LM2742
- Input Power from 1V to 16V
- Output Voltage Adjustable down to 0.6V
- Power Good Flag, Adjustable Soft-start and Output Enable for Easy Power Sequencing
- Reference Accuracy: 1.5% (0°C–125°C)
- Current Limit Without Sense Resistor
- Soft Start
- Switching Frequency from 50 kHz to 2 MHz
- 40ns Typical Minimum On-time
- TSSOP-14 Package
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The LM2742 is a high-speed, synchronous, switching regulator controller. It is intended to control currents of 0.7A to 20A with up to 95% conversion efficiencies. Power up and down sequencing is achieved with the power-good flag, adjustable soft-start and output enable features. The LM2742 operates from a low-current 5V bias and can convert from a 1V to 16V power rail. The part utilizes a fixed-frequency, voltage-mode, PWM control architecture and the switching frequency is adjustable from 50kHz to 2MHz by setting the value of an external resistor. Current limit is achieved by monitoring the voltage drop across the on-resistance of the low-side MOSFET, which enables on-times on the order of 40ns, one of the best in the industry. The wide range of operating frequencies gives the power supply designer the flexibility to fine-tune component size, cost, noise and efficiency. The adaptive, non-overlapping MOSFET gate-drivers and high-side bootstrap structure helps to further maximize efficiency. The high-side power FET drain voltage can be from 1V to 16V and the output voltage is adjustable down to 0.6V.
技術文件
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | LM2742 N-Chan FET Synch Buck Reg Cntrlr for Low Output Voltages datasheet (Rev. C) | 2013年 3月 28日 | |
| User guide | LM2742 Buck Controller Evaluation Module User's Guide (Rev. B) | PDF | HTML | 2022年 1月 24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 | Automated Frequency Response Analyzer | 2013年 10月 9日 | ||
| Application note | AN-1603 LM274X Reference Designs (Rev. C) | 2013年 5月 1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