BA178M{{T / FP Series
Regulato r ICs
Standard 78M series, 3-pi n regulator
BA178M{{
{{{{
{{T / FP Ser ies
The BA178M{{T and BA178M{{FP Se ri es are 3- pin, fi xed pos i ti ve outpu t volt age regul at ors . The se reg ula to rs are
used t o prov ide a stab ilize d output v oltag e from a flu ctuati ng DC inpu t volt age.
There are 1 1 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.
z
zz
zApplications
Constant voltage power supply
z
zz
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) Ric hly dive rse lin eup. (5V, 6V, 7V, 8V, 9V, 10V, 12V, 15V, 18V, 20V, 24 V)
z
zz
zProduct codes
Output voltage (V) Product No. Output voltage (V) Product No.
512
615
718
820
924
10 −−
BA178M05T / FP
BA178M09T / FP
BA178M10T / FP
BA178M12T / FP
BA178M15T / FP
BA178M18T / FP
BA178M20T / FP
BA178M24T / FP
BA178M06T / FP
BA178M07T / FP
BA178M08T / FP
BA178M{{T / FP Series
Regulato r ICs
z
zz
zInternal 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
10
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
z
zz
zAbsolute maximum ratings (Ta=25°C)
^Common specifications for BA178M{{T / FP seriesp
Parameter Symbol Limits Unit
Applied voltage VIN 35 V
Power dissipation W
Operating temperature Topr °C
Storage temperature Tstg °C
2.0
∗
1.0
∗
−40~+85
−55~+150
Pd
TO220FP
TO252−3
∗
Reduced by 16 mW (TO220FP) and 8 mW (TO252-3) for each increase in Ta of 1
°C
over 25
°C
(without heat sink).
z
zz
zRecommended operating conditions (Ta= 25°C)
BA178M05T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage 7.5 −
−
V
−0.5 AOutput current
20
V
IN
I
O
BA178M07T / FP
Parameter Symbol Min. Typ. Max. Unit
9.5 −22 V
−−0.5 A
V
IN
I
O
Input voltage
Output current
BA178M09T / FP
Parameter Symbol Min. Typ. Max. Unit
11.5 −V
−−0.5 A
24
V
IN
I
O
Input voltage
Output current
BA178M06T / FP
Parameter Symbol Min. Typ. Max. Unit
8.5 −21 V
−−0.5 A
V
IN
I
O
Input voltage
Output current
BA178M08T / FP
Parameter Symbol Min. Typ. Max. Unit
10.5 −23 V
−−0.5 A
V
IN
I
O
Input voltage
Output current
BA178M10T / FP
Parameter Symbol Min. Typ. Max. Unit
12.5 −25 V
−−0.5 A
VIN
IO
Input voltage
Output current
BA178M{{T / FP Series
Regulato r ICs
BA178M12T / FP
Parameter Symbol Min. Typ. Max. Unit
15 −27 V
−−0.5 A
VIN
IO
Input voltage
Output current
BA178M18T / FP
Parameter Symbol Min. Typ. Max. Unit
21 −33 V
−−0.5 A
VIN
IO
Input voltage
Output current
BA178M24T / FP
BA178M15T / FP
Parameter Symbol Min. Typ. Max. Unit
17.5 −30 V
−−0.5 A
V
IN
I
O
Input voltage
Output current
BA178M20T / FP
Parameter Symbol Min. Typ. Max. Unit
23 −33 V
−−0.5 A
VIN
IO
Input voltage
Output current
Parameter Symbol Min. Typ. Max. Unit
VIN 27 −33 V
IO−−0.5 A
Input voltage
Output current
z
zz
zElectrical characteristics
<BA178M05T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=10 V, 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 Fig.1
Input stability 1 Reg.I1−3 100 mV Fig.1
Input stability 2 Reg.I2−1 50 mV Fig.1
Ripple rejection ratio R.R. 62 78 −dB 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
Temperature coefficient of output voltage TCVO −−1.0 −Fig.1
Output noise voltage Vn−40 −µVf
=
10Hz
~
100kHz Fig.3
Minimum I/O voltage differential Vd−2.0 −VIO
