CAT660EVA-GT3 Datasheet, PDF (9/13 Pages) ON Semiconductor – 100 mA CMOS Charge Pump Inverter/Doubler

CAT660
Capacitor Suppliers
The following manufacturers supply low−ESR capacitors:
Table 6. CAPACITOR SUPPLIERS
Manufacturer
Capacitor Type
AVX/Kyocera
TPS/TPS3
Vishay/Sprague
595
Sanyo
MV−AX, UGX
Nichicon
F55
HC/HD
Phone
843−448−9411
402−563−6866
619−661−6835
847−843−7500
WEB
www.avxcorp.com
www.vishay.com
www.sanyo.com
www.nichicon−us.com
Email
[e-mail]
−
[e-mail]
−
Comments
Tantalum
Aluminum
Aluminum
Tantalum
Aluminum
Capacitor manufacturers continually introduce new series and offer different package styles. It is recommended that before
a design is finalized capacitor manufacturers should be surveyed for their latest product offerings.
Controlling Loss in CAT660 Applications
There are three primary sources of voltage loss:
1. Output resistance:
VLOSSW = ILOAD x ROUT, where ROUT is the
CAT660 output resistance and ILOAD is the load
current.
2. Charge pump (C1) capacitor ESR:
VLOSSC1 ≈ 4 x ESRC1 x ILOAD, where
ESRC1 is the ESR of capacitor C1.
3. Output or reservoir (C2) capacitor ESR:
VLOSSC2 = ESRC2 x ILOAD, where ESRC2 is
the ESR of capacitor C2.
Increasing the value of C2 and/or decreasing its ESR will
reduce noise and ripple.
The effective output impedance of a CAT660 circuit is
approximately:
Rcircuit [ Rout 660 ) (4 ESRC1) ) ESRC2
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