BA178!!T / FP series
Regulator ICs
Standard 78 series, 3-pin regulator
BA178!!
The BA178!!T and BA178!!FP series are 3pin 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 1A for each of the above voltages.
""""
Application
Constant voltage power supply
""""Features
1) Built-in overcurrent protection circuit and thermal shutdown circuit.
2) Excellent ripple regulation.
3) Available in TO220FP 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, 24V).
""""Product codes
Output voltage (V) Product name Output voltage (V) Product name
!!T / FP series
!!!!
512
615
718
820
924
10 −−
BA17805T / FP
BA17806T / FP
BA17807T / FP
BA17808T / FP
BA17809T / FP
BA17810T / FP
BA17812T / FP
BA17815T / FP
BA17818T / FP
BA17820T / FP
BA17824T / FP
Regulator ICs
""""Internal circuit configuration diagram
R
4
R
10
Q
12
R
5
R
6
D
1
R
7
Q
Q
18
Q
14
R
22
BA178!!T / FP series
(1)
R
8
13
Q
5
R
R
1
Q
7
Q
Q
1
R
18
R
9
R
Q
8
Q
10
Q
6
R
15
R
2
2
16
C
1
Q
4
R
14
R
3
D
3
13
D
Q
2
9
Q
16
Q
15
Q
11
Q
3
R
R
12
21
R
17
R
20
R
19
INPUT
Q
17
R
11
(3)
OUTPUT
(2)
COMMON
""""Absolute maximum ratings (Ta=25°C)
^Common specifications for BA178!!T / FP seriesp
Parameter Symbol Limits Unit
Applied voltage V
Power
dissipation
TO220FP
TO252-3
IN
Pd
Operating temperature Topr ˚C
Storage temperature Tstg ˚C
Reduced by 16 mW / ˚C (TO220FP) and 8 mW / ˚C (TO252-3) for each increase in Ta of 1˚C over 25˚C
∗
(without heat sink).
35 V
∗
2.0
∗
1.0
−40∼+85
−55∼+150
W
""""Recommended operating conditions (Ta=25°C)
BA17806T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage 8.5 − 21 V
Output current
BA17808T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
BA17805T / FP
Parameter Symbol Min. Typ.
V
Input voltage 7.5 − 25 V
Output current − 1A−
IN
I
O
Max. Unit
BA17807T / FP
Parameter Symbol Min. Typ. Max. Unit
V
Input voltage
Output current
IN
9.5 − 22 V
I
O
−−1A
V
IN
I
O
−−1A
V
IN
10.5 − 23 V
I
O
−−1A
Regulator ICs
BA178!!T / FP series
BA17809T / FP
Parameter Symbol Min. Typ. Max. Unit
V
Input voltage
Output current
IN
11.5 − 26 V
I
O
−−1A
BA17812T / FP
Parameter Symbol Min. Typ. Max. Unit
V
Input voltage
Output current
IN
15 − 27 V
I
O
−−1A
BA17818T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
V
I
21 − 33 V
IN
O
−−1A
BA17824T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
V
IN
27 − 33 V
O
I
−−1A
BA17810T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
12.5 − 25 V
IN
V
I
O
−−1A
BA17815T / FP
Parameter Symbol Min. Typ. Max. Unit
V
Input voltage
Output current
IN
17.5 − 30 V
I
O
−−1A
BA17820T / FP
Parameter Symbol Min. Typ. Max. Unit
V
Input voltage
Output current
IN
23 − 33 V
I
O
−−1A
""""Electrical characteristics
<BA17805T / FP individual specifications> (unless otherwise noted, Ta=25°C, V
Parameter Symbol Min. Typ. Max. Unit Conditions
Output voltage 1 V
Output voltage 2 V
Input stability 1 Reg.I
