© 2000 SEMTECH CORP.

652 MITCHELL ROAD NEWBURY PARK CA 91320

VERY LOW DROPOUT 1.5 AMP

REGULATOR WITH ENABLE

SC1565

October 3, 2000

4

PIN DESCRIPTIONS

Pin Name

Pin Functiom

ADJ

This pin, when grounded, sets the output voltage to that set by the internal feedback resistors. If ex-

ternal feedback resistors are used, the output voltage will be (See Application Circuit):

EN

Enable Input. Pulling this pin below 0.4V turns the regulator off, reducing the quiescent current to a

fraction of its operating value. The device will be enabled if this pin is left open. Connect to VIN if not

being used.

GND

Reference ground. Use all four pins on the SO-8 device for heatsinking. Use the tab on the TO-220

devices for heatsinking.

VIN

Input voltage. For regulation at full load, the input to this pin must be between (VO + 0.7V) and 5.5V.

Minimum VIN = 2.2V.

VO

This pin is the power output of the device.

Volts

R2

R2)

(R1

1.200

VO

+

=

*

*

BLOCK DIAGRAM