ROHM BA17806FP

78 Series Regulators
1A Output 78 series Regulators
500mA Output 78 series Regulators
BA78□□Series,BA78M□□Series
No.09019EBT01
●Description
BA78□□, BA78M□□ series are three-terminal regulators available with several fixed output voltages. It supplies the
stable fixes voltage from unstable direct input voltage. The useful output voltage lineup is 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V,
18V, 20V, 24V with 0.5A / 1A current ability. They have nearly same electric characteristics as competitor products and cover
a wide range of application.
●Features
1) Built-in over-current protection circuit and thermal shutdown circuit
2) High ripple rejection
3) Available TO220CP-3, TO252-3 package to a wide range application
4) Compatible replacement to competitor products
5) Various voltage lineup (5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, 24V)
●Applications
Fixed voltage power supply for TV, Audio components, etc
●Line up
■1A BA78□□Series
Part Number
5V
BA78□□CP
○
BA78□□FP
○
6V
○
○
7V
○
○
8V
○
○
9V
○
○
10V
○
○
12V
○
○
15V
○
○
18V
○
○
20V
○
○
24V
○
○
Package
TO220CP-3
TO252-3
■0.5A BA78M□□Series
Part Number
5V
6V
BA78M□□CP
○
○
BA78M□□FP
○
○
7V
○
○
8V
○
○
9V
○
○
10V
○
○
12V
○
○
15V
○
○
18V
○
○
20V
○
○
24V
○
○
Package
TO220CP-3
TO252-3
●Output Voltage and Marking
Part Number：BA78□□□□
a
b
Symbol
a
(1A)
Part Number：BA78M□□□□
a
b
assignment of output voltage
□□
05
06
07
08
09
10
b
Symbol
Output voltage(V) □□ Output voltage(V)
5.0V typ.
12
12V typ.
6.0V typ.
15
15V typ.
7.0V typ.
18
18V typ.
8.0V typ.
20
20V typ.
9.0V typ.
24
24V typ.
10.0V typ.
Package
CP：TO220CP-3
FP：TO252-3
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© 2009 ROHM Co., Ltd. All rights reserved.
1/12
a
b
(0.5A)
assignment of output voltage
□□ Output voltage(V) □□
05
5.0V typ.
12
06
6.0V typ.
15
07
7.0V typ.
18
08
8.0V typ.
20
09
9.0V typ.
24
10
10.0V typ.
Package
CP：TO220CP-3
FP：TO252-3
Output voltage(V)
12V typ.
15V typ.
18V typ.
20V typ.
24V typ.
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Absolute Maximum Rating (Ta=25℃)
BA78□□CP/FP, BA78M□□CP/FP
Parameter
Power supply voltage
TO220CP-3
Power Dissipation 1
TO252-3
TO220CP-3
Power Dissipation 2
TO252-3
BA78□□
Output Current
BA78□□M
Operating Temperature Range
Storage Temperature Range
Operating Junction Temperature Range
Symbol
Vin
Limits
35
2 *1
1 *1
*2
22
10 *2
1 *3
0.5 *3
-40～+85
-55～+150
-40～+150
Pd1
Pd2
Io
Topr
Tstg
Tj
Unit
V
W
W
A
℃
℃
℃
*1 Derating in done 16mW/℃(TO220CP-3), 8mW/℃(TO252-3) for temperatures above Ta=25℃
*2 Derating in done 176mW/℃(TO220CP-3), 80mW/℃(TO252-3) for temperatures above Ta=25℃, Mounted on infinity Alminium heat sink.
*3 Pd,ASO and Tjmax(150℃) should not be exceeded.
●Operating Conditions(Ta=25℃, Pd should not be exceeded)
BA78□□CP/FP
Parameter
Symbol
Min.
Max.
Unit.
BA7805
7.5
25
BA7806
8.5
21
BA7807
9.5
22
BA7808
10.5
23
BA7809
11.5
26
Input
BA7810
12.5
25
Vin
V
Voltage
BA7812
14.5
27
BA7815
17.5
30
BA7818
21
33
BA7820
23
33
BA7824
27
33
Output Current
Io
1
A
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© 2009 ROHM Co., Ltd. All rights reserved.
