CONFIDENTIAL ADVANCE INFORMATION ES9311Q Dual, Ultra-Low Noise +3.3V Regulator Datasheet Analog Reinvented The ES9311Q Dual, Ultra-Low Noise +3.3V Regulator is the industrys highest-performance, ultra-low noise regulator optimized to supply the reference voltages for ESS 32-Bit SABRE DACs. Audio DACs require a very low-noise reference voltage to achieve high dynamic range (DNR). The ES9311s output noise is typically under 1Vrms from 100Hz to 100kHz, and less than 1.3Vrms from 10Hz to 100kHz. The temperature coefficient of each voltage output is typically 50ppm/C. The dual regulator replaces three active devices and several discrete components used previously to produce a high-performance, low-noise regulator. The ES9311Q enables ESS Flagship 8-Channel DAC, the ES9038PRO, to achieve its full 140dB DNR and is an ideal low-noise regulator for use with all ESS 32-Bit SABRE DACs. The ES9311Q provides several unique features not available in commodity regulators: the two outputs require no decoupling capacitors, remote load sensing ensures output voltage accuracy right at the load, there are two output enable inputs, the outputs have a soft-start function, plus power-good, over-temperature warning, and over-temperature shutdown outputs. The ES9311Q Dual, Ultra-Low Noise +3.3V Regulator is available in a 30-pin, 3mm x 5mm QFN package. FEATURE BENEFIT o Dual +3.3V outputs with 300mA total load o Dual regulator minimizes board space requirements o < 1Vrms output noise (100Hz to 100kHz) o Low noise is required to achieve high converter DNR o Operation from +3.5V to +5.5V o Wide supply range operation o Excellent line and load regulation o Maintains accurate Vout with line/load variations o Remote sensing for each output o Enables excellent load regulation, typically 16mV/A o Five enable inputs and four status outputs o Provides design flexibility and host communications o Over-current & over-temperature protection o Protects regulator against system fault conditions o 3.5mA total quiescent current and 57A typ. o Suitable for USB and battery powered designs standby current (both supplies disabled) o 30-QFN package, 3mm x 5mm o Minimizes PCB footprint ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA. Tel (408) 643-8800 Fax (408) 643-8801 CONFIDENTIAL ADVANCE INFORMATION Rev. 0.51 May 31, 2016 ES9311Q Dual, Ultra-Low Noise +3.3V Regulator PIN LAYOUT ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA. Tel (408) 643-8800 Fax (408) 643-8801 2