Advanced Monolithic Systems, Inc. 6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140
Advanced AMS1505
Monolithic 5A LOW DROPOUT VOLTAGE REGULATORS
Systems
FEATURES APPLICATIONS
• Adjustable or Fixed Output • High Current Regulators
1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V • Post Regulators for Switching Supplies
• Output Current of 5A • Microprocessor Supply
• Low Dropout, 500mV at 5A Output Current • Adjustable Power Supply
• Fast Transient Response • Notebook/Personal Computer Supplies
• Remote Sense
GENERAL DESCRIPTION
The 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 and TO-263 (plastic DD) packages and in the 7 lead TO-220 package.
ORDERING INFORMATION: PIN CONNECTIONS

PACKAGE TYPE OPERATING JUNCTION
5 LEAD TO-263 5 LEAD TO-220 7 LEAD TO-220 TEMPERATURE RANGE
AMS1505CM AMS1505CT AMS1505CT-1.5 0 to 125 ° C
AMS1505CM-1.5 AMS1505CT-1.5 AMS1505CT-2.5 0 to 125 ° C
AMS1505CM-2.5 AMS1505CT-2.5 AMS1505CT-2.85 0 to 125 ° C
AMS1505CM-2.85 AMS1505CT-2.85 AMS1505CT-3.0 0 to 125 ° C
AMS1505CM-3.0 AMS1505CT-3.0 AMS1505CT-3.3 0 to 125 ° C
AMS1505CM-3.3 AMS1505CT-3.3 AMS1505CT-3.5 0 to 125 ° C
AMS1505CM-3.5 AMS1505CT-3.5 AMS1505CT-5.0 0 to 125 ° C
AMS1505CM-5.0 AMS1505CT-5.0 0 to 125 ° C

5
4
3
2
1
V POWER
V CONTROL
OUTPUT
ADJUST/GND
SENSE
FRONT VIEW
5 LEAD TO-220
7 6
5 4
3 2
1
NC Vpower
ADJUST OUTPUT
Vcontrol
GNDSENSE
7 LEAD TO-220
FRONT VIEW
5
4
3
2
1
V power
V control
OUTPUT
ADJUST/GND
SENSE
FRONT VIEW
5 LEAD TO-263