AMS2908
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
OUT
= 0 mA, and T
J
= +25°C unless otherwise specified.
Parameter
Load Regulation
(Notes 2, 3)
Device
AMS2908-2.85
Conditions
V
IN
= 5V, 0
≤
I
OUT
≤
800mA
Min
Typ
3
6
Max
12
20
Units
mV
mV
AMS2908-3.3
V
IN
= 5V, 0
≤
I
OUT
≤
800mA
3
7
15
25
mV
mV
AMS2908-5.0
V
IN
= 8V, 0
≤
I
OUT
≤
800mA
5
10
20
35
mV
mV
Dropout Voltage
(V
IN
-
V
OUT
)
AMS2908-1.5/-1.8/-2.5/-
2.85/-3.3/-5.0
∆V
OUT
,
∆V
REF
= 1%, I
OUT
= 800mA (Note 4)
1.1
1.3
V
Current Limit
AMS2908-1.5/-1.8/-2.5/-
2.85/-3.3/-5.0
(V
IN
- V
OUT
) = 5V
900
1,100
1,500
mA
Minimum Load
Current
AMS2908
(V
IN
- V
OUT
) = 12V (Note 5)
5
10
mA
Quiescent Current
AMS2908-1.5/-1.8/-2.5/-
2.85/-3.3/-5.0
V
IN
≤
12V
5
10
mA
Ripple Rejection
AMS2908
f =120Hz , C
OUT
= 25µF Tantalum, I
OUT
= 800mA,
(V
IN
-V
OUT
) = 3V, C
ADJ
=25µF
60
75
dB
AMS2908-1.5/-1.8/-2.5/-
2.85
f =120Hz , C
OUT
= 25µF Tantalum, I
OUT
= 800mA,
V
IN
= 6V
60
72
dB
AMS2908-3.3
f =120Hz , C
OUT
= 25µF Tantalum, I
OUT
= 800mA
V
IN
= 6.3V
60
72
dB
AMS2908-5.0
f =120Hz , C
OUT
= 25µF Tantalum, I
OUT
= 800mA
V
IN
= 8V
60
68
dB
Thermal Regulation
AMS2908
T
A
= 25°C, 30ms pulse
0.008
0.04
%W
Adjust Pin Current
AMS2908
10mA
≤
I
OUT
≤
800mA , 1.5V≤ (V
IN
- V
OUT
)
≤
12V
55
120
µA
µA
Adjust Pin Current
Change
AMS2908
10mA
≤
I
OUT
≤
800mA , 1.5V≤ (V
IN
- V
OUT
)
≤
12V
0.2
5
µA
Temperature Stability
0.5
%
Long Term Stability
T
A
=125°C, 1000Hrs
0.3
1
%
RMS Output Noise
(% of V
OUT
)
T
A
= 25°C , 10Hz
≤
f
≤
10kHz
0.003
%
Thermal Resistance
Junction-to-Case
15
°C/W
Parameters identified with
boldface type
apply over the full operating temperature range.
Note 1:
Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. For guaranteed specifications and test conditions, see the
Electrical Characteristics
.
The guaranteed specifications apply only for the test conditions listed.
Note 2:
Line and Load regulation are guaranteed up to the maximum power dissipation of 1.2 W. Power dissipation is determined by the input/output
differential and the output current. Guaranteed maximum power dissipation will not be available over the full input/output range.
Note 3:
See thermal regulation specifications for changes in output voltage due to heating effects. Line and load regulation are measured at a constant
junction temperature by low duty cycle pulse testing. Load regulation is measured at the output lead ~1/8” from the package.
Note 4:
Dropout voltage is specified over the full output current range of the device.
Note 5:
Minimum load current is defined as the minimum output current required to maintain regulation. When 1.5V
≤
(V
IN
- V
OUT
)
≤
12V the device is
guaranteed to regulate if the output current is greater than 10mA.
3
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
