BA178M{{T / FP Series
Regulator ICs
Standard 78M series, 3-pin regulator
BA178M{{
{{T
{{ / FP Series
The BA178M{{T and BA178M{{FP Series are 3-pin, fixed positive output voltage regulators. These regulators are
used to provide a stabilized output voltage from a fluctuating DC input voltage.
There are 11 fixed output voltages, as follows : 5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, and 24V.
The maximum current capacity is 0.5A for each of the above voltages.
zApplications
Constant voltage power supply
zFeatures
1) Built-in overcurrent protection circuit and thermal shutdown circuit.
2) Excellent ripple regulation.
3) Available in TO-220FP and TO252-3 packages, to meet wide range of applications.
4) Compatible with other manufacturers' regulators.
5) Richly diverse lineup. (5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, 24 V)
zProduct codes
Output voltage (V)
Product No.
Output voltage (V)
Product No.
5
BA178M05T / FP
12
BA178M12T / FP
6
BA178M06T / FP
15
BA178M15T / FP
7
BA178M07T / FP
18
BA178M18T / FP
8
BA178M08T / FP
20
BA178M20T / FP
9
BA178M09T / FP
24
BA178M24T / FP
10
BA178M10T / FP
−
−
BA178M{{T / FP Series
Regulator ICs
zInternal circuit configuration diagram
(1)
INPUT
R4
R10
R8
R9
R13
Q8
Q9
Q12
D2
Q16
Q15
R5
Q13
R21
R12
R17
Q10
Q17
R11
(3)
OUTPUT
Q6
R6
Q5
R15
R2
R1
R16
C1
R20
Q11
D1
Q7
Q18
Q4
Q2
Q14
Q1
Q3
R19
R14
R7
R22
R10
R3
D3
(2)
COMMON
zAbsolute maximum ratings (Ta=25°C)
^Common specifications for BA178M{{T / FP seriesp
Parameter
Symbol
Limits
Unit
VIN
35
V
Applied voltage
TO220FP
Power dissipation
2.0 ∗
Pd
1.0 ∗
TO252−3
W
Operating temperature
Topr
−40~+85
°C
Storage temperature
Tstg
−55~+150
°C
∗ Reduced by 16 mW (TO220FP) and 8 mW (TO252-3) for each increase in Ta of 1°C over 25°C
(without heat sink).
zRecommended operating conditions (Ta=25°C)
BA178M06T / FP
BA178M05T / FP
Parameter
Symbol
Min.
Typ.
Max.
Unit
Symbol
Min.
Typ.
Max.
Input voltage
VIN
7.5
−
20
V
Input voltage
VIN
8.5
−
21
V
IO
−
−
A
Output current
IO
−
−
0.5
A
Unit
Output current
0.5
Parameter
Unit
BA178M08T / FP
BA178M07T / FP
Symbol
Min.
Typ.
Max.
Unit
Symbol
Min.
Typ.
Max.
Input voltage
VIN
9.5
−
22
V
Input voltage
VIN
10.5
−
23
V
Output current
IO
−
−
0.5
A
Output current
IO
−
−
0.5
A
Symbol
Min.
Typ.
Max.
Unit
Parameter
BA178M10T / FP
BA178M09T / FP
Parameter
Parameter
Symbol
Min.
Input voltage
VIN
11.5
Output current
IO
−
Typ.
Parameter
Max.
Unit
−
24
V
Input voltage
VIN
12.5
−
25
V
−
0.5
A
Output current
IO
−
−
0.5
A
BA178M{{T / FP Series
Regulator ICs
BA178M15T / FP
BA178M12T / FP
Parameter
Symbol
Min.
Typ.
Max.
Unit
Symbol
Min.
Typ.
Max.
Unit
Input voltage
VIN
15
−
27
V
Input voltage
VIN
17.5
−
30
V
Output current
IO
−
−
0.5
A
Output current
IO
−
−
0.5
A
Parameter
BA178M18T / FP
Parameter
BA178M20T / FP
Symbol
Min.
Typ.
Max.
Unit
Symbol
Min.
Typ.
Max.