=
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 Fig.5
Peak output current IO−P−875 −mA Tj
=
25
°C
Fig.1
Output short-circuit current IOS −0.4 −AVIN
=
25V Fig.6
VIN
=
7.5
~
20V, IO
=
5
~
350mA
VIN
=
7
~
25V, IO
=
200mA
VIN
=
8
~
12V, IO
=
200mA
eIN
=
1Vrms, f
=
120Hz, IO
=
100mA
IO
=
5mA, Tj
=
0
~
125
°C
VIN
=
8
~
25V, IO
=
200mA
mV/
°C
BA178M{{T / FP Series
Regulato r ICs
<BA178M06T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=11V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
5.75 6.0 6.25 V I
O
=350mA
V
O2
5.7 −6.3 V
Reg.I
1
−3 100 mV
Reg.I
2
−150mV
R.R. 60 74 −dB
Reg.L
1
−20 120 mV I
O
=5~500mA
Reg.L
2
−10 60 mV I
O
=5~200mA
T
CVO
−−0.5 −
V
n
−60 −µVf=10Hz~100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5~350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25°C
I
OS
−0.4 −AV
IN
=25V
V
IN
=8.5~21V, I
O
=5~350mA
V
IN
=8~25V, I
O
=200mA
V
IN
=9~25V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0~125°C
V
IN
=9~25V, I
O
=200mA
mV/°C
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
<BA178M07T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=13V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
6.7 7.0 7.3 V I
O
=350mA
V
O2
6.65 −7.35 V
Reg.I
1
−4 100 mV
Reg.I
2
−150mV
R.R. 57 71 −dB
Reg.L
1
−20 140 mV I
O
=5~500mA
Reg.L
2
−10 70 mV I
O
=5~200mA
T
CVO
−−0.5 −
V
n
−70 −µVf=10Hz~100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5~350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25°C
I
OS
−0.4 −AV
IN
=25V
V
IN
=9.5~22V, I
O
=5~350mA
V
IN
=9~25V, I
O
=200mA
V
IN
=10~25V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0~125°C
V
IN
=10~25V, I
O
=200mA
mV/°C
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
BA178M{{T / FP Series
Regulato r ICs
<BA178M08T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=14 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
7.7 8.0 8.3 V I
O
=350mA
V
O2
7.6 −8.4 V
Reg.I
1
−4 100 mV
Reg.I
2
−150mV
R.R. 56 69 −dB
Reg.L
1
−20 160 mV I
O
=5
~
500mA
Reg.L
2
−10 80 mV I
O
=5
~
200mA
T
CVO
−−0.5 −
V
n
−80 −µVf=10Hz
~
100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5
~
350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25
°C
I
OS
−0.4 −AV
IN
=25V
V
IN
=10.5
~
23V, I
O
=5
~
350mA
V
IN
=10.5
~
25V, I
O
=200mA
V
IN
=11
~
12V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0
~
125
°C
V
IN
=10.5
~
25V, I
O
=200mA
mV/
°C
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
<BA178M09T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=15 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
8.6 9.0 9.4 V I
O
=350mA
V
O2
8.55 −9.45 V
Reg.I
1
−4 100 mV
Reg.I
2
−250mV
R.R. 56 67 −dB
Reg.L
1
−20 180 mV I
O
=5
~
500mA
Reg.L
2
−10 90 mV I
O
=5
~
200mA
T
CVO
−−0.5 −
V
n
−90 −µVf=10Hz
~
100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5
~
350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25
°C
I
OS
−0.17 −AV
IN
=30V
V
IN
=11.5
~
24V, I
O
=5
~
350mA
V
IN
=11.5
~
26V, I
O
=200mA
V
IN
=12
~
25V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0
~
125
°C
V
IN
=12
~
25V, I
O
=200mA
mV/
°C
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
BA178M{{T / FP Series
Regulato r ICs