2/12
BA78M□□CP/FP
Parameter
BA78M05
BA78M06
BA78M07
BA78M08
BA78M09
Input
BA78M10
Voltage
BA78M12
BA78M15
BA78M18
BA78M20
BA78M24
Output Current
Symbol
Vin
Io
Min.
7.5
8.5
9.5
10.5
11.5
12.5
14.5
17.5
21
23
27
-
Max.
25
21
22
23
26
25
27
30
33
33
33
0.5
Unit.
V
A
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Electrical Characteristics
BA78M□□CP/FP
(Ta=25℃,Vin=10V(05),11V(06),13V(07),14V(08),15V(09),16V(10),19V(12),23V(15),27V(18),29V(20),33V(24), Io＝350mA unless otherwise specified)
Parameter
Output Voltage 1
Symbol
Vo1
Output Voltage 2
Vo2
Line Regulation 1
Reg.I1
Line Regulation 2
Reg.I2
Ripple Rejection
R.R.
Temperature
Coefficient of
Output Voltage
Tcvo
Peak Output Current
Dropout Voltage
Io-p
Vd
Type
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06/07/08/09/10/12
15/18
20/24
common
common
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© 2009 ROHM Co., Ltd. All rights reserved.
Min
4.8
5.75
6.7
7.7
8.6
9.6
11.5
14.4
17.3
19.2
23.0
4.75
5.7
6.65
7.6
8.55
9.5
11.4
14.25
17.1
19.0
22.8
62
60
57
56
56
56
55
54
53
53
50
-
3/12
Limit
Typ
5.0
6.0
7.0
8.0
9.0
10.0
12.0
15.0
18.0
20.0
24.0
3
3
4
4
4
5
5
6
7
8
10
1
1
1
1
2
2
3
3
3
4
5
78
74
71
69
67
66
63
60
58
58
55
-1.0
-0.5
-0.6
-0.7
875
2.0
Max
5.2
6.25
7.3
8.3
9.4
10.4
12.5
15.6
18.7
20.8
25.0
5.25
6.3
7.35
8.4
9.45
10.5
12.6
15.75
18.9
21.0
25.2
100
100
100
100
100
100
100
100
100
100
100
50
50
50
50
50
50
50
50
50
50
50
-
Unit
V
V
mV
mV
dB
mV/℃
mA
V
Condition
Io=350mA
Vin=7.5～20V, Io=5mA～350mA
Vin=8.5～21V, Io=5mA～350mA
Vin=9.5～22V, Io=5mA～350mA
Vin=10.5～23V, Io=5mA～350mA
Vin=11.5～24V, Io=5mA～350mA
Vin=12.5～25V, Io=5mA～350mA
Vin=15～27V, Io=5mA～350mA
Vin=17.5～30V, Io=5mA～350mA
Vin=21～33V, Io=5mA～350mA
Vin=23～33V, Io=5mA～350mA
Vin=27～33V, Io=5mA～350mA
Vin=7～25V, Io=200mA
Vin=8～25V, Io=200mA
Vin=9～25V, Io=200mA
Vin=10.5～25V, Io=200mA
Vin=11.5～26V, Io=200mA
Vin=12.5～28V, Io=200mA
Vin=14.5～30V, Io=200mA
Vin=17.5～30V, Io=200mA
Vin=21～33V, Io=200mA
Vin=23～33V, Io=200mA
Vin=27～33V, Io=200mA
Vin=8～12V, Io=200mA
Vin=9～25V, Io=200mA
Vin=10～25V, Io=200mA
Vin=11～25V, Io=200mA
Vin=12～25V, Io=200mA
Vin=14～26V, Io=200mA
Vin=16～30V, Io=200mA
Vin=20～30V, Io=200mA
Vin=24～33V, Io=200mA
Vin=24～33V, Io=200mA
Vin=28～33V, Io=200mA
ein=1Vrms, f=120Hz, Io=100mA
Io=5mA, Tj=0～125℃
Tj=25℃
Io=500mA
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Electrical Characteristics
BA78M□□CP/FP
(Ta=25℃,Vin=10V(05),11V(06),13V(07),14V(08),15V(09),16V(10),19V(12),23V(15),27V(18),29V(20),33V(24),Io＝350mA unless otherwise specified)
Parameter
Symbol
Load Regulation 1
Reg.L1
Load Regulation 2
Reg.L2
Output Noise
Voltage
Vn
Bias Current
Bias Current Change1
Ib
Ib1
Bias Current Change 2
Ib2
Short-Circuit
Output Current
Ios
Output Resistance
Ro
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© 2009 ROHM Co., Ltd. All rights reserved.
