LT3028EDHC#TRPBF

Updated: 2026-09-19

Overview

The LT3028EDHC#TRPBF is a high-performance LDO regulator from Analog Devices, optimized for applications demanding tight voltage tolerance and minimal power dissipation. Its compact DFN package makes it suitable for space-constrained designs. With an operating range of 1.22V to 20V input, it delivers up to 500mA output current while maintaining a dropout voltage as low as 300mV. This efficiency reduces heat generation, critical for sensitive electronics.

Structure and Working Principle

The device integrates a pass transistor, error amplifier, and reference voltage circuit. When input voltage fluctuates, the feedback loop adjusts the pass element to maintain a constant output. Key innovations include a PMOS pass architecture, which eliminates the need for a charge pump, and foldback current limiting for overload protection. The thermal shutdown feature activates at 125°C to prevent damage.

Key Features

Ultra-low noise (30µVRMS) suits RF and data acquisition systems. Line regulation of 0.015%/V and load regulation of 0.05%/mA ensure stability under varying conditions. The device’s wide input range accommodates battery-powered and industrial power supplies. Its 10µA quiescent current in shutdown mode enhances energy efficiency for portable applications.

Application Areas

Common uses include medical imaging equipment, where stable voltage prevents signal distortion, and IoT sensors requiring long battery life. In industrial settings, it powers PLCs and motor control circuits. Telecommunications base stations leverage its noise immunity for clean signal processing.

Maintenance and Precautions

Ensure input voltage stays within datasheet limits to avoid breakdown. For high-current applications, use a PCB with adequate copper area or heatsinks. Decoupling capacitors (1–10µF) at input/output are mandatory. Avoid reverse polarity connections, which can instantly damage the IC.

B2B Procurement Guide

Bulk purchases (reels of 2,500 units) typically reduce costs by 15–20%. Lead times vary from 6–12 weeks; plan inventory accordingly. Verify authenticity through authorized distributors like Digi-Key or Mouser to counter counterfeit risks. Request samples for thermal performance testing before large orders.