The GS1086 is a low dropout three terminal regulator with
1.5A output current capability. The output voltage is
adjustable with the use of a resistor divider. For fixed out-
put voltage versions, the output voltage is internally set at
2.5V, 2.85V, 3.3V or 5V. Dropout is guaranteed at a maxi-
mum of 1.5V at maximum output current. Its low dropout
voltage and fast transient response make it ideal for low
voltage microprocessor applications. Internal current and
thermal limiting provides protection against any overload
condition that would create excessive junction temperatures.
Features
• Dropout Voltage 1.3V at 1.5A Output Current
• Fast Transient Response
• Line Regulation typically at 0.015%
• Load Regulation typically at 0.1%
• Internal thermal and current limiting
• Adjustable Output Voltage or Fixed 2.5V, 2.85V,
3.3V, 5V
• Standard 3-Pin Power Packages
Functional Block Diagram
Applications
• Post Regulator for Switching Supply
• Battery Chargers
• Constant-Current Regulators
• PC Add-On Card
Mechanical Data
V
IN
Current
Amp
Case:
TO-220AB, TO-263AB (D
2
PAK),
TO-252 (DPAK) and SOT-223
High temperature soldering guaranteed:
260°C/10 seconds at terminals
V
REF
1.25V
55µA
+
+
GM
--
Thermal
Limit
Current
Limit
V
OUT
Case outlines are on the back page
For
fixed
voltage
device
ADJ
GND
Document Number 74801
12-Mar-02
www.vishay.com
1
GS1086
Vishay Semiconductors
formerly General Semiconductor
Maximum Ratings and Thermal Characteristics
Parameter
Vin Pin to ADJ/GND Pin
Thermal Resistance – Junction to Case
TO-220AB
TO-252
TO-263AB
SOT-223
Operating Junction Temperature Range
Storage Temperature Range
(T
A
= 25°C unless otherwise noted)
Symbol
Vin
Value
7
3.0
8.0
3.0
15.0
0 to +125
–65 to 150
Unit
V
R
θJC
°C/W
T
J
T
stg
(2)
°C
°C
Electrical Characteristics
(1)
Parameter
T
J
= 25°C
, V
IN
= 5V, I
o
= 10mA unless otherwise noted.
Symbol
Test Conditions
T
J
= 25°C
0°C
≤
T
J
≤
125°C
2.65V
≤
V
IN
≤
7V
10mA
≤
I
o
≤
1.5A
GS1086-2.5
V
IN
= 5V
GS1086-2.85 V
IN
= 5V
GS1086-3.3
V
IN
= 5V
GS1086-5
V
IN
= 7V
GS1086
0°C
≤
T
J
≤
125°C
2.65V
≤
V
IN
≤
7V
10mA
≤
I
o
≤
1.5A
2.65V
≤
V
IN
≤
7V
T
J
= 25°C
0°C
≤
T
J
≤
125°C
10mA
≤
I
o
≤
1.5A
T
J
= 25°C
0°C
≤
T
J
≤
125°C
0°C
≤
T
J
≤
125°C
I
o
= 1.5A
I
o
= 1.0A
I
o
= 500mA
0°C
≤
T
J
≤
125°C
2.65
≤
Vin
≤
7V
10mA
≤
I
o
≤
1.5A
0°C
≤
T
J
≤
125°C
2.65
≤
Vin
≤
7V
10mA
≤
I
o
≤
1.5A
0°C
≤
T
J
≤
125°C
I
o
= 0.5A
0°C
≤
T
J
≤
125°C
0°C
≤
T
J
≤
125°C
Min
1.238
1.225
Typ
1.250
1.250
Max
1.262
1.275
Unit
Reference Voltage
V
REF
V
Output Voltage
V
OUT
2.47
2.82
3.26
4.95
0.98V
N
2.5
2.85
3.30
5.00
V
N
2.53
2.88
3.33
5.05
1.02V
N
V
Line Regulation
REG
line
0.015
0.02
0.1
0.2
1.3
1.25
1.2
1.5
2.0
55
0.2
0.2
0.3
0.4
1.5
1.45
1.4
% V
O
Load Regulation
REG
load
% V
O
Dropout Voltage
V
DROP
V
Output Current
Adjust Pin Current
I
o
I
adj
A
120
µA
Adjust Pin Current Change
∆I
adj
0.2
5
µA
Temperature Stability
Minimum Load Current
Adjustable Version
T
S
I
LMIN
0.8
3
10
%V
O
mA
www.vishay.com
2
Document Number 74801
12-Mar-02
GS1086
Vishay Semiconductors
formerly General Semiconductor
Electrical Characteristics
(1)
(con’t.)
Parameter
Quiescent Current
Fixed Voltage Version
RMS Output Noise
Ripple Rejection Ratio
Thermal Regulation
Long Term Stability
I
Q
N
RR
R
TH
T
J
= 25°C
(2)
, V
IN
= 5V, I
o
= 10mA unless otherwise noted.
Symbol
Test Conditions
0°C
≤
T
J
≤
125°C
10H
Z
≤
f
≤
10 kH
Z
f = 120 H
Z
, C
O
= 25µF
C
adj
= 25µF
T
A
= 25°C, 30ms Pulse
T
A
= 125°C, 1000 Hrs
Min
Typ
10
0.003
Max
14
Unit
mA
%V
O
dB
60
68
0.02
0.3
0.05
%/W
%V
O
Notes:
(1) All parameters, except nominal output voltage are specified for the variable voltage version, allowing a wider V
in
Range.
The specified limits also apply for the fixed voltage versions over the allowable input voltage range: GS1086-2.5 (3.9V - 7.0V), GS1086-2.85 (4.25V - 7.0V),
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