Table 3. SP6655 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

BLON

Open drain battery low output – need to pullup to supply

externally. Vin - Vout below threshold pulls this node to

ground. Vin - Vout above threshold, this node is open.

3

D1

Digital mode control input. See Table 1 for definition.

4

D0

Digital mode control input. See Table 1 for definition.

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 and BLON

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.

10