Power Management IC Series for Automotive Body Control
High Voltage
LDO Regulators
BD3570FP, BD3570HFP, BD3571FP, BD3571HFP, BD3572FP, BD3572HFP
BD3573FP, BD3573HFP, BD3574FP, BD3574HFP, BD3575FP, BD3575HFP
No.11036EBT02
●Description
BD357XFP/HFP SERIES regulators feature a high 50 V withstand-voltage and are suitable for use with onboard vehicle
microcontrollers. They offer the output current of 500 mA while limiting the quiescent current to 30μA (TYP).With these
devices, a ceramic capacitor can be selected at the output for stable operation, the output tolerance is within
±2%
over the
wide ambient temperature range (-40 to 125℃), and the short circuit protection is folded-type to minimize generation of
heat during malfunction. These devices are developed to offer most robust power-supply design under the harsh
automotive environment. The BD357XFP/HFP Series provide ideal solutions to lower the current consumption as well as to
simplify the use with battery direct-coupled systems.
●Features
1) Ultra-low quiescent current: 30μA (TYP.)
2) Low-saturation voltage type P-channel DMOS output transistors
3) High output voltage precision:
2%／Iomax = 500 mA
4) Low-ESR ceramic capacitors can be used as output capacitors.
5) Vcc power supply voltage = 50 V
6) Built-in overcurrent protection circuit and thermal shutdown circuit
7) TO252-3, TO252-5, HRP5 Package
●Applications
Onboard vehicle devices (body-control, car stereos, satellite navigation systems, etc.)
●Line
up matrix
BD3570FP/HFP BD3571FP/HFP BD3572FP/HFP BD3573FP/HFP BD3574FP/HFP BD3575FP/HFP
Output voltage
SW function
Package
HFP:HRP5
3.3V
－
FP:TO252-3,TO252-5
5.0 V
－
Variable
－
3.3V
〇
5.0 V
〇
Variable
〇
●Absolute
maximum ratings (T
a
=25℃)
Parameter
Supply voltage
Switch Supply voltage
Output current
Power dissipation
Operating temperature range
Storage temperature range
Maximum junction
temperature
※1
※2
※3
※4
※5
Symbol
V
CC
V
SW
I
O
Pd
T
opr
T
stg
T
jmax
Limit
50
50
500
1.2 (TO252-3)
※3
1.3 (TO252-5)
※4
1.6 (HRP5)
-40 to +125
-55 to +150
150
※5
※1
※2
Unit
V
V
mA
W
℃
℃
℃
Not to exceed Pd and ASO.
for ON/OFF SW Regulator only
TO252-3: Reduced by 9.6 mW/℃ over 25
℃,
when mounted on a glass epoxy board (70 mm
70 mm
1.6 mm).
TO252-5: Reduced by 10.4 mW/℃ over 25
℃,
when mounted on a glass epoxy board (70 mm
70 mm
1.6 mm).
HRP5: Reduced by 12.8 mW/℃ over 25
℃,
when mounted on a glass epoxy board (70 mm
70 mm
1.6 mm).
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© 2011 ROHM Co., Ltd. All rights reserved.
1/9
2011.03 - Rev.B
BD3570FP/HFP, BD3571FP/HFP, BD3572FP/HFP, BD3573FP/HFP
BD3574FP/HFP, BD3575FP/HFP
●Operating
Conditions
Parameter
Input voltage
BD3570,3572,3573,3575FP/HFP
BD3571,3574FP/HFP
Output current
Variable Output Voltage Range
Symbol
V
CC
V
CC
I
O
V
O
Min.
4.5
※6
5.5
※6
－
2.8
Max.
36.0
36.0
500
12
Technical Note
Unit
V
V
mA
V
※6
Please consider that the Output voltage would be dropped (Dropout voltage) according to the output current.