Unit
Input voltage
VIN
21
−
33
V
Input voltage
VIN
23
−
33
V
Output current
IO
−
−
0.5
A
Output current
IO
−
−
0.5
A
Parameter
BA178M24T / FP
Symbol
Min.
Typ.
Max.
Unit
Input voltage
Parameter
VIN
27
−
33
V
Output current
IO
−
−
0.5
A
zElectrical characteristics
<BA178M05T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=10V, IO=350mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Measurement
circuit
Output voltage 1
VO1
4.8
5.0
5.2
V
IO=350mA
Fig.1
Output voltage 2
VO2
4.75
−
5.25
V
VIN=7.5~20V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
3
100
mV
VIN=7~25V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
1
50
mV
VIN=8~12V, IO=200mA
Fig.1
R.R.
62
78
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
100
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
50
mV
IO=5~200mA
Fig.1
Ripple rejection ratio
TCVO
−
−1.0
−
Output noise voltage
Vn
−
40
−
Minimum I/O voltage differential
Vd
−
2.0
Bias current
Ib
−
4.5
Bias current change 1
Ib1
−
−
0.5
Bias current change 2
Ib2
−
−
0.8
Peak output current
IO−P
−
875
Output short-circuit current
IOS
−
0.4
Temperature coefficient of output voltage
mV/°C IO=5mA, Tj=0~125°C
Fig.1
µV
f=10Hz~100kHz
−
V
IO=500mA
Fig.4
6.0
mA
IO=0mA
Fig.5
mA
IO=5~350mA
Fig.5
mA
VIN=8~25V, IO=200mA
Fig.5
−
mA
Tj=25°C
Fig.1
−
A
VIN=25V
Fig.6
Fig.3
BA178M{{T / FP Series
Regulator ICs
<BA178M06T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=11V, IO=350mA)
Parameter
Unit
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Output voltage 1
VO1
5.75
6.0
6.25
V
IO=350mA
Fig.1
Output voltage 2
VO2
5.7
−
6.3
V
VIN=8.5~21V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
3
100
mV
VIN=8~25V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
1
50
mV
VIN=9~25V, IO=200mA
Fig.1
R.R.
60
74
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
120
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
60
mV
IO=5~200mA
Fig.1
TCVO
−
−0.5
−
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
60
−
Minimum I/O voltage differential
Vd
−
2.0
Bias current
Ib
−
4.5
Bias current change 1
Ib1
−
−
Bias current change 2
Ib2
−
−
Peak output current
IO−P
−
Output short-circuit current
IOS
−
Ripple rejection ratio
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
−
V
IO=500mA
Fig.4
6.0
mA
IO=0mA
Fig.5
0.5
mA
IO=5~350mA
Fig.5
0.8
mA
VIN=9~25V, IO=200mA
Fig.5
875
−
mA
Tj=25°C
Fig.1
0.4
−
A
VIN=25V
Fig.6
<BA178M07T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=13V, IO=350mA)
Parameter
Output voltage 1
Symbol
Min.
Typ.
Max.
Unit
VO1
6.7
7.0
7.3
V
Conditions
Measurement
circuit
IO=350mA
Fig.1
VO2
6.65
−
7.35
V
VIN=9.5~22V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
4
100
mV
VIN=9~25V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
1
50
mV
VIN=10~25V, IO=200mA
Fig.1
R.R.
57
71
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
140
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
70
mV
IO=5~200mA
Fig.1
Output voltage 2
Ripple rejection ratio
TCVO
−
−0.5
−
mV/°C
IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
70
−
µV
f=10Hz~100kHz
Fig.3
Minimum I/O voltage differential
Vd
−
2.0
−
V
IO=500mA
Fig.4
Bias current
Ib
−
4.5
6.0
mA
IO=0mA
Fig.5
Bias current change 1
Ib1
−
−
0.5
mA
IO=5~350mA
Fig.5
Temperature coefficient of output voltage
Ib2
−
−
0.8
mA
VIN=10~25V, IO=200mA
Fig.5
Peak output current
IO−P
−
875
−
mA
Tj=25°C
Fig.1
Output short-circuit current
IOS
−
0.4
−
A
VIN=25V
Fig.6
Bias current change 2
BA178M{{T / FP Series
Regulator ICs
<BA178M08T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=14V, IO=350mA)
Parameter
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Unit
Output voltage 1
VO1
7.7
8.0
8.3
V
IO=350mA
Fig.1
Output voltage 2
VO2
7.6
−
8.4
V
VIN=10.5~23V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
4
100
mV
VIN=10.5~25V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
1
50
mV
VIN=11~12V, IO=200mA
Fig.1
R.R.
