BA178!!T / FP series
Regulator ICs
Standard 78 series, 3-pin regulator
BA178!!
!!!!
!!T / FP series
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
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
BA178!!T / FP series
Regulator ICs
"
""
"Internal circuit configuration diagram
R
4
R
2
R
16
R
15
C
1
R
10
R
8
R
9
R
11
R
12
R
20
R
19
R
21
R
17
R
13
D
2
R
5
R
6
R
1
R
7
R
22
R
18
R
3
R
14
D
3
D
1
Q
3
Q
11
Q
4
Q
2
Q
7
Q
5
Q
13
Q
12
Q
10
Q
6
Q
8
Q
9
Q
15
Q
16
Q
17
Q
1
Q
14
Q
18
(2)COMMON
(3)OUTPUT
(1)INPUT
"
""
"Absolute maximum ratings (Ta=25°C)
^Common specifications for BA178!!T / FP seriesp
Parameter Symbol Limits Unit
Applied voltage VIN 35 V
Power
dissipation TO220FP W
Operating temperature Topr ˚C
Storage temperature Tstg ˚C
2.0
∗
1.0
∗
∗ 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).
TO252-3 Pd
−40∼+85
−55∼+150
"
""
"Recommended operating conditions (Ta=25°C)
Parameter Symbol Min. Typ.
BA17805T / FP
Max. Unit
Input voltage 7.5 −25 V
Output current −1A−
VIN
IO
Parameter Symbol Min. Typ. Max. Unit
Input voltage 8.5 −21 V
Output current
−−1A
VIN
IO
BA17806T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
9.5 −22 V
−−1A
VIN
IO
BA17807T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
10.5 −23 V
−−1A
VIN
IO
BA17808T / FP
BA178!!T / FP series
Regulator ICs
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
11.5 −26 V
−−1A
VIN
IO
BA17809T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
12.5 −25 V
−−1A
VIN
IO
BA17810T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
15 −27 V
−−1A
VIN
IO
BA17812T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
17.5 −30 V
−−1A
VIN
IO
BA17815T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
21 −33 V
−−1A
VIN
IO
BA17818T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
23 −33 V
−−1A
VIN
IO
BA17820T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
Output current
VIN 27 −33 V
IO−−1A
BA17824T / FP
"
""
"Electrical characteristics
<BA17805T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=10V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
Output voltage 1 VO1 4.8 5.0 5.2 V IO=500mA
Output voltage 2 VO2 4.75 −5.25 V
Input stability 1 Reg.I1−3 100 mV
Input stability 2 Reg.I2−150mV
Ripple rejection ratio R.R. 62 78 −dB
Load regulation 1 Reg.L1−15 100 mV IO=5mA∼1A
Load regulation 2 Reg.L2−550mVIO=250∼750mA
Temperature coefficient of output voltage TCVO −−1.0 −mV/˚C
Output noise voltage Vn−40 −µV f=10Hz∼100kHz
Minimum I/O voltage differential Vd−2.0 −VIO=1A
Bias current Ib−4.5 8.0 mA IO=0mA
Bias current change 1 Ib1 −−0.5 mA
Bias current change 2 Ib2 −−0.8 mA
Peak output current IO-P −1.7 −AT
j=25˚C
Output short-circuit current IOS −0.6 −AVIN=25V
VIN=7.5∼20V, IO=5mA∼1A
VIN=7∼25V, IO=500mA
VIN=8∼12V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=8∼25V
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
IO=5mA∼1A
