LM2662, LM2663

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SNVS002D – JANUARY 1999 – REVISED MAY 2013

CASCADING DEVICES

Cascading the LM2662s (or LM2663s) is an easy way to produce a greater negative voltage (as shown in

(

(5)

A three-stage cascade circuit shown in Figure 22 generates

Cascading is also possible when devices are operating in doubling mode. In Figure 23, two devices are

An example of using the circuit in Figure 22 or Figure 23 is generating +15V or

−15V from a +5V input.

Note that, the number of n is practically limited since the increasing of n significantly reduces the efficiency and

increases the output resistance and output voltage ripple.

Figure 21. Increasing Output Voltage by Cascading Devices

Figure 22. Generating

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