Rainbow-electronics MAX871 Manual de usuario descargar pdf (Pagina 8)

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

___________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600

MAX870/MAX871

Switched-Capacitor Voltage Inverters

___________________Chip Information

TRANSISTOR COUNT: 58

SUBSTRATE CONNECTED TO IN

________________________________________________________Package Information

SOT5L.EPS

Shutdown Control

If shutdown control is necessary, use the circuit in

Figure 8. The output resistance of the MAX870/MAX871

will typically be 20Ω plus two times the output resis-

tance of the buffer driving IN. The 0.1µF capacitor at

the IN pin absorbs the transient input currents of the

MAX870/MAX871.

The output resistance of the buffer driving the IN pin

can be reduced by connecting multiple buffers in par-

allel. The polarity of the shutdown signal can also be

changed by using a noninverting buffer to drive IN.

MAX870

MAX871

C1-

OUT

C1+

GND

0.1µF

OUTPUT

INPUT

OFF

SHUTDOWN

LOGIC

SIGNAL

Figure 8. Shutdown Control

1 2 3 4 5 6 7 8

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Rainbow-electronics MAX871 Manual de usuario Pagina 8