56
69
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
160
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
80
mV
IO=5~200mA
Fig.1
TCVO
−
−0.5
−
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
80
−
Minimum I/O voltage differential
Vd
−
2.0
Bias current
Ib
−
4.5
Bias current change 1
Ib1
−
−
0.5
Bias current change 2
Ib2
−
−
0.8
Peak output current
IO−P
−
875
−
Output short-circuit current
IOS
−
0.4
−
Ripple rejection ratio
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
−
V
IO=500mA
Fig.4
6.0
mA
IO=0mA
Fig.5
mA
IO=5~350mA
Fig.5
mA
VIN=10.5~25V, IO=200mA
Fig.5
mA
Tj=25°C
Fig.1
A
VIN=25V
Fig.6
<BA178M09T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=15V, IO=350mA)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Measurement
circuit
Output voltage 1
VO1
8.6
9.0
9.4
V
IO=350mA
Fig.1
Output voltage 2
VO2
8.55
−
9.45
V
VIN=11.5~24V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
4
100
mV
VIN=11.5~26V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
2
50
mV
VIN=12~25V, IO=200mA
Fig.1
R.R.
56
67
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
180
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
90
mV
IO=5~200mA
Fig.1
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Ripple rejection ratio
TCVO
−
−0.5
−
Output noise voltage
Vn
−
90
−
Minimum I/O voltage differential
Vd
−
2.0
Bias current
Ib
−
4.5
Bias current change 1
Ib1
−
−
0.5
Bias current change 2
Ib2
−
−
0.8
Peak output current
IO−P
−
875
Output short-circuit current
IOS
−
0.17
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
−
V
IO=500mA
Fig.4
6.0
mA
IO=0mA
Fig.5
mA
IO=5~350mA
Fig.5
mA
VIN=12~25V, IO=200mA
Fig.5
−
mA
Tj=25°C
Fig.1
−
A
VIN=30V
Fig.6
BA178M{{T / FP Series
Regulator ICs
<BA178M10T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=16V, IO=350mA)
Parameter
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Unit
Output voltage 1
VO1
9.6
10.0
10.4
V
IO=350mA
Fig.1
Output voltage 2
VO2
9.5
−
10.5
V
VIN=12.5~25V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
5
100
mV
VIN=12.5~28V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
2
50
mV
VIN=14~26V, IO=200mA
Fig.1
R.R.
56
66
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
200
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
100
mV
IO=5~200mA
Fig.1
TCVO
−
−0.5
−
mV/°C
IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
100
−
µV
f=10Hz~100kHz
Fig.3
Minimum I/O voltage differential
Vd
−
2.0
−
V
IO=500mA
Fig.4
Bias current
Ib
−
4.5
6.0
mA
IO=0mA
Fig.5
Bias current change 1
Ib1
−
−
0.5
mA
IO=5~350mA
Fig.5
Bias current change 2
Ib2
−
−
0.8
mA
VIN=13~25V, IO=200mA
Fig.5
Peak output current
IO−P
−
875
−
mA
Tj=25°C
Fig.1
Output short-circuit current
IOS
−
0.17
−
A
VIN=30V
Fig.6
Ripple rejection ratio
Temperature coefficient of output voltage
<BA178M12T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=19V, IO=350mA)
Parameter
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Unit
Output voltage 1
VO1
11.5
12.0
12.5
V
IO=350mA
Fig.1
Output voltage 2
VO2
11.4
−
12.6
V
VIN=15~27V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
5
100
mV
VIN=14.5~30V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
3
50
mV
VIN=16~30V, IO=200mA
Fig.1
R.R.
