LM2743
- Power stage input voltage from 1 V to 16 V
- Control stage input voltage from 3 V to 6 V
- Output voltage adjustable down to 0.6 V
- Power-good flag and shutdown
- Output overvoltage and undervoltage detection
- ±2% Feedback voltage accuracy over temperature
- Low-side adjustable current sensing
- Adjustable soft start
- Tracking and sequencing with shutdown and soft-start pins
- Switching frequency from 50 kHz to 1 MHz
- TSSOP-14 package
- Create a custom design using the LM2743 with the WEBENCH® Power Designer
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.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM2743 2.2-V to 16-V Input, voltage mode, synchronous buck controller with tracking datasheet (Rev. I) | PDF | HTML | 2019年 2月 20日 |
| User guide | LM2744 Buck Controller Evaluation Module User's Guide (Rev. B) | PDF | HTML | 2022年 2月 23日 | |
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| Analog Design Journal | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016年 7月 21日 | ||
| Application note | AN-1603 LM274X Reference Designs (Rev. C) | 2013年 5月 1日 | ||
| EVM User's guide | AN-1356 LM2743 Evaluation Board (Rev. A) | 2013年 4月 30日 | ||
| EVM User's guide | AN-1640 LM2743-19A Demo Board (Rev. A) | 2013年 4月 26日 | ||
| Application note | Current Limit Foldback Improves Short Circuit Protection in LM274X Family (Rev. B) | 2013年 4月 23日 | ||
| Application note | Optmiz Pwr Cntrlr Dsigns thru Utiliz Freq & Sync, Ext Ref, Trking & Precis EN | 2008年 4月 24日 | ||
| Application note | Power Management Considerations for FPGAs and ASICs | 2007年 3月 22日 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| TSSOP (PW) | 14 | Ultra Librarian |
訂購與品質
- RoHS
- REACH
- 產品標記
- 鉛塗層/球物料
- MSL 等級/回焊峰值
- MTBF/FIT 估算值
- 材料內容
- 認證摘要
- 進行中持續性的可靠性監測
- 晶圓廠位置
- 組裝地點