<BA178M10T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=16V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
9.6 10.0 10.4 V I
O
=350mA
V
O2
9.5 −10.5 V
Reg.I
1
−5 100 mV
Reg.I
2
−250mV
R.R. 56 66 −dB
Reg.L
1
−20 200 mV I
O
=5~500mA
Reg.L
2
−10 100 mV I
O
=5~200mA
T
CVO
−−0.5 −
V
n
−100 −µVf=10Hz~100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5~350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25°C
I
OS
−0.17 −AV
IN
=30V
V
IN
=12.5~25V, I
O
=5~350mA
V
IN
=12.5~28V, I
O
=200mA
V
IN
=14~26V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0~125°C
V
IN
=13~25V, I
O
=200mA
mV/°C
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
<BA178M12T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=19 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
11.5 12.0 12.5 V I
O
=350mA
V
O2
11.4 −12.6 V
Reg.I
1
−5 100 mV
Reg.I
2
−350mV
R.R. 55 63 −dB
Reg.L
1
−20 240 mV I
O
=5~500mA
Reg.L
2
−10 120 mV I
O
=5~200mA
T
CVO
−−0.5 −
V
n
−110 −µVf=10Hz~100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5~350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25°C
I
OS
−0.17 −AV
IN
=30V
V
IN
=15~27V, I
O
=5~350mA
V
IN
=14.5~30V, I
O
=200mA
V
IN
=16~30V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0~125°C
V
IN
=14.5~30V, I
O
=200mA
mV/°C
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
BA178M{{T / FP Series
Regulato r ICs
<BA178M15T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=23 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
14.4 15.0 15.6 V I
O
=350mA
V
O2
14.25 −15.75 V
Reg.I
1
−6 100 mV
Reg.I
2
−350mV
R.R. 54 60 −dB
Reg.L
1
−20 300 mV I
O
=5~500mA
Reg.L
2
−10 150 mV I
O
=5~200mA
T
CVO
−−0.6 −
V
n
−130 −µVf=10Hz~100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5~350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25°C
I
OS
−0.17 −AV
IN
=30V
V
IN
=17.5~30V, I
O
=5~350mA
V
IN
=17.5~30V, I
O
=200mA
V
IN
=20~30V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0~125°C
V
IN
=17.5~30V, I
O
=200mA
mV/°C
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
<BA178M18T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=27 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
VO1 17.3 18.0 18.7 V IO=350mA
VO2 17.1 −18.9 V
Reg.I1−7 100 mV
Reg.I2−350mV
R.R. 53 58 −dB
Reg.L1−20 360 mV IO=5
~
500mA
Reg.L2−10 180 mV IO=5
~
200mA
TCVO −−0.6 −
Vn−140 −µVf=10Hz
~
100kHz
Vd−2.0 −VIO=500mA
Ib−4.5 6.0 mA IO=0mA
Ib1 −−0.5 mA IO=5
~
350mA
Ib2 −−0.8 mA
IO−P−875 −mA Tj=25
°C
IOS −0.17 −AVIN=30V
VIN=21
~
33V, IO=5
~
350mA
VIN=21
~
33V, IO=200mA
VIN=24
~
33V, IO=200mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, Tj=0
~
125
°C
VIN=21
~
33V, IO=200mA
mV/
°C
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
BA178M{{T / FP Series
Regulato r ICs
<BA178M20T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=29 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
V
O1
19.2 20.0 20.8 V I
O
=350mA
V
O2
19.0 −21.0 V
Reg.I
1
−8 100 mV
Reg.I
2
−450mV
R.R. 53 58 −dB
Reg.L
1
−20 400 mV I
O
=5~500mA
Reg.L
2
−10 200 mV I
O
=5~200mA
T
CVO
−−0.7 −
V
n
−150 −µVf=10Hz~100kHz
V
d
−2.0 −VI
O
=500mA
I
b
−4.5 6.0 mA I
O
=0mA
I
b1
−−0.5 mA I
O
=5~350mA
I
b2
−−0.8 mA
I
O
−
P
−875 −mA T
j
