Rainbow Electronics MAX871 - Manual (Page 8)

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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 20
Ω
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
2
C1- IN
OUT
C1+
GND
1
C2
C IN
0.1 µ F
C1
3
5
4
OUTPUT
INPUT
OFF
ON
SHUTDOWN
LOGIC
SIGNAL
Figure 8. Shutdown Control