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The RTQ1951 provides enterprise-level protection and high-performance monitoring for 16V to 80V systems such as 48V/54V datacenter equipment. Sub-ms response to short-circuit faults, and remote temperature sensing with adjustable thresholds allow the RTQ1951 to protect and monitor critical systems – including those with wide dynamic transient loads. Programmable independent active current limit during start-up and steady state with MOSFET-VDS-dependent timer ensures robust protection during various overcurrent scenarios while protecting MOSFET from SOA stress. Optional programmable 3-level overcurrent protection with individual digital timers avoid false trips during dynamic transient overload events while maintaining robust protection from real overload conditions. For monitoring, the RTQ1951 measures real-time power, voltage, current, temperature, and fault data, and transmits this information via an I2C/SMBus interface with PMBus compliant command structure. Precision telemetry enables intelligent power management functions, power optimization, and early fault detection. The RTQ1951 also improves system diagnostics with adjustable telemetry averaging and peak power measurement. The RTQ1951 is available in WQFN-48 (Exposed Pad) 8mm×7mm package.
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<div class="spec-list">
<ul class="lv1">
<li>VIN: 16V to 80V (100V AMR)</li>
<li>12-Bit (or 16-Bit) 1kHz ADC Telemetry (-40°C to 125°C)
<ul class="lv2">
<li>±0.4% Voltage</li>
<li>±0.85% Current</li>
<li>±1.3% Power (Energy monitoring supported)</li>
</ul>
</li>
<li>Adjustable Start-Up and Steady State Active Current Limit
<ul class="lv2">
<li>0.5mV to 55mV Overcurrent Sense Voltage in 0.5mV Increments</li>
</ul>
</li>
<li>Optional Three Levels of Overcurrent Protection with Programmable Digital Timers</li>
<li>Fast Response to Severe Overcurrent</li>
<li>FET Health Warning/Detection After PGD</li>
<li>Two Remote Temperature Sensing W/ Adjustable Warning/Shutdown Thresholds</li>
<li>PROCHOT Output (RND)</li>
<li>Programmable UV, OV Thresholds</li>
<li>PMBus Compliant Command Structure</li>
<li>-40°C < T<sub>J</sub> < 125°C Operation</li>
<li>Available in WQFN-48 8mmx7mm Package</li>
</ul>
</div>
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<div class="spec-list">
<ul class="lv1">
<li>48V/54V Servers and Network Equipment</li>
<li>Datacenter Rack Power Distribution</li>
<li>Base Station Power Distribution</li>
<li>Industrial Systems</li>
</ul>
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