© 1999 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

DUAL INPUT

LOW DROPOUT REGULATOR

EZ1580/EZ1581

EZ1582/EZ1583

February 26, 1999

2

PIN CONFIGURATION

PIN DESCRIPTION

Pin Pin Name

Pin Function

1

SENSE

This pin is the positive side of the reference voltage for this device. With this pin it is possible to

Kelvin sense the output voltage at the load.

2

ADJUST /

GROUND

This pin is the negative side of the reference voltage for the device. Transient response can be

improved by adding a small bypass capacitor from the adjust pin to ground.

This pin is the bottom end of the internal resistor feedback chain for fixed output voltage parts,

and should be connected to ground.

3

OUTPUT

This is the power output of the device, and is electrically connected to the TAB.

4

CONTROL This pin is the supply pin for the control circuitry for the device. The current flow into this pin will

be approximately 1% of the output current. For the device to regulate, the voltage at this pin must

be between 1.0V and 1.3V greater than the output voltage (see dropout specifications).

5

POWER

This is the collector input to the power device of the EZ158X. The output load current is supplied

through this pin. For the device to regulate, the voltage on this pin must be between 0.1V and

0.7V greater than the output voltage, depending upon load current (see dropout specifications).