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LM2665

SNVS009F – NOVEMBER 1999 – REVISED MAY 2013

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CONNECTION DIAGRAM

6-Pin Small Outline Package

Figure 11. DBV Package Top View

Figure 12. Actual Size

Pin Functions

Function

Pin

Name

Voltage Doubler

Voltage Split

1

V+

Power supply positive voltage input.

Positive voltage output.

2

GND

Power supply ground input

Same as doubler

3

CAP

−

Connect this pin to the negative terminal of the charge-

Same as doubler.

pump capacitor

4

SD

Shutdown control pin, tie this pin to ground in normal

Same as doubler.

operation.

5

OUT

Positive voltage output.

Power supply positive voltage input

6

CAP+

Connect this pin to the positive terminal of the charge-pump

Same as doubler

capacitor.

Circuit Description

The LM2665 contains four large CMOS switches which are switched in a sequence to double the input supply

voltage. Energy transfer and storage are provided by external capacitors. Figure 13 illustrates the voltage

MOSFET switches and the ESR of the capacitors) and the charge transfer loss between capacitors. Details will

be discussed in the following application information section.

Figure 13. Voltage Doubling Principle

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