BD3021HFP-M

Power Management ICs for Automotive Body Control Regulator with Voltage Detector and Watchdog Timer BD3021HFP-M ●Description BD3021HFP-M is a regulator IC with integrated WDT (Watch Dog Timer), high output voltage accuracy ±2.0% and 80µA (Typ.) low circuit current consumption. BD3021HFP-M supports usage of low ESR ceramic capacitor for output stability. BD3021HFP-M can be a stable power supply for any applications while detecting malfunction of microcontrollers. ●Features 1) WDT Can be Switched ON/OFF by Using INH Pin 2) Low Circuit Current: 80µA(Typ.) 3) Output Circuit: Pch DMOS 4) High Output Voltage Accuracy: 5V±2% 5) Supports Low ESR Ceramic Capacitor 6) Vcc Max Voltage: 50V 7) Integrated Over Current Protection and Thermal Shut Down 8) HRP7 packaging ●Applications Any application using a microcontroller or a DSP such as automotive (body control), display, server, DVD, phone, etc… ●Absolute maximum ratings (Ta=25℃) Parameter Supply Voltage INH pin voltage Regulator output pin voltage Reset output pin voltage Watchdog input pin voltage Reset delay setting pin voltage Power dissipation Operating temperature range Storage temperature range Maximum junction temperature *2 *1 No.10039EAT10 Symbol Vcc VINH VOUT VRESET VCLK VCT Pd Topr Tstg Tjmax Ratings -0.3 ~ +50 -0.3 ~ +15 -0.3 ~ +15 -0.3 ~ +15 -0.3 ~ +15 -0.3 ~ +15 1.6 -40 ~ +125 -55 ~ +150 150 Unit V V V V V V W ℃ ℃ ℃ *1 Not to exceed Pd. *2 Reduced by 12.8W / °C over Ta = 25°C, when mounted on glass epoxy board: 70mm×70mm×1.6mm. ●Operating conditions (Ta=-40~125°C) Parameter Supply Voltage Output Current *3 Symbol Vcc Io Min 5.6 0 Max 36.0 500 Unit V mA *3 For the output voltage, consider the voltage drop (dropout voltage) due to the output current. NOTE: This product is not designed for protection against radioactive rays. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/14 2010.11 - Rev.A BD3021HFP-M ●Electrical characteristics (Unless otherwise specified, Ta=25°C, Vcc=13.5V, CLK=GND) Parameter Overall Device Bias current 1 Bias current 2 Regulator Output voltage Line regulation Load regulation Dropout voltage Ripple rejection Reset Detection voltage Hysteresis width Output delay time LowHigh (Power on reset time) Output delay time High→Low RESET discharge urrent CT discharge current Low output voltage Min. operating voltage Watchdog timer CT switching threshold voltage High CT switching threshold voltage Low WDT Charge current WDT Discharge current Watchdog monitor time Low Watchdog reset time CLK Input pulse width INH WDT OFF threshold Voltage WDT ON threshold voltage INH Input current VHINH VLINH IINH VOUT ×0.8 0 － － － 10 VOUT VOUT ×0.3 20 V V µA INH=5V VthH VthL Ictc Ictd TWH TWL TWCLK 1.08 0.13 3.5 1.2 3.0 1.0 500 1.15 0.15 6.0 2.0 5.0 1.7 － 1.25 0.17 8.5 2.8 7.0 2.4 － V V µA µA ms ms ns Vdet VHS TdLH TdHL IRESET Ict VRST VOPL 4.40 50 1.1 － 0.2 0.1 － 1.5 4.50 100 1.9 100 － － 0.1 － 4.60 150 2.7 300 － － 0.2 － V mV ms µs mA mA V V VOUT Line.Reg Load.Reg ΔVd R.R. 4.90 － － － 45 5.00 5 30 0.3 55 5.10 35 70 0.6 － V mV mV V dB Io=200mA Vcc=5.6 ~ 36V Io=5 ~ 200mA Icc1 Icc2 － － 80 150 130 300 µA µA Io=0mA Symbol Min. Typ. Max. Unit Technical Note Conditions Io=50mA(Ta=25℃) Vcc=4.75V, Io=200mA f=120Hz, ein=1Vrms, Io=100mA Vcc=Vdet±0.5V(Vcc=VOUT) INH=Open,CT=0.01µF Vcc=Vdet±0.5V(Vcc=VOUT) INH= Open,CT=0.01µF Vcc=1.5V,RESET=0.5V (Vcc=VOUT) Vcc=1.5V,CT=0.5V (Vcc=VOUT) VOUT=4.0V WDT ON, INH= Open WDT ON, INH= Open WDT ON, INH= Open, CT=0V WDT ON, INH= Open, CT=1.3V WDT ON, INH= Open, CT=0.01µF(Ceramic Cap) ※Characteristics of ceramic cap not considered. