Power Management ICs for Automotive Body Control Regulator with Voltage Detector and Watchdog Timer BD3010AFV-M No.10039EAT09 ●Description BD3010AFV-M is a regulator IC with integrated WDT (Watch Dog Timer), high output voltage accuracy ±2.0% and 80µA (Typ.) low circuit current consumption. BD3010AFV-M supports usage of low ESR ceramic capacitor for output stability. Also integrated is an automatic WDT ON/OFF feature using output current detection and an output clamping circuit to prevent output overshoot caused by current flow. The reset detection voltage can be adjusted by connecting resistors on the RADJ terminal. BD3010AFV-M can be a stable power supply for any applications while detecting malfunction of microcontrollers. ●Features 1) 2) 3) 4) 5) 6) 7) 8) 9) 10) Vcc Max Voltage・・・50V High Output Voltage Accuracy・・・±2.0%(Ta=-40 ~ 125℃) Low Circuit Current ・・・80µA (Typ.) Output Circuit・・・Pch DMOS Supports Low ESR Ceramic Capacitor Integrated Over Current Protection and Thermal Shut Down Integrated WDT Reset Circuit (Adjustable Detection Voltage through RADJ pin) Integrated Automatic WDT ON/OFF Function through Output Current Detection WDT Can be Switched ON/OFF by Using INH Pin Integrated Output Voltage Clamping Circuit Package・・・SSOP-B20 ●Applications Any application using a microcontroller or a DSP such as automotive (body control), display, server, DVD, phone, etc www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Absolute Maximum Ratings (Ta=25℃) Parameter Symbol Ratings Unit Vcc -0.3 ~ +50 V VADJ set pin voltage VADJ -0.3 ~ +7 V Regulator output pin voltage VOUT -0.3 ~ +7 V INH pin voltage VINH -0.3 ~ +15 V Reset output pin voltage VRo -0.3 ~ +7 V VCLK -0.3 ~ +15 V VCT -0.3 ~ +7 V VWADJ -0.3 ~ +7 V Pd 1.25 W Operating temperature range Topr -40 ~ +125 ℃ Storage temperature range Tstg -55 ~ +150 ℃ Tjmax 150 ℃ *1 Supply voltage Watchdog input pin voltage Watchdog time set pin voltage Watchdog operation current set pin voltage *2 Power dissipation Maximum junction temperature *1 *2 Not to exceed Pd. Reduced by 10.0mW/℃ over Ta=25℃, when mounted on 70mm×70mm×1.6mm glass epoxy board: ●Operating Conditions(Ta=-40 ~ +125℃) Parameter Symbol Min. Max. Unit Supply Voltage *3 Vcc 5.6 36.0 V Supply Voltage *4 Vcc 6.0 36.0 V Io 0 200 mA Output current *3 For the output voltage, consider the voltage drop (dropout voltage) due to the output current. *4 Operating condition for automatic WDT ON/OFF. NOTE: This product is not designed for protection against radioactive rays. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 2/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Electrical characteristics(Unless otherwise specified, Ta=-40 ~ +125℃, Vcc=13.5V, INH=5V, CLK=GND, Io=0mA) Parameter Symbol Min. Typ. Max. Unit Conditions Circuit current 1 Icc1 - 80 140 µA Circuit current 2 Icc2 - 110 170 µA Output voltage OUT 4.90 5.00 5.10 V Line regulation Line.Reg - 5 30 mV Vcc=5.6 ~ 36V Load regulation Load.Reg - 20 60 mV Io=5 ~ 150mA Dropout voltage ΔVd - 0.25 0.50 V Vcc=4.75V, Io=150mA Ripple rejection R.R. 45 55 - dB f=120Hz, ein=1Vrms, Io=100mA ΔI 0.002 0.010 0.025 - Io=50mA(output) Vclp 5.2 5.5 5.8 V Io=20mA(input) Detection voltage Vdet 4.12 4.25 4.38 V RADJ=Open Hysteresis width VHS 35 70 150 mV Output delay time L→H (Power On Reset) TdLH 1.8 2.3 2.8 ms Low output voltage VRST - 0.1 0.4 V Min. operating voltage VOPL 1.5 - - V Upper switching threshold voltage VthH 1.08 1.15 1.25 V WDT ON, INH=Open Lower switching threshold voltage VthL 0.13 0.15 0.17 V WDT ON, INH=Open