The TPS54821 in thermally enhanced 3.5 mm × 3.5 mm QFN package is a full featured 17 V, 8 A synchronous step down converter which is optimized for small designs through high efficiency and integrating the 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. There is also a low-side sinking current limit which turns off the low-side MOSFET to prevent excessive reverse current. Hiccup protection will be triggered if the overcurrent condition has persisted for longer than the preset time. Thermal hiccup protection disables the device when the die temperature exceeds the thermal shutdown temperature and enables the part again after the built-in thermal shutdown hiccup time.
| 類型 | 標題 | 日期 | ||
|---|---|---|---|---|
| * | Data sheet | TPS54821 4.5 V to 17 V Input, 8 A Synchronous Step Down Converter With Hiccup datasheet (Rev. B) | PDF | HTML | 2016年 2月 10日 |
| Application note | Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part I: Filter Design for Out | PDF | HTML | 2024年 2月 27日 | |
| Application note | Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part II: Hybrid Sense Network | PDF | HTML | 2024年 2月 27日 | |
| EVM User's guide | TPS54821 Step-Down Converter Evaluation Module User's Guide (Rev. A) | PDF | HTML | 2021年 8月 20日 | |
| Application note | How to Design a Simple and Highly Integrated Battery Testing System (Rev. B) | 2019年 4月 2日 | ||
| Selection guide | Power Management Guide 2018 (Rev. R) | 2018年 6月 25日 | ||
| More literature | Common Mistakes in DC/DC Converters and How to Fix Them | 2018年 2月 14日 |
如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RHL) | 14 | Ultra Librarian |