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/14 2010.11 - Rev.A BD3021HFP-M ●Electrical characteristics (Unless otherwise specified, Ta=25°C, Vcc=13.5V, CLK=GND ) 120 CIRCUIT CURRENT: Icc1 [µA] Technical Note 500 CIRCUIT CURRENT: Icc2 [μA] 6 OUTPUT VOLTAGE: VOUT [V] 5 4 3 2 1 0 0 100 200 300 400 OUTPUT CURRENT: IOUT [mA] 500 0 5 10 15 20 SUPPLY VOLTAGE : Vcc [V] 25 Ta=-40℃ Ta=25℃ Ta=125℃ 100 80 60 40 20 0 0 Ta=125℃ 400 300 Ta=25℃ Ta=-40℃ 200 100 0 5 10 15 20 SUPPLY VOLTAGE: Vcc [V] 25 Fig.1 Circuit Current Fig.2 Circuit Current Fig.3 Input Stability 6 Ta=25℃ DROPOUT VOLTAGE: ?Vd [V] 1 RIPPLE REJECTION: R.R. [dB] 80 OUTPUT VOLTAGE: Vo[V] 5 4 Ta=-40℃ 3 2 1 0 0.0 Ta=125℃ 0.8 Ta=125℃ 0.6 Ta=25℃ 0.4 Ta=-40℃ 0.2 60 40 Ta=125℃ Ta=25℃ 20 Ta=-40℃ 0 10 0 0.2 0.4 0.6 0.8 1.0 OUTPUT CURRENT: Io[A] 1.2 0 100 200 300 400 OUTPUT CURRENT: Io [mA] 500 100 1000 10000 100000 1000000 FREQUENCY : f [Hz] Fig. 4 Load Stability Fig.5 Dropout Voltage Fig. 6 Ripple Rejection 5.50 6 OUTPUT VOLTAGE: VOUT [V] 10 RESET VOLTAGE: VRESET [V] OUTPUT VOLTAGE: VOUT [V] 5 4 3 2 1 0 100 5.25 8 6 5.00 4 4.75 2 4.50 0 120 140 160 180 200 AMBIENT TEMPERATURE: Ta [℃] -40 0 40 80 AMBIENT TEMPERATURE: Ta [℃] 120 0 1 2 3 4 OUTPUT VOLTAGE: VOUT [V] 5 Fig. 7 Output Voltage Temperature Characteristics 4.8 9 CT PIN CURRENT: Ictc,cto [µA] Fig.8 Thermal Shutdown Circuit Characteristics 6 5 VHS Fig.9 Restion Voltage (Vcc=VOUT) Ta=25℃ 7 5 DETECTION VOLTAGE: Vdet[V] Ta=125℃ 4.6 WDT : TWL,H [ms] 4.4 Vdet 4 3 2 1 Watch time Ta=-40℃ 3 1 -1 -3 0 0.5 1 1.5 2 2.5 CT PIN VOLTAGE: VCT [V] 3 4.2 Reset time 4.0 3.8 -40 0 40 80 120 AMBIENT TEMPERATURE: Ta [℃] 0 -40 0 40 80 120 AMBIENT TEMPERATURE: Ta [℃] Fig.10 CT Pin Charge / Discharge Current (Vcc=5V) Fig.11 Reset Detection Voltage vs. Temperature Fig.12 WDT Time vs. Temperature (CT=0.01µF) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/14 2010.11 - Rev.A BD3021HFP-M ●Measurement Circuit for Reference Data Technical Note CLK INH Vcc GND VOUT RESET CT CLK INH Vcc GND VOUT RESET CT CLK INH Vcc GND VOUT RESET CT A A Io V Measurement Circuit of Fig.1 Measurement Circuit of Fig.2 Measurement Circuit of Fig.3 and Fig.7 and Fig.8 CLK INH Vcc GND VOUT RESET CT CLK INH Vcc GND VOUT RESET CT CLK INH Vcc GND VOUT RESET CT V A V Io V ～ ~ 100mA V ～ Measurement Circuit of Fig.4 Measurement Circuit of Fig.5 Measurement Circuit of Fig.6 CLK INH Vcc GND VOUT RESET CT CLK INH Vcc GND VOUT RESET CT CLK INH Vcc GND VOUT RESET CT A V Oscilloscope Measurement Circuit of Fig.9 and Fig11 Measurement Circuit of Fig.10 Measurement Circuit of Fig.12 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/14 2010.11 - Rev.A BD3021HFP-M ●Block diagrams Technical Note Vcc VREF TSD PREREG OCP edge CLK INH Vcc Vcc ON/OFF Circuit VREF_R GND VOUT RESET WDT VREF_R VthL VthH CT Fig.13 Pin No. 1 2 3 4 5 6 7 Fin Pin Name CLK INH Vcc GND VOUT RESET CT GND Function Clock Input from Microcontroller WDT ON/OFF Function Pin Power Supply Pin GND Voltage Output Pin Reset Output Pin