LT1614 Просмотр технического описания (PDF) - Linear Technology
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LT1614 Datasheet PDF : 16 Pages
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LT1614
U
OPERATIO
Capacitors
As described previously, ceramic capacitors can be used
with the LT1614. For lower cost applications, small tanta-
lum units can be used. A value of 22µF is acceptable,
although larger capacitance values can be used. ESR is the
most important parameter in selecting an output capaci-
tor. The “flying” capacitor (C2 in the schematic figures)
should be a 1µF ceramic type. An X5R or X7R dielectric
should be used to avoid capacitance decreasing severely
with applied voltage. The input bypass capacitor is less
critical, and either tantalum or ceramic can be used with
little trade-off in circuit performance. Some capacitor
types appropriate for use with the LT1614 are listed in
Table 2.
Diodes
A Schottky diode is recommended for use with the LT1614.
The Motorola MBR0520 is a very good choice. Where the
input to output voltage differential exceeds 20V, use the
MBR0530 ( a 30V diode).
Table 1. Inductor Vendors
VENDOR
PHONE
Sumida
(847) 956-0666
Murata
Coiltronics
(404) 436-1300
(407) 241-7876
Table 2. Capacitor Vendors
VENDOR
PHONE
Taiyo Yuden (408) 573-4150
AVX
(803) 448-9411
Murata
(404) 436-1300
URL
www.sumida.com
www.murata.com
www.coiltronics.com
PART
CLS62-22022
CD43-470
LQH3C-220
CTX20-1
COMMENT
22µH Coupled
47µH
22µH, 2mm Height
20µH Coupled, Low DCR
URL
www.t-yuden.com
www.avxcorp.com
www.murata.com
PART
Ceramic Caps
Ceramic Caps
Tantalum Caps
Ceramic Caps
COMMENT
X5R Dielectric
10
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