S

6

4

© 2009 Exar Corporation

4/12

Rev. 2.0.0

PIN DESCRIPTION

Name

Pin Number

Description

1

Input voltage for the charge pump. Decouple with 2.2µF ceramic capacitor close to the

pins of the IC.

C1

2

Positive input for the external fly capacitor. Connect a ceramic 0.47µF capacitor close to

the pins of the IC.

C2

3

Negative input for the external fly capacitor. Connect a ceramic 0.47µF capacitor close

to the pins of the IC.

FLASH

4

Logic input to toggle between FLASH and TORCH mode. In TORCH Mode FB is regulated

to the internal 50mV reference. In FLASH Mode FB reference voltage can be adjusted by

EN

5

shutdown.

6

Connect a resistor from this pin to ground. When in FLASH Mode (FLASH = High) this

resistor sets the current regulation point according to the following:

FB

7

Feedback input for the current control loop. Connect directly to the current sense

resistor.

8

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

9

Power ground pin. Fly capacitor current returns through this pin.

10

Charge Pump Output Voltage. Decouple with an external capacitor. At least 1µF is

recommended. Higher capacitor values reduce output ripple.

ORDERING INFORMATION

Part Number

Temperature

Range

Marking

Package

Packing

Quantity

Note 1

Note 2

SP6686ER-L

SP66

86ER

WWX

DFN-10

Bulk

RoHS Compliant

Halogen Free

SP6686ER-L/TR

SP66

86ER

WWX

DFN-10

3K/Tape & Reel RoHS Compliant

Halogen Free

SP6686EB

SP6686 Evaluation Board

“WW” = Work Week – “X” = Lot Number