US ESS Power Management IC (PMIC) - ES9311Q

Power Management IC - The ES9311Q dual ultra-low noise +3.3V regulator is an industry high-performance, ultra-low noise regulator that provides reference voltage for ESS 32-bit Sabre DACs. Audio DACs require a very low noise reference voltage to achieve high dynamic range (DNR). The output noise of the ES9311 is typically below 1µVrms between 100Hz and 100kHz, and less than 1.3µVrms between 10Hz and 100kHz. The temperature coefficient of each voltage output is typically 50ppm/°C. The dual regulator replaces three active devices and several discrete components previously used to produce a high-performance, low-noise regulator. The ES9311Q enables ESS's flagship 8-channel DAC, the ES9038PRO, to achieve its full 140dB DNR, making it an ideal low-noise regulator for use with all ESS 32-bit Sabre DACs.

The ES9311Q offers unique features not found in commodity regulators: two outputs do not require decoupling capacitors, remote load sensing ensures output voltage accuracy under load, two output enable inputs, outputs have soft-start function, plus power-good, overtemperature warning, and overtemperature shutdown outputs.

The ES9311Q dual ultra-low noise +3.3V regulator is available in a 30-pin, 3mm x 5mm QFN package.

I.Features of Power Management IC (PMIC) - ES9311Q:

Dual +3.3V output, total load of 300mA
<1µVrms output noise (100Hz to 100kHz)
Operates from +3.5V to +5.5V
Excellent line and load regulation
Remote sensing for each output
Five enable inputs and four status outputs
Overcurrent and overtemperature protection
Total quiescent current 3.5mA, 57μA typ. standby current (both supplies disabled)
30-QFN package, 3mm x 5mm

II.Applications of Power Management IC (PMIC) - ES9311Q:

High-resolution audio (HRA) music players and converters

Analog converters

Smartphones

Headphone amplifiers