MAX660M National Semiconductor, MAX660M Datasheet - Page 7

• Manufacturer Part Number: MAX660M
• Description: DC/DC Charge Pump Converter IC
• Manufacturer: National Semiconductor

Specifications of MAX660M

• No. Of Pins: 8
• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 550V
• Leaded Process Compatible: No
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Application Information
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
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
sum of each individual device:
Nichicon Corp.
AVX Corp.
Sprague
Sanyo
1
Manufacturer
, while only one output capacitor C
(708)-843-7500
(803)-448-9411
(207)-324-4140
(619)-661-6835
Phone
FIGURE 5. Lowering Output Resistance by Paralleling Devices
FIGURE 4. Output Source Resistance vs Oscillator Frequency
out
TABLE 2. Low ESR Capacitor Manufacturers
is needed as shown in Figure 5 . The composite output resistance is:
(Continued)
(708)-843-2798
(803)-448-1943
(207)-324-7223
(619)-661-1055
FAX
out
PL, PF series, through-hole aluminum electrolytic
TPS series, surface-mount tantalum
593D, 594D, 595D series, surface-mount tantalum
OS-CON series, through-hole aluminum electrolytic
is (−nV
7
in
). The effective output resistance is equal to the weighted
Capacitor Type
DS100898-32
DS100898-7
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