BD820F50EFJ-CE2 ROHM

Datasheet LDO Regulators with Watchdog Timer and Voltage Detector 200 mA Output LDO Regulator for Automotive with WDT and Voltage Detector BD820F50EFJ-C General Description Key Specifications BD820F50EFJ-C is a regulator with a high withstand Wide Temperature Range (Tj): -40 C to +150 C voltage of 45 V. And it integrates a reset (RESET) that Wide Input Voltage Range: -0.3 V to +45 V monitors its output and a watchdog timer (WDT). Low Quiescent Current: 6 A (Typ) The quiescent current is low while the output current is Output Current Capability: 200 mA (Max) 200 mA. Output Voltage: 5.0 V (Typ) The reset signal is output when the output of the regulator falls below 4.2 V (Typ). Package W (Typ) x D (Typ) x H (Max) The reset delay time and watchdog monitor time can HTSOP-J8 4.90 mm x 6.00 mm x 1.00 mm be adjusted by the external capacitor. Feature (Note 1) AEC-Q100 Qualified Qualified for Automotive Applications Low ESR Ceramic Capacitors Applicable for Output Low Dropout Voltage: PDMOS Output Transistor Integrated Power On and Under-voltage Reset Adjustable Reset Delay Time and Watchdog Time by External Capacitor Integrated Over Current Protection (OCP) Integrated Thermal Shutdown (TSD) (Note 1) Grade 1 HTSOP-J8 Applications Power Train System Body Control Unit Car Audio System Car Navigation System Typical Application Circuit External Components (Note 2) Capacitor : 0.1 F C (Min), 6 F C (Min), 0.047 F C 10 F IN OUT CT Resistor: 5.1 k (Min) RRO (Note 2) Electrolytic, tantalum and ceramic capacitors can be used. VCC VO Input Voltage Output Voltage R RO N.C. RO Reset Output C C IN O CT GND C CT CLK INH Inhibit Signal Clock Signal Product structure : Silicon integrated circuit This product has no designed protection against radioactive rays .w ww.rohm.com TSZ02201-0JAJ0AN00020-1-2 2018 ROHM Co., Ltd. All rights reserved. 1/38 TSZ22111 14 001 17.Dec.2018 Rev.001 BD820F50EFJ-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 (Note 2) Thermal Resistance ............................................................................................................................................................... 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 (Note 1) I/O Equivalence Circuit ......................................................................................................................................................... 33 Operational Notes ......................................................................................................................................................................... 34 1. Reverse Connection of Power Supply ............................................................................................................................ 34 2. Power Supply Lines ........................................................................................................................................................ 34 .w ww.rohm.com TSZ02201-0JAJ0AN00020-1-2 2018 ROHM Co., Ltd. All rights reserved. 2/38 17.Dec.2018 Rev.001 TSZ22111 15 001