Solved by
SP1086
TM
1.5A Low Dropout Linear Regulator
Features
Low Dropout Voltage: Typical 1.3V at 1.5A
Current Limiting and Thermal Protection
Output Current: 1.5A
Current Limit: 2.3A
Operating Junction Temperature: 0 to 125
o
C
Line Regulation: 0.015% (Typical)
Load Regulation: 0.1% (Typical)
Available
in RoHS Compliant, Lead Free
Packaging
TO-220
3
2
1
INPUT
OUTPUT
ADJ/GND
Applications
High Efficiency Linear Regulators
Battery Charger
Post Regulation for Switching Supply
Microprocessor Supply
Motherboard Power Supply
Cable and ADSL Modem
DVD-Video Player
Telecom Equipment
Set Top Boxes and Web Boxes Modules' Supply
general Description
The SP1086 is a series of low dropout positive voltage regulators with a maximum dropout of 1.5V at 1.5A of load
current. The series features on-chip thermal shutdown. It also includes a bandgap reference and a current limiting
circuit. The SP1086 is available in 1.5V, 1.8V, 2.5V, 3V, 3.3V, and 5.0V versions. The fixed versions integrate the
adjust resistors. It is also available in an adjustable version, which can set the output voltage with only two external
resistors. The SP1086 series is available in standard packages of TO-263-3, TO-220
,
and TO-252.
TO-263-3
TO-220
TO-252
Figure . Package Types of SP086
Date: 7/25/06 Rev G
SP086 .5A Low Dropout Linear Regulator
© 2006 Sipex Corporation
Pin configuration
V Package
(TO-220)
3
2
1
INPUT
OUTPUT
ADJ/GND
V1 Package
(TO-263-3)
3
2
1
INPUT
OUTPUT
ADJ/GND
V2 Package
(TO-252)
3
2
INPUT
OUTPUT
ADJ/GND
1
Figure 2. Pin Configuration of SP086 (Top View)
Functional Block Diagram
INPUT
Thermal
Protection
-
+
2
OUTPUT
A
B
A2
For Adjustable Output, disconnect A and A2, connect B
For Fixed Output, connect A and A2, disconnect B
ADJ/
GND
Figure . Functional Block Diagram of SP086
Date: 7/25/06 Rev G
SP086 .5A Low Dropout Linear Regulator
© 2006 Sipex Corporation
2
electrical characteristics
(Typical and limits apply for T
J
=25
o
C unless otherwise noted.)
Parameter
Reference Voltage
0.5%
1%
Test
Symbol
Circuit
4
4
Conditions
Min
1.234
1.228
o
Typ
1.240
1.240
2
3
-0.5
Max
1.246
1.252
10
10
-1.5
Unit
V
mV
mV/V
A
A
A
A
V
REF
V
KA
=V
REF,
I
KA
=10mA
V
REF
V
KA
=V
REF
I
KA
=10mA
0
o
C to 70
o
C
-40 C to 85 C
o
Deviation of Reference Voltage
Over-Temperature
Ratio of Change in V
REF
to the
Change in Cathode Voltage
Reference Input Current
Deviation of Reference Current
Over Full Temperature Range
Minimum Cathode Current for
Regulation
Off-State Cathode Current
Dynamic Impedance
5
5
5
4
6
4
V
REF
I
KA
=10mA,
V
KA
V
KA
:V
REF
to 16V
I
REF
I
REF
I
KA
=10mA, R1=10K , R2=
I
KA
=10mA, R1=10K , R2=
T
A
=-40 to 85
o
C
0.15
0.1
55
0.04
0.01
0.05
0.4
0.4
80
0.10
0.05
0.15
I
KA
V
KA
=V
REF
(MIN)
I
KA
V
REF
=0, V
KA
=18V
(OFF) V
KA
=6, V
REF
=0
Z
KA
V
KA
=V
REF
, I
KA
=1 to 100mA
f 1.0kHz
Date: 7/25/06 Rev G
SP086 .5A Low Dropout Linear Regulator
© 2006 Sipex Corporation
1.5A LOW DROPOUT LINEAR REGULATOR
electrical characteristics
Parameter
Reference Voltage
Symbol
V
REF
Typicals and limits appearing in normal type apply for T
J
= 25
o
C. Limits appearing in
Boldface
type apply over
the entire junction temperature range for operation, 0
o
C to 125
o
C. (P
D
maximum power dissipation, see Note 2.)
