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© 2006 Semtech Corp.

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SC250

PRELIMINARY

POWER MANAGEMENT

Pin Descriptions

Pin #

Pin Name

Pin Function

1LX

Inductor connection to the switching FETs

2

VIN

Input voltage connection

3

VREF

2.85V, 20mA reference supply

to supply a resistive divider on V

4

GND

Ground connection

5

VDAC

Analog control voltage input ranges between 0.1 and 1.2V for control of V

with the V

the internal pass MOSFET.

6

VOUT

Regulated output voltage and feedback

7EN

Enable digital input: a high input enables the SC250, a low disables the output and

reduces quiescent current to less than 1μA and LX becomes high impedance.

8

PGND

Ground reference for internal N-channel MOSFET