TPS54821
- Integrated 26 mΩ / 19 mΩ MOSFETs
- Split Power Rail: 1.6 V to 17 V on PVIN
- 200 kHz to 1.6 MHz Switching Frequency
- Synchronizes to External Clock
- 0.6V ±1% Voltage Reference Over Temperature
- Low 2 µA Shutdown Quiescent Current
- Monotonic Start-Up into Pre-biased Outputs
- Adjustable Slow Start/Power Sequencing
- Power Good Output Monitor for Undervoltage and
Overvoltage - Adjustable Input Undervoltage Lockout
- Software Tools Available
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.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | TPS54821 4.5 V to 17 V Input, 8 A Synchronous Step Down Converter With Hiccup データシート (Rev. B) | PDF | HTML | 2016/02/10 | ||
| アプリケーション・ノート | Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part I: Filter Design for Out | PDF | HTML | 2024/02/27 | |||
| アプリケーション・ノート | Peak Current Mode Converter Secondary Stage Filter Design for Low Ripple Power – Part II: Hybrid Sense Network | PDF | HTML | 2024/02/27 | |||
| アプリケーション・ノート | How to Design a Simple and Highly Integrated Battery Testing System (Rev. B) | 2019/04/02 | ||||
| セレクション・ガイド | 電源 IC セレクション・ガイド 2018 (Rev. R 翻訳版) | 英語版 (Rev.R) | 2018/09/13 | |||
| その他の技術資料 | Common Mistakes in DC/DC Converters and How to Fix Them | 2018/02/14 |
設計と開発
その他のアイテムや必要なリソースを参照するには、以下のタイトルをクリックして詳細ページをご覧ください。
TPS54821EVM-049 — Evaluation Module for TPS54821 Synchronous Step-Down SWIFT Converter
TPS54821 Unencrypted PSpice Average Model Package (Rev. A)
TPS54821 Unencrypted PSpice Transient Model Package (Rev. A)
TPS54620DESIGN-CALC — TPS54620 and TPS54XXX Current-Mode Step-Down Converter Design Calculator
PMP15043 — バッテリ テスト システム向け 6A、電流精度 0.05% 電源ソリューションのリファレンス デザイン
| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| VQFN (RHL) | 14 | Ultra Librarian |
購入と品質
推奨製品には、この TI 製品に関連するパラメータ、評価基板、またはリファレンス デザインが存在する可能性があります。