Low drop adjustable
positive voltage regulator
BA1117FP
●Features
Low dropout voltage:
- 1.2 V typ. (at I
O
= 1 A, 25℃)
Output current up to 1 A
Adjustable version availability (V
REF
= 1.25 V)
Internal current and thermal limit
Available in
±1%
(at 25℃) and 2% in full
temperature range
High supply voltage rejection:
- 75 dB typ. (at 25℃)
Temperature range: -20℃ to 105℃
Designed to use by ceramic capacitors
TO252-3
TO220-3
●Typical
Application
V
IN
10uF
●Description
The BA1117FP is a low drop voltage regulator
able to provide up to 1 A of output current,
available in adjustable versions (V
REF
=1.25V).
The device is supplied in: TO252-3 and TO220-3.
Surface mounted packages optimize the
thermal characteristics while offering a relevant
space saving advantage. High efficiency is
assured by NPN pass transistor. Only a very
common 22uF minimum capacitor is needed for
stability. Chip trimming allows the regulator to
reach a very tight reference voltage tolerance, within
±1%
at 25℃.
V
OUT
V
REF
ADJ
I
ADJ
R1
22uF
R2
V
REF
= 1.25 V (Typ.)
I
ADJ
= 60 uA (Typ.)
V
O
= V
REF
×
(1 + R
2
/ R
1
) + I
ADJ
×
R
2
Table1.
Device summary
Order codes
TO220-3
Under development
Output voltage
Adjustable from 1.25 V
TO252-3
BA1117FP-E2
○Product
structure：Silicon monolithic integrated circuit
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© 2013 ROHM Co., Ltd. All rights reserved.
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○This
product is not designed protection against radioactive rays.
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BA1117FP
Datasheet
●Diagram
Figure 1.
Block diagram
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BA1117FP
Datasheet
●Pin
configuration
Figure 2.
Pin connections (top view)
3
2
1
1
2
3
V
IN
V
OUT
ADJ
ADJ V
OUT
V
IN
TO252-3
TO220-3
Note1:
The TAB is connected to the V
OUT
.
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BA1117FP
Datasheet
●Maximum
ratings
Table 2.
V
IN
P
D
T
STG
T
OP
Absolute maximum ratings
Parameter
DC input voltage
Power dissipation
Storage temperature range
Operating junction temperature range
Value
15
1.2
(Note3)
Symbol
Unit
V
W
℃
℃
-55 to +150
-20 to +105
Note2:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied. Beyond the above suggested
max. power dissipation, a short-circuit may permanently damage the device.
In case Ta
≧
25
℃
(70mm
×
70mm
×
1.6mm when mounted on a glass epoxy board) is reduced by 9.6mW/
℃
.
Note3:
Table 3.
Thermal data
Parameter
Thermal resistance junction-ambient
TO252-3
104.2
TO220-3
67.5
Unit
℃/W
Symbol
R
thJA
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BA1117FP
Datasheet
●Electrical
characteristics
Refer to the test circuits, T
J
= -20 to 105℃, C
O
= 22 uF, C
I
= 10 uF, unless otherwise specified.
Table 4.
Symbol
V
O
V
O
⊿V
O
⊿V
O
⊿V
O
⊿V
O
V
I
I
ADJ
⊿I
ADJ
I
O(min)
I
O
eN
SVR
Electrical characteristics of BA1117 (Adjustable)
Parameter
Reference Voltage
Reference Voltage
Line regulation
Load regulation
Temperature stability
Long term stability
Operating input voltage
Adjustment Pin Current
Adjustment Pin Current
Change
Minimum Load Current
Output current
Output noise voltage
Supply voltage
rejection
1000hrs, T
J
= 105℃
I
O
= 100mA
V
I
≦
10 V
V
I
- V
O
=1.4
V
I
= 10 V
V
I
- V
O
= 5 V, T
J
= 25℃
B = 10 Hz to 10 kHz, T
J
= 25℃
I
O
= 40mA, f = 120 Hz
V
I
– V
O
= 3 V, V
ripple
= 1 V
PP
,
I
O
= 100 mA
60
1000
to 10 V, I
O
= 10 mA to 1 A
60
0.2
1.7
1700
100
75
1
1.05
1.20
0.08
1.10
1.15
1.40
0.2
Test conditions
V
I
= 5.3 V, I
O
= 10 mA, T
J
= 25℃
I
O
= 10 mA to 1 A, V
I
= 2.75 to 10 V
V
I
= 2.75 V to 8 V, I
O
= 0 mA
V
I
= 2.75 V, I
O
= 0 to 1A
Min.
1.238
1.225
1
1
0.5
0.3
10
120
5
5
Typ.
1.250
Max.
1.262
1.27
6
10
Unit
V
V
mV
mV
%
%
V
uA
uA
mA
mA
uV
dB
V
V
V
%/W
V
D
Dropout voltage
I
O
= 500 mA
I
O
= 1 A
⊿V
O(pwr)
Thermal regulation
T
a
= 25℃, 30 ms pulse
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