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.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM2742 N-Chan FET Synch Buck Reg Cntrlr for Low Output Voltages 数据表 (Rev. C) | 2013年 3月 28日 | |||
用户指南 | LM2742 降压控制器评估模块用户指南 (Rev. B) | PDF | HTML | 英语版 (Rev.B) | PDF | HTML | 2022年 7月 18日 | |
选择指南 | 电源管理指南 2018 (Rev. K) | 2018年 7月 31日 | ||||
选择指南 | 电源管理指南 2018 (Rev. R) | 2018年 6月 25日 | ||||
模拟设计期刊 | Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics | 2016年 7月 21日 | ||||
应用手册 | Automated Frequency Response Analyzer | 2013年 10月 9日 | ||||
应用手册 | AN-1603 LM274X Reference Designs (Rev. C) | 2013年 5月 1日 | ||||
应用手册 | Current Limit Foldback Improves Short Circuit Protection in LM274X Family (Rev. B) | 2013年 4月 23日 | ||||
应用手册 | Optmiz Pwr Cntrlr Dsigns thru Utiliz Freq & Sync, Ext Ref, Trking & Precis EN | 2008年 4月 24日 | ||||
应用手册 | Application Note 1603 LM274X Reference Designs (cn) | 2007年 12月 6日 | ||||
应用手册 | Power Management Considerations for FPGAs and ASICs | 2007年 3月 22日 | ||||
应用手册 | Current Limit Foldback Improves Short Circuit Protection in LM274X Family (cn) | 2006年 5月 25日 |
设计和开发
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封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
TSSOP (PW) | 14 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点