BD3005HFP

TECHNICAL NOTE Power Management LSI Series for Automotive Body Control Regulators with Voltage Detector and Watchdog Timer BD3004HFP,BD3005HFP 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 µA (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.（BD3004HFP）The watchdog timer can be switched on and off using the INH pin input logic.（BD3005HFP） 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 µA (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 Applications Onboard devices (Vehicle equipment, Car stereos, Satellite navigation systems, etc.) Absolute maximum ratings (Ta = 25°C) Parameter Vcc applied voltage Vs pin voltage(BD3004HFP) INH pin voltage(BD3005HFP) Regulator output pin voltage Reset output pin voltage Watchdog input pin voltage Reset delay setting pin voltage Output current Power dissipation Operating temperature range Storage temperature range Maximum junction temperature *1 Must not exceed Pd. *2 Reduced by 12.8 mW/°C over 25°C, when mounted on a glass epoxy board (70 mm × 70 mm × 1.6 mm). Symbol Vcc Vs VINH VOUT VRO VCLK VCT IOUT Pd Topr Tstg Tjmax Limit −15 to +50*1 −0.3 to +15 −0.3 to +15 −0.3 to +15 −0.3 to +15 −0.3 to +15 −0.3 to +15 500 1.6*2 −40 to +125 −55 to +150 150 Unit V V V V V V V mA W °C °C °C Ver.B July 2006 Operating power supply voltage range (Ta = 25°C) Parameter Operating power supply voltage range Output current * ** Must not exceed Pd. Min. 5.5* － Max. 36** 500 Unit V mA For the output voltage, consider the voltage drop (min. I/O voltage differential) due to the output current. Electrical Characteristics (Unless otherwise specified, Ta = −40°C to 125°C, Vcc = 13.5 V) Parameter [Overall] Total supply current 1 Total supply current 2 Total supply current 3(BD3005HFP) [Regulator] Output voltage Input stability Load stability Min. I/O voltage differential Output current Ripple rejection [Reset] Detection voltage(BD3004HFP) Detection voltage(BD3005HFP) Hysteresis width Output delay time Low → High Low output voltage Min. operating voltage [Watchdog timer] High-side switching threshold voltage Low-side switching threshold voltage Discharge current Charge current Watchdog monitor time Watchdog reset time Clock input pulse width [INH] WDT off voltage(BD3005HFP) WDT on voltage(BD3005HFP) VUINH VLINH 3.2 0 — — 8.0 1.8 V V VthH VthL Ictc Icto TWH TWL TWCLK 1.16 0.20 1 3 32 10 500 1.26 0.24 2 6 51 17 — 1.36 0.28 3 10 90 30 — V V µA µA mS mS nS CT=0.1µF*2 CT=0.1µF*3 Vdet Vdet VHS TdLH VRST VOPL 4.02 4.40 50 12 — 1.0 4.10 4.50 100 21 0.2 — 4.18 4.60 150 40 0.5 — V V mV mS V V CT=0.1µF*1 IRST=2mA VOUT Line.Reg Load.Reg ∆Vd IOUT R.R. 4.90 — — — 500 45 5.00 10 15 0.78 — 55 5.10 20 30 1.1 — — V mV mV V mA dB Vcc=6.2～25 V Io=5～200mA Vcc=4.75 V, Io=200mA VOUT=4.9V f=120Hz, ein=1Vrms, Io=200mA Icc1 Icc2 Icc3 — — — 80 80 80 130 130 130 µA µA µA Io=0mA Io=200mA VINH=0V Symbol Limit Min. Typ. Max. Unit Conditions *1 TdLH can be varied by changing the CT capacitance value. TdLH (s) ≈ (1.26 × CT (µF)) / Icto (µA) (Calculation uses Typ. values) *2 TWH can be varied by changing the CT capacitance value. TWH (s) ≈ (1.02 × CT (µF)) / Ictc (µA) (Calculation uses Typ. values) *3 TWL can be varied by changing the CT capacitance value. TWL (s) ≈ (1.02 × CT (µF)) / Icto (µA) (Calculation uses Typ. values) Note: This IC is not designed to be radiation-resistant. 