BA78M11FPE2_技术文档

78 Series Regulators

1A Output 78 series Regulators

500mA Output 78 series Regulators

BA78□□Series,BA78M□□Series

No.12019ECT01

●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

BA78□□CP

BA78□□FP

5V

○

6V

○

7V

○

8V

○

9V

○

10V 12V 15V 18V 20V 24V Package

○

TO220CP-3

TO252-3

■0.5A BA78M□□Series

Part Number

5V

○

6V

○

7V

○

8V

○

9V

○

10V 12V 15V 18V 20V 24V Package

BA78M□□CP

BA78M□□FP

○

TO220CP-3

TO252-3

●Output Voltage and Marking

Part Number：BA78□□□□ (1A)

Part Number：BA78M□□□□ (0.5A)

a

b

a

b

Symbol

assignment of output voltage

□□ Output voltage(V) □□ Output voltage(V)

Symbol

assignment of output voltage

□□ Output voltage(V) □□ Output voltage(V)

05

06

07

08

09

10

5.0V typ.

6.0V typ.

7.0V typ.

8.0V typ.

9.0V typ.

10.0V typ.

12

15

18

20

24

12V typ.

15V typ.

18V typ.

20V typ.

24V typ.

05

06

07

08

09

10

5.0V typ.

6.0V typ.

7.0V typ.

8.0V typ.

9.0V typ.

10.0V typ.

12

15

18

20

24

12V typ.

15V typ.

18V typ.

20V typ.

24V typ.

a

Package

CP：TO220CP-3

FP：TO252-3

CP：TO220CP-3

FP：TO252-3

b

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2012.03 - Rev.C

1/12

Technical Note

BA78□□Series,BA78M□□Series

●Absolute Maximum Rating (Ta=25℃)

BA78□□CP/FP, BA78M□□CP/FP

Parameter

Symbol

Vin

Limits

35

Unit

V

Power supply voltage

TO220CP-3

Power Dissipation 1

TO252-3

TO220CP-3

Power Dissipation 2

TO252-3

2 ^*1

Pd1

Pd2

Io

W

A

1 ^*1

22 ^*2

10 ^*2

BA78□□

BA78□□M

1 ^*3

Output Current

0.5 ^*3

Operating Temperature Range

Storage Temperature Range

Operating Junction Temperature Range

Topr

Tstg

Tj

-40～+85

-55～+150

-40～+150

℃

*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

BA78M□□CP/FP

Parameter

Symbol

Min.

7.5

8.5

9.5

10.5

11.5

12.5

14.5

17.5

21

Max.

25

21

22

23

26

25

27

30

33

1

Unit.

Parameter

Symbol

Min.

7.5

8.5

9.5

10.5

11.5

12.5

14.5

17.5

21

Max.

25

21

22

23

26

25

27

30

33

0.5

Unit.

BA7805

BA78M05

BA7806

BA7807

BA7808

BA7809

BA7810

BA7812

BA7815

BA7818

BA7820

BA7824

BA78M06

BA78M07

BA78M08

BA78M09

BA78M10

BA78M12

BA78M15

BA78M18

BA78M20

BA78M24

Input

Voltage

Input

Vin

V

Vin

V

Voltage

23

27

-

23

27

-

Output Current

Io

A

Output Current

Io

A

www.rohm.com

2012.03 - Rev.C

2/12

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)

Limit

Parameter

Symbol

Type

Unit

Condition

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

55

54

53

50

-

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

6

7

8

10

1

2

3

4

5

78

74

71

69

67

66

63

60

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

50

-

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

Output Voltage 1

Vo1

V

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

Output Voltage 2

Line Regulation 1

Line Regulation 2

Ripple Rejection

Vo2

V

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

Reg.I1

mV

dB

Reg.I2

Vin=28～33V, Io=200mA

R.R.