Conditions
SP1086-ADJ,
I
OUT
= 10mA, V
IN
-V
OUT
= 2V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 1.4V V
IN
- V
OUT
6V
SP1086-1.5,
I
OUT
=10mA, V
IN
= 3.5V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 3V V
IN
10V
SP1086-1.8,
I
OUT
= 10mA, V
IN
= 3.8V, T
J
= 25
o
C,
10mA I
OUT
5A, 3.2V V
IN
10V
Output Voltage
V
OUT
SP1086-2.5,
I
OUT
= 10mA, V
IN
= 4.5V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 3.9V V
IN
10V
SP1086-3.0,
I
OUT
= 10mA, V
IN
= 4.5V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 4.9V V
IN
10V
SP1086-3.3,
I
OUT
= 10mA, V
IN
= 5V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 4.75V V
IN
10V
SP1086-5.0,
I
OUT
= 10mA, V
IN
= 7V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 6.5V V
IN
10V
SP1086-ADJ,
SP1086-1.5,
SP1086-1.8,
SP1086-2.5,
SP1086-3.0,
SP1086-3.3,
SP1086-5.0,
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
10V
10V
Min
1.238
1.225
1.485
1.47
1.782
1.746
2.475
2.45
2.97
2.94
3.267
3.235
4.95
4.9
Typ
1.250
1.250
1.5
1.5
1.8
1.8
2.5
2.5
3.0
3.0
3.3
3.3
5
5
0.015
0.035
0.3
0.6
0.3
0.6
0.3
0.6
0.3
0.6
0.5
1
0.5
1
Max
1.262
1.270
1.515
1.53
1.818
1.854
2.525
2.55
3.03
3.06
3.333
3.365
5.05
5.1
0.2
0.2
6
6
6
6
6
6
6
6
10
10
10
10
Unit
V
V
V
V
V
V
V
%
mV
mV
mV
mV
mV
mV
Line Regulation
V
OUT
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
10V
Date: 7/25/06 Rev G
SP086 .5A Low Dropout Linear Regulator
© 2006 Sipex Corporation
electrical characteristics (continued)
Parameter
Symbol
Conditions
SP1086-ADJ,
SP1086-1.5,
SP1086-1.8,
SP1086-2.5,
SP1086-3.0,
SP1086-3.3,
SP1086-5.0,
Dropout Voltage
Current Limit
Minimum
Load Current
Quiescent Current
Ripple Rejection
Adjust Pin Current
Adjust Pin Current
Change
Temperature
Stability
RMS Noise
(% of V
OUT
)
Thermal Shutdown
Thermal Shutdown
Hysteresis
Thermal Resistance
Junction-to-Case
JC
Min
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
Typ
0.1
0.2
3
6
3
6
3
6
3
7
3
7
5
10
1.3
Max
0.3
0.4
12
20
12
20
12
20
15
20
15
20
20
35
1.5
Unit
%
mV
mV
mV
mV
mV
mV
V
A
mA
mA
dB
Load Regulation
V
OUT
I
O
= 1.5A, V
REF
= 1%
I
LIMIT
V
IN
- V
OUT
= 2V,
1.4V
V
IN
- V
OUT
10V (For ADJ)
1.5
2.3
2
5
5
10
V
IN
= V
OUT
+ 1.3V
f
RIPPLE
= 120Hz, C
OUT
= 25 F Tantalum,
I
OUT
= 1.5A, V
IN
- V
OUT
= 3V
60
75
60
120
5
A
A
%
%
o
o
o
10mA I
OUT
5A,
1.4V V
IN
-V
OUT
10V
0.2
0.5
T
A
= 25
o
C, 10Hz
f
10kHz
0.003
165
30
Junction Temperature
C
C
TO - 252
TO - 263
TO - 220
4
4
4
C/W
Note 2: Maximum power dissipation see Figure 5.
Date: 7/25/06 Rev G
SP086 .5A Low Dropout Linear Regulator
© 2006 Sipex Corporation
5
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