Analog Devices Inc. ADP151 Ultra-low Noise Linear Regulators

Analog Devices ADP151 features ultra-low noise, low dropout (LDO) linear regulators operating from 2.2V to 5.5V. ADP151's low 140mV dropout voltage at 200mA load increases efficiency and enables operation over a wide input voltage range. The ADP151 delivers ultra-low noise performance without compromising PSRR or line and load transient performance. The ADP151 regulators use an innovative circuit topology to achieve 9μV ultra-low noise performance without the need of an additional noise bypass capacitor. ADP150's circuit topology makes the regulators ideal for noise-sensitive analog and RF applications. ADP151's low 265μA of quiescent current at 200mA load makes the ADP151 regulators suitable for battery-operated portable equipment, The ADP151 regulators also include an internal pull-down resistor on the EN input. Designed for stable operation with tiny 1μF ± 30% ceramic input and output capacitors, ADP151 regulators meet the requirements of high-performance, space-constrained applications. The ADP151 regulators are ideal for mobile phones, digital cameras & audio devices, portable & battery-powered equipment, post-DC-to-DC regulation, portable medical devices, and RF, VCO & PLL power supplies.


  • Ultralow noise: 9µ Vrms
  • No noise bypass capacitor required
  • Stable with 1µF ceramic input and output capacitors
  • Maximum output current 200mA
  • Input voltage range 2.2V to 5.5V
  • Low quiescent current
  • IGND = 10µA with 0 load
  • IGND = 265μA with 200mA load
  • Low shutdown current <1µA
  • Low dropout voltage 140mV at 200mA load
  • Initial accuracy ±1%
  • Accuracy over line, load, and temperature ±2.5%
  • 16 fixed output voltage options 1.1V to 3.3V
  • PSRR performance of 70dB at 10kHz
  • Current-limit and thermal overload protection
  • Logic controlled enable
  • Internal pull-down resistor on EN input
  • 5-lead TSOT package
  • 6-lead LFCSP package
  • 4-ball, 0.4mm pitch WLCSP


  • RF, VCO, and PLL power supplies
  • Mobile phones
  • Digital camera and audio devices
  • Portable and battery-powered equipment
  • Post DC-to-DC regulation
  • Portable medical devices
Publicado: 2016-03-31 | Actualizado: 2022-03-11