Input stability 2 Reg.I
Ripple rejection ratio R.R. 62 78 − dB
Load regulation 1 Reg.L
Load regulation 2 Reg.L
Temperature coefficient of output voltage T
Output noise voltage V
Minimum I/O voltage differential V
Bias current I
Bias current change 1 I
Bias current change 2 I
Peak output current I
Output short-circuit current I
O1
4.8 5.0 5.2 V IO=500mA
O2
4.75 − 5.25 V
1
− 3 100 mV
2
− 150mV
1
− 15 100 mV IO=5mA∼1A
2
− 550mVIO=250∼750mA
CVO
−−1.0 − mV/˚C
n
− 40 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.5 8.0 mA IO=0mA
b1
−−0.5 mA
b2
−−0.8 mA
O-P
− 1.7 − ATj=25˚C
OS
− 0.6 − AVIN=25V
IN
V
VIN=7∼25V, IO=500mA
VIN=8∼12V, IO=500mA
e
IN
O
=5mA, Tj=0∼125˚C
I
O
=5mA∼1A
I
V
IN
=10V, IO=500mA)
IN
=7.5∼20V, IO=5mA∼1A
=1Vrms, f=120Hz, IO=100mA
=8∼25V
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
BA178!!T / FP series
Regulator ICs
<BA17806T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=11V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
V
O1
5.75 6.0 6.25 V I
V
O2
5.7 − 6.3 V
Reg.I
1
− 4 120 mV
Reg.I
2
− 260mV
R.R. 59 73 − dB
Reg.L
1
− 16 120 mV I
Reg.L
2
− 660mVI
CVO
T
V
V
I
I
I
I
O-P
OS
I
−−0.5 − mV/˚C
n
− 60 −µVf=10Hz∼100kHz
d
− 2.0 − VI
b
− 4.5 8.0 mA I
b1
−−0.5 mA
b2
−−0.8 mA
− 1.7 − AT
− 0.6 − AV
O
=
500mA
IN
=
8.5∼21V, I
V
V
IN
=
8∼25V, I
V
IN
=
9∼13V, I
e
IN
=
1Vrms, f=120Hz, I
O
=
5mA∼1A
O
=
250∼750mA
O
=
5mA, T
j
=
1A
=
0mA
=
5mA∼1A
=
8.5∼25V
=
25˚C
=
25V
=
I
O
O
O
I
V
IN
j
IN
O
=
5mA∼1A
O
=
500mA
O
=
500mA
0∼125˚C
O
=
100mA
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
<BA17807T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=13V, IO=500mA)
Parameter Symbol Min. Typ. Max.
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
V
O1
6.7 7.0 7.3
O2
V
Reg.I
Reg.I
6.65 − 7.35
1
− 5 140
2
− 270
R.R. 57 69 −
Reg.L
1
− 17 140
Reg.L
2
− 670mVI
CVO
T
V
V
I
b
I
b1
I
b2
I
O-P
I
OS
n
d
−−0.5 −
− 70 −
− 2.0 −
− 4.5 8.5
−−0.5
−−0.8
− 1.7 −
− 0.6 −
Unit
V
V
mV
mV
dB
mV
mV/˚C
µV
V
mA
mA
mA
A
A
I
O
=
IN
V
V
IN
V
IN
e
IN
I
O
=
O
=
O
=
I
f=10Hz∼100kHz
I
O
=
I
O
=
O
=
I
V
IN
T
j
=
V
IN
Conditions
500mA
=
9.5∼22V, I
=
9∼25V, I
=
10∼15V, I
=
1Vrms, f=120Hz, I
O
O
=
O
=
5mA∼1A
500mA
=
500mA
5mA∼1A
250∼750mA
5mA, T
j
=
0∼125˚C
1A
0mA
5mA∼1A
=
9.5∼25V
25˚C
=
25V
O
=
100mA
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
BA178!!T / FP series
Regulator ICs
<BA17808T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=14V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
7.7 8.0 8.3 V I
V
O2
7.6 − 8.4 V
Reg.I1− 5 160 mV
Reg.I2− 380mV
R.R. 56 65 − dB
Reg.L
1
− 19 160 mV I
Reg.L
2
− 780mVI
CVO
T
−−0.5 − mV/˚C
V
n
− 80 −µVf=10Hz∼100kHz
d
− 2.0 − VI
V
I
b
− 4.5 8.0 mA I
I
b1
−−0.5 mA
I
b2
−−0.8 mA
I
O-P
− 1.7 − AT
OS
− 0.6 − AV
I
O
=
500mA
IN
=
10.5∼23V, I
V
V
IN
=
10.5∼25V, I
V
IN
=
11∼17V, I
e
IN
=
1Vrms, f=120Hz, I
O
=
5mA∼1A
O
=
250∼750mA
