TPS54495
- D-CAP2 Control Mode
- Fast Transient Response
- No External Parts Required For Loop
Compensation - Compatible with Ceramic Output
Capacitors
- Wide Input Voltage Range : 4.5 V to 18 V
- Output Voltage Range: 0.76 V to 7 V
- Highly Efficient Integrated FETs Optimized
for Low Duty Cycle Applications- 90 mΩ (High Side) and 60 mΩ
(Low Side)
- 90 mΩ (High Side) and 60 mΩ
- High Initial Reference Accuracy
- Supports Constant 4 A CH1 and 2 A CH2 Load
Current - Low-Side rDS(on) Loss-Less Current
Sensing - Adjustable Soft Start
- Non-Sinking Pre-Biased Soft Start
- 700 kHz Switching Frequency
- Cycle-by-Cycle Over-Current Limit Control
- OCL/UVLO/TSD Protections
- Hiccup Timer for Overload Protection
- Adaptive Gate Drivers with Integrated
Boost PMOS Switch - OCP Constant Due To Thermally Compensated
rDS(on) with 4000ppm/°C - 16-Pin HTSSOP, 16-Pin VQFN
- Auto-Skip Eco-mode for High Efficiency at Light Load
The TPS54495 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54495 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count, and low standby current solution. The main control loops of the TPS54495 use the D-CAP2™ mode control which provides a very fast transient response with no external compensation components. The adaptive on-time control supports seamless transition between PWM mode at higher load conditions and Eco-mode™ operation at light loads. Eco-mode™ allows the TPS54495 to maintain high efficiency during lighter load conditions. The TPS54495 is able to adapt to both low equivalent series resistance (ESR) output capacitors such as POSCAP or SP-CAP, and ultra-low ESR, ceramic capacitors. The device provides convenient and efficient operation with input voltages from 4.5V to 18V.
The TPS54495 is available in a 4.4 mm × 5 mm 16-pin TSSOP (PWP) package and 4 mm x 4 mm 16-pin VQFN (RSA), and is designed to operate for an ambient temperature range from –40°C to 85°C.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | 4A/2A Dual Channel Synchronous Step-Down Switcher with Integrated FET, TPS54495 datasheet (Rev. A) | 2013/5/29 | |||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 |
設計與開發
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TIDA-00304 — 斷電保持儲能解決方案
此解決方案可為需要在斷電後短時間內以受控方式關閉的系統（例如 SSD）儲存並提供「斷電」能量。透過將保持能量儲存在高於匯流排電壓的情況下，電容量可減少高達 80%，大幅縮小解決方案尺寸並降低成本，同時提高可靠性。
通常需要使用複雜的電子電路來升壓輸入電壓，在電源故障期間將其與降壓輸入進行多工處理，並降壓至 3.3V 或 5V 供負載使用。
此參考設計在輸入端使用 TI 的 TPS25942 來控制突波，防止過電壓、欠電壓、短路，並防止儲存的能源流回短路的輸入匯流排。如果輸入電源為 5V，升壓轉換器會將電容器組充電至 12V；如果輸入電源為 12V，則充電至 18V。當 TPS25942 (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| HTSSOP (PWP) | 16 | Ultra Librarian |
| VQFN (RSA) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。