.5 A ■ Output voltages of 5; 6; 8; 8.5; 9; 12; 15; 18; 24 V ■ Thermal overload protection ■ Short circuit protection ■ Output transition SOA protection ■ 2 % output voltage tolerance (A version) ■ Guaranteed in extended temperature range (A version)
Description
The L78xx series of three-terminal positive regulators is available in TO-220, TO-220FP , TO- 3, D²PAK and DPAK packages and several fixed output voltages, making it useful in a wide range of applications. These regulators can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. Each type employs internal current limiting, thermal shut-down and safe area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1 A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltage and currents. TO-220FP TO-3 TO-220 D²PAKDPAK Table 1. Device summary
1 Diagram
Figure 1. Block diagram
2 Pin configuration
Figure 2. Pin connections (top view) Figure 3. Schematic diagram
3 Maximum ratings
Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these condition is not implied. Table 2. Absolute maximum ratings Table 3. Thermal data Figure 4. Application circuits
4 Test circuits
Figure 5. DC parameter Figure 6. Load regulation Figure 7. Ripple rejection
5 Electrical characteristics
CO = 0.1 µF unless otherwise specified. Table 4. Electrical characteristics of L7805
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 5. Electrical characteristics of L7805A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 6. Electrical characteristics of L7806A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 7. Electrical characteristics of L7808A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 8. Electrical characteristics of L7809A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 9. Electrical characteristics of L7812A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 10. Electrical characteristics of L7815A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 11. Electrical characteristics of L7824A
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 12. Electrical characteristics of L7805C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 13. Electrical characteristics of L7806C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 14. Electrical characteristics of L7808C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
CO = 0.1 µF unless otherwise specified. Table 15. Electrical characteristics of L7885C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 16. Electrical characteristics of L7809C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 17. Electrical characteristics of L7810C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 18. Electrical characteristics of L7812C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 19. Electrical characteristics of L7815C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 20. Electrical characteristics of L7818C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 21. Electrical characteristics of L7820C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
Table 22. Electrical characteristics of L7824C
- Load and line regulation are spec ified at constant junction temperature. Changes in VO due to heating effects must be
taken into account separately. Pulse testing with low duty cycle is used.
6 Application information
6.1 Design consideration
drops since the regulator has no external sense lead. arrangement is 2 V greater than the regulator voltage. Therefore a four ampere plastic power transistor is specified.
- To specify an output voltage, substitute voltage value for "XX".
- Although no output capacitor is need for stabil ity, it does improve transient response.
- Required if regulator is locate an appr eciable distance from power supply filter.
Figure 8. Fixed output regulator
external diode by-passes the current from the IC to ground. Figure 28. Protection against input s hort-circuit with high capacitance loads
7 Typical performance
Figure 29. Dropout voltage vs. junction Figure 30. Peak output current vs. Figure 31. Supply voltage rejection vs. Figure 32. Output voltage vs. junction Figure 33. Output impedance vs. frequency Figure 34. Quiescent current vs. junction
8 Package mechanical data
specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. In spite of some difference in tolerances, the packages are compatible. Table 23. TO-220 mechanical data
Note: 1 Maximum resin gate protrusion: 0.5 mm.
2 Resin gate position is accepted in each of the two positions shown on the drawing, or their
Figure 38. Drawing dimension TO-220 (type STD-ST Dual Gauge)
Figure 39. Drawing dimension TO -220 (type STD-ST Single Gauge)
Figure 42. Drawing dimension TO-220FP
Table 24. TO-220FP mechanical data
Figure 43. Drawing dimension TO-3 Table 25. TO-3 mechanical data
Figure 44. Drawing dimension DPAK
Table 26. DPAK mechanical data
Figure 45. Drawing dimension tape and reel for DPAK Table 27. Tape and reel DPAK mechanical data
Figure 46. Drawing dimension D²PAK (type STD-ST)
Figure 47. Drawing dimension D²PAK (type WOOSEOK-Subcon.)
ST's package suggested footprint. Table 28. D²PAK mechanical data Type STD-ST Type WOOSEOK-Subcon.
Figure 48. D²PAK footprint recommended data Table 29. D²PAK footprint data
Table 30. Tape and reel D²PAK mechanical data Figure 49. Drawing dimension tape and reel for D²PAK
9 Order codes
Table 31. Order codes
Table 32. Document revision history 21-Jun-2004 12 Document updating. 03-Aug-2006 13 Order codes has been updated and new template. 19-Jan-2007 14 D²PAK mechanical data has been updated and add footprint data. 31-May-2007 15 Order codes has been updated. 29-Aug-2007 16 Added Table 1 in cover page. 11-Dec-2007 17 Modified: Table 31. and Table 23 on page 39. Modified: Table 31 on page 54. DPAK mechanical data on page 48. Modified: Table 31 on page 54. 04-Mar-2010 21 Added notes Figure 38 on page 40. 08-Sep-2010 22 Modified Table 31 on page 54.