●Electrical
Characteristics（Unless otherwise specified, T
a
=-40 to125℃, V
CC
=13.2 V, SW=3V
※7,
V
O
settings is 5V
※8）
Parameter
Shut Down Current
Bias current
Output voltage
ADJ Terminal voltage
Output current
Dropout voltage
Ripple rejection
Line Regulation
Load Regulation
Swith Threshold voltage H
Swith Threshold voltage L
Swith Bias current
※7
※8
※9
※10
Symbol
※７
lshut
lb
V
O
※8
VADJ
I
O
△Vd
R.R.
Reg.I
Reg.L
※７
※７
※７
SWH
SWL
SWI
Limit
Min.
－
－
V
O
×
0.98
1.235
0.5
－
45
－
－
2.0
－
－
Typ.
－
30
V
O
1.260
－
0.25
55
10
20
－
－
22
Max.
10
50
V
O
×
1.02
1.285
－
0.48
－
30
40
－
0.5
60
Unit
μA
μA
V
V
A
V
dB
mV
mV
V
V
μA
SW=GND
I
O
=0mA
Conditions
I
O
=200mA,
V
O
:Please refer to Product line.
I
O
=200mA
V
CC
=4.75V,l
O
=200mA
※9
f=120Hz,ein=1V
rms
,I
O
=100mA
V
CCD
※10≦V
CC
≦25V
I
O
= 0 mA
0½A≦I
O
≦200½A
I
O
=0 mA
I
O
=0 mA
SW=5V,l
O
=0mA
BD3573,3574,3575FP/HFP only
BD3572,3575FP/HFP only
BD3571,3572,3574,3575FP/HFP only
BD3570,3573FP/HFP :VCCD=5.5V
BD3571,3572,3574,3575FP/HFP :VCCD=6.5V
○This
product is not designed for protection against radio active rays.
www.rohm.com
© 2011 ROHM Co., Ltd. All rights reserved.
2/9
2011.03 - Rev.B
BD3570FP/HFP, BD3571FP/HFP, BD3572FP/HFP, BD3573FP/HFP
BD3574FP/HFP, BD3575FP/HFP
●Reference
Data: BD3574HFP（Unless otherwise specified, T
a
=25℃）
50
CIRCUIT CURRENT: I
CC
[μA]
6
5
4
3
Technical Note
6
5
4
T
a
=-40
℃
3
2
1
0
0
5
10
15
20
25
OUTPUT VOLTAGE: V
O
[V]
30
20
T
a
=125℃
T
a
=25℃
T
a
=125
℃
2
OUTPUT VOLTAGE: V
O
[V]
40
T
a
=25
℃
T
a
=125
℃
T
a
=25
℃
1
0
10
T
a
=-40℃
0
0
5
10
15
20
25
SUPPLY VOLTAGE: V
CC
[V]
T
a
=-40
℃
0
500
1000
1500
2000
SUPPLY VOLTAGE: V
CC
[V]
OUTPUT CURRENT: I
O
[mA]
Fig. 1 Total Supply Current
Fig. 2 Output Voltage VS
Power Supply Voltage
70
Fig. 3
Output Voltage VS Load
3
6
RIPPLE REJECTION:R.R. [dB]
DROPOUT VOLTAGE:
ΔVd[V]
60
50
40
30
20
10
0
T
a
=125
℃
T
a
=25
℃
OUTPUT VOLTAGE: V
O
[V]
5
4
2
T
a
=25℃
T
a
=125℃
T
a
=125
℃
T
a
=25
℃
1
T
a
=-40
℃
3
2
1
0
T
a
=-40
℃
T
a
=-40℃
0
0
100
200
300
400
500
OUTPUT CURRENT: I
O
[mA]
10
100
1000
10000
100000 1000000
0
0.5
1
1.5
2
FREQUENCY: f [Hz]
SUPPLY VOLTAGE: V
SW
[V]
Fig. 4 Dropout Voltage
100
CIRCUIT CURRENT: I
CC
[μA]
Fig. 5 Ripple rejection
6
5
4
3
2
1
0
100
5.5
Fig. 6 Output Voltage VS
SW Input Voltage
80
OUTPUT VOLTAGE: V
O
[V]
OUTPUT VOLTAGE: V
