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RT6263 是一款简单易用的 3A 同步降压 DC-DC 转换器,输入电压范围为 4.5V 至 17V。产品内置高精度基准电压,并集成低导通电阻(RDS(ON))功率 MOSFET,可提供优异的转换效率。 RT6263 采用先进固定导通时间控制(Advanced Constant On-Time,ACOT®)架构,仅需少量外围元件即可实现超快速瞬态响应,并能够在输入电压、负载及输出电压变化范围内保持接近固定的开关频率。RT6263A 采用自动省电模式(PSM),可在轻载条件下保持高效率运行;RT6263B 则采用强制 PWM 模式(Forced PWM),有助于满足严格的输出电压稳压精度要求。 RT6263 可同时检测高侧与低侧 MOSFET 电流,提供可靠的过电流保护(OCP)。产品具备逐周期限流保护(Cycle-by-Cycle Current Limit Protection),可防止因输出短路、过电流或电感饱和等异常情况造成器件损坏。通过在外部 SS 引脚连接电容,可实现可编程软启动功能,以控制启动期间的浪涌电流。 此外,产品还集成输入欠压锁定保护(UVLO)、输出欠压保护(UVP)及过温保护(OTP),确保在各种工作条件下均能安全稳定运行。 建议结温范围为 -40°C 至 125°C。
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<div class="spec-list"><ul class="lv1"><li>3A Converter Integrated 66mΩ and 36mΩ FETs </li><li>Input Supply Voltage Range: 4.5V to 17V </li><li>Output Voltage Range: 0.765V to 7V </li><li>Advanced Constant On-Time (ACOT<sup>®</sup>) Control <ul class="lv2"> <li></li><li>Ultrafast Transient Response </li><li>Optimized for Low-ESR Ceramic Output Capacitors </li></ul> </li><li>High Accuracy Feedback Reference Voltage: Typ. ± 1% </li><li>Optional for Operation Modes: <ul class="lv2"> <li></li><li>RT6263A: Power Saving Mode (PSM) </li><li>RT6263B: Forced PWM Mode </li></ul> </li><li>Fixed Switching Frequency: 650kHz </li><li>Enable Control and Externally Adjustable Soft-Start </li><li>Input Undervoltage Lockout (UVLO) </li><li>Protection Function <ul class="lv2"> <li></li><li>Output Undervoltage Protection (UVP) with Hiccup Mode </li><li>High-/Low-side MOSFET OCP and OTP Function </li></ul> </li><li>Power Good Indication </li></ul></div>
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<div class="spec-list"><ul class="lv1"><li>Set-Top Boxes </li><li>LCD TVs </li><li>Home Networking Devices </li><li>Surveillance </li><li>General Purpose </li></ul></div>
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