Advanced Monolithic Systems, Inc.

6680B Sierra Lane, Dublin, CA 94568 Phone (925) 556-9090 Fax (925) 556-9140

AMS2501/AMS2502

ELECTRICAL CHARACTERISTICS

Parameter

Device

Conditions

Min

Typ

Max

Units

Thermal Regulation

AMS2501/AMS2502

0.002

0.020

%W

Dropout Voltage

Note 2

Control Dropout

AMS2501/AMS2502/-1.5/-

1.8/-2.5/-2.85/-3.0/-3.3/-

3.5/-5.0

1.00

1.15

1.15

1.30

V

V

Power Dropout

AMS2501/AMS2502/-1.5/-

1.8/-2.5/-2.85/-3.0/-3.3/-

3.5/-5.0

.05

.30

0.15

0.50

V

V

Parameters identified with boldface type apply over the full operating temperature range.

Electrical Characteristics

the minimum input/output voltage required to maintain 1% regulation.

used to set the output voltage is selected to meet the minimum load current requirement.

minimum value is equal to the quiescent current of the device.

PIN FUNCTIONS

device of the AMS2501/AMS2502. The output load

current is supplied through this pin. The voltage at this

pin must be between 0.1V and 0.8V greater than the

output voltage for the device to regulate.

Output (Pin 2 and 3): These are the power output of the

device. Pin 2 and 3 are fused together and with the

package paddle serving also as heat sink.

Sense (Pin 4): This pin is the positive side of the

reference voltage for the device. With this pin it is

possible to Kelvin sense the output voltage at the load.

On/Off (Pin 5 AMS2502 only): This pin puts the device

in a stand-by mode.

Reference (Pin 7 AMS2502 only): This pin allows the

user to add a bypass capacitor on the reference voltage.

Adjust (Pin 6): This pin is the negative side of the

reference voltage for the device. Adding a small bypass

capacitor from the Adjust pin to ground improves the

transient response. For fixed voltage devices the Adjust

pin is also brought out to allow the user to add a bypass

capacitor.

GND (Pin 6): For fixed voltage devices this is the

bottom of the resistor divider that sets the output

voltage.

control circuitry of the device. The current flow into

this pin will be about 1% of the output current. The

voltage at this pin must be between 1.0V and 1.3V

greater than the output voltage for the device to

regulate.