55
63
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
240
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
120
mV
IO=5~200mA
Fig.1
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Ripple rejection ratio
TCVO
−
−0.5
−
Output noise voltage
Vn
−
110
−
Minimum I/O voltage differential
Vd
−
2.0
−
V
Bias current
Ib
−
4.5
6.0
mA
Bias current change 1
Ib1
−
−
0.5
mA
IO=5~350mA
Fig.5
Bias current change 2
Ib2
−
−
0.8
mA
VIN=14.5~30V, IO=200mA
Fig.5
Peak output current
IO−P
−
875
−
mA
Tj=25°C
Fig.1
Output short-circuit current
IOS
−
0.17
−
A
VIN=30V
Fig.6
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
IO=500mA
Fig.4
IO=0mA
Fig.5
BA178M{{T / FP Series
Regulator ICs
<BA178M15T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=23V, IO=350mA)
Parameter
Output voltage 1
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Unit
VO1
14.4
15.0
15.6
V
IO=350mA
Fig.1
VIN=17.5~30V, IO=5~350mA
Fig.1
VO2
14.25
−
15.75
V
Input stability 1
Reg.I1
−
6
100
mV
VIN=17.5~30V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
3
50
mV
VIN=20~30V, IO=200mA
Fig.1
Output voltage 2
R.R.
54
60
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
300
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
150
mV
IO=5~200mA
Fig.1
TCVO
−
−0.6
−
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
130
−
Minimum I/O voltage differential
Vd
−
2.0
−
Ripple rejection ratio
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
V
IO=500mA
Fig.4
Fig.5
Ib
−
4.5
6.0
mA
IO=0mA
Bias current change 1
Ib1
−
−
0.5
mA
IO=5~350mA
Fig.5
Bias current change 2
Ib2
−
−
0.8
mA
VIN=17.5~30V, IO=200mA
Fig.5
Peak output current
IO−P
−
875
−
mA
Tj=25°C
Fig.1
Output short-circuit current
IOS
−
0.17
−
A
VIN=30V
Fig.6
Bias current
<BA178M18T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=27V, IO=350mA)
Parameter
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Unit
Output voltage 1
VO1
17.3
18.0
18.7
V
IO=350mA
Fig.1
Output voltage 2
VO2
17.1
−
18.9
V
VIN=21~33V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
7
100
mV
VIN=21~33V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
3
50
mV
VIN=24~33V, IO=200mA
Fig.1
R.R.
53
58
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
360
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
180
mV
IO=5~200mA
Fig.1
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Ripple rejection ratio
TCVO
−
−0.6
−
Output noise voltage
Vn
−
140
−
Minimum I/O voltage differential
Vd
−
2.0
−
V
Bias current
Ib
−
4.5
6.0
mA
Bias current change 1
Ib1
−
−
0.5
mA
IO=5~350mA
Fig.5
Bias current change 2
Ib2
−
−
0.8
mA
VIN=21~33V, IO=200mA
Fig.5
Peak output current
IO − P
−
875
−
mA
Tj=25°C
Fig.1
Output short-circuit current
IOS
−
0.17
−
A
VIN=30V
Fig.6
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
IO=500mA
Fig.4
IO=0mA
Fig.5
BA178M{{T / FP Series
Regulator ICs
<BA178M20T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=29V, IO=350mA)
Parameter
Max.
Unit
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Output voltage 1
VO1
19.2
20.0
20.8
V
IO=350mA
Fig.1
Output voltage 2
VO2
19.0
−
21.0
V
VIN=23~33V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
8
100
mV
VIN=23~33V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
4
50
mV
VIN=24~33V, IO=200mA
Fig.1
R.R.
53
58
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
400
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
200
mV
IO=5~200mA
Fig.1
TCVO
−
−0.7
−
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
150
−
Mninimum I/O voltage differential
Vd
−
2.0
Bias current
Ib
−
4.5
Bias current change 1
Ib1
−
−
Bias current change 2
Ib2
−
−
Peak output current
IO−P
−
Output short-circuit current
IOS
−
Ripple rejection ratio
Temperature coefficient of output voltage
µV
f=10Hz~100kHz
Fig.3
−
V
IO=500mA
Fig.4
6.0
mA
IO=0mA
Fig.5
0.5
mA
IO=5~350mA
Fig.5
0.8
mA
VIN=23~33V, IO=200mA
Fig.5
875
−
mA
Tj=25°C
Fig.1
0.17
−
A
VIN=30V
Fig.6
<BA178M24T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=33V, IO=350mA)
Parameter
Output voltage 1
Conditions
Measurement
circuit
Symbol
Min.
