Secondary LDO Regulator Series for Local Power Supplies
1A Secondary LDO Regulators
for Local Power Supplies
BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
No.09024EAT02
Description
The BA□□BC0 are low-saturation regulators with an output current of 1.0 A and an output voltage accuracy of
2%.
A
broad output voltage range is offered, from 1.5V to 10V, and built-in overcurrent protection and thermal shutdown (TSD)
circuits prevent damage due to short-circuiting and overloading, respectively.
Features
1) Output current: 1 A (min.)
2) Output voltage accuracy:
2%
Broad output range available: 1.5 V -10 V (BA□□BC0 series)
3) Low saturation-voltage type with PNP output
4) Built-in overcurrent protection circuit
5) Built-in thermal shutdown circuit
6) Integrated shutdown switch (BA□□BC0WT, BA□□BC0WT-5, or BA□□BC0WFP Series, BA00BC0WCP-V5)
7) Operating temperature range:
−40°C
to +105°C
Applications
All electronic devices that use microcontrollers and logic circuits
Product
Lineup
Part Number
BA□□BC0WT
BA□□BC0WT-V5
BA□□BC0WFP
BA□□BC0T
BA□□BC0FP
BA00BC0WCP-V5
1.5
-
1.8
-
2.5
-
3.0
-
-
3.3
-
5.0
-
6.0
-
-
7.0
-
-
8.0
-
-
9.0
-
10.0 Variable
-
-
-
-
Package
TO220FP-5
TO220FP-5 (V5)
TO252-5
TO220FP-3
TO252-3
TO220CP-V5
Part Number: BA□□BC0□
□
a
b c
Symbol
□□
15
18
25
30
33
50
Description
Output voltage specification
Output voltage (V)
□□
1.5 V typ
60
1.8 V typ
70
2.5 V typ
80
3.0 V typ
90
3.3 V typ
J0
5.0 V typ
00
Output voltage (V)
6.0 V typ
7.0 V typ
8.0 V typ
9.0 V typ
10.0 V typ
Variable
a
b
c
Existence of switch With W: A shutdown switch is provided.
Without W: No shutdown switch is provided.
Package
T: TO20FP-5, TO220FP-5(V5), TO220FP-3
FP: TO252-5, TO252-3
CP: TO220CP-V5
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© 2009 ROHM Co., Ltd. All rights reserved.
1/8
2009.04 - Rev.A
BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
Absolute
Maximum Ratings
(Ta = 25°C)
Parameter
Symbol
Power supply voltage
V
CC
TO252-3
TO252-5
TO220FP-3
Power
P
d
dissipation TO220FP-5
TO220FP-5 (V5)
TO220CP-V5
Operating temperature range
T
opr
Ambient storage temperature
T
stg
Maximum junction temperature
T
jmax
Technical Note
Limits
18
*1
1200
*2
1300
*3
2000
*4
2000
*4
2000
*4
2000
*4
−40
to +105
−55
to +150
150
Unit
V
mW
°C
°C
°C
*1 Must not exceed Pd.
*2 Derated at 9.6mW/°C at Ta>25°C when mounted on a glass epoxy board (70 mm
70 mm
1.6 mm).
*3 Derated at 10.4mW/°C at Ta>25°C when mounted on a glass epoxy board (70 mm
70 mm
1.6 mm).
*4 Derated at 16mW/°C at Ta> 25°C
Recommended
Operating Conditions
Parameter
Input power supply voltage
Input power supply voltage
Output current
Variable output voltage setting value
*5 When output voltage is 1.5 V, 1.8 V, or 2.5 V.
*6 When output voltage is 3.0 V or higher.
Symbol
V
CC*5
Vc
C*6
I
o
V
o
Min.
3.0
V
o
+1.0
-
1.5
Max.
16.0
16.0
1
12
Unit
V
V
A
V
Electrical
Characteristics
BA□□BC0FP/T/WFP/WT (−V5)
(Unless otherwise specified, Ta = 25°C; V
CTL
= 3 V; V
CCDC*7
)
Parameter
Symbol
Min.
Typ.
