LP3368-02

May. -2014

www.lowpowersemi.com

Page 2 of 8

Preliminary Datasheet

LP3368

Functional Pin Description

Package Type

Pin Configurations

TQFN-16

C21

C12

MODE1

VIN1

C11

VOUT1

VIN2

1

2

4

3

5

6

7

8

9

10

11

12

13

14

15

16

C22

RSET2

FB2

VOUT2

FB1

EN2

MODE2

EN1

RSET1

GND

Pin Description

Pin

Name

Description

2,4

VIN1,

VIN2

Input voltage for the charge pump, Decouple with 4.7uF ceramic capacitor close to the

pins of the IC.

5,6

C11,

C21

Positive input for the external flying capacitor. Connect a ceramic 1uF capacitor close to

the pins of the IC.

15,16

C12,

C22

Negative input for the external flying capacitor. Connect a ceramic 1uF capacitor close to

the pins of the IC.

7,12

Mode1,

Mode2

Logic input to toggle operation between FLASH and TORCH mode. In TORCH mode FB

is regulated to the internal 50mV reference. In FLASH mode FB reference voltage can be

8,11

EN1,

EN2

Shutdown control Input. Connect to VIN for normal operation, connect to ground for

shutdown.

10,13

Rset1,

Rset2

Connect a resistor from this pin to ground, When in FLASH mode ( MODE pin = High )

this resistor sets the current regulation point according to the following:

9,14

FB1,

FB2

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

resistor.

1,3

VOUT1,

VOUT2

Charge pump output voltage. Decouple with an external capacitor. At least 2uF is

recommended. If Higher value capacitor is used output ripple is smaller.

Bottom

Pad

GND

Ground pin.