O
=
5mA, T
j
=
1A
=
0mA
=
5mA∼1A
=
10.5∼25V
=
25˚C
=
25V
=
I
O
O
O
I
V
IN
j
IN
O
=
5mA∼1A
O
=
500mA
O
=
500mA
0∼125˚C
O
=
100mA
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
<BA17809T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=15V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage diffrential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
R.R. 56 64 − dB
Reg.L
Reg.L2− 890mVIO=250∼750mA
T
8.6 9.0 9.4 V IO=500mA
O2
8.55 − 9.45 V
V
1
− 6 180 mV
2
− 490mV
1
− 20 180 mV IO=5mA∼1A
CVO
V
V
I
I
I
I
−−0.5 − mV/˚C
n
− 90 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.5 8.0 mA IO=0mA
I
b1
−−0.5 mA
b2
−−0.8 mA
O-P
− 1.7 − ATj=25˚C
OS
− 0.3 − AVIN=30V
IN
=11.5∼26V, IO=5mA∼1A
V
V
IN
=11.5∼26V, IO=500mA
IN
=13∼19V, IO=500mA
V
e
IN
=1Vrms, f=120Hz, IO=100mA
O
=5mA, Tj=0∼125˚C
I
IO=5mA∼1A
V
IN
=11.5∼26V
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
BA178!!T / FP series
Regulator ICs
<BA17810T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=16V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
R.R. 55 64 − dB
Reg.L
Reg.L
T
9.6 10.0 10.4 V IO=500mA
O2
9.5 − 10.5 V
V
1
− 7 200 mV
2
− 4 100 mV
1
− 21 200 mV IO=5mA∼1A
2
− 890mVIO=250∼750mA
CVO
−−0.5 − mV/˚C
V
n
− 100 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
V
b
− 4.5 8.0 mA IO=0mA
I
b1
−−0.5 mA
I
b2
−−0.8 mA
I
I
O-P
− 1.7 − ATj=25˚C
OS
I
− 0.3 − AVIN=30V
V
IN
=12.5∼25V, I
IN
=12.5∼27V, IO=500mA
V
IN
=14∼20V, IO=500mA
V
e
IN
=1Vrms, f=120Hz, IO=100mA
O
=5mA, Tj=0∼125˚C
I
I
O
=5mA∼1A
IN
=12.5∼27V
V
O
=
5mA∼1A
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
<BA17812T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=19V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
Reg.L
Reg.L2− 10 120 mV IO=250∼750mA
11.5 12.0 12.5 V IO=500mA
V
O2
11.4 − 12.6 V
1
− 8 240 mV
2
− 5 120 mV
R.R. 55 63 − dB
1
− 23 240 mV IO=5mA∼1A
T
CVO
V
V
I
I
I
I
−−
0.5
− mV/˚C
n
− 110 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.5 8.0 mA IO=0mA
I
b1
−−0.5 mA
b2
−−0.8 mA
O-P
− 1.7 − ATj=25˚C
OS
− 0.3 − AVIN=30V
IN
=15∼27V, IO=5mA∼1A
V
V
IN
=14.5∼30V, IO=500mA
IN
=16∼22V, IO=500mA
V
e
IN
=1Vrms, f=120Hz, IO=100mA
O
=5mA, Tj=0∼125˚C
I
I
O
=5mA∼1A
V
IN
=14.5∼30V
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
BA178!!T / FP series
Regulator ICs
<BA17815T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=23V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
R.R. 54 62 − dB
Reg.L
Reg.L
T
14.4 15.0 15.6 V IO=500mA
V
O2
14.25 − 15.75 V
1
− 9 300 mV
2
− 5 150 mV
1
− 27 300 mV IO=5mA∼1A
2
− 10 150 mV IO=250∼750mA
CVO
V
V
I
I
I
I
−−0.6 − mV/˚C
n
− 125 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.5 8.0 mA IO=0mA
I
b1
−−0.5 mA
b2
−−0.8 mA
O-P
− 1.7 − ATj=25˚C
OS
− 0.3 − AVIN=30V
IN
=17.5∼30V, IO=5mA∼1A
V
V
IN
=17.5∼30V, IO=500mA
IN
=20∼26V, IO=500mA
V
e
IN
=1Vrms, f=120Hz, IO=100mA