Type
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
common
common
05
06
07
08
09
10
12
15
18
20
24
05/06/07/08
09/10/12/15/18/20/24
05
06
07
08
09
10
12
15
18
20
24
Min
-
4/12
Limit
Typ
20
20
20
20
20
20
20
20
20
20
20
10
10
10
10
10
10
10
10
10
10
10
40
60
70
80
90
100
110
130
140
150
170
4.5
0.4
0.17
9
10
11
12
13
14
16
19
22
25
37
Max
100
120
140
160
180
200
240
300
360
400
480
50
60
70
80
90
100
120
150
180
200
240
6.0
0.5
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
-
Unit
Condition
mV
Io=5mA～500mA
mV
Io=5mA～200mA
µV
f=10Hz～100kHz
mA
mA
Io=0mA
Io=5mA～350mA
Vin:8～25V, Io=200mA
Vin:9～25V, Io=200mA
Vin:10～25V, Io=200mA
Vin:10.5～25V, Io=200mA
Vin:12～25V, Io=200mA
Vin:13～25V, Io=200mA
Vin:14.5～30V, Io=200mA
Vin:17.5～30V, Io=200mA
Vin:21～33V, Io=200mA
Vin:23～33V, Io=200mA
Vin:27～33V, Io=200mA
Vin=25V
Vin=30V
mA
A
mΩ
f=1kHz
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Electrical Characteristics
BA78□□CP/FP
(Ta=25℃,Vin=10V(05),11V(06),13V(07),14V(08),15V(09),16V(10),19V(12),23V(15),27V(18),29V(20),33V(24),Io=500mA unless otherwise specified)
Parameter
Output Voltage 1
Symbol
Vo1
Output Voltage 2
Vo2
Line Regulation 1
Reg.I1
Line Regulation 2
Reg.I2
Ripple Rejection
R.R.
Temperature
Coefficient of
Output Voltage
Tcvo
Peak Output Current
Dropout Voltage
Io-p
Vd
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© 2009 ROHM Co., Ltd. All rights reserved.
Type
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06/07/08/09/10/12
15/18
20/24
common
common
Min
4.8
5.75
6.7
7.7
8.6
9.6
11.5
14.4
17.3
19.2
23.0
4.75
5.7
6.65
7.6
8.55
9.5
11.4
14.25
17.1
19.0
22.8
62
59
57
56
56
55
55
54
53
53
50
-
5/12
Limit
Typ
5.0
6.0
7.0
8.0
9.0
10.0
12.0
15.0
18.0
20.0
24.0
3
4
5
5
6
7
8
9
10
12
15
1
2
2
3
4
4
5
5
5
7
10
78
73
69
65
64
64
63
62
61
60
58
-1.0
-0.5
-0.6
-0.7
1.7
2.0
Max
5.2
6.25
7.3
8.3
9.4
10.4
12.5
15.6
18.7
20.8
25.0
5.25
6.3
7.35
8.4
9.45
10.5
12.6
15.75
18.9
21.0
25.2
100
120
140
160
180
200
240
300
360
400
480
50
60
70
80
90
100
120
150
180
200
240
-
Unit
V
V
mV
mV
Condition
Io=500mA
Vin=7.5～20V, Io=5mA～1A
Vin=8.5～21V, Io=5mA～1A
Vin=9.5～22V, Io=5mA～1A
Vin=10.5～23V, Io=5mA～1A
Vin=11.5～26V, Io=5mA～1A
Vin=12.5～25V, Io=5mA～1A
Vin=15～27V, Io=5mA～1A
Vin=17.5～30V, Io=5mA～1A
Vin=21～33V, Io=5mA～1A
Vin=23～33V, Io=5mA～1A
Vin=27～33V, Io=5mA～1A
Vin=7～25V, Io=500mA
Vin=8～25V, Io=500mA
Vin=9～25V, Io=500mA
Vin=10.5～25V, Io=500mA
Vin=11.5～26V, Io=500mA
Vin=12.5～27V, Io=500mA
Vin=14.5～30V, Io=500mA
Vin=17.5～30V, Io=500mA
Vin=21～33V, Io=500mA
Vin=23～33V, Io=500mA
Vin=27～33V, Io=500mA
Vin=8～12V, Io=500mA
Vin=9～13V, Io=500mA
Vin=10～15V, Io=500mA
Vin=11～17V, Io=500mA
Vin=13～19V, Io=500mA
Vin=14～20V, Io=500mA
