Advanced Monolithic Systems, Inc.

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

AMS1508

ELECTRICAL CHARACTERISTICS

Parameter

Device

Conditions

Min

Typ

Max

Units

Dropout Voltage

Note 2

Control Dropout

AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

1.00

1.15

1.15

1.30

V

V

Power Dropout

AMS1508/-1.5/-2.5/-2.85/

-3.0/-3.3/-3.5/-5.0

.10

.45

0.17

0.50

V

V

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

Electrical Characteristics

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

Sense (Pin 1): 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.

Adjust (Pin 2/5): 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 2, 7-Lead only): For fixed voltage devices this

is the bottom of the resistor divider that sets the output

voltage.

device of the AMS1508. 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.

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 1.3V or greater than the

output voltage for the device to regulate.

Output (Pin 3/4): This is the power output of the

device.