AMS1508
ABSOLUTE MAXIMUM RATINGS
(Note 1)
V
POWER
Input Voltage
V
CONTROL
Input Voltage
Operating Junction Temperature
Control Section
Power Transistor
Storage temperature
7V
13V
0°C to 125°C
0°C to 150°C
- 65°C to +150°C
Soldering information
Lead Temperature (25 sec)
Thermal Resistance
TO-220 package
TO-263 package
265°C
ϕ
JA
= 50°C/W
ϕ
JA
= 30°C/W*
* With package soldering to 0.5in
2
copper area over backside ground
plane or internal power plane
ϕ
JA
can vary from 20°C/W to
>40°C/W
depending on mounting technique.
ELECTRICAL CHARACTERISTICS
Electrical Characteristics at I
LOAD
= 0 mA, and T
J
= +25°C unless otherwise specified.
Parameter
Reference Voltage
Device
AMS1508
Conditions
V
CONTROL
= 2.75V, V
POWER
=2V, I
LOAD
= 10mA
V
CONTROL
= 2.7V to 12V, V
POWER
=3.3V to 5.5V,
I
LOAD
= 10mA to 8A
V
CONTROL
= 4V, V
POWER
=2.V, I
LOAD
= 0mA
V
CONTROL
= 3V, V
POWER
=2.3V, I
LOAD
= 0mA to 8A
V
CONTROL
= 5V, V
POWER
=3.3V, I
LOAD
= 0mA
V
CONTROL
= 4V, V
POWER
=3.3V, I
LOAD
= 0mA to 8A
V
CONTROL
= 5.35V, V
POWER
=3.35V, I
LOAD
= 0mA
V
CONTROL
= 4.4V, V
POWER
=3.7V, I
LOAD
= 0mA to 8A
V
CONTROL
= 5.5V, V
POWER
=3.5V, I
LOAD
= 0mA
V
CONTROL
= 4.5V, V
POWER
=3.8V, I
LOAD
= 0mA to 8A
V
CONTROL
= 5.8V, V
POWER
=3.8V, I
LOAD
= 0mA
V
CONTROL
= 4.8V, V
POWER
=4.1V, I
LOAD
= 0mA to 8A
V
CONTROL
= 6V, V
POWER
=4V, I
LOAD
= 0mA
V
CONTROL
= 5V, V
POWER
=4.3V, I
LOAD
= 0mA to 8A
V
CONTROL
= 7.5V, V
POWER
=5.5V, I
LOAD
= 0mA
V
CONTROL
= 6.5V, V
POWER
=5.8V, I
LOAD
= 0mA to 8A
I
LOAD
= 10 mA , 1.5V≤ (V
CONTROL
- V
OUT
)
≤
12V
0.8V≤ (V
POWER
- V
OUT
)
≤
5.5V
V
CONTROL
= V
OUT
+ 2.5V, V
POWER
=V
OUT
+ 0.8V,
I
LOAD
= 10mA to 8A
V
CONTROL
= 5V, V
POWER
=3.3V, V
ADJ
= 0V (Note 3)
V
CONTROL
= V
OUT
+ 2.5V, V
POWER
=V
OUT
+ 0.8V,
I
LOAD
= 10mA to 8A
V
CONTROL
= V
OUT
+ 2.5V, V
POWER
=V
OUT
+ 0.8V,
I
LOAD
= 10mA to 8A
V
CONTROL
= 2.75V, V
POWER
= 2.05V, I
LOAD
= 10mA
(V
IN
- V
OUT
) = 5V
Min
1.243
1.237
1.491
1.485
2.485
2.475
2.821
2.833
2.982
2.970
3.280
3.235
3.479
3.430
4.930
4.950
Typ
1.250
1.250
1.500
1.500
2.500
2.500
2.850
2.850
3.000
3.000
3.300
3.300
3.500
3.500
5.000
5.000
1
Max
1.258
1.263
1.509
1.515
2.515
2.525
2.879
2.867
3.018
3.030
3.320
3.333
3.521
3.535
5.030
5.050
3
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
mV
Output Voltage
AMS1508-1.5
AMS1508-2.5
AMS1508-2.85
AMS1508-3.0
AMS1508-3.3
AMS1508-3.5
AMS1508-5.0
Line Regulation
AMS1508/-1.5/-2.5/-2.85/
-3.0/-3.3/-3.5/-5.0
Load Regulation
AMS1508/-1.5/-2.5/-2.85/
-3.0/-3.3/-3.5/-5.0
Minimum Load
Current
Control Pin Current
(Note 4)
Ground Pin Current
(Note 4)
Adjust Pin Current
Current Limit
AMS1508
AMS1508/-1.5/-2.5/-2.85/
-3.0/-3.3/-3.5/-5.0
AMS1508-1.5/-2.5/-2.85/
-3.0/-3.3/-3.5/-5.0
AMS1508
AMS1508/-1.5/-2.5/-2.85/
-3.0/-3.3/-3.5/-5.0
Ripple Rejection
AMS1508/-1.5/-2.5/-2.85/
-3.0/-3.3/-3.5/-5.0
Thermal Regulation
Thermal Resistance
Junction-to-Case
AMS1508
1
5
mV
5
80
10
135
mA
mA
6
10
mA
50
7.1
8.0
120
µA
A
V
CONTROL
= V
POWER
= V
OUT
+ 2.5V, V
RIPPLE
= 1V
P-P
I
LOAD
= 4A
T
A
= 25°C, 30ms pulse
T Package: Control Circuitry/ Power Transistor
M Package: Control Circuitry/ Power Transistor
60
80
dB
0.002
0.020
0.65/2.70
0.65/2.70
%W
°C/W
°C/W
Advanced Monolithic Systems, Inc.
www.advanced-monolithic.com
Phone (925) 443-0722
Fax (925) 443-0723
ADMOS [ ADVANCED MONOLITHIC SYSTEMS ]
