TPS54678
- Two 12-mΩ (typical) MOSFETs for high-efficiency 6-A continuous output current
- 200-kHz to 2-MHz Switching frequency
- 0.6-V ±1% Voltage reference over temperature (–40°C to 150°C)
- Synchronizes to external clock
- Start-Up with prebiased voltage
- Power good output
- Adjustable slow start and sequencing
- Cycle-by-cycle current limit and hiccup current protection
- Adjustable input voltage UVLO
- Thermally enhanced 16-pin 3-mm × 3-mm WQFN (RTE)
- Create a custom design using the TPS54678 with the WEBENCH® Power Designer
TPS54678 device is a full-featured 6-V, 6-A, synchronous step-down current mode converter with two integrated MOSFETs.
TPS54678 enables small designs by integrating the MOSFETs, implementing current mode control to reduce external component count, reducing inductor size by enabling up to 2-MHz switching frequency, and minimizing the IC footprint with a small 3-mm × 3-mm thermally enhanced WQFN package.
TPS54678 provides accurate regulation for a variety of loads with an accurate ±1% voltage reference (VREF) over temperature.
Efficiency is maximized through the integrated 12-mΩ MOSFETs. Using the enable (EN) pin, shutdown supply current is reduced by disabling the device.
The output voltage start-up ramp is controlled by the soft-start (SS) pin that can also be configured for sequencing or tracking. Monotonic start-up is achieved with prebiased voltage. Undervoltage lockout can be increased by programming the threshold with a resistor divider on the enable pin. An open-drain power good signal indicates the output is within 93% to 105% of its nominal voltage.
Cycle-by-cycle current limit, hiccup overcurrent protection and thermal shutdown protect the device during an overcurrent condition.
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 | TPS54678 2.95-V to 6-V Input, 6-A Synchronous Step-Down SWIFT™ Converter With Hiccup Current Limit datasheet (Rev. B) | PDF | HTML | 2019/5/6 | ||
| 應用說明 | Semiconductor and IC Package Thermal Metrics (Rev. D) | PDF | HTML | 2024/3/25 | |||
| 選擇指南 | Buck Converter Quick Reference Guide (Rev. B) | 2021/4/8 | ||||
| 應用說明 | Calculating Efficiency (Rev. A) | 2020/3/6 | ||||
| 應用說明 | Minimizing Output Ripple During Startup (Rev. A) | 2019/5/20 | ||||
| 選擇指南 | SWIFT DC/DC Converters Selector Guide (Rev. G) | 2019/2/6 | ||||
| 選擇指南 | Power Management Guide 2018 (Rev. R) | 2018/6/25 | ||||
| 應用說明 | Understanding Thermal Dissipation and Design of a Heatsink | 2011/5/4 |
設計與開發
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TPS54678EVM-155 — TPS54678 評估模組
PMP10900 — 具有 2 級 LC 濾波器的 3.3V 5A 降壓轉換器參考設計
PMP10900 旨在於 5V 輸入下提供 3.3V/5A 輸出。兩級 LC 濾波器用於達到輸出漣波電壓 <1mV。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| WQFN (RTE) | 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。