CAT660

10

Doc. No. MD-5000, Rev. W

POSITIVE VOLTAGE DOUBLER

Figure 8: Voltage Doubler

1

2

3

4

8

7

6

5

CAT660

+

BOOST/FC

CAP+

GND

CAP-

VOUT = 2VIN

+

VIN

2.5V to 5.5V

1N5817*

*SCHOTTKY DIODE IS FOR START-UP ONLY

V+

OSC

LV

OUT

TYPICAL APPLICATIONS

VOLTAGE INVERSION POSITIVE-TO-NEGATIVE

The CAT660 easily provides a negative supply voltage from a positive supply in the system. Figure 7 shows a typical

circuit. The LV pin may be left floating for positive input voltages at or above 3.3V.

Figure 7: Voltage Inverter

+

VOUT = -VIN

C2

1

2

3

4

8

7

6

5

CAT660

NC

+

C1

VIN

1.5V to 5.5V

BOOST/FC

CAP+

GND

CAP-

V+

OSC

LV

OUT