Datasheet

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MAX870/MAX871
Switched-Capacitor Voltage Inverters
___________________Chip Information
TRANSISTOR COUNT: 58
Shutdown Control
For a similar device with logic-controlled shutdown,
please refer to the MAX1720/MAX1721. To add manual
shutdown control to the MAX870/MAX871, use the circuit
in Figure 8. The output resistance of the MAX870/
MAX871 will typically be 20Ω plus two times the output
resistance 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
0.1µF
C1
3
5
4
OUTPUT
INPUT
OFF
ON
SHUTDOWN
LOGIC
SIGNAL
Figure 8. Shutdown Control
SOT-23 5L .EPS
E
1
1
21-0057
PACKAGE OUTLINE, SOT-23, 5L
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,
go to www.maxim-ic.com/packages
.)