O
[V]
5.25
60
5
40
4.75
20
0
0
100
200
300
400
500
OUTPUT CURRENT: I
O
[mA]
120
140
160
180
200
4.5
-40
0
40
80
120
AMBIENT TEMPERATURE: T
a
[
℃
]
AMBIENT TEMPERATURE: T
a
[
℃
]
Fig. 7 Total Supply Current
Classified by Load
120
DROPOUT VOLTAGE:
ΔVd
[V]
Fig. 8 Thermal Shutdown Circuit
Fig. 9 Output Voltage VS
Temperature
50
CIRCUIT CURRENT: I
cc
[
μ
A]
2
SW BIAS CURRENT: I
SW
[μA]
40
90
T
a
=125
℃
60
1.5
30
1
20
T
a
=25
℃
30
T
a
=-40
℃
0
0
5
10
15
20
25
SUPPLY VOLTAGE: V
SW
[V]
0.5
10
0
-40
0
40
80
120
0
-40
0
40
80
120
AMBIENT TEMPERATURE: T
a
[
℃
]
AMBIENT TEMPERATURE: T
a
[
℃
]
Fig. 10 SW Bias current
Fig. 11 Dropout voltage VS
Temperature
Fig. 12 Total Supply Current
Temperature
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© 2011 ROHM Co., Ltd. All rights reserved.
3/9
2011.03 - Rev.B
BD3570FP/HFP, BD3571FP/HFP, BD3572FP/HFP, BD3573FP/HFP
BD3574FP/HFP, BD3575FP/HFP
●Block
Diagram
Vcc
1
Cin
Vref
Vo
3
OCP
Co
OCP
＊1）
Cin
SW
2
5
Co
OCP
Vref
Vo
SW
2
Vcc
1
Cin
Vref
Vcc
1
Technical Note
Vo
5
Co
＊1）
＊2）
GND
TSD
Fin
2
GND
TSD
Fin
3
N.C.
4
＊2）
GND
Fin
3
TSD
4
Fig.13 TO252-3
N.C.
ADJ (N.C.
＊
1)
)
Fig.14 TO252-5
Cin 0.33μF½1000μF
：
Co：0.1μF½1000μF
Fig.15 HRP5
ADJ (N.C.
＊
1)
)
＊1）For
Fixed Voltage Regulator only
＊2）For
adjustable Voltage Regulator only
Vcc
●I/O
Circuit diagram (All resistance values are typical.)
Vo
Vcc
SW
210K
1K
Vo
200K
1992K: BD3570, BD3573
3706K: BD3571, BD3574
150
1250K
Fig.16 2PIN[SW]
●Pin
Assignments
FIN
TO252-3
Fig.17 5PIN[V
O
]
BD3570,3571,3573,3574
Fig.18 4.5PIN[ADJ,V
O
]
BD3572,BD3575
Pin No.
1
2
3
1 2 3
Fig. 19
FIN
Pin No.
1
Fin
Pin name
V
CC
N.C.
V
O
GND
N.C. pin
Function
Power supply pin
Voltage output pin
GND pin
Pin name
V
CC
SW
N.C.
N.C.
N.C.
ADJ
V
O
GND
Function
Power supply pin
V
O
ON/OFF function pin
N.C. pin(BD3572FP only)
N.C. pin
N.C. pin
Output voltage setting pin(BD3572,3575FP only)
Voltage output pin
GND pin
TO252-5
2
3
1 2345
Fig.20
4
5
Fin
FIN
HRP5
Pin No.
1
2
3
Pin name
V
CC
SW
N.C.
GND
N.C.
ADJ
V
O
GND
Function
Power supply pin
V
O
ON/OFF function pin (BD3573,3574,3575HFP only)
N.C. pin
GND pin
N.C. pin
Output voltage setting pin(BD3572,3575HFP only)
Voltage output pin
GND pin
1 23 45
Fig. 21
4
5
Fin
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© 2011 ROHM Co., Ltd. All rights reserved.