O
=5mA, Tj=0∼125˚C
I
I
O
=5mA∼1A
V
IN
=17.5∼30V
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
<BA17818T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=27V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
R.R. 55 61 − dB
Reg.L
Reg.L
T
17.3 18.0 18.7 V IO=500mA
V
O2
17.1 − 18.9 V
1
− 10 360 mV
2
− 5 180 mV
1
− 30 360 mV IO=5mA∼1A
2
− 12 180 mV IO=250∼750mA
I
I
CVO
V
V
I
I
I
O-P
OS
b1
b2
−−0.6 − mV/˚C
n
− 140 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.5 8.0 mA IO=0mA
−−0.5 mA
−−0.8 mA
− 1.7 − ATj=25˚C
− 0.3 − AVIN=30V
IN
=21∼33V, IO=5mA∼1A
V
V
IN
=21∼33V, IO=500mA
VIN=24∼33V, IO=500mA
IN
=1Vrms, f=120Hz, IO=100mA
e
I
O
=5mA, Tj=0∼125˚C
O
=5mA∼1A
I
V
IN
=21∼33V
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
BA178!!T / FP series
Regulator ICs
<BA17820T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=29V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
R.R. 53 60 − dB
Reg.L
Reg.L
T
19.2 20.0 20.8 V IO=500mA
O2
19.0 − 21.0 V
V
1
− 12 400 mV
2
− 7 200 mV
1
− 32 400 mV IO=5mA∼1A
2
− 14 200 mV IO=250∼750mA
CVO
V
V
I
b1
I
I
b2
O-P
I
I
OS
−−0.7 − mV/˚C
n
− 150 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.5 8.0 mA IO=0mA
−−0.5 mA
−−0.8 mA
− 1.7 − ATj=25˚C
− 0.3 − AVIN=30V
IN
=23∼33V, IO=5mA∼1A
V
V
IN
=23∼33V, IO=500mA
VIN=26∼32V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
I
O
=5mA, Tj=0∼125˚C
O
=5mA∼1A
I
V
IN
=23∼33V
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
<BA17824T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=33V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
V
O1
Output voltage 1
Output voltage 2
Input stability 1
Input stability 2
Ripple rejection ratio
Load regulation 1
Load regulation 2
Temperature coefficient of output voltage
Output noise voltage
Minimum I/O voltage differential
Bias current
Bias current change 1
Bias current change 2
Peak output current
Output short-circuit current
Reg.I
Reg.I
R.R. 50 58 − dB
Reg.L
Reg.L
T
23.0 24.0 25.0 V IO=500mA
O2
22.8 − 25.2 V
V
1
− 15 480 mV
2
− 10 240 mV
1
− 37 480 mV IO=5mA∼1A
2
− 15 240 mV IO=250∼750mA
CVO
V
V
I
b1
I
I
b2
I
O-P
OS
I
−−0.7 − mV/˚C
n
− 180 −µV f=10Hz∼100kHz
d
− 2.0 − VIO=1A
b
− 4.7 8.0 mA IO=0mA
−−0.5 mA
−−0.8 mA
− 1.7 − AT
− 0.3 − AVIN=30V
IN
=27∼33V, IO=5mA∼1A
V
V
IN
=27∼33V, IO=500mA
IN
=30∼33V, IO=500mA
V
IN
=1Vrms, f=120Hz, IO=100mA
e
I
O
=5mA, Tj=0∼125˚C
O
=5mA∼1A
I
V
IN
=27∼33V
=25˚C
j
Measurement
circuit
Fig.1
Fig.1
Fig.1
Fig.1
Fig.2
Fig.1
Fig.1
Fig.1
Fig.3
Fig.4
Fig.5
Fig.5
Fig.5
Fig.1
Fig.6
Regulator ICs
""""Measurement circuits
V
IN
0.33µF
Fig. 1 Measurement circuit for output voltage,
input stability,load regulation,
V
IN
temperature coefficient of output voltage
0.33µF
COMMON
COMMON
OUTPUTINPUT
BA178!!T / FP series
e
IN
V
~
OUTPUTINPUT
0.1µF
V
I
O
10µF
+
0.1
µF
BPF
10Hz∼
100kHz
Noise
meter
I
O
10Ω5W
100µF
V
IN
