LM27342
- Space-Saving, 3 mm × 3 mm 10-Pin WSON and MSOP-PowerPAD Packages
- Wide Input Voltage Range: 3 V to 20 V
- Wide Output Voltage Range: 1 V to 18 V
- LM27341 Delivers 1.5-A Maximum Output Current
- LM27342 Delivers 2-A Maximum Output Current
- High Switching Frequency: 2 MHz
- Frequency Synchronization:
1 MHz < fSW < 2.35 MHz - 150-mΩ NMOS Switch With Internal Bootstrap Supply
- 70-nA Shutdown Current
- Internal Voltage Reference Accuracy of 1%
- Peak Current-Mode, PWM Operation
- Thermal Shutdown
- LM27341-Q1 and LM27342-Q1 are AEC-Q100 Grade 1 Qualified and Manufactured on an Automotive Grade Flow
The LM2734x and LM2734x-Q1 regulators are monolithic, high-frequency, PWM step-down DC-DC converters in 10-pin WSON and 10-pin MSOP-PowerPAD packages. They contain all the active functions to provide local DC-DC conversion with fast transient response and accurate regulation in the smallest possible PCB area.
With a minimum of external components, the LM2734x and LM2734x-Q1 are easy to use. The ability to drive 1.5-A or 2-A loads respectively, with an internal 150-mΩ NMOS switch results in the best power density available. The world-class control circuitry allows for on-times as low as 65 ns, thus supporting exceptionally high frequency conversion. Switching frequency is internally set to 2 MHz and synchronizable from 1 to 2.35 MHz, which allows the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is very high, efficiencies up to 90% are easy to achieve. External shutdown is included, which features an ultra-low shutdown current of 70 nA. The LM2734x and LM2734x-Q1 use peak current-mode control and internal compensation to provide high-performance regulation over a wide range of operating conditions. Additional features include internal soft-start circuitry to reduce inrush current, pulse-by-pulse current limit, thermal shutdown, and output overvoltage protection.
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技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM2734x and LM2734x-Q1 2-MHz, 1.5-A or 2-A, Wide Input Range, Step-Down, DC-DC Regulator With Frequency Synchronization 数据表 (Rev. F) | PDF | HTML | 2016-9-12 | ||
| 应用手册 | AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (Rev. C) | 2013-4-23 | ||||
| 应用手册 | AN-1973 Benefits and Challenges of High-Frequency Regulators (Rev. A) | 2013-4-23 | ||||
| 应用手册 | Application Note 1187 Leadless Leadframe Package (LLP) (cn) | 2011-11-1 | ||||
| 应用手册 | A Guide to Board Layout for Best Thermal Resistance for Exposed Packages (cn) | 2006-9-7 | ||||
| 应用手册 | AN-1229 SIMPLE SWITCHER PCB Layout Guidelines (cn) | 2004-5-1 | ||||
| 应用手册 | Application Note 1197 Selecting Inductors for Buck Converters (cn) | 2004-5-1 |
设计与开发
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LM27342MYEVAL — 具有频率同步功能的 LM27342MY（10 引脚 eMSOP）2MHz 2A 宽输入降压稳压器 EVM
The LM27342 demonstration board is designed to provide the power supply design engineer with a fully functional regulator design which can be synchronized to an external clock between 1000 kHz and 2350 kHz. The evaluation board provides a 3.3V output with a 2A current capability. The wide input (...)
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| WSON (DSC) | 10 | Ultra Librarian |
| HVSSOP (DGQ) | 10 | Ultra Librarian |