Rev 10/17/05

SP6655 Evaluation Board Manual

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Table 3. SP6656 PIN ASSIGNMENT

Pin

Name

Pin Description

Pin

NO.

PVin

Input voltage power pin. Inductor charging current passes

through this pin.

1

Vin

Internal supply voltage. Control circuitry powered from this

pin.

2

OVSO

Output Voltage Select Open Drain Output .

3

OVSI

Output Voltage Select digital input.

4

EN

Enable digital input.

5

FB

External feedback network input connection. Connect a

resistor from FB to ground and FB to Vout to control the

output voltage. This pin regulates to the internal reference

voltage of 0.8V.

6

Vout

Output voltage sense pin. Used for internal timing circuitry.

7

GND

Internal ground pin. Control circuitry returns current to this pin.

8

PGND

Power ground pin. Synchronous rectifier current returns

through this pin.

9

LX

Inductor switching node. Inductor tied between this pin and

the output capacitor to create Vout.

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