LM1086.pdf

(819 KB) Pobierz
LM1086 1.5A Low Dropout Positive Regulators
June 2005
LM1086
1.5A Low Dropout Positive Regulators
General Description
The LM1086 is a series of low dropout positive voltage
regulators with a maximum dropout of 1.5V at 1.5A of load
current. It has the same pin-out as National Semiconductor’s
industry standard LM317.
The LM1086 is available in an adjustable version, which can
set the output voltage with only two external resistors. It is
also available in six fixed voltages: 1.8V, 2.5V, 2.85V, 3.3V,
3.45V and 5.0V. The fixed versions integrate the adjust
resistors.
The LM1086 circuit includes a zener trimmed bandgap ref-
erence, current limiting and thermal shutdown.
The LM1086 series is available in TO-220, TO-263, and LLP
packages. Refer to the LM1084 for the 5A version, and the
LM1085 for the 3A version.
Features
n
Available in 1.8V, 2.5V, 2.85V, 3.3V, 3.45V, 5V and
Adjustable Versions
n
Current Limiting and Thermal Protection
n
Output Current
1.5A
n
Line Regulation
0.015% (typical)
n
Load Regulation
0.1% (typical)
Applications
n
n
n
n
n
n
SCSI-2 Active Terminator
High Efficiency Linear Regulators
Battery Charger
Post Regulation for Switching Supplies
Constant Current Regulator
Microprocessor Supply
Connection Diagrams
TO-220
TO-263
LLP
10094802
Top View
10094804
Top View
10094866
Pins 6, 7, and 8 must be tied together.
Top View
Basic Functional Diagram, Adjustable Version
Application Circuit
10094865
10094852
1.2V to 15V Adjustable Regulator
© 2005 National Semiconductor Corporation
DS100948
www.national.com
LM1086
Ordering Information
Package
3-lead TO-263
Temperature Range
−40˚C to +125˚C
Part Number
LM1086IS-ADJ
LM1086ISX-ADJ
LM1086IS-1.8
LM1086ISX-1.8
LM1086IS-2.85
LM1086ISX-2.85
LM1086IS-3.3
LM1086ISX-3.3
LM1086IS-3.45
LM1086ISX-3.45
LM1086IS-5.0
LM1086ISX-5.0
0˚C to +125˚C
LM1086CS-ADJ
LM1086CSX-ADJ
LM1086CS-2.5
LM1086CSX-2.5
LM1086CS-2.85
LM1086CSX-2.85
LM1086CS-3.3
LM1086CSX-3.3
LM1086CS-5.0
LM1086CSX-5.0
3-lead TO-220
−40˚C to +125˚C
LM1086IT-ADJ
LM1086IT-1.8
LM1086IT-2.85
LM1086IT-3.3
LM1086IT-5.0
0˚C to +125˚C
LM1086CT-ADJ
LM1086CT-2.85
LM1086CT-3.3
LM1086CT-5.0
8-Lead LLP
−40˚C to +125˚C
LM1086ILD-ADJ
LM1086ILDX-ADJ
LM1086ILD-1.8
LM1086ILDX-1.8
LM1086ILD-2.5
LM1086ILDX-2.5
LM1086ILD-2.85
LM1086ILDX-2.85
LM1086ILD-3.3
LM1086ILDX-3.3
LM1086ILD-5.0
LM1086ILDX-5.0
Transport Media
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Rails
Rails
Rails
Rails
Rails
Rails
Rails
Rails
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
Rails
Tape and Reel
LDC008AA
T03B
TS3B
NSC Drawing
www.national.com
2
LM1086
Simplified Schematic
10094834
3
www.national.com
LM1086
Absolute Maximum Ratings
(Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Maximum Input-to-Output Voltage Differential
LM1086-ADJ
LM1086-1.8
LM1086-2.5
LM1086-2.85
LM1086-3.3
LM1086-3.45
LM1086-5.0
Power Dissipation (Note 2)
Junction Temperature (T
J
)(Note 3)
29V
27V
27V
27V
27V
27V
25V
Internally Limited
150˚C
Storage Temperature Range
Lead Temperature
ESD Tolerance (Note 4)
-65˚C to 150˚C
260˚C, to 10 sec
2000V
Operating Ratings
(Note 1)
Junction Temperature Range (T
J
) (Note 3)
"C" Grade
Control Section
Output Section
"I" Grade
Control Section
Output Section
−40˚C to 125˚C
−40˚C to 150˚C
0˚C to 125˚C
0˚C to 150˚C
Electrical Characteristics
Typicals and limits appearing in normal type apply for T
J
= 25˚C. Limits appearing in
Boldface
type apply over the entire junc-
tion temperature range for operation.
