AMS1505
General Description
The AMS1505 series of adjustable and fixed low
dropout voltage regulators are designed to provide 5A
output current to power the new generation of
microprocessors. The dropout voltage of the device is
100mV at light loads and rising to 500mV at maximum
output current. A second low current input voltage 1V
or greater then the output voltage is required to
achieve this dropout. The AMS1505 can also be used
as a single supply device.
New features have been added to the AMS1505: a
remote Sense pin is brought out virtually eliminating
output voltage variations due to load changes. The
typical load regulation, measured at the Sense pin, for
a load current step of 100mA to 5A is less than 1mV.
The AMS1505 series has fast transient response. The
Adjust pin is brought out on fixed devices. To further
improve the transient response the addition of a small
capacitor on the Adjust pin is recommended.
The AMS1505 series are ideal for generating
processor supplies of 2V to 3V on motherboards
where both 5V and 3.3V supplies are available.
The AMS1505 devices are offered in 5 lead TO-220,
5L TO-263 (plastic DD) and 5L TO-252 (DPAK)
packages.
Features
•
Adjustable or Fixed Output
1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V
•
Output Current of 5A
•
Low Dropout, 500mV at 5A Output Current
•
Fast Transient Response
•
Remote Sense
•
Adjustable or Fixed Output
Applications
•
High Current Regulators
•
Post Regulators for Switching Supplies
•
Adjustable Power Supply
•
Notebook/Personal Computer Supplies
Typical Application
V
CONTROL
+
CONTROL
POWER OUTPUT
V
POWER
+
V
OUT
+
AMS1505
SENSE
ADJ
R1
R2
1
Advanced Monolithic Systems
http://www.ams-semitech.com
AMS [ Advanced Monolithic Systems Ltd ]
