Related Manuals for Texas Instruments LM3485
Summary of Contents for Texas Instruments LM3485
- Page 1 AN-1227 LM3485 Evaluation Board User's Guide Literature Number: SNVA052A May 2004 – Revised May 2004...
- Page 2 Contents ........................Introduction ..................Output Voltage Current Limit Setting ......................Layout Fundamentals Table of Contents SNVA052A – May 2004 – Revised May 2004 Submit Documentation Feedback Copyright © 2004, Texas Instruments Incorporated...
- Page 3 Regulator with 3.3V Output at 0.5A ..................Component Location (Top Side) ........................Top Layer ........................ Bottom Layer List of Tables ......................Bill of Materials SNVA052A – May 2004 – Revised May 2004 List of Figures Submit Documentation Feedback Copyright © 2004, Texas Instruments Incorporated...
- Page 4 The LM3485 is a Hysteretic P-FET Buck Controller, which uses a pulse-frequency modulation (PFM) scheme to regulate the output voltage. This LM3485 demo board and the recommended components are intended to demonstrate the performance with a 3.3V output from a 12V source. The demo board can be used with source voltages from 7V to 28V to deliver output load currents up to 1A.
- Page 5 The LM3485 is a Hysteretic P-FET Buck Controller, which uses a pulse-frequency modulation (PFM) scheme to regulate the output voltage. This LM3485 demo board and the recommended components are intended to demonstrate the performance with a 3.3V output from a 12V source. The demo board can be used with source voltages from 7V to 28V to deliver output load currents up to 1A.
- Page 6 Figure 2. Component Location (Top Side) Layout Fundamentals The LM3485 can work in a wide range of applications. For your application circuit, proper layout for the buck regulator should be implemented by following a few simple guidelines. 1. Place the power components, which are the MOSFET, diode, inductor and filter capacitors, close together.
- Page 7 4. Keep the trace short between the ground pin of the input capacitor and the anode of the diode. 5. Ensure the ground is low impedance. Figure 3. Top Layer Figure 4. Bottom Layer SNVA052A – May 2004 – Revised May 2004 AN-1227 LM3485 Evaluation Board Submit Documentation Feedback Copyright © 2004, Texas Instruments Incorporated...
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Page 8: Important Notice
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue.
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