LM8850
- 6µA typ. Quiescent Current
- VOUT = 3.6V to 5.7V (max VO = 5.7V)
- Operates from a Single Lithium Ion Cell (2.3V to 5.5V)
- 8 User-selectable Output Voltages via I2C
- High-speed 3.4 MHz I2C-compatible Interface
- Up to 1.0A Maximum Load Current Capability
- 4 Levels of Current Limiting
- Auto-mode Operation and Forced PWM
- 2.5 MHz Switching Drequency (typ.)
- ±2.5% DC Output Voltage Precision
- 1.0 µH Inductor (2520 Case Size)
- 4.7 µF Input and Output Capacitors (0603 case size)
- PGOOD Signal
- True Shutdown Isolation
- Output Over-voltage Protection
- Internal Active Voltage Balancing for Supercapacitors
- DSBGA 9-bump Package
- (1.58 mm x 1.62 mm x 0.35 mm)(0.5 mm pitch)
All trademarks are the property of their respective owners.
LM8850 is a step-up DC-DC converter optimized for use with a supercapacitor to protect a battery from power surges and enable new high power applications in mobile device architectures. The device creates an ideal rail from 3.6V to 5.7V boosting from a single Li-Ion cell with an input voltage range of 2.3V to 5.5V; Target VOUT must be at least 10% higher than VIN.
An I2C interface controlling multiple output voltage settings, input current limits, and load currents up to 1A provides superior user flexibility. The LM8850 operates in Auto mode, where the converter is in PFM mode at light loads and switches to PWM mode at heavy loads. Hysteretic PFM extends the battery life by reduction of the quiescent current to 6µA (typ.) during light load and standby conditions. Synchronous operation provides true shutdown isolation and improves its efficiency at medium-to-full load conditions.
High-switching frequency enables smaller passive components. Internal compensation is used for a broader range of inductor and output capacitor values to meet system demand and achieve small system solution size.
LM8850 is available in a 9-bump ultra-thin DSBGA package. Only four external surface-mount components, a 1.0 µH inductor, a 4.7 µF for input capacitor, 4.7 µF for output capacitor and 0.05F-1.0F supercapacitor for energy storage are required.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | High-Performance, Step-Up DC-DC Converter for High-Power Apps in Mobile Devices 数据表 (Rev. C) | 2013年 5月 3日 | |||
白皮书 | The Forgotten Converter | 2015年 6月 15日 | ||||
用户指南 | AN-2119 LM8850 Evaluation Board AN- (Rev. A) | 2013年 5月 3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 |
---|---|---|
DSBGA (YPD) | 9 | 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