LTC3537
16
3537fd
APPLICATIONS INFORMATION
For the step-up converter, a tantalum capacitor may be used
in demanding applications that have large load transients.
Another method of improving the transient response is to
add a small feedforward capacitor across the top resistor
of the feedback divider (from V
OUTB
to FBB). A typical value
of 22pF will generally suffi ce.
Ceramic capacitors are also a good choice for input de-
coupling of the step-up converter and should be located
as close as possible to the device. A 2.2µF input capacitor
is suffi cient for most applications, although larger values
may be used without limitations. The LDO regulator will
have improved performance with an input capacitor, but
it is not required. Table 2 shows a list of several ceramic
capacitor manufacturers. Consult the manufacturers di-
rectly for detailed information on their selection of ceramic
capacitors.
Table 2. Capacitor Vendor Information
SUPPLIER PHONE WEBSITE
AVX (803) 448-9411 www.avxcorp.com
Murata (714) 852-2001 www.murata.com
Taiyo-Yuden (408) 573-4150 www.t-yuden.com
TDK (847) 803-6100 www.component.tdk.com
Samsung (408) 544-5200 www.sem.samsung.com