BA178!!T / FP series
Regulator ICs
<BA17806T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=11V, IO=500mA)
Output voltage 1
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
VO1 5.75 6.0 6.25 V IO=500mA
VO2 5.7 −6.3 V
Reg.I1−4 120 mV
Reg.I2−260mV
R.R. 59 73 −dB
Reg.L1−16 120 mV IO=5mA∼1A
Reg.L2−660mVIO=250∼750mA
TCVO −−0.5 −mV/˚C
Vn−60 −µVf=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −ATj=25˚C
IOS −0.6 −AVIN=25V
VIN=8.5∼21V, IO=5mA∼1A
VIN=8∼25V, IO=500mA
VIN=9∼13V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
V
IN
=8.5∼25V
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
I
O
=5mA∼1A
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
<BA17807T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=13V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
VO1 6.7 7.0 7.3 VIO=500mA
VO2 6.65 −7.35 V
Reg.I1−5 140 mV
Reg.I2−270
mV
R.R. 57 69 −dB
Reg.L1−17 140 mV IO=5mA∼1A
Reg.L2−670
mV IO=250∼750mA
TCVO −−0.5 −mV/˚C
Vn−70 −µVf=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.5 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −ATj=25˚C
IOS −0.6 −AVIN=25V
VIN=9.5∼22V, IO=5mA∼1A
VIN=9∼25V, IO=500mA
VIN=10∼15V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=9.5∼25V
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
IO=5mA∼1A
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
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
Measurement
circuit
VO1 7.7 8.0 8.3 V IO=500mA
VO2 7.6 −8.4 V
Reg.I1−5 160 mV
Reg.I2−380mV
R.R. 56 65 −dB
Reg.L1−19 160 mV IO=5mA∼1A
Reg.L2−780mVIO=250∼750mA
TCVO −−0.5 −mV/˚C
Vn−80 −µVf=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −ATj=25˚C
IOS −0.6 −AVIN=25V
VIN=10.5∼23V, IO=5mA∼1A
VIN=10.5∼25V, IO=500mA
VIN=11∼17V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=10.5∼25V
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
IO=5mA∼1A
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
<BA17809T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=15V, IO=500mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
VO1 8.6 9.0 9.4 V IO=500mA
VO2 8.55 −9.45 V
Reg.I1−6 180 mV
Reg.I2−490mV
R.R. 56 64 −dB
Reg.L1−20 180 mV IO=5mA∼1A
Reg.L2−890mVIO=250∼750mA
TCVO −−0.5 −mV/˚C
Vn−90 −µV f=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −AT
j=25˚C
IOS −0.3 −AVIN=30V
VIN=11.5∼26V, IO=5mA∼1A
VIN=11.5∼26V, IO=500mA
VIN=13∼19V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=11.5∼26V
IO=5mA∼1A
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
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
Measurement
circuit
V
O1
9.6 10.0 10.4 V I
O
=500mA
V
O2
9.5 −10.5 V
Reg.I
1
−7 200 mV
Reg.I
2
−4 100 mV
R.R. 55 64 −dB
Reg.L
1
−21 200 mV I
O
=5mA∼1A
Reg.L
2
−890mVI
O
=250∼750mA
T
CVO
−−0.5 −mV/˚C
V
n
−100 −µV f=10Hz∼100kHz
V
d
−2.0 −VI
O
=1A
I
b
−4.5 8.0 mA I
O
=0mA
I
b1
−−0.5 mA
I
b2
−−0.8 mA
I
O-P
−1.7 −AT
j
=25˚C
I
OS
−0.3 −AV
IN
=30V
