LM2611 Demoboard National Semiconductor Application Note 1203 Mar

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LM2611 Demoboard National Semiconductor Application Note 1203 Mar

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LM2611 Demoboard
LM2611 Demoboard
National Semiconductor Application Note 1203 Mark Hartman August 2001
LM2611 demoboard working demonstration typical LM2611 converter layout. This application note contains information about board. datasheet more information LM2611 topology.
allows simple feedback negative output voltage. demoboard assembled show small practical layout. board will operate under following conditions: 4.5V 5.5V VOUT IOUT 300mA Note: input capacitor rated 6.3V. apply greater than 5.5V without first replacing input capacitor with higher voltage rating (VIN(MAX) 14V). input voltage 2.7V, however maximum load will lower than
General Description
LM2611 typically used inverting converter applications. converter offers advantages input output ripple current ability step step down magnitude input voltage.
20023101
FIGURE
TABLE Bill Materials Component CBYP CCUK COUT RFB1 RFB2 22µH 22µH 29.4k 10.0k 0.1µF 2.2µF 22µF/6.3V 22µF/6.3V Value Description Bypass Capacitor Capacitor Feedforward Capacitor Input Capacitor Output Capacitor Scottky Diode Input Inductor Output Inductor Feedback Resistor Feedback Resistor Model Number VJ0805Y104KXAAT (Vishay) EMK316BJ225ML (Taiyo Yuden) VJ0805Y102KXAAT (Vishay) LMK325BJ226MM (Taiyo Yuden) LMK325BJ226MM (Taiyo Yuden) MBRM120LT3 (Motorola) CR32-220 (Sumida) CR32-220 (Sumida) CRCW08052492FRT1 (Vishay) CRCW08051002FRT1 (Vishay)
AN-1203
2002 National Semiconductor Corporation
AN200231
www.national.com
LM2611 Demoboard
20023102
FIGURE LM2611 Demoboard Layer Layout
20023103
FIGURE LM2611 Demoboard Bottom Layer Layout
LIFE SUPPORT POLICY NATIONAL'S PRODUCTS AUTHORIZED CRITICAL COMPONENTS LIFE SUPPORT DEVICES SYSTEMS WITHOUT EXPRESS WRITTEN APPROVAL PRESIDENT GENERAL COUNSEL NATIONAL SEMICONDUCTOR CORPORATION. used herein: Life support devices systems devices systems which, intended surgical implant into body, support sustain life, whose failure perform when properly used accordance with instructions provided labeling, reasonably expected result significant injury user. critical component component life support device system whose failure perform reasonably expected cause failure life support device system, affect safety effectiveness.
AN-1203
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National does assume responsibility circuitry described, circuit patent licenses implied National reserves right time without notice change said circuitry specifications.

LM2611 Demoboard National Semiconductor Application Note 1203 Mar

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