Vin=16～22V, Io=500mA
Vin=20～26V, Io=500mA
Vin=24～30V, Io=500mA
Vin=26～32V, Io=500mA
Vin=30～33V, Io=500mA
dB
ein=1Vrms, f=120Hz,
Io=100mA
mV/℃
Io=5mA, Tj=0～125℃
A
V
Tj=25℃
Io=1A
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Electrical Characteristics
BA78□□CP/FP
(Ta=25℃,Vin=10V(05),11V(06),13V(07),14V(08),15V(09),16V(10),19V(12),23V(15),27V(18),29V(20),33V(24),Io=500mA unless otherwise specified)
Parameter
Symbol
Load Regulation 1
Reg.L1
Load Regulation 2
Reg.L2
Output Noise
Voltage
Vn
Bias Current
Bias Current Change 1
Ib
Ib1
Bias Current Change 2
Ib2
Short-Circuit
Output Current
Ios
Output Resistance
Ro
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© 2009 ROHM Co., Ltd. All rights reserved.
Type
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
05
06
07
08
09
10
12
15
18
20
24
common
common
05
06
07
08
09
10
12
15
18
20
24
05/06/07/08
09/10/12/15/18/20/24
05
06
07
08
09
10
12
15
18
20
24
Min
-
-
6/12
Limit
Typ
15
16
17
19
20
21
23
27
30
32
37
5
6
6
7
8
8
10
10
12
14
15
40
60
70
80
90
100
110
125
140
150
180
4.5
0.6
0.3
9
10
10
10
10
11
12
14
17
19
27
Max
100
120
140
160
180
200
200
300
360
400
480
50
60
70
80
90
90
100
150
180
200
240
8.0
0.5
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
0.8
-
Unit
Condition
mV
Io=5mA～1A
mV
Io=250mA～750mA
µV
f=10Hz～100kHz
mA
mA
Io=0mA
Io=5mA～1A
Vin:8～25V, Io=500mA
Vin:8.5～25V, Io=500mA
Vin:9.5～25V, Io=500mA
Vin:10.5～25V, Io=500mA
Vin:11.5～26V, Io=500mA
Vin:12.5～27V, Io=500mA
Vin:14.5～30V, Io=500mA
Vin:17.5～30V, Io=500mA
Vin:21～33V, Io=500mA
Vin:23～33V, Io=500mA
Vin:27～33V, Io=500mA
Vin=25V
Vin=30V
mA
A
mΩ
f=1kHz
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●BA78M□□ Characteristics data(Ta=25℃, Vin=10V(05), 14V(08), 23V(15) unless otherwise specified)
20
Ta=25℃
Io=0mA
Io=350mA
15
Vo [V]
BA78M15
10
BA78M08
0
BA78M08
BA78M05
0
10
15
20
25
0
30
0
5
10
Vin [V]
Fig.1 Line Regulation (Io=0mA)
Ta=25℃
15
20
25
30
0
5
10
15
20
25
30
Vin [V]
Vin [V]
Fig.2 Line Regulation (Io=350mA)
Fig.3 Line Regulation(Io=500mA)
20
6
10
5
BA78M05
BA78M05
5
BA78M15
BA78M08
5
0
Io=500mA
Io=500mA
15
BA78M15
10
5
2.0
Ta=25℃
Io=0mA
Ta=25℃
BA78M05
5
15
4
BA78M15
1.5
BA78M08
BA78M05
3
BA78M15
10
2
5
Io-p [A]
BA78M08
Vo [V]
Ib [mA]
Ta=25℃
Ta=25℃
Vo [V]
15
Vo [V]
20
20
Ta=25℃
BA78M08
BA78M05
BA78M15
1.0
0.5
1
0
0
0
5
10
15
20
25
30
0.0
0.0
0.5
1.0
Vin [V]
1.5
BA78M05
BA78M08
BA78M15
Ios [A]
0.4
0.2
0.0
0.3
0.4
0.5
5
10
15
20
25
Ta=25℃
Io=100mA
0
10
10
30
6
BA78M15
5
BA78M05
Ib[mA]
0.0
BA78M15
-0.5
BA78M15
4
Ta=25℃
BA78M08
3
BA78M05
BA78M08
BA78M05
0
20
40
Ta [℃]
60
80
100
Fig.10 Ta - Vo
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© 2009 ROHM Co., Ltd. All rights reserved.