2/8 Reference data (Unless otherwise specified, Ta = 25°C) 120 6 6 OUTPUT VOLTAGE: VOUT [V] 100 80 60 40 20 0 0 5 10 Ta=125℃ 5 4 OUTPUT VOLTAGE: VOUT [V] Ta=-40℃ CIRCUIT CURRENT: Icc [µA] 5 4 3 2 1 0 0 500 1000 1500 2000 Ta=25℃ Ta=125℃ Ta=25℃ Ta=-40℃ 3 2 1 0 Ta=-40℃ Ta=25℃ Ta=125℃ 15 20 25 0 5 10 15 20 25 SUPPLY VOLTAGE: Vcc [V] SUPPLY VOLTAGE: Vcc [V] OUTPUT CURRENT: IOUT [mA] Fig. 1 Circuit Current 3 Fig. 2 Output Voltage vs Supply Voltage 80 Fig. 3 Output Voltage vs Load 10 RIPPLE REJECTON: R.R. [dB] 2.5 Ta=125℃ 2 RESET VOLTAGE: VRESET[V] DROPOUT VOLTAGE: ∆Vd [V] 60 8 Ta=25℃ 1.5 1 0.5 0 0 100 200 300 400 500 6 40 BD3005HFP 4 Ta=-40℃ 20 2 BD3004HFP 0 10 100 1000 10000 100000 1E+06 0 0 1 2 3 4 5 OUTPUT CURRENT: IOUT [mA] FREQUENCY: f [Hz] Fig. 4 I/O Voltage Difference Fig. 5 Ripple Rejection Fig. 6 Reset Detection Voltage OUTPUT VOLTAGE: VOUT [V] 4.8 0.5 0 DETECTION VOLTAGE: [V] CIRCUIT CURRENT: Icc [mA] 4.6 Falling Edge Detection Voltage 0.4 CIRCIT CURRENT: Icc [µA] BD3005HFP Rising Edge Detection Voltage -10 4.4 BD3004HFP 4.2 0.3 -20 Rising Edge Detection Voltage 0.2 -30 4.0 Falling Edge Detection Voltage 0.1 -40 3.8 -40 0 40 80 120 0 0 100 200 300 400 500 -50 -15 -12 -9 -6 -3 0 AMBIENT TEMPERATURE:Ta[℃] OUTPUT CURRENT: IOUT [mA] SUPPLY VOLTAGE: Vcc [V] Fig. 7 Reset Detection Voltage Temperature 5.5 Fig. 8 Total Supply Current Classified by Load 6 Fig. 9 Back Current OUTPUT VOLTAGE: VOUT [V] OUTPUT VOLTAGE: VOUT [V] 0 40 80 120 2 CT PIN CURRENT: ICT [µA] 5 4 3 2 1 0 100 0 -2 -4 -6 -8 - 10 0 0.5 1 1.5 2 2.5 3 5.25 5 4.75 4.5 -40 120 140 160 180 200 CT PIN VOLTAGE: VCT [V] AMBIENT TEMPERATURE: Ta [ ℃] AMBIENT TEMPERATURE: Ta [ ℃] Fig. 10 CT Pin Charge vs Discharge Current Fig. 11 Output Voltage vs Temperature Fig. 12 Thermal Shutdown Circuit 3/8 Block diagram Vcc HRP7 3 Reverse Polarity Protection Pre Reg Vref OUT TSD Cin FIN 5 Co OUT Vs （BD3004HFP） OCP OUT 2 INH （BD3005HFP） 2 OUT 6 RESET Signal from microcontroller CLK W DT 1234567 Cin: 0.33 µF to 1000 µF 1 GND 7 4 FIN CT CT Co: 0.1 µF to 1000 µF CT: 0.001 µF to 22 µF Fig.13 Pin descriptions Pin. No 1 2 3 4 5 6 7 FIN I/O Circuit diagram CLK (1 pin) Vcc PREREG Vcc Pin name CLK Vs(BD3004HFP) INH(BD3005HFP) Vcc GND OUT RESET CT GND Clock input from microcontroller Function Reset detection voltage adjustment function pin WDT on/off function pin (WDT off when INH = high; WDT on when INH = low) Power supply pin GND pin Voltage output pin Reset output pin Reset output delay time, WDT monitor time setting external capacitance connection pin GND pin Vs(2 pin) PREREG Vcc INH (2 pin) PREREG 3.56MΩ CLK 100KΩ Vs 100KΩ 1.56MΩ INH 100KΩ OUT (5 pin) Vcc RESET (6 pin) OUT OUT OUT CT (7 pin) OUT 470KΩ OUT Rb Ra RESET CT Fig.14 * All resistance values are typical ones. 4/8 ● Detection voltage adjustment OUT For a basic detection voltage of 4.1 V, R4 Vs Detection voltage 1,25V(Typ.) R2=3.56MΩ Vdet = Vs × (R1 + R2 / R1) To change the detection voltage, insert pull-down resistor R3 (with a resistance value lower than R1) between the Vs and GND pins, and pull-up resistor R4 (with a resistance value lower than R2) between the Vs and Vo pins. Vdet = Vs × (R3 + R4 / R3) [R3