External Capacitance for Reset Output Delay Time, WDT Monitor Time Setting Connection Pin GND ●TOP VIEW (Package dimension) HRP7 9.395±0.125 (MAX 9.745 include BURR) 1.017±0.2 8.82±0.1 (6.5) 1.905±0.1 (7.49) 0.8875 12 34 567 +5.5° 4.5° −4.5° +0.1 0.27 -0.05 0.73±0.1 0.08±0.05 S 1.27 0.08 S www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1.523±0.15 10.54±0.13 8.0±0.13 0.835±0.2 (Unit : mm) 5/14 2010.11 - Rev.A BD3021HFP-M ●Input / Output Equivalent Circuit Diagrams (Resistance value is typical value) CLK(1pin) VOUT Technical Note INH(2pin) VOUT Vcc(3pin) INH CLK 10kΩ 10kΩ Vcc 500kΩ IC VOUT(5pin) Vcc RESET(6pin) VOUT CT(7pin) VOUT 470kΩ VOUT 3.7MΩ 1.25MΩ RESET 1kΩ CT www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 6/14 2010.11 - Rev.A BD3021HFP-M ●BD3021HFP-M (Power on Reset / Watchdog Timer) Power ON reset (output delay time) is adjustable by CT pin capacitor. TdLH(S) ≒(1.15V×CT capacitance(µF) / Ictc(µA) (Typ.) ・TdLH :Output delay time( power ON reset) ・1.15V :Upper switching threshold voltage(Typ.) ・CT capacitance :capacitor connected to CT pin ・Ictc :WDT charge current Calculation example) with 0.01µF CT pin capacitor TdLH(S)=1.15V×0.01µF/6µA ≒1.9msec Technical Note ※If the CT capacitance is not the same as the condition on the electrical characteristics table, i.e., 0.01µF, choose the capacitance value in ratio referring to the above equation. Watch Dog Timer ( WDT watch time, reset time) is adjustable by the CT pin capacitor TWH(S) ≒(1.00V×CT capacitance (µF))/ Ictd(µA) (Typ.) TWL(S) ≒(1.00V×CT capacitance (µF))/ Ictc(µA) (Typ.) ・TWH :WDT watch time (delay time to turn the reset ON) ・TWL :WDT reset time (time the reset is ON) ・1.00V :Upper switching threshold voltage － lower switching threshold voltage ・CT capacitance :CT pin capacitor ※Shared with power ON reset ・Ictc :WDT charge current ・Ictd :WDT discharge current Calculation example) with 0.01µF CT pin capacitor TWH(S)≒1.00V×0.01µF/2µA≒5.0msec (Typ.) TWL(S)≒1.00V×0.01µF/6µA≒1.7msec (Typ.) ※If the CT capacitance is not the same as the condition on the electrical characteristics table, i.e., 0.01µF, choose the capacitance value in ratio referring to the above equation. ＜Timing Chart＞ 13.5V Vcc 3V 0V 4.0V 4.60V 5V VOUT 4.0V 0V 4.50V VHS 100mV CT 1.25V 1.15V 0.15V 0V CT pull up voltage CLK 0V Reset ON OUT voltage Power on reset RESET 0V Reset ON Power on reset Reset ON www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/14 2010.11 - Rev.A BD3021HFP-M ●WDT timer ON/OFF switch INH (Resistance value is typical value) BD3021HFP-M has a switch INH to turn the WDT ON/OFF VREF_R (TYP≒1.25V) Technical Note 10kΩ INH 500kΩ LOW WDT ON HIGH WDT OFF ON/OFF Circuit IC Internal Block Diagram By using INH ON, CT potential can be pulled up to internal voltage VREF_R (invalid with power ON reset)) ＜Timing Chart＞ 13.5V ～ ～ CT External Capacitor Vcc 0V VOUT 5V 0V WDT ON 5V INH 0V 1.25V 1.15V 0.15V CT pull up Voltgge Upper switching threshold voltage lower switching threshold voltage CT CLK 0V 5V 0V OUT voltage RESET 0V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 8/14 2010.11 - Rev.A BD3021HFP-M ＜Timing Chart＞ 13.5V Technical Note Vcc 5.5V 5V 3V 0V 4.0V VOUT 5V 0V 4.60V VHS100mV 4.50V 4.0V WDT OFF(INH=ON) INH 5V 0V Watch time CT 1.15V 0.15V 0V 1.25V CLK 0V CLK width