Tcvo

ein=1Vrms, f=120Hz, Io=100mA

-

05

Temperature

Coefficient of

Output Voltage

06/07/08/09/10/12

15/18

-

mV/℃ Io=5mA, Tj=0～125℃

20/24

common

-

Peak Output Current

Dropout Voltage

Io-p

Vd

mA

V

Tj=25℃

Io=500mA

-

www.rohm.com

2012.03 - Rev.C

3/12

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)

Limit

Parameter

Symbol

Type

Unit

Condition

Min

-

Typ

20

10

40

60

70

80

90

100

110

130

140

150

170

4.5

-

Max

100

120

140

160

180

200

240

300

360

400

480

50

60

70

80

90

100

120

150

180

200

240

-

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

Load Regulation 1

Reg.L1

mV

Io=5mA～500mA

Load Regulation 2

Reg.L2

mV

Io=5mA～200mA

-

Output Noise

Voltage

Vn

µV

f=10Hz～100kHz

-

24

Bias Current

Bias Current Change1

Ib

Ib1

common

6.0

0.5

0.8

-

mA

Io=0mA

Io=5mA～350mA

05

06

07

08

09

10

12

15

-

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

Bias Current Change 2

Ib2

Ios

Ro

mA

18

20

24

-

05/06/07/08

09/10/12/15/18/20/24

0.4

0.17

9

Short-Circuit

Output Current

A

Vin=30V

05

06

07

08

09

10

12

15

18

20

24

10

11

12

13

14

16

19

22

25

37

Output Resistance

mΩ

f=1kHz

-

www.rohm.com

2012.03 - Rev.C

4/12

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)

Limit

Parameter

Symbol

Type

Unit

Condition

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

55

54

53

50

-

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

6

7

8

9

10

12

15

1

2

3

4

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

-

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

Output Voltage 1

Vo1

V

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

Output Voltage 2

Line Regulation 1

Line Regulation 2

Ripple Rejection

Vo2

V

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

Reg.I1

mV

dB

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

Reg.I2

4

5

7

10

78

73

69

65

64

63

62

61

60

58

-1.0

-0.5

-0.6

-0.7

1.7

2.0

ein=1Vrms, f=120Hz,

Io=100mA

R.R.

Tcvo

-

05

Temperature

Coefficient of

Output Voltage

06/07/08/09/10/12

15/18

-

mV/℃ Io=5mA, Tj=0～125℃

20/24

common

Peak Output Current

Dropout Voltage

Io-p

Vd

A

V

Tj=25℃

Io=1A

-

www.rohm.com

2012.03 - Rev.C

5/12

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)

Limit

Parameter

Symbol

Type

Unit

Condition

Min

-

Typ

15

16

17

19

20

21

23

27

30

32

37

5

Max

100

120

140

160

180

200

300

360

400

480

50

60

70

80

90

100

150

180

200

240

-

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

Load Regulation 1

Reg.L1

mV

Io=5mA～1A

6

7

8

Load Regulation 2

Reg.L2

8

mV

Io=250mA～750mA

10

12

14

15

40

60

70

80

90

100

110

125

140

150

180

4.5

-

Output Noise

Voltage

Vn

µV

f=10Hz～100kHz

-

24

Bias Current

Bias Current Change 1

Ib

Ib1

common

8.0

0.5

0.8

-

mA

Io=0mA

Io=5mA～1A

05

06

07

08

09

10

12

15

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

Bias Current Change 2

Ib2

Ios

Ro

mA

18

20

24

-

05/06/07/08

09/10/12/15/18/20/24

0.6

0.3

9

Short-Circuit

Output Current

A

Vin=30V

05

06

07

08

09

10

12

15

18

20

24

10

11

12

14

17

19

27

-

Output Resistance

mΩ

f=1kHz

-

www.rohm.com

2012.03 - Rev.C

6/12

Technical Note

BA78□□Series,BA78M□□Series

●BA78M□□ Characteristics data(Ta=25℃, Vin=10V(05), 14V(08), 23V(15) unless otherwise specified)

20

15

10

5

20

15

10

5

20

15

10

5

Ta=25℃

Io=350mA

BA78M15

Ta=25℃

Io=500mA

Ta=25℃

Io=0mA

BA78M15

BA78M08

BA78M05

BA78M08

BA78M05

BA78M08

BA78M05

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0

5

10

15

20

25

30

Vin [V]

Fig.2 Line Regulation (Io=350mA)

Fig.1 Line Regulation (Io=0mA)

Fig.3 Line Regulation(Io=500mA)

2.0

20

15

10

5

6

5

4

3

2

1

0

Ta=25℃

Io=0mA

Ta=25℃

BA78M05

BA78M15

1.5

1.0

0.5

0.0

BA78M15

BA78M08

BA78M05

BA78M08

BA78M05

BA78M15

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0.0

0.5

1.0

1.5

2.0

Vin [V]

Io [A]

