• Input voltage range: −2.0 V to −5.5 V 

• Maximum output current: −300 mA 

• Fixed output voltage options: −0.5 V to 

• −4.5 V Adjustable output from −0.5 V to −VIN + 0.5 V  

• Low output noise: 4 μV rms from 100 Hz to 100 kHz  

• Noise spectral density: 20 nV/√Hz, 10 kHz to 1 MHz 

• Power supply rejection ratio (PSRR) at −300 mA load

• 75 dB typical at 10 kHz  62 dB typical at 100 kHz 40 

  dB typical at 1 MHz 

 • Low dropout voltage: −130 mV typical at IOUT = 

  −300 mA Initial output voltage accuracy (VOUT): ±0.5%

  at IOUT = −10 mA Output voltage 

  accuracy over line, load, and 

  temperature: ±2.6% Operating supply 

  current (IGND): −0.6 mA 

  typical at no load Low shutdown current: 

  −2 μA typical at VIN = −5.5 V 

• Stable with small 4.7 μF ceramic input and 

   output capacitor Positive or negative enable logic 

• Current-limit and thermal overload protection 

   8-lead, 2 mm × 2 mm LFCSP package 

• Supported by ADIsimPOWER voltage 

  regulator design tool