LTC3450

7

3450f

PI FU CTIO S

CF1

0.1

µF

C1

2.2

µF

1.5V TO

4.6V

5.1V/10mA

VGH (3

15V/500

µA

10V

VGL

–10V/500

µA

3450 TA01

V2X

SHDN

GLOBAL SHUTDOWN

MODE

SW

OFF ON

BLANK SCAN

L1

47

µH

C2

2.2

µF

C7

1

µF

8

6

4

5

7

9

11

10

12

SHUTDOWN

SYNCHRONOUS

PWM BOOST

CONVERTER

OSCILLATOR

CHARGE PUMP

DOUBLER

IN

OUT

CF2

0.1

µF

V3X

C8

0.47

µF

14

13

15

SHUTDOWN

SHUTDOWN

CHARGE PUMP

TRIPLER

IN

69kHz

550kHz

OUT

CF3

0.1

µF

GND

C11

0.47

µF

1

16

2

3

SHUTDOWN

CHARGE PUMP

INVERTER

IN

OUT

BLOCK DIAGRA

V3X (Pin 15): Charge Pump Tripler Output. This output is

15.3V (nom) at no load and is capable of delivering up to

500

µA to a load. V3X should be bypassed to GND with a

0.1

µF X5R type ceramic capacitor.

Inverter. The charge pump inverter will generate a nega-

generation.

Exposed Pad (Pin 17): The exposed pad must be con-

exposed pad to GND.