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.
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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 LowHigh (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.
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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)
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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
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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
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1.523±0.15 10.54±0.13
8.0±0.13
0.835±0.2
(Unit : mm)
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●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
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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
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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
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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