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LT3045
  • LT3045
  • LT3045
  • LT3045
  • LT3045
  • LT3045

LT3045

RECOMMENDED FOR NEW DESIGNS

20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator

Analog Devices LT3045 Product Info

10 February 2026 6

Features

  • Ultralow RMS Noise: 0.8µVRMS (10Hz to 100kHz)
  • Ultralow Spot Noise: 2nV/√Hz at 10kHz
  • Ultrahigh PSRR: 76dB at 1MHz
  • Output Current: 500mA
  • Wide Input Voltage Range: 1.8V to 20V
  • Single Capacitor Improves Noise and PSRR
  • 100µA SET Pin Current: ±1% Initial Accuracy
  • Single Resistor Programs Output Voltage
  • High Bandwidth: 1MHz
  • Programmable Current Limit
  • Low Dropout Voltage: 260mV
  • Output Voltage Range: 0V to 15V
  • Programmable Power Good
  • Fast Start-Up Capability
  • Precision Enable/UVLO
  • Parallelable for Lower Noise and Higher Current
  • See data sheet for additional features

LT3045-EP Supports Defense and Aerospace Applications (AQEC Standard)

  • Download LT3045-EP Data Sheet (pdf)
  • Military Temperature Range (–55°C to 150°C)
  • Controlled Manufacturing Baseline
  • One Assembly/Test Site
  • One Fabrication Site
  • Product Change Notification
  • Qualification Data Available on Request
  • V62/21614 Data Sheet

Part details & applications

The LT3045 is a high performance low dropout linear regulator featuring LTC’s ultralow noise and ultrahigh PSRR architecture for powering noise sensitive applications. Designed as a precision current reference followed by a high performance voltage buffer, the LT3045 can be easily paralleled to further reduce noise, increase output current and spread heat on the PCB.

The device supplies 500mA at a typical 260mV dropout voltage. Operating quiescent current is nominally 2.2mA and drops to <<1µA in shutdown. The LT3045’s wide output voltage range (0V to 15V) while maintaining unity-gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capability and programmable power good to indicate output voltage regulation.

The LT3045 is stable with a minimum 10µF ceramic output capacitor. Built-in protection includes reverse-battery protection, reverse-current protection, internal current limit with foldback and thermal limit with hysteresis. The LT3045 is available in thermally enhanced 12-Lead MSOP and 10-Lead 3mm × 3mm DFN packages.

The LT3045-EP supports defense and aerospace applications (AQEC).

VIOC Function
LT3045-1 Yes