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The RTQ8825 is a dual output voltage rail 3+2-phase controller: a 3/2/1/0 phase synchronous buck controller, the rail A and a 2/1/0 phase synchronous buck controller, the rail B. The RTQ8825 adopts G-NAVP<sup>TM</sup> (Green Native AVP) which is Richtek&prime;s proprietary topology derived from finite DC gain of EA amplifier with current mode control, making it easy to set the droop to support all CPU/Microprocessor requirements of AVP (Adaptive Voltage Positioning). Based on the G-NAVP<sup>TM</sup> topology, the RTQ8825 features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RTQ8825 supports VID on-the-fly function with four different slew rates via PMBus command setting. The DAC converts the VOUT_COMMAND code ranging from 0.25V to 1.516V with 1.953mV per step. The RTQ8825 integrates a high accuracy ADC for platform and function settings, such as SPS type, PMBus address, boot voltage and load-line. The RTQ8825 provides reset Vout function, Vout to be set to the VBOOT value while RESET# pin is asserted low. The RTQ8825 provides VR_Ready and thermal indicators. It also features complete fault protection functions including over-voltage (OV), under-voltage (UV), slow over-current (SLOW_OC), fast over-current (Fast_OC), over-temperature (OT) and under-voltage lockout (UVLO). The RTQ8825 more supports several functions which can be set by I2C/PMBus interface.
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  • 由3/2/1/0 相(A 组)和 2/1/0 相(B 组)PWM 控制器构成
  • G-NAVP™ 控制架构
  • 输出电压范围:0.25V~1.516V
  • 内建线性稳压器为 Dr.MOS 提供 3.3V PWM 信号
  • 引脚选择 VBOOT 电压, 27 选一
  • 支持电流模式或电压模式的电流检测
  • 增益可控的数字式电流平衡技术实现热均衡
  • 输出电压差分检测实现高精度输出
  • 支持输出预偏置的启动过程
  • 引脚可选使能负载线功能
  • 支持从任意输出电压返回到 VBOOT 电压
  • 兼容 PMBus v1.3 的串行接口
    ►引脚设定地址,16 选 1
    ►兼容 1.8V 和 3.3V 逻辑电位
    ►SMBALERT#
    ►用户配置信息存储于非易失存储器内
    ►可程控的上电/断电时长
    ►对输出电压、电流和温度进行监控
    ►可选择因故障而关机后进入锁定或自动回到工作状态
    ►拥有众多故障检测及保护能力
    ►VIN/VCC 欠压保护
    ►输出快/慢过流保护
    ►过热警告和保护
    ►VR_Ready 与 VR_Hot# 指示
  • 48 引脚 WQFN 封装
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网络设备 电信、数据通信及服务器系统 DSP、ASIC 及 FPGA 等负载点电源
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