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RT6338E/EH 系列是高效率同步降壓 DC-DC 轉換器，具備 500kHz 偽恆定切換頻率，並可提供高達 8A 的輸出電流。RT6338E/EH 可在 4.5V 至 23V 輸入電壓下運作。RT6338E/EH 的輸出電壓固定為 3.36V 輸出電壓。<br /><br />RT6338E/EH 採用 Advanced Constant On-Time (ACOT<sup>®</sup>) 控制架構，可提供超快速暫態響應，並進一步減少外部元件數量。在穩態下，ACOT<sup>®</sup> 可在輸入電壓、負載與輸出電壓範圍內以近乎恆定的切換頻率運作，並使 EMI 濾波器設計更加容易。<br /><br />透過設定 EN/MODE 腳位的電壓，RT6338E/EH 可在輕載時以二極體模擬模式 (DEM) 或超音波模式 (USM) 運作。USM 可維持運作頻率高於 25kHz，進而消除聲學噪音。在 DEM 中，RT6338E/EH 可提供最佳輕載效率，並透過展頻功能改善聲學噪音。<br /><br />RT6338E/EH 提供 PGOOD 指示器，便於系統時序控制。此元件亦整合完整保護功能，包括逐週期電流限制、OVP、UVP、輸入 UVLO 與 OTP。<br /><br />上述所有功能皆整合於 UQFN-23L 3x3 (FC) 封裝中。
RT6338E/RT6338EH 電路圖
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<div class="spec-list"><ul class="lv1"><li>Input Voltage Range <ul class="lv2"> <li></li><li>RT6338E/EH: 4.5V to 23V </li></ul> </li><li>Output Voltage <ul class="lv2"> <li></li><li>RT6338E/EH: 3.36V </li></ul> </li><li>8A Continuous Output Current </li><li>Stable with POSCAP and MLCC Capacitor </li><li>Fast Transient Response </li><li>Diode Emulation Mode (DEM) for Power Saving </li><li>Ultrasonic Mode (USM) for Avoiding Acoustic Noise </li><li>Pseudo Constant Switching Frequency 500kHz in CCM </li><li>Internal Power MOSFET Switch 26mΩ (high-side) and 14mΩ (low-side) </li><li>LDO <ul class="lv2"> <li></li><li>RT6338E/EH: 3.3V/100mA </li></ul> </li><li>Overcurrent Limit <ul class="lv2"> <li></li><li>RT6338E/EH: 12A </li></ul> </li><li>Output Under-/Overvoltage Protection (UVP/OVP) <ul class="lv2"> <li></li><li>RT6338E: Latched Mode UVP/OVP </li><li>RT6338EH: Hiccup Mode UVP and Non-Latched Mode OVP </li></ul> </li><li>Input Undervoltage Lockout (UVLO) </li><li>Over-Temperature Protection (OTP) <ul class="lv2"> <li></li><li>RT6338E: Latched Mode OTP </li><li>RT6338EH: Non-Latched Mode OTP </li></ul> </li></ul></div>
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RT6338E/RT6338EH 訂購資訊
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<div class="spec-list"><ul class="lv1"><li>Laptop Computers </li><li>Tablet PCs </li><li>Networking Systems </li><li>Servers </li><li>Personal Video Recorders </li><li>Flat Panel Television and Monitors </li><li>Distributed Power Systems </li></ul></div>
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