WDT charge current Ictc 3.5 5.0 6.5 µA WDT ON, INH=Open, CT=0V WDT discharge current Ictd 0.8 1.3 1.7 µA WDT ON, INH=Open, CT=1.3V WDT watch time TWH 6.4 8.0 9.6 ms WDT ON, INH=Open, CT=0.01µF(Ceramic Cap) WDT reset time TWL 1.6 2.0 2.4 ms ※Characteristics of ceramic cap not considered. [Entire Device] Io=50mA(Ta=25℃) [Regulator] WADJ mirror current ratio Output voltage clamp (Comparator) [Reset] OUT=Vdet±0.5V, CT=0.01µF OUT=4.0V [Watchdog Timer] WDT operating current IOA 0.3 1.7 4.0 mA WDT ON, INH open, 5kΩ resistor is placedbetween WADJ and OUT pins. ※Characteristics of external resistor not considered. [INH] WDT OFF threshold voltage VHINH OUT ×0.8 - OUT V V Pulled down inside the IC when INH=open INH=5V VLINH 0 - OUT ×0.3 IINH - 15 30 µA CLK OFF threshold voltage VLCLK 0 - OUT ×0.3 V CLK ON threshold voltage VHCLK OUT ×0.8 - OUT V CLK input pulse width TWCLK 500 - - ns WDT ON threshold voltage INH input current [CLK] www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 3/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Reference Data (Unless otherwise specified, Ta=25℃, Vcc=13.5V, INH=5V, CLK=GND, Io=0mA) 0.5 150 Ta=125℃ 120 90 60 Ta=25℃ Ta=-40℃ 30 0.4 0.3 Ta=25℃ 0.2 0.1 0 5 10 15 20 25 30 35 0 3 Ta=-40℃ 2 Ta=25℃ 1 Ta=125℃ 50 100 150 0 200 5 10 15 20 25 30 OUTPUT CURRENT: Io[mA] SUPPLY VOLTAGE: Vcc [V] Fig.1 Circuit Current 1 Fig.2 Circuit Current 2 Fig.3 Input Stability 3 Ta=125℃ Ta=-40℃ 2 1 RIPPLE REJECTION: R.R. [dB] Ta=25℃ 4 DROPOUT VOLTAGE: ΔVd [V] 5 0.5 0.4 Ta=125℃ 0.3 Ta=25℃ 0.2 0.1 Ta=-40℃ 200 300 400 500 600 Ta=125℃ 60 Ta=25℃ 40 Ta=-40℃ 20 0 0 100 35 80 0.6 0 0 700 50 100 150 200 Fig.5 I/O Voltage Difference (Vcc=4.75V) Fig.4 Load Stability 10 100 1000 10000 100000 1E+06 FREQUENCY : f [Hz] OUTPUT CURRENT: Io[mA] OUTPUT CURRENT: Io [mA] Fig.6 Ripple Rejection 6 OUTPUT VOLTAGE: OUT [V] 5.10 OUTPUT VOLTAGE: OUT [V] 4 SUPPLY VOLTAGE: Vcc [V] 6 0 5 0 0 0 OUTPUT VOLTAGE: OUT[V] 6 OUTPUT VOLTAGE: OUT [V] CIRCUIT CURRENT: Icc2 [mA] CIRCUIT CURRENT: Icc1 [uA] 180 5.05 5.00 4.95 4.90 5 4 3 150℃ 170℃ 2 1 0 -40 0 40 80 120 100 120 140 160 180 200 AMBIENT TEMPERATURE: Ta [℃] AMBIENT TEMPERATURE: Ta [℃] Fig.7 Output Voltage vs. Temperature Fig.8 Thermal Shutdown Circuit Characteristics www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 4/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Reference Data (Unless otherwise specified, Ta=25℃, Vcc=13.5V, INH=5V, CLK=GND, Io=0mA) 5 4.5 3 2 Ta=125℃ 1 Ta=25℃ Ta=-40℃ 0 0 1 2 3 4 1.0 0.0 Ta=125℃ -1.0 Ta=-40℃ -2.0 Ta=25℃ -3.0 -4.0 -5.0 5 0 0.3 OUTPUT VOLTAGE: OUT [V] 1.2 1.5 9 0.8 8 0.7 IRESET[mA] 5 4 Reset time 3 Ta=-40℃ 0.3 5.5 5.4 -40 -20 0 20 40 60 80 100 120 AMBIENT TEMPERATURE: Ta [℃] Fig.15 SAT detection vs. Temperature www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Ta=-40℃ 0 0.2 0.4 0.6 0.8 1 1.2 0 1.4 2 4 VINH[V] Fig. 14 VINH_IINH 20 1.8 DET OUTPUT CURRENT: IOA [%] 5.6 8 Fig. 13 VRESET_IRESET (OUT=1.5V,Ro=0.5V) DET OUTPUT CURRENT : IOA [mA] 5.7 Ta=125℃ 10 2 2.0 5.8 12 VRESET[V] 6.0 120 Ta=25℃ 4 0 Fig.12 WDT Time vs. Temperature (CT=0. 