可提供此产品的更新版本
功能与比较器件相同但引脚有所不同。
LM34919C-Q1
- AEC-Q100 qualified (Tj = –40°C to 125°C)
- Maximum Switching Frequency: 2.6 MHz
- Input Voltage Range: 4.5 V to 50 V
- Integrated N-Channel buck switch
- Integrated Start-Up Regulator
- No Loop Compensation Required
- Ultra-Fast Transient Response
- Operating Frequency Remains Constant with
Load Current and Input Voltage - Adjustable Output Voltage
- Power Good Output
- Enable Input
- Valley Current Limit at 0.64 A Typical
- Precision Internal Voltage Reference
- Low IQ Shutdown (<10 µA)
- Highly Efficient Operation
- Thermal Shutdown
- 12-Bump 2 mm × 2 mm DSBGA and 12-pin 4
mm × 4 mm WSON Packages
The LM34919C Step Down Switching Regulator features all of the functions needed to implement a low-cost, efficient, buck bias regulator capable of supplying 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available in DSBGA and WSON packages. The constant on-time feedback regulation scheme requires no loop compensation, results in fast load transient response, and simplifies circuit implementation. The operating frequency remains constant with line and load variations due to the inverse relationship between the input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to constant current mode when current limit is detected, reducing the frequency and output voltage, without the use of foldback. Additional features include: Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter.
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 | LM34919C-Q1 Ultra Small 50V, 600mA Const On-Time Buck Switchg Reg 数据表 (Rev. A) | 2013-12-12 |
设计与开发
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| WSON (DNT) | 12 | Ultra Librarian |
| DSBGA (YZR) | 12 | Ultra Librarian |
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