9

LTC660

8

7

6

5

4

3

2

1

C1

150

µF

LTC1046 • TA10

C2

150

µF

OUTPUT COMMON

(9V)

3V

≤ V

LTC660

+

Figure 10. Battery Splitter

Paralleling for Lower Output Resistance

Additional flexibility of the LTC660 is shown in Figures 11

and 12. Figure 11 shows two LTC660s connected in

parallel to provide a lower effective output resistance. If,

however, the output resistance is dominated by 1/fC1,

increasing the capacitor size (C1) or increasing the fre-

quency will be of more benefit than the paralleling circuit

shown.

Stacking for Higher Voltage

Figure 12 makes use of “stacking” two LTC660s to provide

even higher voltages. In Figure 12, a negative voltage

doubler or tripler can be achieved depending upon how

Pin 8 of the second LTC660 is connected, as shown

schematically by the switch.

Figure 12. Stacking for High Voltage

8

7

6

5

4

3

2

1

150

µF

LTC660 • F12

150

µF

150

µF

150

µF

+

+

LTC660

1

8

7

6

5

4

3

2

1

LTC660

2

+

8

7

6

5

4

3

2

1

C1

150

µF

LTC660 • F11

8

7

6

5

4

3

2

1

C1

150

µF

C2

150

µF

+

1/4 CD4077

OPTIONAL SYNCHRONIZATION

CIRCUIT TO MINIMIZE RIPPLE

LTC660

LTC660

+

+

Figure 11. Paralleling for 200mA Load Current