01µF) (Vcc=5V) 80 6 AMBIENT TEMPERATURE: Ta [℃] 5.9 40 14 Ta=25℃ 0.4 120 0 16 0 80 4 -40 18 Ta=125℃ 0.5 0 40 Vdet 4.1 20 0.1 1 0 4.2 Fig.11 Reset Detection Voltage vs. Temperature 0.2 2 -40 VHS AMBIENT TEMPERATURE: Ta [℃] 0.6 Watch time 6 4.3 Fig.10 CT Pin Charge / Discharge Current (Vcc=5V) 7 WDT : TWL,H [ms] 0.9 4.4 CT PIN VOLTAGE: VCT [V] Fig.9 Voltage detection (RADJ=Open) SAT DETECTION: [V] 0.6 IINH[uA] RESET OUTPUT: Ro [V] 4 RESET DET VOLTAGE : Vdet [V] CT PIN CURRENT: Ictc,Ictd [uA] 2.0 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0.0 15 10 5 0 -5 -10 Ta=25℃ -15 -20 -40 -20 0 20 40 60 80 100 120 AMBIENT TEMPERATURE: Ta [℃] Fig.16 WDT Current Detection vs. Temperature (WADJ-OUT = 5kΩ) 5/21 6 16 26 36 Vcc[V] Fig.17 WDT Current Detection vs. Vcc (WADJ-OUT = 5kΩ) 2010.11- Rev.A Technical Note BD3010AFV-M ●Measurement Circuit for Electrical Data A Vcc OUT Vcc OUT Vcc N.C OUT N.C OUT N.C OUT GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND CLK INH WADJ CLK WADJ CLK WADJ INH RADJ INH RADJ RADJ Ro CT Io V Ro CT CT Measurement Circuit of Fig.3 and Fig.7 and Fig.8 Measurement Circuit of Fig.1 and Fig.2 OUT A V Ro Measurement Circuit of Fig.4 V Vcc OUT Vcc OUT Vcc N.C OUT N.C OUT N.C OUT GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND CLK WADJ CLK WADJ INH RADJ INH RADJ CT Ro ~ Io Measurement Circuit of Fig.5 A V ~ Ro CT V ~ 100mA Measurement Circuit of Fig.6 OUT GND GND CLK WADJ INH RADJ CT Ro Measurement Circuit of Fig.9 and Fig.11 Vcc OUT Vcc OUT Vcc N.C OUT N.C OUT N.C OUT GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND ND GND CLK WADJ CLK WADJ CLK WADJ INH RADJ INH RADJ INH RADJ CT Ro Ro CT Oscilloscope V CT OUT GND GND Ro A 0.01μF Measurement Circuit of Fig.10 A Measurement Circuit of Fig.12 Measurement Circuit of Fig.13 OUT Vcc OUT Vcc OUT Vcc N.C OUT N.C OUT N.C OUT GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND CLK WADJ CLK WADJ CLK WADJ INH RADJ INH RADJ INH RADJ CT Ro Measurement Circuit of Fig.14 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. Ro CT Oscilloscope Measurement Circuit of Fig.15 6/21 CT Ro Oscilloscope Measurement Circuit of Fig.16 and Fig.17 2010.11- Rev.A Technical Note BD3010AFV-M ●Block Diagram OUT Vcc OCP N.C. PREREG OUT VREF TSD Forced Monitor GND GND Stand-by GND GND GND GND GND Vcc GND VCLP GND GND Edge OUT WADJ CLK VREF_R RADJ ON/OFF Circuit INH VREF_R CT Ro WDT VthH VthL Fig.18 Pin No. Pin Name 1 Function Vcc Pin No. Pin Name Power supply Pin 11 Ro Function Reset output pin 2 N.C. 12 RADJ Reset detection voltage set pin 3 GND 13 WADJ WDT operating current set pin 4 GND 14 GND 5 GND 15 GND 6 GND 16 GND 7 GND 17 GND 8 CLK Clock input from microcontroller 18 GND 9 INH 19 OUT 10 CT WDT ON/OFF function pin External capacitance for reset output delay time, WDT monitor time setting connection pin 20 OUT - GND GND Voltage output pin ●Top View (Package dimension) SSOP-B20 20 11 1 10 0.3Min. 4.4 ± 0.2 6.4 ± 0.3 6.5 ± 0.2 0.1± 0.1 1.15 ± 0.1 0.15 ± 0.1 0.1 0.65 0.22 ± 0.1 (Unit : mm) SSOP-B20 www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 7/21 2010.11- Rev.A Technical Note BD3010AFV-M ●I/O Equivalent Circuits (Resistance value is Typ. value) <Regulator> Vcc OUT Vcc Vcc OUT IC 3750 kΩ 673 kΩ 1250 kΩ 200 kΩ CLK WADJ OUT OUT External R for detection 140kΩ WADJ 330kΩ CLK 10kΩ <Reset> Ro INH OUT OUT 470kΩ Ro INH 1kΩ 10k Ω 300kΩ RADJ OUT CT OUT OUT OUT OUT OUT VREF 815 kΩ RADJ CT 1kΩ 100Ω 1kΩ 330 kΩ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 1kΩ 10pF 8/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Detection Voltage Adjustment (Resistance Value is TYP. value) OUT R4 OUT OUT R2=815kΩ 470kΩ + - 100Ω R3 R1=330kΩ ~ ~ RADJ Ro 1kΩ RADJ≒1.23V IC Internal Block Diagram When typical detection voltage is 4.25V Vdet ≒ RADJ × (R1+R2) / R1 ・Vdet : Reset detection voltage ・RADJ : Internal reference voltage (MOS input) ・R1,R2 : IC internal resistor (Voltage detection precision is tightened up to ±3% by laser-trimming the R1 and R2) RADJ will fluctuate 