Datasheet

Application Information (Continued)
TABLE 2. Low ESR Capacitor Manufacturers
Manufacturer Phone FAX Capacitor Type
Nichicon Corp. (708)-843-7500 (708)-843-2798 PL, PF series, through-hole aluminum electrolytic
AVX Corp. (803)-448-9411 (803)-448-1943 TPS series, surface-mount tantalum
Sprague (207)-324-4140 (207)-324-7223 593D, 594D, 595D series, surface-mount tantalum
Sanyo (619)-661-6835 (619)-661-1055 OS-CON series, through-hole aluminum electrolytic
Other Applications
PARALLELING DEVICES
Any number of MAX660s can be paralleled to reduce the output resistance. Each device must have its own pumping capacitor
C
1
, while only one output capacitor C
out
is needed as shown in Figure 5 . The composite output resistance is:
CASCADING DEVICES
Cascading the is an easy way to produce a greater negative voltage (as shown in
Figure 6 ). If n is the integer representing the
number of devices cascaded, the unloaded output voltage V
out
is (−nV
in
). The effective output resistance is equal to the weighted
sum of each individual device:
DS100898-32
FIGURE 4. Output Source Resistance vs Oscillator Frequency
DS100898-7
FIGURE 5. Lowering Output Resistance by Paralleling Devices
MAX660
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