Typ.
Max.
Unit
VO1
23.0
24.0
25.0
V
IO=350mA
Fig.1
VO2
22.8
−
25.2
V
VIN=27~33V, IO=5~350mA
Fig.1
Input stability 1
Reg.I1
−
10
100
mV
VIN=27~33V, IO=200mA
Fig.1
Input stability 2
Reg.I2
−
5
50
mV
VIN=28~33V, IO=200mA
Fig.1
R.R.
50
55
−
dB
eIN=1Vrms, f=120Hz, IO=100mA
Fig.2
Load regulation 1
Reg.L1
−
20
480
mV
IO=5~500mA
Fig.1
Load regulation 2
Reg.L2
−
10
240
mV
IO=5~200mA
Fig.1
TCVO
−
−0.7
−
mV/°C IO=5mA, Tj=0~125°C
Fig.1
Output noise voltage
Vn
−
170
−
µV
f=10Hz~100kHz
Fig.3
Minimum I/O voltage differential
Vd
−
2.0
−
V
IO=500mA
Fig.4
Bias current
Ib
−
4.8
6.0
mA
IO=0mA
Fig.5
Bias current change 1
Ib1
−
−
0.5
mA
IO=5~350mA
Fig.5
Output voltage 2
Ripple rejection ratio
Temperature coefficient of output voltage
Ib2
−
−
0.8
mA
VIN=27~33V, IO=200mA
Fig.5
Peak output current
IO−P
−
875
−
mA
Tj=25°C
Fig.1
Output short-circuit current
IOS
−
0.17
−
A
VIN=30V
Fig.6
Bias current change 2
BA178M{{T / FP Series
Regulator ICs
zMeasurement circuits
INPUT
0.1µF
0.33µF
VIN
V VIN
OUTPUT
10Ω5W
INPUT
V
IO
COMMON
OUTPUT
0.1µF
100µF
0.33µF
eOUT
V
COMMON
IO
eIN=1Vrms
f=120Hz
Ripple rejection ratioR.R.=20 log
Fig. 1 Measurement circuit for output voltage,
input stability, load regulation,
temperature coefficient of output voltage
INPUT
OUTPUT
VIN
BPF
IO
10Hz~
100kHz
COMMON
eIN
eOUT
)
Fig. 2 Measurement circuit for ripple rejection ratio
10µF
+
0.1 µF
0.33µF
(
V
INPUT
Noise
meter
OUTPUT
0.33µF
0.1µF
VIN
V
IO
COMMON
∆V=
100mV
500mA
Fig. 3 Measurement circuit for output noise voltage
INPUT
INPUT
OUTPUT
0.33 µF
VIN
Fig. 4 Measurement circuit for Minimum
I/O voltage differential
0.1 µF
OUTPUT
0.33µF
V
COMMON
0.1µF
VIN
IO
IO A
COMMON
A
Fig. 5 Measurement circuit for bias current
and bias current change
Fig. 6 Measurement circuit for
Fig. 10output short-circuit current
zElectrical characteristic curves
25
6
VIN=10V, IOUT=0
BA178M05T
8
6
4
2
(1) Infinite heat sink, θj−c = 5.7 (°C / W)
(2) 100×100×2 (mm3), with Al heat sink
(3) 50×50×2 (mm3), with Al heat sink
(4) No heat sink θj−a = 62.5 (°C / W)
(1) 22.0
POWER DISSIPATION : Pd (W)
VIN=10V
BA178M05T
OUTPUT VOLTAGE : VOUT (V)
OUTPUT VOLTAGE : VOUT (V)
10
5
4
3
2
1
20
15
(2) 11.0
10
(3) 6.5
5
(4) 2.0
0
0.2
0.4
0.6
0.8
1.0
0
25
50
75
100
125
150
175
200
0
25
50
75
100
125
150
OUTPUT CURRENT : IOUT (A)
JUNCTION TEMPERATURE : Tj (°C)
AMBIENT TEMPERATURE : Ta (°C)
Fig. 7 Current limit characteristics
Fig. 8 Thermal cutoff circuit
characteristics
Fig.9 Thermal derating characteristic
(TO220FP)
BA178M{{T / FP Series
Regulator ICs
POWER DISSIPATION : Pd (W)
12.5
(1) Infinite heat sink, θj−c=12.5 (°C / W)
(2) No heat sink θj−c=125.0 (°C /W)
(1) 10.0
10
7.5
5
2.5
(2) 1.0
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE : Ta (°C)
Fig.10 Thermal derating characteristic
(TO252−3)
zOperation notes
(1) Although the circuit examples included in this handbook are highly recommendable for general use, you should
thoroughly familiar yourself with the circuit characteristics as they relate to your own conditions. If you intend
to change the number of external circuits, leave an ample margin, taking into account discrepancies in both static
and dynamic characteristics of external parts and Rohm ICs. In addition, please be advised that Rohm cannot
provide complete assurance regarding patent rights.