=25°C
I
OS
−0.17 −AV
IN
=30V
V
IN
=23~33V, I
O
=5~350mA
V
IN
=23~33V, I
O
=200mA
V
IN
=24~33V, I
O
=200mA
e
IN
=1Vrms, f=120Hz, I
O
=100mA
I
O
=5mA, T
j
=0~125°C
V
IN
=23~33V, I
O
=200mA
mV/°C
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
Mninimum 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
<BA178M24T / FP individual specifications> (unless otherwise noted, Ta=25°C, VIN=33 V, IO=350mA)
Parameter Symbol Min. Typ. Max. Unit Conditions
Measurement
circuit
VO1 23.0 24.0 25.0 V IO=350mA
VO2 22.8 −25.2 V
Reg.I1−10 100 mV
Reg.I2−550mV
R.R. 50 55 −dB
Reg.L1−20 480 mV IO=5~500mA
Reg.L2−10 240 mV IO=5~200mA
TCVO −−0.7 −
Vn−170 −µVf=10Hz~100kHz
Vd−2.0 −VIO=500mA
Ib−4.8 6.0 mA IO=0mA
Ib1 −−0.5 mA IO=5~350mA
Ib2 −−0.8 mA
IO−P−875 −mA Tj=25°C
IOS −0.17 −AVIN=30V
VIN=27~33V, IO=5~350mA
VIN=27~33V, IO=200mA
VIN=28~33V, IO=200mA
eIN=1Vrms, f=120Hz, IO=100mA
IO=5mA, T
j
=0~125°C
VIN=27~33V, IO=200mA
mV/°C
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
BA178M{{T / FP Series
Regulato r ICs
z
zz
zMeasurement circuits
V
OUTPUTINPUT
COMMON
0.1µF
0.33µF
100µF
V
IN
V
I
O
e
OUT
10Ω5W
e
IN
=1Vrms
f=120Hz
Ripple rejection ratioR.R.=20 log e
IN
e
OUT
()
Fig. 2
Measurement
circuit for ripple rejection ratio
Fig. 3
Measurement
circuit for output noise voltage
OUTPUTINPUT
COMMON
0.1
0.33µF
I
O
V
IN
Noise
meter
BPF
10Hz
~
100kHz
10µF
+
µF
Fig. 4
Measuremen
t circuit for Minimum
I/O voltage differential
V
OUTPUTINPUT
COMMON
0.1µF0.33µF
I
O
V
IN
V
500mA
∆V=
100mV
Fig. 5
Measurement
circuit for bias current
and bias current change
I
O
V
0.1 µF0.33 µF
V
IN
A
OUTPUTINPUT
COMMON
Fig. 6
Measuremen
t circuit for
Fig. 10output short-circuit current
A
OUTPUT
INPUT
COMMON
0.1µF0.33µF
I
O
V
IN
V
OUTPUTINPUT
COMMON
0.1µF
0.33µF
I
O
V
IN
Fig. 1
Measurement
circuit for output voltage,
input stability, load regulation,
temperature coefficient of output voltage
z
zz
zElectrical characteristic curves
OUTPUT VOLTAGE : V
OUT
(V)
OUTPUT CURRENT : I
OUT
(A)
V
IN
=10V
BA178M05T
10
8
6
4
2
0 0.2 0.4 0.6 0.8 1.0
Fig. 7 Current limit characteristics
OUTPUT VOLTAGE : VOUT (V)
JUNCTION TEMPERATURE : Tj (°C)
6
5
4
3
2
1
025 50 75 100 125 150 175 200
BA178M05T
VIN=10V, IOUT=0
Fig. 8 Thermal cutoff circuit
characteristics
25
20
15
10
5
0 25 50 75 100 125 150
POWER DISSIPATION : Pd (W)
(3) 6.5
(4) 2.0
AMBIENT TEMPERATURE : Ta (°C)
(1) 22.0
(2) 11.0
Fig.9 Thermal derating characteristic
(TO220FP)
(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)
BA178M{{T / FP Series
Regulato r 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 Thermal derating characteristic
(TO252−3)
(1) Infinite heat sink, θj−c=12.5 (°C / W)
(2) No heat sink θj−c=125.0 (°C /W)
z
zz
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) Th ermal ov erloa d circui t
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
Regulato r ICs
z
zz
zExternal 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.
BA178MOOFP Series
TO252−3
TO220FP
(1) INPUT
(2) COMMON
(3) OUTPUT
BA178MOOT Series
φ3.1±0.1
(1) (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
213
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±0.20.5±0.1
5.0
−0.1
+0.2
5.5±0.2
(1) (2) (3)
(1) (2) (3)