Output voltage
Shutdown circuit current
Minimum I/O voltage difference
*8
Output current capacity
Input stability
*9
Load stability
Temperature coefficient of
output voltage
*10
Vo
Isd
∆Vd
Io
Reg.I
Reg.L
Tcvo
Vo (T)
0.98
-
-
1
-
-
-
Vo (T)
0
0.3
-
15
35
0.02
Max.
Vo (T)
1.02
10
0.5
-
35
75
-
Unit
V
A
V
A
mV
mV
%/°C
Conditions
Io = 200mA
VCTL = 0 V while in off mode
Io = 200 mA，Vcc = 0.95
Vo
Vcc = Vo+1.0V→16V, Io = 200mA
Io = 0 mA
→1
A
Io = 5 mA½Tj = 0°C to 125℃
Vo (T): Set output voltage
*7
Vo = 1.5 V, 1.8 V, 2.5 V : Vcc = 3.3 V, Vo = 3.0 V, 3.3 V : Vcc = 5 V,
Vo = 5.0 V : Vcc : 8 V, Vo = 6.0 V : Vcc = 9 V, Vo = 8.0 V : Vcc = 11 V,
Vo = 9.0 V : Vcc = 12 V, Vo = 10.0 V : Vcc = 13 V
*8
Vo
≥
3.3 V
*9
Change Vcc from 3.0 V to 6 V if 1.5 V
≤
Vo
≤
2.5 V.
*10 Operation guaranteed
BA00BC0WFP/WT (−V5)/CP-V5
(Unless otherwise specified, Ta = 25°C, Vcc = 3.3 V, V
CTL
= 3 V, R1 = 30 k, R2 = 30 k
*11
)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Shutdown circuit current
Isd
-
0
10
A
VCTL = 0 V while in OFF mode
Reference voltage
Vc
1.225 1.250
1.275
V
Io = 50 mA
Minimum I/O voltage difference
∆Vd
-
0.3
0.5
V
Io = 500 mA, Vcc = 2.5V
Output current capacity
Io
1
-
-
A
Input stability
Reg.I
-
15
30
mV
Vcc = Vo + 1.0 V→16V, Io = 200 mA
Load stability
Reg.L
-
35
75
mV
Io = 0 mA
→1A
Temperature coefficient of output
*12
voltage
*11 VOUT = Vc
(R1 + R2) / R1 (V)
*12 Operation guaranteed
Tcvo
-
0.02
-
%/°C
Io = 5mA, Tj=0°C to 125°C
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© 2009 ROHM Co., Ltd. All rights reserved.
2/8
2009.04 - Rev.A
BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
Technical Note
Electrical
Characteristics Curves
(Unless otherwise specified, Ta = 25°C, Vcc = 8 V, V
CTL
= 2 V, I
O
= 0 mA)
2.5
6
6
OUTPUT VOLTAGE ：V
OUT
[mA]
[BA50BC0WFP]
CIRCUIT ＣURRENT ： Icc [mA]
2
OUTPUT VOLTAGE
：
V
OUT
[V
]
5
4
3
2
1
0
0
2
4
6
8 10 12 14 16
SUPPLY VOLTAGE ： Vcc [V]
18
0
2
[BA50BC0WFP]
5
4
3
2
1
0
4
6
8 10 12 14 16
SUPPLY VOLTAGE
：
Vcc [V]
18
[BA50BC0WFP]
1.5
1
0.5
0
0
2
4
6
8 10 12 14
SUPPLY VOLTAGE ： Vcc [V]
16
18
Fig.1 Circuit Current
6
Fig.2 Input Stability(Io=0mA)
0.7
DROPOUT VOLTAGE ： ΔVd [mV]
RIPPLE REJECTION ： R.R. [dB]
0.6
0.5
0.4
0.3
0.2
0.1
0
Fig.3 Input Stability(Io = 1 A)
70
[BA50BC0WFP]
OUTPUT VOLTAGE ： V
OUT
[V]
5
4
3
2
1
0
0 0.1 0.2 0 .3 0 .4 0.5 0 .6 0 .7 0.8 0.9 1
1 .1 1.2 1 .3 1 .4 1.5 1.6 1 .7
[BA50BC0WFP]
60
50
40
30
20
10
0
[BA50BC0WFP]
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
