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The RTQ8826 is a 6/5/4/3/2/1 phase synchronous buck controller. The RTQ8826 adopts G-NAVP<sup>TM</sup> (Green Native AVP), which is Richtekâ²s 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 RTQ8826 features a new generation of quick response mechanism (Adaptive Quick Response, AQR) to optimize AVP performance during load transient and reduce output capacitors. The RTQ8826 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 RTQ8826 integrates a high accuracy ADC for platform and function settings, such as SPS type, PMBus address, boot voltage and load-line. The RTQ8826 provides reset Vout function, Vout to be set to the VBOOT value while the RESET# pin is asserted low. The RTQ8826 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 RTQ8826 supports several functions which can be set by I2C/PMBus interface.
RTQ8826 Typical Circuit
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<div class="spec-list"><ul class="lv1"><li>6/5/4/3/2/1 Phase PWM Controller </li><li>G-NAVP<sup>TM</sup> (Green Native Adaptive Voltage Positioning) Topology </li><li>Output Voltage Ranges from 0.25V to 1.516V </li><li>Embedded LDO for Dr.MOS 3.3V PWM Level </li><li>Pin Programmable 27 VBOOT Voltages </li><li>Current Sensing by Either Current Type or Voltage Type SPS </li><li>Digital Current Balancing with Programmable Gain for Thermal Balancing </li><li>Differential Output Voltage Sense for High Output Accuracy </li><li>Supports Start-Up Into Pre-Bias Voltage </li><li>Pin Selection for Enabling Load-Line Function </li><li>Supports Returning to VBOOT from Existing Voltage or from 0V </li><li>PMBus v1.3 Compliant Serial Interface <ul class="lv2"> <li></li><li>Pin Selectable 16 Addresses </li><li>1.8V and 3.3V Logic Level Compliant </li><li>SMBALERT# </li><li>Internal Non-Volatile Memory (NVM) to Store Custom Configurations </li><li>Programmable Power Up/Down Timing </li><li>Monitoring for V<sub>OUT</sub>, I<sub>OUT</sub> and Temperature </li><li>Selectable Latch or Autonomous Recovery After Shutdown Due to Fault </li><li>Extensive Fault Detection and Protection Capability </li><li>VIN & VCC Input Pins UVLO </li><li>Averaged Output SLOW/FAST_OC Protection </li><li>Output OV & UV Protection </li><li>Output Temperature Warning & Protection </li><li>Indicator for VR_Ready & VR_Hot# </li></ul> </li><li>Small 48-Lead WQFN Package </li></ul></div>
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RTQ8826 Ordering Information
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<div class="spec-list"><ul class="lv1"><li>Networking system </li><li>Telecom, Datacom and Server system </li><li>Point-of-load power supply (DSP, ASIC, FPGA) </li></ul></div>
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