LM3269
- Operates From a Single Li-Ion Cell: 2.7 V to 5.5 V
- Adjustable Output Voltage: 0.6 V to 4.2 V
- Automatic PFM or PWM Mode Change
- 750-mA Maximum Load Capability for
VBATT ≥ 3 V, VOUT = 3.8 V - 2.4-MHz (typical) Switching Frequency
- Seamless Buck-Boost Mode Transition
- Fast Output Voltage Transition: 1.4 V to 3 V
in 10 µs - High-Efficiency: 95% typical at VBATT = 3.7 V,
VOUT = 3.3 V, at 300 mA - Input Overcurrent Limit
- Internal Compensation
The LM3269 is buck-boost DC-DC converter designed to generate output voltages above or below a given input voltage and is particularly suitable for portable applications powered by a single-cell Li-ion battery.
The LM3269 operates at a 2.4-MHz typical switching frequency in full synchronous operation and provides seamless transitions between buck and boost operating regimes. The LM3269 operates in energy-saving Pulse Frequency Modulation (PFM) mode for increased efficiencies and current savings during low-power RF transmission modes.
The power converter topology needs only one inductor and two capacitors. A unique internal power switch topology enables high overall efficiency.
The LM3269 is internally compensated for buck and boost modes of operation, thus providing an optimal transient response.
When considering using the LM3269 in a system design, please review the layout instructions at the end of this document.
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 | LM3269 Seamless-Transition Buck-Boost Converter for 3G and 4G RF Power Amplifiers 数据表 (Rev. D) | PDF | HTML | 2015-4-14 | ||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | HS Load/Line Transient Jigs and App Rpt for Testing POL Regulators | 2013-4-30 | ||||
| 用户指南 | LM3269 Evaluation Board | 2013-2-28 |
设计与开发
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 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| DSBGA (YZR) | 12 | Ultra Librarian |