Austin Semiconductor, Inc.
LOW DROPOUT
REGULAT
REGULATOR
AS1185
ELECTRICAL CHARACTERISTICS:
The • denotes specifications which apply over the
operating temperature range, otherwise specifications are at T
A
= 25°C. Adjustable version,
V
IN
= 7.4V, V
OUT
= 5V, I
OUT
= 1mA, R
LIM
= 5.6k, unless otherwise noted.
PARAMETER
Reference Voltage (@ FB Pin)
CONDITION
V
IN
- V
OUT
= 5V, V
OUT
= V
REF
1mA < I
OUT
< 2.7A
V
IN
- V
OUT
= 1.2V to V
IN
= 30V
P < 25W
6
, V
OUT
= 5V
Feedback Pin Bias Current
Dropout Voltage
3
Load Regulation
7
Line Regulation
7
Minimum Input Voltage
T
MIN
< T
J
< T
MAX9
V
OUT
= V
REF
I
OUT
= 0.5A, V
OUT
= 5V
I
OUT
= 2.7A, V
OUT
= 5V
I
OUT
= 5mA to 2.7A
V
IN
- V
OUT
= 1.5V to 10V, V
OUT
= 5V
V
IN
- V
OUT
= 1V to 20V, V
OUT
= 5V
I
OUT
= 1A , V
OUT
= V
REF
I
OUT
= 2.7A
1.5V < V
IN
- V
OUT
< 10V
V
IN
- V
OUT
= 15V
V
IN
- V
OUT
= 20V
V
IN
- V
OUT
= 30V
5k < R
LIM
< 15k, V
OUT
= 1V
11
1A < I
LIM
< 2.7A
R
LIM
= 15k • A/I
LIM
I
OUT
= 5mA, V
OUT
= V
REF
4V < V
IN
< 25V
5
V
IN
- V
OUT
= V
SAT10
V
IN
- V
OUT
> 2V
V
IN
- V
OUT
= 10V, I
OUT
= 5mA to 2A
8
•
•
•
•
•
4
MIN
TYP
2.37
0.3
MAX
±1
UNITS
V
%
Rference Voltage Tolerance (@ FB Pin)
2
•
1
±2.5
%
•
0.7
0.20
0.67
0.05
0.002
4.0
4.3
3.6
3
1.7
0.4
15k
0.02 I
LIM
0.04 I
LIM
2.5
25
10
2
0.005
0.003
2.0
0.37
1.00
0.3
0.01
µA
V
V
%
%/V
V
V
A
A
A
A
A
A•W
Internal Current Limit
(See Graph for Guaranteed Curve)
8, 12
3.3
3.1
2.0
1.0
0.2
4.2
4.4
4.2
2.6
1.0
External Current Limit Programming
Constant
External Current Limit Error
Quiescent Supply Current
Supply Current Change with Load
REF Pin Shutoff Current
Thermal Regulation
(See Applications Information)
Reference Voltage Temperature
Coefficient
8
•
•
•
•
•
0.06 I
LIM
+ 0.03
0.09 I
LIM
+ 0.05
3.5
40
25
7
0.014
0.01
A
A
mA
mA/A
mA/A
µA
%/W
%/°C
0.4
AS1185
Rev. 1.1 6/05
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
3
AUSTIN [ AUSTIN SEMICONDUCTOR ]