BA78M05
1
0
0
-1.5
3
2
1
-1.0
BA78M15
4
BA78M08
BA78M08
2
1M
1000000
5
Ib [mA]
1.0
1K
10K
100K
1000
10000
100000
Frequency［Hz］
Frequency [Hz]
Io=0mA
0.5
100
100
Fig.9 Ripple Rejection Ratio
6
Io=5mA
BA78M15
40
Fig.8 Short – Circuit Output Current
1.5
-20
BA78M08
Vin [V]
Fig.7 Dropout Voltage
30
0
0
Io [A]
-40
60
20
0.0
0.2
25
BA78M05
R.R. [dB]
0.6
0.5
20
80
BA78M05
BA78M08
BA78M15
1.5
0.1
15
100
Ta=25℃
0.8
0
10
Fig.6 Peak Output Current
1.0
Ta=25℃
1.0
5
Vin [V]
Fig.5 Load Regulation
2.0
⊿Vo/Vo [%]
0
Io [A]
Fig.4 V
IN - Ib
Io
Vin
Vd [V]
2.0
-40
-20
0
20
40
Ta[℃]
Fig.11 Ta - Ib
7/12
60
80
100
0
0.1
0.2
0.3
0.4
0.5
Io [A]
Fig.12 Io - Ib
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●BA78□□ Characteristics data (Ta=25℃, Vin=10V(05), 14V(08), 23V(15) unless otherwise specified)
20
Ta=25℃
Io=0mA
Io=500mA
15
Vo [V]
BA7815
10
Ta=25℃
BA7815
10
10
BA7808
BA7808
5
5
BA7805
0
BA7808
5
BA7805
0
0
5
10
15
20
25
30
BA7805
0
0
5
10
Vin [V]
15
20
25
0
30
10
Io=0mA
2.0
Ta=25℃
BA7805
20
25
30
Fig15. Line Regulation (Io=1A)
20
Ta=25℃
15
Vin [V]
Fig.14 Line Regulation (Io=500mA)
6
Ta=25℃
BA7815
15
1.5
4
3
BA7815
10
Io-p [A]
BA7805
BA7808
Vo [V]
Ib [mA]
5
Vin [V]
Fig.13 Line Regulation (Io=0mA)
5
Io=1A
15
BA7815
Vo [V]
15
Vo [V]
20
20
Ta=25℃
BA7808
2
BA7808
1.0
BA7815
BA7805
5
0.5
1
0
0
0
5
10
15
20
25
30
0.0
0.5
1.0
Vin [V]
1.5
0
Io [A]
5
2.0
R.R. [dB]
Ios [A]
0.5
0.0
0
30
BA7805
1
0.5
25
80
BA7805
BA7808
BA7815
1.5
1.0
20
100
Ta=25℃
BA7805
BA7808
BA7815
15
Fig.18 Peak Output Current
2
Ta=25℃
1.5
10
Vin [V]
Fig.17 Load Regulation
Fig.16 Vin - Ib
Vd [V]
0.0
2.0
60
BA7808
BA7815
40
20 Ta=25℃
Io=100mA
0
0.2
0.4
0.6
0.8
1
00
0
5
10
15
20
25
10
10
30
100
100
1K
10K
1000
10000
Frequency [Hz]
Vin [V]
Io [A]
Fig.19 Dropout Voltage
Fig.21 Ripple Rejection Ratio
Fig.20 Short – Circuit Output Current
6
6
1.5
Io=0mA
Io=0mA
Io=5mA
1.0
5
0.5
4
100K 1000000
1M
100000
Ta=25℃
BA7815
BA7815
5
0.0
4
BA7808
BA7808
3
BA7805
2
-0.5
BA7805
Ib [mA]
BA7815
Ib [mA]
ΔVo/Vo [%]
BA7815
BA7808
BA7805
-1.5
1
0
-20
0
20
BA7805
2
1
-1.0
-40
BA7808
3
40
60
80
100
0
-40
-20
0
20
40
60
Ta [℃]
Ta [℃]
Fig.22 Ta - Vo
Fig.23 Ta - Ib
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© 2009 ROHM Co., Ltd. All rights reserved.
