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ROHM Semiconductor |
Regulator ICs
BA178!!T / FP series
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
5 BA17805T / FP 12 BA17812T / FP
6 BA17806T / FP 15 BA17815T / FP
7 BA17807T / FP 18 BA17818T / FP
8 BA17808T / FP 20 BA17820T / FP
9 BA17809T / FP 24 BA17824T / FP
10
BA17810T / FP
−
−
Regulator ICs
BA178!!T / FP series
"Internal circuit configuration diagram
R4 R10
Q12
R8
Q8
R9
Q9
R13
D2
R5
R6
D1
R7
Q15
Q13 Q10
Q6
Q5
R15
R1
Q18
Q14 Q1
R2
Q7
Q2
R22 R18
R16
C1
Q4
Q3
R14
R3
D3
Q11
Q16
R21
R17
R12
R20
R19
(1)
INPUT
Q17
R11 (3)
OUTPUT
(2)
COMMON
"Absolute maximum ratings (Ta=25°C)
^Common specifications for BA178!!T / FP seriesp
Parameter
Symbol
Limits
Unit
Applied voltage
Power
dissipation
TO220FP
TO252-3
VIN
Pd
35
2.0 ∗
1.0 ∗
V
W
Operating temperature
Topr
−40∼+85
˚C
Storage temperature
Tstg
−55∼+150
˚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).
"Recommended operating conditions (Ta=25°C)
BA17805T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage VIN 7.5 − 25 V
Output current IO
−−1A
BA17807T / FP
Parameter Symbol Min. Typ. Max. Unit
Input voltage
VIN
9.5
−
22
V
Output current IO
−−1A
BA17806T / FP
Parameter Symbol
Input voltage VIN
Output current IO
Min.
8.5
−
Typ.
−
−
Max.
21
1
Unit
V
A
BA17808T / FP
Parameter Symbol
Input voltage
VIN
Output current IO
Min.
10.5
−
Typ.
−
−
Max.
23
1
Unit
V
A
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