1.23V±6.0% Insert pull down resistor R3 (lower resistance than R1) in between RADJ-GND, and pull down resistor R4 (lower resistance than R2) in between RADJ-OUT to adjust the detection voltage. By doing so, the detection voltage can be adjusted by the calculation below. Vdet=RADJ×[{R2×R4/(R2+R4)}+{R1×R3/(R1+R3)}]/{R1×R3/(R1+R3)} When the output resistance value is as small enough to ignore the IC internal resistance, you can find the detection voltage by the calculation below. Vdet ≒ RADJ × (R3+R4) / R3 Adjust the resistance value by application as the circuit current will increase due to the added resistor. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 9/21 2010.11- Rev.A Technical Note BD3010AFV-M ●WDT Voltage Detection (Resistance Value is TYP. value) PowTr - + OUT WADJ-R (External R) 140kΩ WDT can be automatically switched ON/OFF by the output load current. To detect the output load current, add a resistor between OUT-WADJ. Current detection is adjustable by selecting 1 kΩ ~ 15kΩ resistance. WADJ LOW - + WDT ON Calculation: 1 Io(Desired load current value) x ΔI(WADJ current mirror ratio)x(external R/140kΩ※ ) ※2 ≧100mV HIGH WDT OFF IC Internal Block Diagram ※1 is IC internal resistance between WADJ-OUT (tolerance approx ±30%, temperature coefficient approx 2000ppm) ※2 is an offset of detection comparator (tolerance approx 100mV±10%) When there is no resistance between WADJ-OUT, Io=70µA can be detected by the calculation below Io(Desired load current value) x ΔI (WADJ current mirror ratio) x 140kΩ≧100mV ※If the OUT-WADJ resistance value is not same as the condition on the electrical characteristics table, i.e., 5KΩ, choose the resistance value in ratio referring to the above equation. <Timing Chart> Timing Chart from the no load condition (Stand-by Mode) 13.5V Vcc 0V OUT 5V 0V INH 0V 1.25V 1.15V CT CT pull up voltage Vth H Vth L 0.15V 0V 5V CLK 0V Ro OUT 0V IoA Io Stand-by mode 5mA 0mA www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 10/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Power ON Reset 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 / 5.0µA ≒ 2.3msec ※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> ※Watchdog Timer OFF(INH ON) 13.5V Vcc 4.0V 3V 0V 4.32V OUT 5V 4.0V 4.25V VHS 70mV 0V 5V 4.0V INH 0V 1.25V CT pull up voltage CT 0V CLK 0V OUT Voltage Power on reset Reset on Ro 0V Reset on Power on reset Io Reset on 0mA www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 11/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Watchdog Timer 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 ※WDT time’s accuracy is ±20% by trimming <Calculation example>with 0.01µF CT pin capacitor TWH(S) ≒ 1.00V×0.01µF/1.3µA ≒ 8.0msec TWL(S) ≒ 1.00V×0.01µF/5.0µA ≒ 2.0msec (Typ.) (Typ.) ※If the CT capacitance is not the same as the condition on the electrical characteristics table, choose the capacitance value in ratio referring to the above equation. <Timing Chart> Vcc 13.5V 0V OUT 5V 0V WDT OFF(INH=ON) 5V INH 0V Watch time CT 1.25V 1.15V 0.15V 0V CLK CLK<500nsec 5V 0V Out Voltage Ro 0V Io IoA 5mA Stand-by mode Reset time 0mA Watch dog on www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 12/21 2010.11- Rev.A Technical Note BD3010AFV-M ●WDT timer ON/OFF switch INH (Resistance value is Typ. value) BD3010AFV-M has a switch INH to turn the WDT ON/OFF VREF_R(TYP≒1.25V) LOW INH 10kΩ HIGH 300kΩ ~ ~ WDT ON ON/OFF Current CT WDT OFF External Capacitor 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 Vcc 0V OUT 5V 0V INH 5V 0V CT 1.25V 1.15V CT