V
IN
=12.5∼25V, I
O
=
5mA∼1A
V
IN
=12.5∼27V, I
O
=500mA
V
IN
=14∼20V, I
O
=500mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0∼125˚C
V
IN
=12.5∼27V
I
O
=5mA∼1A
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
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
Measurement
circuit
VO1 11.5 12.0 12.5 V IO=500mA
VO2 11.4 −12.6 V
Reg.I1−8 240 mV
Reg.I2−5 120 mV
R.R. 55 63 −dB
Reg.L1−23 240 mV IO=5mA∼1A
Reg.L2−10 120 mV IO=250∼750mA
TCVO −−
0.5
−mV/˚C
Vn−110 −µV f=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −AT
j=25˚C
IOS −0.3 −AVIN=30V
VIN=15∼27V, IO=5mA∼1A
VIN=14.5∼30V, IO=500mA
VIN=16∼22V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=14.5∼30V
IO=5mA∼1A
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
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
Measurement
circuit
VO1 14.4 15.0 15.6 V IO=500mA
VO2 14.25 −15.75 V
Reg.I1−9 300 mV
Reg.I2−5 150 mV
R.R. 54 62 −dB
Reg.L1−27 300 mV IO=5mA∼1A
Reg.L2−10 150 mV IO=250∼750mA
TCVO −−0.6 −mV/˚C
Vn−125 −µV f=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −AT
j=25˚C
IOS −0.3 −AV
IN
=30V
VIN=17.5∼30V, IO=5mA∼1A
VIN=17.5∼30V, IO=500mA
V
IN
=20∼26V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=17.5∼30V
IO=5mA∼1A
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
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
Measurement
circuit
VO1 17.3 18.0 18.7 V IO=500mA
VO2 17.1 −18.9 V
Reg.I1−10 360 mV
Reg.I2−5 180 mV
R.R. 55 61 −dB
Reg.L1−30 360 mV IO=5mA∼1A
Reg.L2−12 180 mV IO=250∼750mA
TCVO −−0.6 −mV/˚C
Vn−140 −µV f=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −AT
j=25˚C
IOS −0.3 −AVIN=30V
VIN=21∼33V, IO=5mA∼1A
VIN=21∼33V, IO=500mA
VIN=24∼33V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=21∼33V
IO=5mA∼1A
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
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
Measurement
circuit
VO1 19.2 20.0 20.8 V IO=500mA
VO2 19.0 −21.0 V
Reg.I1−12 400 mV
Reg.I2−7 200 mV
R.R. 53 60 −dB
Reg.L1−32 400 mV IO=5mA∼1A
Reg.L2−14 200 mV IO=250∼750mA
TCVO −−0.7 −mV/˚C
Vn−150 −µV f=10Hz∼100kHz
Vd−2.0 −VIO=1A
Ib−4.5 8.0 mA IO=0mA
Ib1 −−0.5 mA
Ib2 −−0.8 mA
IO-P −1.7 −AT
j=25˚C
IOS −0.3 −AVIN=30V
VIN=23∼33V, IO=5mA∼1A
VIN=23∼33V, IO=500mA
VIN=26∼32V, IO=500mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0∼125˚C
VIN=23∼33V
IO=5mA∼1A
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
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)
I
O-P
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
23.0 24.0 25.0 V I
O
=500mA
V
O2
22.8 −25.2 V
Reg.I
1
−15 480 mV
Reg.I
2
−10 240 mV
R.R. 50 58 −dB
Reg.L
1
−37 480 mV I
O
=5mA∼1A
Reg.L
2
−15 240 mV I
O
=250∼750mA
T
CVO
−−0.7 −mV/˚C
V
n
−180 −µV f=10Hz∼100kHz
V
d
−2.0 −VI
O
=1A
I
b
−4.7 8.0 mA I
O
=0mA
I
b1
−−0.5 mA
I
b2
−−0.8 mA
−1.7 −AT
j
=25˚C
I
OS
−0.3 −AV
IN
=30V
V
IN
=27∼33V, I
O
=5mA∼1A
V
IN
=27∼33V, I
O
=500mA
V
IN
