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LM2621 Datasheet(PDF) 9 Page - Texas Instruments |
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LM2621 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 18 page LM2621 www.ti.com SNVS033C – MAY 2004 – REVISED MARCH 2005 Table 1. Suggested Manufacturers List Inductors Capacitors Diodes Coilcraft Sprague/ Vishay Motorola Tel: (800) 322-2645 Tel: (207) 324-4140 Tel: (800) 521-6274 Fax: (708) 639-1469 Fax: (207) 324-7223 Fax: (602) 244-6609 Coiltronics Kemet International Rectifier (IR) Tel: (407) 241-7876 Tel: (864) 963-6300 Tel: (310) 322-3331 Fax: (407) 241-9339 Fax: (864) 963-6521 Fax: (310) 322-3332 Pulse Engineering Nichicon General Semiconductor Tel: (619) 674-8100 Tel: (847) 843-7500 Tel: (516) 847-3222 Fax: (619) 674-8262 Fax: (847) 843-2798 Fax: (516) 847-3150 PC BOARD LAYOUT High switching frequencies and high peak currents make a proper layout of the PC board an important part of design. Poor design can cause excessive EMI and ground-bounce, both of which can cause malfunction and loss of regulation by corrupting voltage feedback signal and injecting noise into the control section. Power components - such as the inductor, input and output filter capacitors, and output diode - should be placed as close to the regulator IC as possible, and their traces should be kept short, direct and wide. The ground pins of the input and output filter capacitors and the PGND and SGND pins of LM2621 should be connected using short, direct and wide traces. The voltage feedback network (RF1, RF2, and CF1) should be kept very close to the FB pin. Noisy traces, such as from the SW pin, should be kept away from the FB and VDD pins. The traces that run between Vout and the FB pin of the IC should be kept away from the inductor flux. Always provide sufficient copper area to dissipate the heat due to power loss in the circuitry and prevent the thermal protection circuitry in the IC from shutting the IC down. Copyright © 2004–2005, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: LM2621 |
Similar Part No. - LM2621_15 |
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Similar Description - LM2621_15 |
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