pull up voltage Vth H Vth L 0.15V 0V CLK 5V 0V Ro Out Voltage 0V Io IoA 5mA 0mA www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 13/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Forced Watch Mode By detecting an input voltage (battery voltage) called output SAT detection, WDT can be forced to be operated. Vcc 8750kΩ 2500kΩ WDT will be forced ON from reset cancellation voltage to Vcc≒5.7V (WDT can be turned OFF by INH) LOW&RESET cancel WDT forced ON + - HIGH&RESET cancel VREF Stand-by mode 64kΩ IC Internal Block Diagram <Timing Chart including Forced Watch Mode> ※No CLK signal Input Forced watch mode Forced watch mode Vcc 6V 5V 3V 5.7V Stand-by mode 4.32V OUT 4.25V VHS 70mV 0V INH 0V Power on reset 1.25V CT 1.15V 0.15V Reset time watch time 0V CLK 0V Ro 0V Reset “L” Reset “L” Io 0V Forced watch mode Vcc 6V Forced watch mode 5V Stand-by mode 3V 5.7V 0V 4.32V OUT 4.25V VHS 70mV 0V INH CT 0V 1.25V 1.15V 0.15V Power on reset Reset time Watch time 0V CLK 0V OUT Voltage Ro Io 0V Reset “L” Reset “L” 0V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 14/21 2010.11- Rev.A Technical Note BD3010AFV-M <Timing Chart including Forced Watch Mode> Forced watch mode Vcc ※With CLK signal Input 5.7V 5V 3V 6V Forced watch Stand-by mode 4.32V OUT 4.25V VHS 70mV 0V INH 0V 1.25V CT 1.15V 0.15V 0V CLK 0V Ro Io Power on reset OUT 0V 0V Forced watch mode Vcc Reset “L” Reset “L” 5.7V Forced watch mode 6V 5V 3V Stand-by mode 4.32V OUT 4.25V VHS 70mV 0V INH 0V CT 1.25V 1.15V 0.15V 0V CLK 0V Ro Io Power on reset OUT Voltage 0V Reset “L” Reset “L” 0V www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 15/21 2010.11- Rev.A Technical Note BD3010AFV-M <Entire Timing Chart> Forced watch mode Forced watch mode Forced watch mode 13.5V Vcc 5.5V 5V 3V 4.0V 0V 4.32V OUT 5V 4.25V 0V 4.0V VHS 70mV WDT OFF(INH=ON) INH 5V 0V Watch time CT 1.25V 1.15V 0.15V 0V CLK 0V Power on reset OUT Voltage Ro 0V Power on reset Reset time Minimum reset Movement voltage Stand-by mode IoA Io Reset on Reset on Reset on Watch dog ON 5mA 0mA www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 16/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Thermal Dissipation Curve 3.0 ROHM standard board Board size:70mm×70mm×1.6mm 3.0 ④2.60W Power Dissipation : Pd [W] Power Dissipation : Pd [W] θja=100(℃/W) 2.0 ①1.25W 1.0 0.0 ①θja=100.0℃/W ②θja=78.1℃/W ③θja=59.5℃/W ④θja=48.1℃/W ③2.10W 2.0 ②1.60W ①1.25W 1.0 0.0 0 25 50 75 100 125 150 ROHM standard board ROHM standard board Board size:70mm×70mm×1.6mm ④3.03W 3.0 ①1-layer board ②2-layer board(back surface copper foil area:15mm×15mm ③2-layer board(back surface copper foil area:70mm×70mm ④4-layer board(back surface copper foil area:70mm×70mm Power Dissipation : Pd [W] ROHM standard board Board size:70mm×70mm×1.6mm PKG GND short to board thermal via ①1-layer board ②2-layer board(back surface copper foil area:15mm×15mm ③2-layer board(back surface copper foil area:70mm×70mm ④4-layer board(back surface copper foil area:70mm×70mm ③2.13W ①θja=89.4℃/W ②θja=75.4℃/W ③θja=58.6℃/W ④θja=41.3℃/W 2.0 ②1.66W ①1.40W 1.0 0.0 0 25 50 75 100 125 150 0 25 50 75 100 Ambient Temperature: Ta [℃] Ambient Temperature: Ta [℃] Ambient Temperature: Ta [℃] Fig.19 Fig.20 (Reference Data) Fig.21 (Reference Data) ※Reduced by 10.0mW/℃ over Ta=25℃, when mounted on 125 150 70mm×70mm×1.6mm glass epoxy board Refer to Fig.19 ~ 21 thermal dissipation characteristics for usage above Ta=25℃. The IC’s characteristics are affected heavily by the temperature, and if is exceeds its max junction temperature (Tjmax), the chip may degrade or destruct. Thermal design is critical in terms of avoiding Instantaneous destruction and reliability in long term usage. The IC needs to be operated below its max junction temperature (Tjmax) to avoid thermal destruction. Refer to Fig. 19 ~ 21 for SSOP-B20 package thermal dissipation characteristics. Operate the IC within power dissipation (Pd) when using this IC. Power consumption Pc(W) calculation will be as below (for Fig.21④) Vcc OUT Io Icc2 Pc=(Vcc-OUT)×Io+Vcc×Icc2 Power dissipation Pd≧Pc : Input Voltage : Output Voltage : Load Current : Circuit Current If load current Io is calculated to operate within power dissipation, it will be as below, where you can find the max load current IoMax for the applied voltage Vcc of the thermal design. Io ≦ Pd-Vcc×Icc2 (Refer to Fig2 for Icc2) Vcc-OUT Example) at Ta=85℃, Vcc=12V, OUT=5V Io ≦ 1.578-12×Icc2 Fig.21④:θja=41.3℃/W→-24.2mW/℃ 12-5 25℃=3.03W→85℃=1.578W Io ≦ 200mA (Icc2=110µA) Refer to above and adjust the thermal design so it will be within power dissipation within the entire operation temperature range. Below is the power consumption Pc calculation when (OUT-GND short) Pc=Vcc×(Icc2+Ishort) (Ishort: short current) (Refer to Fig.4 for I short) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 17/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Pin Settings / Precautions 1. Vcc pin Insert a 0.33 ~ 1000µF capacitor between the Vcc and GND pins. The appropriate capacitance value varies by application. Be sure to allow a sufficient margin for input voltage levels. 2. Output pins It is necessary to place capacitors between each output pin and GND to prevent oscillation on the output. Usable capacitance values range from 0.1µF ~ 1000µF. Abrupt fluctuations in input voltage and load conditions may affect the output voltage. Output capacitance values should be determined only through sufficient testing of the actual application. Vcc=5.6V~36V Ta=-40℃~+125℃ Cin=0.33µF~100µF Cout=0.1µF~100µF Vcc 100 Cout_ESR(Ω) 出力コンデンサESR(Ω) 10 1 Stable operating region Vcc (5.6V~36V) 0.1 Cin (0.33µF ~100µF) 0.01 0.001 0 50 100 150 OUT GND GND GND GND GND GND GND GND GND GND CLK WADJ INH RADJ CT 200 OUT N.C Cout (0.1µF~100µF) Io(ROUT) ESR (0.001Ω~) Ro Io(mA) 出力負荷Io(mA) Cout_ESR vs Io(reference data) 3. ※ Pin Settings / Precautions 2 Measurement circuit CT pin Connecting a capacitance of 0.01µF ~ 1µF on the CT pin is recommended. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 18/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Notes for use 1. Absolute maximum ratings Use of the IC in excess of absolute maximum ratings (such as the input voltage or operating temperature range) may result in damage to the IC. Assumptions should not be made regarding the state of the IC (e.g., short mode or open mode) when such damage is suffered. If operational values are expected to exceed the maximum ratings for the device, consider adding protective circuitry (such as fuses) to eliminate the risk of damaging the IC. 2. Electrical characteristics described in these specifications may vary, depending on temperature, supply voltage, external circuits and other conditions. Therefore, be sure to check all relevant factors, including transient characteristics. 3. GND potential The potential of the GND pin must be the minimum potential in the system in all operating conditions. Ensure that no pins are at a voltage below the GND at any time, regardless of transient characteristics. 