=30∼33V, I
O
=500mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0∼125˚C
V
IN
=27∼33V
I
O
=5mA∼1A
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
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
"
""
"Measurement circuits
0.1µF
0.33µF
I
O
V
IN
V
OUTPUTINPUT
COMMON
Fig. 1 Measurement circuit for output voltage,
input stability,load regulation,
temperature coefficient of output voltage
0.1µF
0.33µF
100µF
V
IN
I
O
e
OUT
e
IN
10Ω5W
e
IN
=1Vrms
f=120Hz
Ripple rejection ratio R.R. = 20 log
e
IN
e
OUT
V
~
OUTPUTINPUT
COMMON
V
~
Fig. 2 Measurement circuit for ripple rejection rario
()
OUTPUTINPUT
COMMON
0.1
0.33µF
I
O
V
IN
Noise
meter
BPF
10Hz∼
100kHz
10µF
+
µF
Fig. 3 Measurement circuit for output noise voltage
V
OUTPUTINPUT
COMMON
0.1µF
0.33µF
I
O
IA
V
IN
V
∆V=
100mA
Fig. 4
Measurement
circuit for Minimum
I / O voltage differential
IO
OUTPUTINPUT
COMMON
0.1
0.33
VIN
A
µF
µF
Fig. 5 Measurement circuit for bias
current and bias current change
A
OUTPUTINPUT
COMMON
0.1
0.33
IO
VIN
µFµF
Fig. 6 Measurement circuit for
Fig. 1 output short-circuit current
"
""
"Electrical characteristic curves
OUTPUT VOLTAGE : V
OUT
(V)
OUTPUT CURRENT : I
OUT
(A)
V
IN
=10V
BA17805T
10
8
6
4
2
0
1.0 1.2 1.4 1.6 1.8 2.0
Fig. 7 Current limit characteristics
OUTPUT VOLTAGE : V
OUT
(V)
JUNCTION TEMPERATURE : Tj (˚C)
6
5
4
3
2
1
025 50 75 100 125 150 175 200
V
IN
=10V, I
OUT
=0
BA17805T
Fig. 8 Thermal cutoff circuit
Fig. 2 characteristics
25
20
15
10
5
0 25 50 75 100 125 150
(1) Infinite heat sink, θj-c = 5.7 (˚C/W)
(2) 100×100×2 (mm
3
), with Al heat sink
(3) 50×50×2 (mm
3
), with Al heat sink
(4) No heat sink θj-a = 62.5 (˚C/W)
POWER DISSIPATION : Pd (W)
(3) 6.5
(4) 2.0
AMBIENT TEMPERATURE : Ta (˚C)
(1) 22.0
(2) 11.0
Fig.9 Ta - power dissipation
characteristics (TO220)
Note: With Al heat sink, tightening
torque = 6 kg/cm and silicon
grease as lubricant
BA178!!T / FP series
Regulator ICs
0 25 50 75 100 125 150
2.5
5
7.5
10
12.5
0
AMBIENT TEMPERATURE : Ta (˚C)
POWER DISSIPATION : Pd (W)
(1) 10.0
(2) 1.0
Fig.10 Ta - power dissipation
Fig.3 characteristics (TO252-3)
(1) Infinite heat sink, θj-c = 12.5 (˚C/W)
(2) No heat sink θj-c = 125.0 (˚C/W)
"
""
"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 (VIN 0.1µF 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, 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.
BA178!!T / FP series
Regulator ICs
"
""
"External dimensions (Units : mm)
2.54±0.5 2.54±0.5 2.6±0.5
1.3
0.8
1.8±0.2
8.0±0.2
5.0±0.2
12.0±0.2
13.5Min.
BA178OOFP series
TO252-3TO220FP
(1) INPUT
(2) COMMON
(3) OUTPUT
BA178OOT series
φ3.1±0.1
(1) (2) (3)
(1) (3)
(1) (2) (3)
(1) INPUT
(2) COMMON
(3) OUTPUT
10.0
+0.3
−0.1
7.0
+0.3
−0.1
4.5
+0.3
−0.1
2.8
+0.2
−0.1
0.55
+0.1
−0.05
17.0
+0.4
−0.2
7.0±0.3
6.5
±
0.2
(2)
0.8
0.65 0.65
2.3
±
0.2 2.3
±
0.2 0.5
±
0.1
1.5
2.5
9.5±0.5
2.3
±
0.2 0.5
±
0.1
5.0
−0.1
+0.2
5.5±0.2