8/12
80
100
0
0.2
0.4
0.6
0.8
1
Io [A]
Fig.24 Io - Ib
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Internal Circuit Structural Diagram
R4
R9
R8
R10
INPUT
R13
Q9
Q8
D2
Q16
Q12
Q15
R5
Q10
Q13
Q5
R6
D1
R20
R15
Q1
Q14
R7
R22
R16
C1
Q11
Q4
Q2
R18
R11
OUTPUT
Q7
Q18
R12
R17
Q6
R2
R1
Q17
R21
R19
Q3
R14
R3
D3
COMMON
FIN
1 2 3
TO220CP-3
PIN No.
1
2
3
Symbol
INPUT
COMMON
OUTPUT
TO252-3
Function
Input terminal
Ground terminal
Output terminal
PIN No.
1
2
3
FIN
Symbol
INPUT
N.C.
OUTPUT
COMMON
Function
Input terminal
Non connection terminal
Output terminal
Ground terminal
●Protection Circuit
Vin=10V
BA7805CP
6
5
Output voltage : Vo [V]
(1)Over-current protection circuit
When the maximum rating current or more is rushed, it controls the
current ability and protects the IC from destruction.
4
3
2
1
0
6
5
Output Voltage : Vo [V]
(2) Thermal shutdown circuit
When the chip temperature of IC exceeds the setting temperature, the IC goes
OFF, and it controls the IC not to be destroyed by the heat generation.
It can be restored by being lowered the chip temperature of IC below the
setting temperature.
4
Vin=10V
BA7805CP
3
2
1
0
25 50 75 100 125 150 175 200
Chip Junction temperature : Tj [℃]
2
Maximum output current : IO-P[A]
(3) Safety operation area control circuit
It controls the output current in inverse proportion ratio to voltage difference
(input-output).
When voltage difference becomes bigger, the IC will be destroyed in rush current.
It protects the IC by controlling the current ability according to the voltage level.
1
2
Output Current : IO[A]
Tj=25℃
BA7805CP
1.5
1
0.5
0
10
20
30
40
Input-Output voltage difference: Vin-Vo [V]
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© 2009 ROHM Co., Ltd. All rights reserved.
9/12
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Thermal design
Refer to the following thermal derating curves (Fig. 25, 26), when using in the status of Ta=25℃ or more.
The characteristic of IC is greatly related to the operating temperature.
When it is used in over maximum junction temperature, the elements inside IC might become weaker and be destroyed.
It is recommended to take into consideration thermal of IC.
Note that the temperatures are in the allowed temperature limits and operated within Pd.
It is necessary to operate it at junction temperature Tjmax or less to prevent IC from the thermal destruction.
Please operate IC within permissible loss Pd because the junction temperature Tj might become considerably a high
temperature even if ambient temperature Ta is normal temperature (25℃).
Power consumption Pc(W) may be expressed by the equation shown below:
Pc=(Vin-Vo)×Io+ Vin×Iｂ
permissible loss Pd≧Pc
Io ≦
Vin
Vo
Io
Ib
Pd  Vin  Ib
Vin  Vo
: Input Voltage
: Output Voltage
: Output Current
: Bias current
Maximum Output current IoMAX can be calculated in thermal design.