Symbol
V
REF
Parameter
Reference Voltage
Conditions
LM1086-ADJ
I
OUT
= 10mA, V
IN
−V
OUT
= 3V
10mA
≤I
OUT
≤
I
FULL LOAD
,
1.5V
≤
V
IN
−V
OUT
≤
15V (Note 7)
LM1086-1.8
I
OUT
= 0mA, V
IN
= 5V
0
≤
I
OUT
≤
I
FULL LOAD
, 3.3V
≤
V
IN
≤
18V
LM1086-2.5
I
OUT
= 0mA, V
IN
= 5V
0
≤
I
OUT
≤
I
FULL LOAD
, 4.0V
≤
V
IN
≤
18V
LM1086-2.85
I
OUT
= 0mA, V
IN
= 5V
0
≤
I
OUT
≤
I
FULL LOAD
, 4.35V
≤
V
IN
≤
18V
LM1086-3.3
I
OUT
= 0mA, V
IN
= 5V
0
≤
I
OUT
≤
I
FULL LOAD
, 4.75V
≤
V
IN
≤
18V
LM1086-3.45
I
OUT
= 0mA, V
IN
= 5V
0
≤
I
OUT
≤
I
FULL LOAD
, 4.95V
≤
V
IN
≤
18V
LM1086-5.0
I
OUT
= 0mA, V
IN
= 8V
0
≤
I
OUT
≤
I
FULL LOAD
, 6.5V
≤
V
IN
≤
20V
∆V
OUT
Line Regulation
(Note 8)
LM1086-ADJ
I
OUT
=10mA, 1.5V≤ (V
IN
-V
OUT
)
≤
15V
LM1086-1.8
I
OUT
= 0mA, 3.3V
≤
V
IN
≤
18V
LM1086-2.5
I
OUT
= 0mA, 4.0V
≤
V
IN
≤
18V
Min
(Note 6)
1.238
1.225
Typ
(Note 5)
1.250
1.250
Max
(Note 6)
1.262
1.270
Units
V
V
V
OUT
Output Voltage
(Note 7)
1.782
1.764
2.475
2.450
2.82
2.79
3.267
3.235
3.415
3.381
4.950
4.900
1.8
1.8
2.50
2.50
2.85
2.85
3.300
3.300
3.45
3.45
5.000
5.000
0.015
0.035
0.3
0.6
0.3
0.6
1.818
1.836
2.525
2.55
2.88
2.91
3.333
3.365
3.484
3.519
5.050
5.100
0.2
0.2
6
6
6
6
V
V
V
V
V
V
V
V
V
V
%
%
mV
mV
www.national.com
4
LM1086
Electrical Characteristics
(Continued)
Typicals and limits appearing in normal type apply for T
J
= 25˚C. Limits appearing in
Boldface
type apply over the entire junc-
tion temperature range for operation.
Parameter
Conditions
LM1086-2.85
I
OUT
= 0mA, 4.35V
≤
V
IN
≤
18V
LM1086-3.3
I
OUT
= 0mA, 4.5V
≤
V
IN
≤
18V
LM1086-3.45
I
OUT
= 0mA, 4.95V
≤
V
IN
≤
18V
LM1086-5.0
I
OUT
= 0mA, 6.5V
≤
V
IN
≤
20V
Min
(Note 6)
Typ
(Note 5)
0.3
0.6
0.5
1.0
0.5
1.0
0.5
1.0
0.1
0.2
3
6
3
7
5
10
1.3
Max
(Note 6)
6
6
10
10
10
10
10
10
0.3
0.4
12
20
15
25
20
35
1.5
Units
mV
mV
mV
mV
mV
mV
mV
mV
%
%
mV
mV
mV
mV
mV
mV
V
Symbol
∆V
OUT
Load Regulation
(Note 8)
LM1086-ADJ
(V
IN
-V
OUT
) = 3V, 10mA
≤
I
OUT
≤
I
FULL
LM1086-1.8 ,2.5, 2.85
V
IN
= 5V, 0
≤
I
OUT
≤
I
FULL
LM1086-3.3, 3.45
V
IN
= 5V, 0
≤
I
OUT
≤
I
FULL
LM1086-5.0
V
IN
= 8V, 0
≤
I
OUT
≤
I
FULL
LOAD
LOAD
LOAD
LOAD
Dropout Voltage
(Note 9)
I
LIMIT
Current Limit
LM1086-ADJ, 1.8, 2.5,2.85, 3.3, 3.45, 5
∆V
REF
,
∆V
OUT
= 1%, I
OUT
= 1.5A
LM1086-ADJ
V
IN
−V
OUT
= 5V
V
IN
−V
OUT
= 25V
LM1086-1.8,2.5, 2.85, 3.3, 3.45, V
IN
= 8V
LM1086-5.0, V
IN
= 10V
1.50
0.05
1.5
1.5
2.7
0.15
2.7
2.7
5.0
5.0
5.0
5.0
5.0
0.008
10.0
10.0
10.0
10.0
10.0
0.04
A
A
A
A
mA
mA
mA
mA
mA
%/W
Minimum Load Current
(Note 10)
Quiescent Current
LM1086-ADJ
V
IN
−V
OUT
= 25V
LM1086-1.8, 2.5, 2.85, V
IN
≤
18V
LM1086-3.3, V
IN
≤
18V
LM1086-3.45, V
IN
≤
18V
LM1086-5.0, V
IN
≤
20V
Thermal Regulation
Ripple Rejection
T
A
= 25˚C, 30ms Pulse
f
RIPPLE
= 120Hz, C
OUT
= 25µF Tantalum,
I
OUT
= 1.5A
LM1086-ADJ, C
ADJ
= 25µF, (V
IN
−V
O
) = 3V
LM1086-1.8, 2.5, 2.85, V
IN
= 6V
LM1086-3.3, V
IN
= 6.3V
LM1086-3.45, V
IN
= 6.3V
LM1086-5.0 V
IN
= 8V
60
60
60
60
60
75
72
72
72
68
55
0.2
0.5
0.3
0.003
1.5/4.0
1.5/4.0
120
5
1.0
dB
dB
dB
dB
dB
µA
µA
%
%
%
˚C/W
˚C/W
Adjust Pin Current
Adjust Pin Current
Change
Temperature Stability
Long Term Stability
RMS Noise
(% of V
OUT
)
θ
JC
Thermal Resistance
Junction-to-Case
LM1086
10mA
≤
I
OUT
≤
I
FULL LOAD
,
1.5V
≤
(V
IN
−V
OUT
)
≤
15V
T
A
= 125˚C, 1000Hrs
10Hz
≤
f≤ 10kHz
3-Lead TO-263: Control Section/Output
Section
3-Lead TO-220: Control Section/Output
Section
5
www.national.com

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin