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The LM3743 is a DC-DC voltage mode PWM buck controller featuring synchronous rectification at 300 kHz or 1 MHz. It can deliver current as high as 20A and step down from an input voltage between 3V and 5.5V down to a minimum output voltage of 0.8V, with a ±1.75% internal reference accuracy. The LM3743 provides a set of comprehensive fault protection features such as high-side current limit, output under-voltage protection, and low-side current limit. When any of these fault protection features are engaged, it enters a hiccup protection mode which is suitable for high reliability systems such as rack mounted servers and telecom base station subsystems. The LM3743 also employs a proprietary monolithic glitch free pre-bias start-up method suited for FPGA and ASIC logic devices. An external programmable soft-start allows for tracking and timing flexibility. The driver features 1.6Ω of pull-up resistance and 1Ω of pull-down drive resistance for high power density and very efficient power processing.
| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | LM3743 High-Perf Synch Buck Cntrler w/Compreh Fault Protect Features datasheet (Rev. E) | 04 Apr 2013 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 25 Jun 2018 | ||
| Analog Design Journal | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 21 Jul 2016 | ||
| EVM User's guide | AN-1450 LM3743 Evaluation Board (Rev. A) | 07 Mai 2013 | ||
| Application note | LM3743 Hi Perf Controller w/Comp Fault Protect Feature for Hi Reliability System (Rev. A) | 06 Mai 2013 | ||
| Application note | Power Supply Design Considerations for Modern FPGAs (Power Designer 121) | 02 Feb 2010 |
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|---|---|---|
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