Date: 7/25/06 Rev G SP086 .5A Low Dropout Linear Regulator
2006 Sipex Corporation
general Description
The S
P1086 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 exter
nal
resistors.
The SP1086 series is available in standard packages of TO-263-3, TO-220, and TO-252.
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)
A
vailable in RoHS Compliant, Lead Free
Packaging
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
Figure . Package Types of SP086
TO-220
TO-252
TO-263-3
TO-220
INPUT
OUTPUT
ADJ/GND
1
2
3
SP1086
Solved by
TM
1.5A Low Dropout Linear Regulator
2
Date: 7/25/06 Rev G SP086 .5A Low Dropout Linear Regulator
2006 Sipex Corporation
Pin configuration
V Package
(TO-220)
V
1 Package
(TO-263-3)
OUTPUT
ADJ/GND
INPUT
INPUT
OUTPUT
ADJ/GND
1
2
3
1
2
3
V
2 Package
(TO-252)
1
2
3
ADJ/GND
OUTPUT
INPUT
Figure 2. Pin Configuration of SP086 (Top View)
Functional Block Diagram
Figure . Functional Block Diagram of S
P086
Thermal
Protection
+
-
For Adjustable Output, disconnect A and A2, connect B
INPUT
OUTPUT
ADJ/
GND
A
A2
B
For Fixed Output, connect A and A2, disconnect B
2
Date: 7/25/06 Rev G SP086 .5A Low Dropout Linear Regulator
2006 Sipex Corporation
(Typical and limits apply for T
J
=25
o
C unless otherwise noted.)
Parameter
Test
Circuit Symbol
Conditions
Min
Typ
Max
Unit
Reference Voltage
0.5%
4
V
REF
V
KA
=V
REF,
I
KA
=10mA
1.234 1.240
1.246
V
1%
1.228 1.240
1.252
Deviation of Reference Voltage
Over-Temperature
4
V
REF
V
KA
=V
REF
I
KA
=10mA
0
o
C to 70
o
C
2
10
mV
-40
o
C to 85
o
C
3
10
Ratio of Change in V
REF
to the
Change in Cathode Voltage
5
V
REF
V
KA
I
KA
=10mA,
V
KA
:V
REF
to 16V
-0.5
-1.5
mV/V
Reference Input Current
5
I
REF
I
KA
=10mA, R1=10K , R2=
0.15
0.4
A
Deviation of Reference Current
Over Full Temperature Range
5
I
REF
I
KA
=10mA, R1=10K , R2=
T
A
=-40 to 85
o
C
0.1
0.4
A
Minimum Cathode Current for
Regulation
4
I
KA
(MIN)
V
KA
=V
REF
55
80
A
Off-State Cathode Current
6
I
KA
(OFF)
V
REF
=0, V
KA
=18V
0.04
0.10
A
V
KA
=6, V
REF
=0
0.01
0.05
Dynamic Impedance
4
Z
KA
V
KA
=V
REF
, I
KA
=1 to 100mA
f 1.0kHz
0.05
0.15
electrical characteristics
Date: 7/25/06 Rev G SP086 .5A Low Dropout Linear Regulator
2006 Sipex Corporation
1.5A LOW DROPOUT LINEAR REGULATOR
electrical characteristics
Parameter
Symbol Conditions
Min
Typ
Max Unit
Reference Voltage
V
REF
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
1.238
1.225
1.250
1.250
1.262
1.270
V
Output Voltage
V
OUT
SP1086-1.5,
I
OUT
=10mA, V
IN
= 3.5V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 3V V
IN
10V
1.485
1.47
1.5
1.5
1.515
1.53
V
SP1086-1.8,
I
OUT
= 10mA, V
IN
= 3.8V, T
J
= 25
o
C,
10mA I
OUT
5A, 3.2V V
IN
10V
1.782
1.746
1.8
1.8
1.818
1.854
V
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
2.475
2.45
2.5
2.5
2.525
2.55
V
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
2.97
2.94
3.0
3.0
3.03
3.06
V
SP1086-3.3,
I
OUT
= 10mA, V
IN
= 5V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 4.75V V
IN
10V
3.267
3.235
3.3
3.3
3.333
3.365
V
SP1086-5.0,
I
OUT
= 10mA, V
IN
= 7V, T
J
= 25
o
C,
10mA I
OUT
1.5A, 6.5V V
IN
10V
4.95
4.9
5
5
5.05
5.1
V
Line Regulation
V
OUT
SP1086-ADJ, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.015
0.035
0.2
0.2
%
SP1086-1.5, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.3
0.6
6
6
mV
SP1086-1.8, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.3
0.6
6
6
mV
SP1086-2.5, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.3
0.6
6
6
mV
SP1086-3.0, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.3
0.6
6
6
mV
SP1086-3.3, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.5
1
10
10
mV
SP1086-5.0, I
OUT
= 10mA,
1.5V V
IN
- V
OUT
10V
0.5
1
10
10
mV
the entire junction temperature range for operation, 0
o
C to 125
o
C. (P
D
maximum power dissipation, see Note 2.)
Typicals and limits appearing in normal type apply for T
J
= 25
o
C. Limits appearing in Boldface type apply over
5
Date: 7/25/06 Rev G SP086 .5A Low Dropout Linear Regulator
2006 Sipex Corporation
electrical characteristics (continued)
Parameter
Symbol Conditions
Min
Typ
Max
Unit
Load Regulation
V
OUT
SP1086-ADJ, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
0.1
0.2
0.3
0.4
%
SP1086-1.5, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
3
6
12
20
mV
SP1086-1.8, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
3
6
12
20
mV
SP1086-2.5, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
3
6
12
20
mV
SP1086-3.0, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
3
7
15
20
mV
SP1086-3.3, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
3
7
15
20
mV
SP1086-5.0, 10mA I
OUT
1.5A,
V
IN
- V
OUT
= 2V
5
10
20
35
mV
Dropout Voltage
I
O
= 1.5A, V
REF
= 1%
1.3
1.5
V
Current Limit
I
LIMIT
V
IN
- V
OUT
= 2V,
1.5
2.3
A
Minimum
Load Current
1.4V V
IN
- V
OUT
10V (For ADJ)
2
5
mA
Quiescent Current
V
IN
= V
OUT
+ 1.3V
5
10
mA
Ripple Rejection
f
RIPPLE
= 120Hz, C
OUT
= 25 F Tantalum,
I
OUT
= 1.5A, V
IN
- V
OUT
= 3V
60
75
dB
Adjust Pin Current
60
120
A
Adjust Pin Current
Change
10mA I
OUT
5A,
1.4V V
IN
-V
OUT
10V
0.2
5
A
Temperature
Stability
0.5
%
RMS Noise
(% of V
OUT
)
T
A
= 25
o
C, 10Hz f 10kHz
0.003
%
Thermal Shutdown
Junction Temperature
165
o
C
Thermal Shutdown
Hysteresis
30
o
C
Thermal Resistance
Junction-to-Case
JC
TO - 252
TO - 263
TO - 220
4
4
4
o
C/W
Note 2: Maximum power dissipation see Figure 5.
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