4. Ground wiring pattern When using both small-signal and large-current GND traces, the two ground traces should be routed separately but connected to a single ground potential within the application in order to avoid variations in the small-signal ground caused by large currents. Also ensure that the GND traces of external components do not cause variations on GND voltage. The power supply and ground lines must be as short and thick as possible to reduce line impedance. 5. Inter-pin shorts and mounting errors Use caution when orienting and positioning the IC for mounting on printed circuit boards. Improper mounting may result in damage to the IC. Shorts between output pins or between output pins and the power supply or GND pins (caused by poor soldering or foreign objects) may result in damage to the IC. 6. Operation in strong electromagnetic fields Using this product in strong electromagnetic fields may cause IC malfunction. Caution should be exercised in applications where strong electromagnetic fields may be present. 7. Testing on application boards When testing the IC on an application board, connecting a capacitor directly to a low-impedance pin may subject the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply should always be turned off completely before connecting or removing it from a jig or fixture during the evaluation process. To prevent damage from static discharge, ground the IC during assembly and use similar precautions during transport and storage. 8. Thermal consideration Use a thermal design that allows for a sufficient margin in light of the Pd in actual operating conditions. Consider Pc that does not exceed Pd in actual operating conditions. (Pd≧Pc) Tjmax : Maximum junction temperature=150℃, Ta : Peripheral temperature[℃] , θja : Thermal resistance of package-ambience[℃/W], Pd : Package Power dissipation [W], Pc : Power dissipation [W], Vcc : Input Voltage, OUT : Output Voltage, Io : Load, Icc2 : Bias Current 2 Package Power dissipation : Pd (W)=(Tjmax-Ta)/θja Power dissipation : Pc (W)=(Vcc-OUT)×Io+Vcc×Icc2 9. Output voltage clamp To prevent rises in the output voltage in response to current surges through the load, the IC incorporates an output voltage clamp circuit. This circuit helps prevent damage to the microcontroller due to output voltage overshoot. However, this circuit is only effective for circuit paths with instantaneous peak currents and therefore does not support DC operation. 10. For an infinitesimal fluctuations of output voltage. At the use of the application that infinitesimal fluctuations of output voltage caused by some factors (e.g. disturbance noise, input voltage fluctuations, load fluctuations, etc.), please take enough measures to avoid some influence (e.g. insert the filter, etc.). 11. Over current protection circuit (OCP) The IC incorporates an integrated over-current protection circuit that operates in accordance with the rated output capacity. This circuit serves to protect the IC from damage when the load becomes shorted. It is also designed to limit output current (without latching) in the event of a large and instantaneous current flow from a large capacitor or other component. These protection circuits are effective in preventing damage due to sudden and unexpected accidents. However, the IC should not be used in applications characterized by the continuous or transitive operation of the protection circuits. 