BD820F50EFJ-C BD820F5UEFJ-C
Contents
General Description........................................................................................................................................................................1
Feature ...........................................................................................................................................................................................1
Applications ....................................................................................................................................................................................1
Key Specifications ..........................................................................................................................................................................1
Package
W (Typ) x D (Typ) x H (Max) ................................................................................................................1
Typical Application Circuit...............................................................................................................................................................1
Pin Configurations ..........................................................................................................................................................................4
Pin Descriptions..............................................................................................................................................................................4
Block Diagram ................................................................................................................................................................................5
Description of Blocks ......................................................................................................................................................................6
Absolute Maximum Ratings ............................................................................................................................................................7
Thermal Resistance(Note 2) ...............................................................................................................................................................7
Operating Conditions......................................................................................................................................................................8
Electrical Characteristics.................................................................................................................................................................9
For All Function ...........................................................................................................................................................................9
LDO Function..............................................................................................................................................................................9
Reset, WDT Function................................................................................................................................................................10
Typical Performance Curves.........................................................................................................................................................11
Figure 1. Circuit Current vs Supply Voltage...............................................................................................................................11
Figure 2. Circuit Current vs Supply Voltage...............................................................................................................................11
Figure 3. Circuit Current vs Junction Temperature ....................................................................................................................11
Figure 4. Circuit Current vs Output Current...............................................................................................................................11
Figure 5. Output Voltage vs Supply Voltage..............................................................................................................................12
Figure 6. Output Voltage vs Supply Voltage..............................................................................................................................12
Figure 7. Output Voltage vs Junction Temperature ...................................................................................................................12
Figure 8. Output Voltage vs Output Current ..............................................................................................................................12
Figure 9. Drop Voltage vs Output Current .................................................................................................................................13
Figure 10. Ripple Rejection vs Frequency.................................................................................................................................13
Figure 11. Output Voltage vs Junction Temperature..................................................................................................................13
Figure 12. Reset Voltage vs Output Voltage..............................................................................................................................14
Figure 13. Reset Voltage vs Output Voltage..............................................................................................................................14
Figure 14. Reset Voltage vs Junction Temperature...................................................................................................................14
Figure 15. CT Current vs Junction Temperature........................................................................................................................14
Figure 16. CT Voltage vs Junction Temperature........................................................................................................................15
Figure 17. Delay Time vs Junction Temperature .......................................................................................................................15
Figure 18. Delay Time vs CT Capacitance................................................................................................................................15
Figure 19. WDT Time vs Junction Temperature ........................................................................................................................15
Figure 20. WDT Monitor Time vs CT Capacitance ....................................................................................................................16
Figure 21. Delay Time vs CT Capacitance................................................................................................................................16
Figure 22. CLK Input Current vs CLK Voltage...........................................................................................................................16
Figure 23. INH Input Current vs INH Voltage ............................................................................................................................16
Figure 24. RO Current vs RO Voltage.......................................................................................................................................17
Measurement Circuit for Typical Performance Curves .................................................................................................................18
Timing Chart .................................................................................................................................................................................20
VCC ON/OFF............................................................................................................................................................................20
CLK ON/OFF.............................................................................................................................................................................22
INH ON/OFF 1 ..........................................................................................................................................................................23
INH ON/OFF 2 ..........................................................................................................................................................................24
Application and Implementation....................................................................................................................................................25
Selection of External Components............................................................................................................................................25
Input Pin Capacitor................................................................................................................................................................25
Output Pin Capacitor .............................................................................................................................................................25
Typical Application and Layout Example ...................................................................................................................................27
Surge Voltage Protection for Linear Regulators.....................................................................................................................28
Positive surge to the input..................................................................................................................................................28
Negative surge to the input ................................................................................................................................................28
Reverse Voltage Protection for Linear Regulators.................................................................................................................28
Protection Against Reverse Input /Output Voltage .............................................................................................................28
Protection Against Input Reverse Voltage..........................................................................................................................29
Protection Against Reverse Output Voltage when Output Connect to an Inductor ................................................................30
Power Dissipation.........................................................................................................................................................................31
Thermal Design ............................................................................................................................................................................32
Calculation Example .................................................................................................................................................................32
I/O Equivalence Circuit(Note 1).........................................................................................................................................................33
Operational Notes.........................................................................................................................................................................34
1.
2.
Reverse Connection of Power Supply............................................................................................................................34
Power Supply Lines........................................................................................................................................................34
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TSZ02201-0JAJ0AN00020-1-2
9.Nov.2021 Rev.002
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