Fig.4 ViInN - Ibo

Fig.5 Load Regulation

Fig.6 Peak Output Current

100

80

1.0

0.8

0.6

0.4

0.2

0.0

2.0

Ta=25℃

BA78M05

BA78M08

BA78M15

1.5

1.0

0.5

0.0

BA78M05

BA78M08

BA78M15

60

BA78M15

BA78M08

40

20 Ta=25℃

Io=100mA

0

10

100

1K

1000

10K

10000

100K

1M

0

0.1

0.2

0.3

0.4

0.5

0

5

10

15

20

25

30

10

100000 1000000

Frequency［Hz］

Frequency [Hz]

Io [A]

Vin [V]

Fig.9 Ripple Rejection Ratio

Fig.8 Short – Circuit Output Current

Fig.7 Dropout Voltage

1.5

1.0

6

Ta=25℃

Io=5mA

Io=0mA

BA78M15

5

4

3

2

1

0

5

BA78M05

BA78M15

0.5

4

BA78M08

BA78M05

BA78M08

0.0

3

2

1

0

BA78M05

BA78M15

BA78M08

-0.5

-1.0

-1.5

-40

-20

0

20

40

60

80

100

0

0.1

0.2

0.3

0.4

0.5

-40

-20

0

20

Ta [

40

]

℃

60

80

100

Io [A]

Ta[℃]

Fig.12 Io - Ib

Fig.10 Ta - Vo

Fig.11 Ta - Ib

7/12

www.rohm.com

2012.03 - Rev.C

Technical Note

BA78□□Series,BA78M□□Series

●BA78□□ Characteristics data (Ta=25℃, Vin=10V(05), 14V(08), 23V(15) unless otherwise specified)

20

15

10

5

20

15

10

5

20

15

10

5

Ta=25℃

Io=500mA

Ta=25℃

Io=1A

Ta=25℃

Io=0mA

BA7815

BA7808

BA7805

BA7808

BA7805

BA7808

BA7805

0

5

10

15

20

25

30

0

5

10

15

20

25

30

0

5

10

15

Vin [V]

20

25

30

Vin [V]

Fig.14 Line Regulation (Io=500mA)

Fig15. Line Regulation (Io=1A)

Fig.13 Line Regulation (Io=0mA)

6

5

4

3

2

1

0

20

2.0

Ta=25℃

Io=0mA

Ta=25℃

BA7815

BA7805

15

10

5

1.5

1.0

0.5

0.0

BA7805

BA7808

BA7815

BA7808

BA7805

BA7815

0

5

10

15

Vin [V]

20

25

30

0.0

0.5

1.0

1.5

2.0

0

5

10

15

20

25

30

Io [A]

Vin [V]

Fig.17 Load Regulation

Fig.16 Vin - Ib

Fig.18 Peak Output Current

2.0

1.5

1.0

0.5

0.0

2

1.5

1

100

80

60

40

20

Ta=25℃

BA7805

BA7808

BA7815

BA7805

BA7808

BA7815

BA7808

BA7815

0.5

0

Ta=25℃

Io=100mA

0

10

100

1K

1000

Frequency [Hz]

10K

100K

1M

0

0.2

0.4

0.6

0.8

1

0

5

10

15

Vin [V]

20

25

30

10

100

10000 100000 1000000

Io [A]

Fig.19 Dropout Voltage

Fig.21 Ripple Rejection Ratio

Fig.20 Short – Circuit Output Current

6

1.5

1.0

Io=0mA

BA7815

Io=0mA

Io=5mA

Ta=25℃

BA7815

5

4

3

2

1

0

5

BA7815

4

0.5

BA7808

BA7805

BA7815

BA7805

3

0.0

BA7805

-0.5

-1.0

-1.5

2

BA7808

1

0

-40

-20

0

20

40

60

80

100

-40

-20

0

20

40

60

80

100

0

0.2

0.4

0.6

0.8

1

Ta [℃]

Io [A]

Fig.24 Io - Ib

Fig.22 Ta - Vo

Fig.23 Ta - Ib

8/12

www.rohm.com

2012.03 - Rev.C

Technical Note

BA78□□Series,BA78M□□Series

●Internal Circuit Structural Diagram

INPUT

R9

R13

D2

R8

Q8

R4

R10

Q9

Q16

Q12

Q17

R21

R17

R12

R11

Q15

R5

Q10

OUTPUT

Q6

R2

Q13

Q5

R20

R19

R15

C1

R6

R16

Q11

R1

D1

Q7

Q18

Q4

Q1

Q14

Q3

Q2

R14

D3

R7

R22

R3

R18

COMMON

FIN

1

2 3

TO220CP-3

Symbol

TO252-3

Symbol

PIN No.

