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LT1614 Datasheet(PDF) 10 Page - Linear Technology |
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LT1614 Datasheet(HTML) 10 Page - Linear Technology |
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10 / 16 page  10 LT1614 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 22 µF 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 1 µF 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). OPERATIO Table 1. Inductor Vendors VENDOR PHONE URL PART COMMENT Sumida (847) 956-0666 www.sumida.com CLS62-22022 22 µH Coupled CD43-470 47 µH Murata (404) 436-1300 www.murata.com LQH3C-220 22 µH, 2mm Height Coiltronics (407) 241-7876 www.coiltronics.com CTX20-1 20 µH Coupled, Low DCR Table 2. Capacitor Vendors VENDOR PHONE URL PART COMMENT Taiyo Yuden (408) 573-4150 www.t-yuden.com Ceramic Caps X5R Dielectric AVX (803) 448-9411 www.avxcorp.com Ceramic Caps Tantalum Caps Murata (404) 436-1300 www.murata.com Ceramic Caps |
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