・Calculation example
Ex.1) Ta=85℃, Vin =7.5V, Vo=5.0V
Using TO220CP-3 alone
θja=62.5℃/W→16mW/℃
Pd=1.04W at 85℃
1.04  7.5  4.5m
Io ≦
7.5  5.0
Io≦400ｍA
Be sure to use this IC within a power dissipation at the range of operating temperature.
(1) 22.0
12.5
(1) Mounted on infinity Alminium heat sinkθj-c=5.7(℃/W)
(2) Using an IC aloneθj-a=62.5℃/W
POWER DISSIPATION: Pd[W]
POWER DISSIPATION: Pd[W]
25
20
15
10
5
(2) 2.0
0
(1) 10.0
(1) Mounted on infinity Alminium heat sinkθj-c=12.5 (℃/W)
(2) Using an IC aloneθj-a=125.0℃/W
10
7.5
5
2.5
(2) 1.0
0
0
25
50
75
100
125
150
0
AMBIENT TEMPERATURE : Ta[℃]
Fig.25 Thermal derating curve (TO220CP-3)
25
50
75
100
125
150
AMBIENT TEMPERATURE : Ta[℃]
Fig.26
Thermal derating curve (TO252-3)
●Terminal Setting and Cautions
・INPUT
It is recommended that a capacitor (about 0.33uF) be inserted between INPUT and COMMON.
The value of capacitor is designed suitable for the actual application.
・OUTPUT
It is recommended that a capacitor (about 0.1uF) be inserted between OUTPUT and COMMON.
A tantalum capacitor can also be used for this pin because insufficient capacitors may cause oscillation by a temperature
change.
・COMMON
Keep the no voltage drop between Ground level of set board and IC.
When there is the voltage difference, setting voltage becomes inaccuracy and unstable.
It is recommended to connect by wide, short pattern, and lower the inpedance.
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© 2009 ROHM Co., Ltd. All rights reserved.
10/12
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Notes for use
(1) Absolute Maximum Ratings
While utmost care is taken to quality control of this product, any application that may exceed some of the absolute
maximum ratings including the voltage applied and the operating temperature range may result in breakage. If broken,
short-mode or open-mode may not be identified. So if it is expected to encounter with special mode that may exceed the
absolute maximum ratings, it is requested to take necessary safety measures physically including insertion of fuses.
(2) Ground voltage
Make setting of the potential of the GND terminal so that it will be maintained at the minimum in any operating state.
Furthermore, check to be sure no terminals are at a potential lower than the GND voltage including an actual electric transient.
(3) Thermal design
When you do the kind of use which exceeds Pd, It may be happened to deteriorating IC original quality such as decrease
of electric current ability with chip temperature rise. Do not exceed the power dissipation (Pd) of the package specification
rating under actual operation, and please design enough temperature margins.
(4) Short-circuiting between terminals, and mismounting
When mounting to pc board, care must be taken to avoid mistake in its orientation and alignment. Failure to do so may
result in IC breakdown. Short-circuiting due to foreign matters entered between output terminals, or between output and
power supply or GND may also cause breakdown.
(5) Operation in Strong electromagnetic field
Be noted that using the IC in the strong electromagnetic radiation can cause operation failures.
(6) Inspection with the IC set to a pc board
If a capacitor must be connected to the pin of lower impedance during inspection with the IC set to a pc board, the
capacitor must be discharged after each process to avoid stress to the IC. For electrostatic protection, provide proper
grounding to assembling processes with special care taken in handling and storage. When connecting to jigs in the
inspection process, be sure to turn OFF the power supply before it is connected and removed.
(7) Input to IC terminals
+
This is a monolithic IC with P isolation between P-substrate and each element as illustrated below. This P-layer and the
N-layer of each element form a P-N junction, and various parasitic element are formed.
If a resistor is joined to a transistor terminal as shown in Fig 28.
○P-N junction works as a parasitic diode if the following relationship is satisfied;
GND>Terminal A (at resistor side), or GND>Terminal B (at transistor side); and
○if GND>Terminal B (at NPN transistor side),
a parasitic NPN transistor is activated by N-layer of other element adjacent to the above-mentioned parasitic diode.
