BD3005HFP-TR ROHM

TECHNICAL NOTE Power Management LSI Series for Automotive Body Control Regulators with Voltage Detector and Watchdog Timer BD3004HFP,BD3005HFP z Description The BD3004HFP,BD3005HFP low bias current regulator and watchdog timer features a high 50 V breakdown voltage and is compatible with on-board vehicle microcontrollers. It offers an output current of 500 mA while limiting bias current to 80 A (Typ.). The series supports the use of ceramic capacitors as output phase compensation capacitors.The reset detection voltage can be changed by connecting a resistor to the Vs pin.BD3004HFPThe watchdog timer can be switched on and off using the INH pin input logic.BD3005HFP z Features 1) 5 V/500 mA regulators for microcontrollers BD3004HFP: Adjustable detection voltage (Vs pin) BD3005HFP:Built-in watchdog timer reset circuit (INH pin: watchdog timer on/off) 2) Super-low bias current: 80 A (Typ.) 3) Low-saturation voltage type P-channel DMOS output transistors 4) High precision output voltage: 5 V 2% 5) Low-ESR ceramic capacitors can be used as output capacitors 6) Vcc Maximum applied voltage: 50 V 7) Built-in overcurrent protection circuit and thermal shutdown circuit 8) Built-in reverse connection breakdown prevention circuit 9) Back current flow protection during sudden battery failures, making it a highly reliable 5 V regulator. 10) HRP7 package z Applications Onboard devices (Vehicle equipment, Car stereos, Satellite navigation systems, etc.) z Absolute maximum ratings (Ta = 25C) Parameter Symbol Limit Unit *1 Vcc applied voltage Vcc 15 to +50 V Vs pin voltage(BD3004HFP) Vs 0.3 to +15 V INH pin voltage(BD3005HFP) VINH 0.3 to +15 V Regulator output pin voltage VOUT 0.3 to +15 V Reset output pin voltage VRO 0.3 to +15 V Watchdog input pin voltage VCLK 0.3 to +15 V Reset delay setting pin voltage VCT 0.3 to +15 V Output current IOUT 500 mA *2 Power dissipation Pd 1.6 W Operating temperature range Topr 40 to +125 C Storage temperature range Tstg 55 to +150 C Maximum junction temperature Tjmax 150 C *1 Must not exceed Pd. *2 Reduced by 12.8 mW/C over 25C, when mounted on a glass epoxy board (70 mm 70 mm 1.6 mm). Ver.B July 2006 Not Recommended for New Designsz Operating power supply voltage range (Ta = 25C) Parameter Min. Max. Unit Operating power supply voltage range 5.5* 36** V Output current 500 mA * For the output voltage, consider the voltage drop (min. I/O voltage differential) due to the output current. ** Must not exceed Pd. z Electrical Characteristics (Unless otherwise specified, Ta = 40C to 125C, Vcc = 13.5 V) Limit Parameter Symbol Unit Conditions Min. Typ. Max. Overall Total supply current 1 Icc1 80 130 A Io=0mA Total supply current 2 Icc2 80 130 A Io=200mA Total supply current 3(BD3005HFP) Icc3 80 130 A VINH=0V Regulator Output voltage VOUT 4.90 5.00 5.10 V Input stability Line.Reg 10 20 mV Vcc=6.225 V Load stability Load.Reg 15 30 mV Io=5200mA Min. I/O voltage differential Vd 0.78 1.1 V Vcc=4.75 V, Io=200mA Output current IOUT 500 mA VOUT=4.9V Ripple rejection R.R. 45 55 dB f=120Hz, ein=1Vrms, Io=200mA Reset Detection voltage(BD3004HFP) Vdet 4.02 4.10 4.18 V Detection voltage(BD3005HFP) Vdet 4.40 4.50 4.60 V Hysteresis width VHS 50 100 150 mV *1 Output delay time Low High TdLH 12 21 40 mS CT=0.1F Low output voltage VRST 0.2 0.5 V IRST=2mA Min. operating voltage VOPL 1.0 V Watchdog timer High-side switching threshold voltage VthH 1.16 1.26 1.36 V Low-side switching threshold voltage VthL 0.20 0.24 0.28 V Discharge current Ictc 1 2 3 A Charge current Icto 3 6 10 A *2 Watchdog monitor time TWH 32 51 90 mS CT=0.1F *3 Watchdog reset time TWL 10 17 30 mS CT=0.1F Clock input pulse width TWCLK 500 nS INH WDT off voltage(BD3005HFP) VUINH 3.2 8.0 V WDT on voltage(BD3005HFP) VLINH 0 1.8 V *1 TdLH can be varied by changing the CT capacitance value. TdLH (s) (1.26 CT (F)) / Icto (A) (Calculation uses Typ. values) *2 TWH can be varied by changing the CT capacitance value. TWH (s) (1.02 CT (F)) / Ictc (A) (Calculation uses Typ. values) *3 TWL can be varied by changing the CT capacitance value. TWL (s) (1.02 CT (F)) / Icto (A) (Calculation uses Typ. values) Note: This IC is not designed to be radiation-resistant. 2/8 Not Recommended for New Designs