4/9
2011.03 - Rev.B
BD3570FP/HFP, BD3571FP/HFP, BD3572FP/HFP, BD3573FP/HFP
BD3574FP/HFP, BD3575FP/HFP
●Output
Voltage Adjustment
Vo
Technical Note
R2
To set the output voltage insert pull-down resistor R1 between the ADJ and GND pins,
and pull-up resistor R2 between the V
O
and ADJ pins.
Vo = VADJ×(R1+R2) / R1 [V]
½VADJ=1.26V(TYP.)½
The recommended connection resistor for the ADJ-GND is 30k½150kΩ.
ADJ
R1
Fig.22
●Setting
of Heat
TO252-3
2.0
IC mounted on a ROHM standard board
Substrate size: 70 mm
70 mm
1.6 mm
ja
= 104.2 (°C/W)
TO252-5
2.0
IC mounted on a ROHM standard board
Substrate size: 70 mm
70 mm
1.6 mm
ja
= 96.2 (°C/W)
HRP5
2.0
1.6 W
IC mounted on a ROHM standard board
Substrate size: 70 mm
70 mm
1.6 mm
ja
= 78.1 (°C/W)
POWER DISSIPATION: Pd [W]
POWER DISSIPATION: Pd [W]
1.2 W
1.2
1.3W
1.2
POWER DISSIPATION: Pd [W]
1.6
1.6
1.6
1.2
0.8
0.8
0.8
0.4
0.4
0.4
0
0
25
50
75
100
125
150
0
0
25
50
75
100
125
150
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE: T
a
[°C]
AMBIENT TEMPERATURE: T
a
[
℃
]
AMBIENT TEMPERATURE: T
a
[°C]
Fig. 23
Fig. 24
Fig. 25
Refer to the heat mitigation characteristics illustrated in Figs. 23, 24 and 25 when using the IC in an environment where T
a
≧25℃.
The characteristics of the IC are greatly influenced by the operating temperature. If the temperature is in excess of
the maximum junction temperature T
jmax
, the elements of the IC may be deteriorated or damaged. It is necessary to give
sufficient consideration to the heat of the IC in view of two points, i.e., the protection of the IC from instantaneous damage
and the maintenance of the reliability of the IC in long-time operation.
In order to protect the IC from thermal destruction, it is necessary to operate the IC not in excess of the maximum junction
temperature T
jmax
. Fig. 23 illustrates the power dissipation/heat mitigation characteristics for the TO252 package. Operate
the IC within the power dissipation Pd. The following method is used to calculate the power consumption P
C
(W).
Vcc : Input voltage
Vo : Output voltage
Io : Load current
Icc : Total supply current
P
C
=(V
CC
-V
O
)×I
O
+V
CC
×I
CC
Power dissipation Pd≦P
C
The load current I
O
is obtained to operate the IC within the power dissipation.
Pd-V
CC
×I
CC
Io≦
(For more information about I
CC
, see page 12.)
V
CC
-V
O
The maximum load current I
omax
for the applied voltage V
CC
can be calculated during the thermal design process.
●Calculation
example
Example: BD3571FP V
CC
= 12 V and V
O
= 5 V at T
a
= 85℃
I
O
≦
0.624-12×I
CC
12-5
(I
CC
=30μA)
θ
ja
=104.2℃/W→-9.6mAW/℃
25℃=1.2W→85℃=0.624W
I
O
≦
89mA
Make a thermal calculation in consideration of the above so that the whole operating temperature range will be within the
power dissipation.
The power consumption Pc of the IC in the event of shorting (i.e., if the V
O
and GND pins are shorted) will be obtained from
the following equation.
Pc=V
CC
×(I
CC
+Ishort)
Ishort = Short current
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© 2011 ROHM Co., Ltd. All rights reserved.
5/9
2011.03 - Rev.B
Microchip MCU
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