The structure of the IC inevitably forms parasitic elements, the activation of which may cause interference among circuits,
and/or malfunctions contributing to breakdown. It is therefore requested to take care not to use the device in such
manner that the voltage lower than GND (at P-substrate) may be applied to the input terminal, which may result in
activation of parasitic elements.
(8) Ground wiring pattern
If small-signal GND and large-current GND are provided, It will be recommended to separate the large-current GND
pattern from the small-signal GND pattern and establish a single ground at the reference point of the set PCB so that
resistance to the wiring pattern and voltage fluctuations due to a large current will cause no fluctuations in voltages of the
small-signal GND. Pay attention not to cause fluctuations in the GND wiring pattern of external parts as well.
(9) Thermal shutdown circuit
A temperature control circuit is built in the IC to prevent the damage due to overheat.Therefore, the output is turned off
when the thermal circuit works and is turned on when the temperature goes down to the specified level.
But, built-in the IC a temperature control circuit to protect itself, and avoid the design used the thermal protection.
(10) Over current protection circuit
The over-current protection circuits are built in at output, according to their respective current outputs and prevent the IC
from being damaged when the load is short-circuited or over-current. But, these protection circuits are effective for
preventing destruction by unexpected accident. When it’s in continuous protection circuit moving period don’t use please.
And for ability, because this chip has minus characteristic, be careful for heat plan.
(11) There is a possibility to damage an internal circuit or the element when Vin and the voltage of each terminal reverse in the
application. For instance, Vin is short-circuited to GND etc. with the charge charged to an external capacitor. Please use
the capacitor of the output terminal with 1000μF or less. Moreover, the Vin series is recommended to insert the diode of
the by-pass the diode of the backflow prevention or between each terminal and Vin.
Pin B
Bypass diode
Backflow prevention diode
Resistor
Transistor (NPN)
Pin A
Pin B
C
B
B
C
E
E
Parasitic
element
VCC
Output terminal
N
P+
N
P
P+
N
P+
N
P substrate
Parasitic element
Fig.27 Bypass Diode
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© 2009 ROHM Co., Ltd. All rights reserved.
GND
N
P
P+
N
P substrate
Parasitic element
Fig.28
11/12
GND
GND
Other adjacent elements
Pin A
GND
Parasitic
element
Simplified structure of monorisic IC
2009.11 - Rev.B
Technical Note
BA78□□Series,BA78M□□Series
●Ordering part number
A
1
Part No
7
8
M
Part No
0
Output
Current
None：1A
M
：0.5A
5
Output
Voltage
05 : 5V
F
P
-
Package
CP :TO220CP-3
FP :TO252-3
～
B
E
2
Packaging and forming specification
E2: Embossed tape and reel
(TO220CP-3, TO252-3)
24 : 24V
TO220CP-3
+0.2
2.8-0.1
8.0±0.2
+0.4
15.2-0.2
12.0±0.2
4.5±0.1
Tape
Embossed carrier tape
Quantity
500pcs
Direction
of feed
1.0±0.2
5.61±0.2
<Tape and Reel information>
+0.3
10.0-0.1
φ3.2±0.1
1
2
3
E2
The direction is the 1pin of product is at the lower left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
0.42±0.1
(0.585)
2.85
0.82±0.1
1.3
2.54
2.46
1 2
3
Reel
(Unit : mm)
1pin
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
TO252-3
<Tape and Reel information>
6.5±0.2
C0.5
1.5±0.2
+0.2
5.1 -0.1
1.5
3
0.8
2
2000pcs
Direction
of feed
E2
The direction is the 1pin of product is at the lower left when you hold
( reel on the left hand and you pull out the tape on the right hand
)
2.5
9.5±0.5
5.5±0.2
FIN
1
Embossed carrier tape
Quantity
2.3±0.2
0.5±0.1
0.65
Tape
0.65
0.5±0.1
0.75
2.3±0.2
2.3±0.2
1.0±0.2
1pin
(Unit : mm)
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© 2009 ROHM Co., Ltd. All rights reserved.
Reel
12/12
Direction of feed
∗ Order quantity needs to be multiple of the minimum quantity.
2009.11 - Rev.B
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,
fuel-controller 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.
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