1.1 1.2 1.3
0
200
400
600
800
1000
OUTPUT CURRENT ： I
OUT
[A]
OUTPUT CURRENT ： I
OUT
[mA]
FREQUENCY ： f [Hz]
Fig.4 Load Stability
Fig.5 I/O Voltage Difference
Fig.6 Ripple Rejection
4
OUTPUT VOLTAGE ： V
OUT
[V]
3.5
3
2.5
2
1.5
1
-4 0 - 30 - 20 -1 0 0
10 20
30 40
50
60 70
80 90 10 0
1
CIRCUIT ＣURRENT ： Icc [mA]
70
[BA50BC0WFP]
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
- 40 -30 - 20 -10 0
1 0 20
[BA50BC0WFP]
CIRCUIT ＣURRENT ： Icc [mA]
60
50
40
30
20
10
0
0
100
200
300 400
[BA50BC0WFP]
3 0 40
50
60 70
8 0 9 0 10 0
500
600 700
800
900 1000
TEMPERATURE ： Ta [℃]
TEMPERATURE： Ta [℃]
OUTPUT CURRENT ： I
OUT
[A]
Fig.7 Output Voltage vs Temperature
Fig.8 Circuit Current Temperature
Fig.9 Circuit Current Classified by Load
6
OUTPUT VOLTAGE ： V
OUT
[V]
5
CONTROL ＣURRENT ： I
CTL
[μA]
0.6
8
[BA50BC0WFP]
OUTPUT VOLTAGE ： V
OUT
[V]
0.5
0.4
0.3
0.2
0.1
0
7
6
5
4
3
2
1
0
[BA50BC0WFP]
[BA50BC0WFP]
4
3
2
1
0
0
2
4
6
8
CONTROL VOLTAGE ： V
CTL
[V]
10
0
2
4
6
8 10 12 14 16
CONTROL VOLTAGE ： V
CTL
[V]
18
100
120
140
160
180
TEMPERATURE ： Ta [℃]
200
Fig.10 CTL Voltage vs Output Voltage
Fig.11 CTL Voltage vs CTL Current
Fig.12 Thermal Shutdown Circuit
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© 2009 ROHM Co., Ltd. All rights reserved.
3/8
2009.04 - Rev.A
BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
Block
Diagrams / Standard Example Application Circuits
[BA□□BC0T] / [BA□□BC0FP]
Fin
Vref
GND (TO252-3)
Technical Note
Driver
TOP VIEW
R2
Pin No.
1
2
3
FIN
Pin name
Vcc
N.C./GND
OUT
GND
Function
Supply voltage input
NC pin/GND
*1
Voltage output
GMD
*2
R1
*1 NC pin for TO252-3 and GND pin for TO220FP-3 and TO220FP-5 (V5).
*2 TO252-3 only.
TSD
1
2
OCP
3
Vcc
0.33μF
N.C.
(TO252-3)
GND
(TO220FP-3)
OUT
1 2 3
22μF
TO252-3
1 2 3
Fig.13
TO220FP-3
PIN
Vcc (1 Pin）
OUT (3 Pin)
External capacitor setting range
Approximately 0.33
F.
22
F
to 1000
F
[BA□□BC0TWT] / [BA□□BC0WT-V5] / [BA□□BC0WFP]
Fin
GND(TO252-5)
Vcc
Vref
Driver
TOP VIEW
R2
1 2 3 4 5
TO252-5
R1
TSD
OCP
Pin No.
1
2
3
4
5
FIN
Pin name
CTL
Vcc
N.C./GND
OUT
N.C.
GND
Function
Output voltage on/off control
Supply voltage input
NC pin/GND
*1
Power supply output
NC pin
GND
*2
*1 NC pin for TO252-5 and GND pin for TO220FP-5 and TO220FP-5 (V5).
*2 TO252-5 only.
N.C.
1
CTL
2
Vcc
3
4
N.C.
(TO252-5)
GND
(TO220FP-5,
-5(V5)
OUT
5
22μF
0.33μF
PIN
Vcc (2 Pin)
OUT (4 Pin)
12 34 5
12 34 5
External capacitor setting range
Approximately 0.33
F.
