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LM3355 Fiches technique(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No de pièce LM3355
Description  Regulated 50mA Buck-Boost Switched Capacitor DC/DC Converter
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Fabricant  NSC [National Semiconductor (TI)]
Site Internet  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3355 Fiches technique(HTML) 7 Page - National Semiconductor (TI)

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Filter Capacitor Selection (Continued)
iii) C
FIL
A 1 µF, X7R ceramic capacitor should be connected to pin
C
FIL. This capacitor provides the filtering needed for the
internal supply rail of the LM3355.
Of the different capacitor technologies, a sample of vendors
that have been verified as suitable for use with the LM3355
are shown in
Table 2.
TABLE 2. Capacitor Vendor Information
Manufacturer
Tel
Fax
Website
Ceramic
Taiyo-yuden
(408) 573-4150
(408) 573-4159
www.t-yuden.com
AVX
(803) 448-9411
(803) 448-1943
www.avxcorp.com
Sprague/Vishay
(207) 324-4140
(207) 324-7223
www.vishay.com
Tantalum
Nichicon
(847) 843-7500
(847) 843-2798
www.nichicon.com
Polymer Electrolytic
Cornell-Dubilier (ESRD)
(508) 996-8561
(508) 996-3830
www.cornell-dubilier.com
Sanyo (POSCAP)
(619) 661-6322
(619) 661-1055
www.sanyovideo.com
Thermal Protection
During output short circuit conditions, the LM3355 will draw
high currents causing a rise in the junction temperature.
On-chip thermal protection circuitry disables the charge
pump action once the junction temperature exceeds the
thermal trip point, and re-enables the charge pump when the
junction temperature falls back to a safe operating point.
Typical Application Circuits
DS200219-33
FIGURE 2. Basic Buck/Boost Regulator
DS200219-15
FIGURE 3. Low Output Noise and Ripple Buck/Boost Regulator
www.national.com
7


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