LM3000
- VIN Range FROM 3.3V to 18.5V
- Output Voltage From 0.6V to 80% of VIN
- Remote Differential Output Voltage Sensing
- 1% Accuracy at FB Pin
- Interleaved Operation Reduces Input Capacitors
- Frequency Sync/Adjust From 200 kHz to 1.5 MHz
- Startup With Pre-Bias Load
- Independent Power Good, Enable, Soft-Start and Track
- Programmable Current Limit Without External Sense Resistor
- Hiccup Mode Short Circuit Protection
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The LM3000 is a dual output synchronous buck controller which is designed to convert input voltages ranging from 3.3V to 18.5V down to output voltages as low as 0.6V. The two outputs switch at a constant programmable frequency of 200 kHz to 1.5 MHz, with the second output 180 degrees out of phase from the first to minimize the input filter requirements. The switching frequency can also be phase locked to an external frequency. A CLKOUT provides an external clock 90 degrees out of phase with the main clock so that a second chip can be run out of phase with the main chip. The emulated current-mode control utilizes bottom side FET sensing to provide fast transient response and current limit without the need for external current sense resistors or RC networks. Separate Enable, Soft-Start and Track pins allow each output to be controlled independently to provide maximum flexibility in designing system power sequencing.
The LM3000 has a full range of protection features which include input under-voltage lock-out (UVLO), power good (PGOOD) signals for each output, over-voltage crowbar and hiccup mode during short circuit events.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | LM3000 Dual Synchronous Emulated Current-Mode Controller 数据表 (Rev. B) | 2013年 4月 3日 | |||
用户指南 | LM3000 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 8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 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
封装 | 引脚 | 下载 |
---|---|---|
WQFN (RTV) | 32 | 查看选项 |
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