12. Thermal shutdown circuit (TSD) The IC incorporates a built-in thermal shutdown circuit, which is designed to turn the IC off completely in the event of thermal overload. It is not designed to protect the IC from damage or guarantee its operation. ICs should not be used after this function has activated, or in applications where the operation of this circuit is assumed. www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 19/21 2010.11- Rev.A Technical Note BD3010AFV-M 13. Applications or inspection processes where the potential of the Vcc pin or other pins may be reversed from their normal state may cause damage to the IC's internal circuitry or elements. Use an output pin capacitance of 1000µF or lower in case Vcc is shorted with the GND pin while the external capacitor is charged. Insert a diode in series with Vcc to prevent reverse current flow, or insert bypass diodes between Vcc and each pin. Back current prevention diode Bypass diode Vcc OUT GND Output Capacitor 14. Positive voltage surges on VCC pin A power zener diode should be inserted between VCC and GND for protection against voltage surges of more than 50V on the VCC pin. Vcc GND 15. Negative voltage surges on VCC pin A schottky barrier diode should be inserted between VCC and GND for protection against voltages lower than GND on the VCC pin. Vcc GND 16. Output protection diode Loads with large inductance components may cause reverse current flow during startup or shutdown. In such cases, a protection diode should be inserted on the output to protect the IC. 17. Regarding input pins of the IC This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them isolated. PN junctions are formed at the intersection of these P layers with the N layers of other elements, creating parasitic diodes and/or transistors. For example (refer to the figure below): ○When GND > Pin A and GND > Pin B, the PN junction operates as a parasitic diode ○When GND > Pin B, the PN junction operates as a parasitic transistor Parasitic diodes occur inevitably in the structure of the IC, and the operation of these parasitic diodes can result in mutual interference among circuits, operational faults, or physical damage. Accordingly, conditions that cause these diodes to operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should be avoided. (Pin B) Transistor (NPN) Resistor B (Pin B) (Pin A) B E C C E GND N P P+ P+ P+ P P+ N N N P N N P substrate Parasitic elements GND N Parasitic elements or transistors (Pin A) Parasitic elements GND Example of Simple Monolithic IC Architecture www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 20/21 2010.11- Rev.A Technical Note BD3010AFV-M ●Ordering part number B D 3 Part No. 0 1 0 A F Part No. V - M Package FV: SSOP-B20 E 2 Packaging and forming specification E2: Embossed tape and reel SSOP-B20 <Tape and Reel information> 6.5 ± 0.2 11 0.3Min. 4.4 ± 0.2 6.4 ± 0.3 20 1 Tape Embossed carrier tape Quantity 2500pcs Direction of feed E2 The direction is the 1pin of product is at the upper left when you hold ( reel on the left hand and you pull out the tape on the right hand ) 10 0.1± 0.1 1.15 ± 0.1 0.15 ± 0.1 0.1 0.65 0.22 ± 0.1 1pin Reel (Unit : mm) www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. 21/21 Direction of feed ∗ Order quantity needs to be multiple of the minimum quantity. 2010.11- Rev.A Notice Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products specified in this document are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuelcontroller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact us. ROHM Customer Support System http://www.rohm.com/contact/ www.rohm.com © 2010 ROHM Co., Ltd. All rights reserved. R1010A