(2) Operating power supply voltage
When operating within the normal voltage range and within the ambient operating temperature range, most circuit
functions are guaranteed. The rated values cannot be guaranteed for the electrical characteristics, but there are no
sudden changes of the characteristics within these ranges.
(3) Power dissipation
Heat attenuation characteristics are noted on a separate page and can be used as a guide in judging power
dissipation.
If these ICs are used in such in a way that the allowable power dissipation level is exceeded, an increase in the chip
temperature could cause a reduction in the current capability or could otherwise adversely affect the performance of
the IC. Make sure a sufficient margin is allowed so that the allowable power dissipation value is not exceeded.
(4) Preventing oscillation in output and using bypass capacitors
Always use a capacitor between the output pins and the GND to prevent fluctuation in the output and to prevent
oscillation between the output pins and the GND of the application’s input (VIN µF should be used.)
Changes in the temperature and other factors can cause the value of the capacitor to change, and this can cause
oscillation. To prevent this, we recommend using a tantalum capacitor which has minimal changes in nominal
capacitance.
Also, we recommend adding a bypass capacitor of about 0.33µF between the input pin and the GND, as close to the
pin as possible.
(5) Thermal overload circuit
A built-in thermal overload circuit prevents damage from overheating. When the thermal circuit is activated, the various
outputs are in the OFF state. When the temperature drops back to a constant level, the circuit is restored.
(6) Internal circuits could be damaged if there are modes in which the electric potential of the application’s input (VIN) and
GND are the opposite of the electric potential of the various outputs. Use of a diode or other such bypass path is
recommended.
(7) Although the manufacture of this product includes rigorous quality assurance procedures, the product may be
damaged if absolute maximum ratings for voltage or operating temperature are exceeded. If damage has occurred,
special modes (such as short circuit mode or open circuit mode) cannot be specified. If it is possible that such special
modes may be needed, please consider using a fuse or some other mechanical safety measure.
(8) When used within a strong magnetic field, be aware that there is a slight possibility of malfunction.
BA178M{{T / FP Series
Regulator ICs
zExternal dimensions (Units : mm)
BA178MOOFP Series
BA178MOOT Series
4.5 +0.3
−0.1
2.8 +0.2
−0.1
φ3.1±0.1
6.5±0.2
5.0 +0.2
−0.1
0.8
2.54±0.5
2.54±0.5
0.55 +0.1
−0.05
0.5±0.1
9.5±0.5
(1)
2
3
1.5
2.5
1
0.65
2.3±0.2
0.8
7.0±0.3
1.3
2.3±0.2
5.5±0.2
8.0±0.2
12.0±0.2
7.0 +0.3
−0.1
5.0±0.2
13.5Min.
17.0 +0.4
−0.2
1.8±0.2
10.0 +0.3
−0.1
0.65
2.3±0.2
(3)
(1) (2) (3)
(1) (2) (3)
TO220FP
0.5±0.1
(1) INPUT
(2) COMMON
(3) OUTPUT
2.6±0.5
(1) INPUT
(2) COMMON
(3) OUTPUT
TO252−3