Function

PIN No.

Function

1

2

3

INPUT

COMMON

OUTPUT

Input terminal

Ground terminal

Output terminal

1

2

3

INPUT

N.C.

OUTPUT

COMMON

Input terminal

Non connection terminal

Output terminal

FIN

Ground terminal

●Protection Circuit

Vin=10V

BA7805CP

6

5

4

(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.

3

2

1

0

1

2

Output Current : I^O[A]

(2) Thermal shutdown circuit

6

5

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

3

2

Vin=10V

BA7805CP

1

0

200

75 100 125 150 175

25

50

Chip Junction temperature : Tj [℃]

(3) Safety operation area control circuit

It controls the output current in inverse proportion ratio to voltage difference

(input-output).

2

Tj=25℃

BA7805CP

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.

1.5

1

0.5

0

10

20

30

40

Input-Output voltage difference: Vin-Vo [V]

www.rohm.com

2012.03 - Rev.C

9/12

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

Vin : Input Voltage

Vo : Output Voltage

Io : Output Current

Ib : Bias current

Pd  Vin  Ib

Io ≦

Vin  Vo

Maximum Output current Io_MAXcan 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

7.5  5.0

Io≦

Io≦400ｍA

Be sure to use this IC within a power dissipation at the range of operating temperature.

25

20

12.5

10

(1) Mounted on infinity Alminium heat sinkθj-c=12.5 (℃/W)

(2) Using an IC aloneθj-a=125.0℃/W

(1) Mounted on infinity Alminium heat sinkθj-c=5.7(℃/W)

(2) Using an IC aloneθj-a=62.5℃/W

(1) 22.0

(1) 10.0

15

10

7.5

5

0

2.5

0

(2) 2.0

(2) 1.0

0

25

50

75

100

125

150

0

25

50

75

100

125

150

AMBIENT TEMPERATURE : Ta[℃]

Fig.25 Thermal derating curve (TO220CP-3)

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.

www.rohm.com

2012.03 - Rev.C

10/12

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

Resistor

Transistor (NPN)

B

C

E

Backflow prevention diode

Pin A

B

C

Pin B

E

Parasitic

element

VCC

GND

N

P⁺

Output terminal

P⁺

P

P⁺

P

Other adjacent elements

Pin A

N

P substrate

GND

Parasitic element

Parasitic

element

Fig.27 Bypass Diode

Fig.28 Simplified structure of monorisic IC

www.rohm.com

2012.03 - Rev.C

11/12

Technical Note

BA78□□Series,BA78M□□Series

●Ordering part number

B A

7 8

M

0 5

F P

-

E 2

Part No

Output

Current

None：1A

Output

Voltage

05 : 5V

Package

CP :TO220CP-3

FP :TO252-3

Packaging and forming specification

E2: Embossed tape and reel

(TO220CP-3, TO252-3)

M

：0.5A

24 : 24V

TO220CP-3

+0.3

10.0

4.5 0.1

-

0.1

φ3.2 0.1

+0.2

2.8

Tape

Embossed carrier tape

-

0.1

Quantity

500pcs

E2

Direction

of feed

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

1

2

3

0.42 0.1

2.85

(0.585)

0.82 0.1

1.3

2.46

2.54

1

2

3

Direction of feed

Order quantity needs to be multiple of the minimum quantity.

1pin

Reel

(Unit : mm)

∗

TO252-3

Tape

Embossed carrier tape

2000pcs

6.5 0.2

C0.5

Quantity

+0.2

5.1

-

0.1

2.3 0.2

E2

0.5 0.1

Direction

of feed

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

FIN

(

)

1

2

3

0.65

0.75

0.65

0.5 0.1

1.0 0.2

2.3 0.2

Direction of feed

Order quantity needs to be multiple of the minimum quantity.

1pin

Reel

(Unit : mm)

∗

www.rohm.com

2012.03 - Rev.C

12/12

Notice

N o t e s

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, commu-

nication 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.

ROHM Customer Support System

http://www.rohm.com/contact/

www.rohm.com

R1120

A


型号：	BA78M11FPE2
厂家：	ROHM
描述：	1A Output 78 series Regulators 500mA Output 78 series Regulators 1A输出78系列稳压器500mA输出78系列稳压器稳压器
文件：	总13页 (文件大小：373K)
中文：	中文翻译
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BA78M11FPE2 [ROHM]

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