Analog Devices Inc. ADP1765 Low Noise, CMOS Linear Regulators

Analog Devices Inc. ADP1765 Regulators are low noise, low dropout (LDO) CMOS linear regulators. ADP1765 Regulators operate from a single input supply with an input voltage as low as 1.10V. The regulators do not require an external bias supply to increase efficiency and deliver up to a 5A output current. The small package size and low 59mV dropout voltage at a 5A load allow the ADP1765 to operate in a minimal PCB area without compromising performance. Optimized for stable operation with small 22μF ceramic output capacitors, the ADP1765 Regulators achieve optimal transient performance. Analog Devices ADP1765 Regulators have an ultra-low 2μVrms noise rating and ±1.5% fixed output voltage accuracy over line, load, and temperature. Thermal overload and short-circuit protection circuits prevent damage in adverse conditions.


  • 5A maximum output current
  • Low input voltage supply range
  • VIN = 1.10V to 1.98V, no external bias supply required
  • 0.55V to 1.5V fixed output voltage range
  • 0.5V to 1.5V adjustable output voltage range
  • Ultra-low noise: 2μVrms, 100Hz to 100kHz
  • Noise spectral density:
    • 5nV/√Hz @ 10kHz
    • 4nV/√Hz @ 100kHz
  • 59mV typical @ 5A load dropout voltage
  • 5mA typical @ no load operating supply current
  • ±1.5% fixed output voltage accuracy over line, load, and temperature
  • Excellent power supply rejection ratio (PSRR) performance
    • 61dB typical at 10 kHz @ 5A load
    • 43dB typical at 100kHz @ 5A load
  • Excellent load/line transient response
  • Soft start to reduce inrush current
  • Optimized for small 22μF ceramic capacitors
  • Current-limit and thermal overload protection
  • Power-good indicator
  • Precision enable
  • 16-lead, 3mm x 3mm LFCSP package


  • Regulation of Noise-Sensitive Applications
    • Radio Frequency (RF) transceivers
    • Analog-to-Digital Converter (ADC) and digital-to-analog converter (DAC) circuits
    • Phase-Locked Loops (PLLs)
  • Voltage Controlled Oscillators (VCOs) and clocking integrated circuits
  • Field-Programmable Gate Array (FPGA) and Digital Signal Processor (DSP) supplies
  • Medical and healthcare
  • Industrial and instrumentation

ADP1765 Typical Application Circuit Diagram

Application Circuit Diagram - Analog Devices Inc. ADP1765 Low Noise, CMOS Linear Regulators
Published: 2017-03-31 | Updated: 2022-03-11