22
F
to 1000
F
Fig.14
[BA00BC0WT] / [BA00BC0WFP]
Fin
GND(TO252-5)
Vcc
Vref
Driver
TO220FP-5 TO220FP-5 (V5)
TOP VIEW
123
1 2 3 4 5
TO220CP-V5 TO252-5
Pin No.
1
2
3
4
5
FIN
Pin name
CTL
Vcc
N.C./GND
OUT
Ｃ
GND
Function
Output voltage on/off control
Supply voltage input
NC pin/GND
*1
Power supply output
ADJ pin
GND
*2
TSD
OCP
*1 NC pin for TO252-5 and GND pin for TO220FP-5 and TO220FP-5 (V5).
*2 TO252-5 only.
OUT
R2
22μF R1
5
C
1
CTL
2
Vcc
3
4
N.C.
(TO252-5)
GND
(TO220FP-5,
-5(V5)
0.33μF
PIN
Vcc (2 Pin)
OUT (4 Pin)
12345
12345
External capacitor setting range
Approximately 0.33
F.
22
F
to 1000
F
Fig.15
TO220FP-5 TO220FP-5 (V5)
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© 2009 ROHM Co., Ltd. All rights reserved.
4/8
2009.04 - Rev.A
BA□□BC0 Series,BA□□BC0W Series,BA00BC0W Series
Input
/ Output Equivalent Circuit Diagrams
Vcc
Technical Note
Vcc
* For the BA00BC0WT, connect R1 and
R2 externally between the C and GND
pins and between the OUT and C pins.
OUT
CTL
27kΩ
2kΩ
R2
31kΩ
R1
Fig.16
Fig.17
Equation: VOUT = Vc
(R1 + R2) / R1
(Vc = 1.25 V (Typ.))
The recommended R1 value is
approximately 30 k to 150 k.
Thermal
Derating Curves
TO220FP-3/TO220FP-5/TO220FP-5V5）
25
POWER DISSIPATION：Pd [W]
(1)20.0
20
15
10
5
0
POWER DIDDIPATION
：
Pd [W]
(1) When using an infinite heat sink.
j-c
= 6.25 (°C/W)
(2) During IC without heat sink operation.
j-a
= 62.5 (°C/W)
TO252-3/TO252-5
2.0
1.6
1.30
1.2
TO252-5
IC mounted on a ROHM standard board
Board size: 70
70
1.6 mm
Copper foil area: 7
7 mm
TO252-5
ja=96.2
(°C/W)
TO252-3
ja
＝104.2
(°C/W)
0.8
0.4
0
TO252-3
(2)2.0
0
25
50
75
100
125
150
0
25
50
75
100
125
150
AMBIENT TEMPERATURE：Ta [
°C
]
AMBIENT TEMPERATURE
：
Ta [
°C
]
Fig.18
Fig.19
The characteristics of the IC are greatly influenced by the operating temperature. If the temperature exceeds the maximum
junction temperature T
jmax
, deterioration or damage may occur. Implement proper thermal designs to ensure that power
dissipation is within the permissible range in order to prevent instantaneous damage resulting from heat and maintain the
reliability of the IC for long-term operation.
The following method is used to calculate the power consumption Pc (W).
Pc = (Vcc – Vo)
Io + Vcc
Icca
Power dissipation Pd
≥
Pc
The load current Io is calculated:
Io
≤
Pd
−
Vcc
Icca
Vcc
−
Vo
Vcc
Vo
IO
Icca
: Input voltage
: Output current
: Load current
: Circuit current
Calculation Example:
Vcc = 6.0 V and Vo = 5.0 V at Ta = 85°C
0.676
−
6.0
Icca
6.0
−
5.0
Io
≤
550 mA (Icca
20 mA)
Refer to the above and implement proper thermal designs so that the IC will not be used under excessive power dissipation
conditions under the entire operating temperature range.
The power consumption Pc of the IC in the event of shorting (i.e. the Vo and GND pins are shorted) can be obtained from the
following equation:
Pc = Vcc
(Icca + Ishort) (Ishort: short current).
ja
= 96.2°C/W
→
−10.4
mW/°C
25°C = 1300 mW
→
85°C = 676 mW
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5/8
2009.04 - Rev.A
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