TPS54521
- Integrated 57mΩ / 50mΩ MOSFETs
- Split Power Rail: 1.6V to 17V on PVIN
- 200kHz to 900kHz Switching Frequency
- Synchronizes to External Clock
- 0.8V Voltage Reference
- Low 2µA Shutdown Quiescent Current
- Hiccup Overcurrent Protection
- Monotonic Start-Up into Prebiased Outputs
- –40°C to 125°C
Operating Junction Temperature Range - Pin-to-Pin Compatible with the TPS54620
- Adjustable Slow Start/Power Sequencing
- Power Good Output for Undervoltage and
Overvoltage Monitoring - Adjustable Input Undervoltage Lockout
- Supported by SwitcherPro Software Tool
- APPLICATIONS
- Flat Panel Digital TVs
- Set Top Boxes, Personal Video Recorders
- Net Books
- High Density 3.3V/5V Power Distribution
from 12 V Bus
The TPS54521 is a full featured 17V, 5A synchronous step down converter which is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing the inductor’s footprint.
The output voltage startup ramp is controlled by the SS/TR pin which allows operation as either a stand alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.
Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54521 is available in a 14 pin, 3.5mm × 3.5mm QFN, thermally enhanced package.
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 | 17V Input, 5A Output, Synchronous Step Down Switcher With Integrated FET 数据表 (Rev. C) | 2013-8-28 | |||
| 应用手册 | Designing Type III Compensation for Current Mode Step-Down Converters (Rev. A) | 2010-9-15 |
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）。
TPS54521EVM-607 — 用于 TPS54521 同步降压稳压器的评估模块
TPS54620DESIGN-CALC — TPS54620 and TPS54XXX Current-Mode Step-Down Converter Design Calculator
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VQFN (RHL) | 14 | Ultra Librarian |
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