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LM2576S-ADJ Datasheet(PDF) 11 Page - Texas Instruments |
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LM2576S-ADJ Datasheet(HTML) 11 Page - Texas Instruments |
11 / 37 page LM2576, LM2576HV www.ti.com SNVS107C – JUNE 1999 – REVISED APRIL 2013 TEST CIRCUIT AND LAYOUT GUIDELINES As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance generate voltage transients which can cause problems. For minimal inductance and ground loops, the length of the leads indicated by heavy lines should be kept as short as possible. Single-point grounding (as indicated) or ground plane construction should be used for best results. When using the Adjustable version, physically locate the programming resistors near the regulator, to keep the sensitive feedback wiring short. CIN — 100 μF, 75V, Aluminum Electrolytic COUT — 1000 μF, 25V, Aluminum Electrolytic D1 — Schottky, MBR360 L1 — 100 μH, Pulse Eng. PE-92108 R1 — 2k, 0.1% R2 — 6.12k, 0.1% Figure 21. Fixed Output Voltage Versions where VREF = 1.23V, R1 between 1k and 5k Figure 22. Adjustable Output Voltage Version Copyright © 1999–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LM2576 LM2576HV |
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