0.33µF
e
IN
=1Vrms
f=120Hz
Ripple rejection ratio R.R. = 20 log
Fig. 2 Measurement circuit for ripple rejection rario
0.33µF
V
IN
COMMON
V
OUTPUTINPUT
OUTPUTINPUT
COMMON
0.1µF
e
IN
()
e
OUT
0.1µF
I
O
IA
V
V
~
e
OUT
∆V=
100mA
I
O
Fig. 3 Measurement circuit for output noise voltage
µF
0.33
VIN
OUTPUTINPUT
COMMON
A
Fig. 5 Measurement circuit for bias
current and bias current change
""""Electrical characteristic curves
10
8
(V)
OUT
6
4
2
OUTPUT VOLTAGE : V
0
1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT CURRENT : I
Fig. 7 Current limit characteristics
VIN=10V
BA17805T
OUT
(A)
0.1
µF
IO
6
5
(V)
OUT
4
3
2
OUTPUT VOLTAGE : V
1
0
25 50 75 100 125 150 175 200
JUNCTION TEMPERATURE : Tj (˚C)
Fig. 8 Thermal cutoff circuit
Fig. 2 characteristics
VIN=10V, I
BA17805T
Fig. 4
Measurement
circuit for Minimum
I / O voltage differential
0.33
µF
VIN
OUTPUTINPUT
COMMON
Fig. 6 Measurement circuit for
Fig. 1 output short-circuit current
=0
(1) 22.0
20
15
(2) 11.0
10
(3) 6.5
5
POWER DISSIPATION : Pd (W)
(4) 2.0
0 25 50 75 100 125 150
AMBIENT TEMPERATURE : Ta (˚C)
25
OUT
Fig.9 Ta - power dissipation
0.1
µF
A
I
O
(1) Infinite heat sink, θj-c = 5.7 (˚C/W)
(2) 100×100×2 (mm
(3) 50×50×2 (mm
(4) No heat sink θj-a = 62.5 (˚C/W)
3
), with Al heat sink
3
), with Al heat sink
Note: With Al heat sink, tightening
torque = 6 kg/cm and silicon
grease as lubricant
characteristics (TO220)
BA178!!T / FP series
Regulator ICs
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
POWER DISSIPATION : Pd (W)
(2) 1.0
0
0 25 50 75 100 125 150
AMBIENT TEMPERATURE : Ta (˚C)
Fig.10 Ta - power dissipation
Fig.3 characteristics (TO252-3)
""""
Operation notes
(1) Although the circuit examples included in this handbook are highly recommendable for general use, you should be
thoroughly familiar with circuit characteristics as they relate to your own use 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 can not 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 (V
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 (V
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, it may be be damaged if
absolute maximum ratings for voltage or operating temperature are exceeded. When 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.
0.1µF should be used.)
IN
IN
) and
Regulator ICs
""""External dimensions (Units : mm)
BA178!!T / FP series
BA178OOT series
1.8±0.2
+0.4
−0.2
17.0
12.0±0.2
8.0±0.2
5.0±0.2
13.5Min.
2.54±0.5 2.54±0.5 2.6±0.5
+0.3
10.0
−0.1
+0.3
7.0
−0.1
(1) (2) (3)
(1) (2) (3)
BA178OOFP series
+0.3
4.5
−0.1
φ3.1±0.1
1.3
0.8
+0.1
0.55
−0.05
+0.2
2.8
−0.1
(1) INPUT
(2) COMMON
(3) OUTPUT
6.5±0.2
+0.2
5.0
−0.1
(2)
7.0±0.3
5.5±0.2
0.8
0.65 0.65
2.3±0.2 2.3±0.2 0.5±0.1
(1) (3)
2.3±0.2
(1) INPUT
(2) COMMON
(3) OUTPUT
0.5±0.1
9.5±0.5
1.5
2.5
TO252-3TO220FP
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