TPS60400, TPS60401, TPS60402, TPS60403

UNREGULATED 60mA CHARGE PUMP VOLTAGE INVERTER

SLVS324A − JULY 2001 REVISED NOVEMBER 2004

13

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APPLICATION INFORMATION

voltage inverter

The most common application for these devices is a charge-pump voltage inverter (see Figure 23). This

necessary. Refer to the capacitor selection section for suggested capacitor types.

TPS60400

C1−

C1+

35

OUT

IN

GND

1

2

4

CI

1

µF

CO

1

µF

−5 V,

Max 60 mA

Input 5 V

C(fly)

1

µF

Figure 23. Typical Operating Circuit

For the maximum output current and best performance, three ceramic capacitors of 1

µF (TPS60400,

TPS60403) are recommended. For lower currents or higher allowed output voltage ripple, other capacitors can

also be used. It is recommended that the output capacitors has a minimum value of 1

µF. With flying capacitors

lower than 1

µF, the maximum output power will decrease.