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RT5788 是一款簡單、易於使用的 4A 同步降壓 DC-DC 轉換器，輸入電源電壓範圍為 2.5V 至 6V。此元件內建精準的 0.6V (±1.5%) 參考電壓，並可在 100% 工作週期下作為極低壓差穩壓器運作。RT5788 整合低 R<sub>DS(ON)</sub> 功率 MOSFET 以達成高效率，並提供 TSOT-23-8 (FC) 封裝。 RT5788 採用先進固定導通時間（Advanced Constant On-Time，ACOT<sup>®</sup>）控制架構，可在少量外部元件下提供超快速暫態響應，並在線路、負載與輸出電壓範圍內以接近固定的開關頻率運作。RT5788 設計為以 1.5MHz 固定頻率運作。RT5788 會在輕載時自動進入省電模式（PSM）運作，以維持高效率。RT5788 則在整個負載範圍內以 Forced PWM 運作，有助於滿足嚴格的電壓調節精度需求。 RT5788 偵測兩個 FET 的電流，以提供強健的過電流保護。其可防止元件在輸出短路、過電流或電感飽和時遭受災難性損壞。獨立啟用控制輸入與電源良好指示可提供彈性的系統電源時序控制；內建軟啟動功能可防止啟動期間的湧入電流。此元件亦包含輸入欠壓鎖定、輸出欠壓保護與過溫保護（熱關斷），以在所有操作條件下提供安全且平穩的運作。
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<div class="spec-list"><ul class="lv1"><li>4A Converter With Built-In 22mΩ/20mΩ Low R<sub>DS(ON)</sub> Power FETs </li><li>Input Supply Voltage Range : 2.5V to 6V </li><li>Output Voltage Range : 0.6V to 6V </li><li>Operates Up to 100% Duty Cycle </li><li>Advanced Constant On-Time (ACOT®) Control <ul class="lv2"> <li></li><li>Ultrafast Transient Response </li><li>No Needs for External Compensations </li><li>Optimized for Low-ESR Ceramic Output Capacitors </li></ul> </li><li>0.6V ±1.5% High-Accuracy Feedback Reference Voltage </li><li>35mA Operation Quiescent Current (RT5788A) </li><li>Robust Over-Current Protection for Both FETs </li><li>Optional for Operation Modes : <ul class="lv2"> <li></li><li>Power Saving Mode (PSM) (RT5788A) </li><li>Forced PWM Mode (RT5788B) </li></ul> </li><li>Fixed Switching Frequency : 1.5MHz </li><li>Monotonic Start-Up for Pre-Biased Output </li><li>Individual Enable Control Input </li><li>Power Good Indicator </li><li>Built-In Internally Fixed Soft-Start (Typ. 1.5ms) </li><li>100% Duty Cycle Mode </li><li>Internal Output Discharge </li><li>Input Under-Voltage Lockout (UVLO) </li><li>Output Under-Voltage Protection (UVP) with Hiccup Mode </li><li>Over-Temperature Protection </li><li>Available in TSOT-23-8 (FC) Package </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>WLAN ASIC Power / Storage (SSD and HDD) </li><li>Mobile Phones and Handheld Devices </li><li>STB, Cable Modem, and xDSL Platforms </li><li>General Purpose for POL LV Buck Converter </li></ul></div>
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