The LM2743 is a high-speed synchronous buck regulator controller with an accurate feedback voltage accuracy of ±2%. It can provide simple down conversion to output voltages as low as 0.6 V. Though the control sections of the IC are rated for 3 V to 6 V, the driver sections are designed to accept input supply rails as high as 16 V. The use of adaptive non-overlapping MOSFET gate drivers helps avoid potential shoot-through problems while maintaining high efficiency. The IC is designed for the more cost-effective option of driving only N-channel MOSFETs in both the high-side and low-side positions. It senses the low-side switch voltage drop for providing a simple, adjustable current limit.
The fixed-frequency voltage-mode PWM control architecture is adjustable from 50 kHz to 1 MHz with one external resistor. This wide range of switching frequency gives the power supply designer the flexibility to make better tradeoffs between component size, cost and efficiency.
Features include soft start, input undervoltage lockout (UVLO) and Power Good (based on both undervoltage and overvoltage detection). In addition, the shutdown pin of the IC can be used for providing start-up delay, and the soft-start pin can be used for implementing precise tracking, for the purpose of sequencing with respect to an external rail.
| Tipo | Título | Fecha | ||
|---|---|---|---|---|
| * | Data sheet | LM2743 2.2-V to 16-V Input, voltage mode, synchronous buck controller with tracking datasheet (Rev. I) | PDF | HTML | 20 feb 2019 |
| User guide | LM2744 Buck Controller Evaluation Module User's Guide (Rev. B) | PDF | HTML | 23 feb 2022 | |
| 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 | ||
| Application note | AN-1603 LM274X Reference Designs (Rev. C) | 01 may 2013 | ||
| EVM User's guide | AN-1356 LM2743 Evaluation Board (Rev. A) | 30 abr 2013 | ||
| EVM User's guide | AN-1640 LM2743-19A Demo Board (Rev. A) | 26 abr 2013 | ||
| Application note | Current Limit Foldback Improves Short Circuit Protection in LM274X Family (Rev. B) | 23 abr 2013 | ||
| Application note | Optmiz Pwr Cntrlr Dsigns thru Utiliz Freq & Sync, Ext Ref, Trking & Precis EN | 24 abr 2008 | ||
| Application note | Power Management Considerations for FPGAs and ASICs | 22 mar 2007 |
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LM2743 N-Channel FET Synchronous Buck Regulator Controller for Conversion from 3.3V
| Paquete | Pasadores | Descargar |
|---|---|---|
| TSSOP (PW) | 14 | Ver opciones |
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