LT80605

RECOMMENDED FOR NEW DESIGNS

3V to 65V, 5.5A Synchronous Step-Down Silent Switcher with 9μA Quiescent Current

Data Sheet (Rev. SpA) Product Selection Table
Viewing:

Overview

  • Silent Switcher® Architecture, Ultralow EMI Emissions
  • High Efficiency at High Frequency
    • Up to 94.5% at 400kHz, 24VIN to 5VOUT
    • Up to 93% at 1MHz, 24VIN to 5VOUT
  • Pin Selectable Adjustable, Fixed 3.3V and 5V Output
  • Ultralow Quiescent Current Burst Mode Operation
    • 9μA IQ Regulating 24VIN to 5VOUT
  • On-the-Fly Mode Change Among Burst, Pulse Skip and Forced Continuous Mode
  • Burst and Pulse Skipping Modes to Enable Enhanced Light-Load Efficiency
  • Built-in Output-Voltage Monitoring and Die Temperature Monitoring with PG/TJ
  • 99% Duty-Cycle Operation
  • 200kHz to 3MHz Adjustable Switching Frequency with External Clock Synchronization
  • 70V Transient-Input Tolerant
  • Internal Compensation
  • Programmable Soft-Start and Tracking
  • Built-in Hiccup Mode Overload Protection;
  • Safely Tolerates Inductor Saturation in Overload
  • Small 17-Lead 3mm × 4mm QFN
LT80605
3V to 65V, 5.5A Synchronous Step-Down Silent Switcher with 9μA Quiescent Current
LT80605 Typical Application Efficiency LT80605 Chip Illustration LT80605 Typical Application
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 1

Request an NDA

Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA).

Request an NDA
Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LT80605
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
EVAL-LT80605

Evaluates: LT80605 in 5V Output-Voltage Application

Buy Now View Details

Features and Benefits

  • Silent Switcher® Architecture, Ultralow EMI Emissions
  • Input Voltage Range up to 65V
  • 400kHz Switching Frequency
  • High 93% Efficiency (VIN = 24V, IOUT = 5.5A)
  • 9μA IQ Regulating 24VIN to 5VOUT
  • On-the-Fly Mode Change Between Burst, Pulse Skip, and FCM
  • 99% Duty-Cycle Operation
  • 0.75μA Shutdown Current
  • Bias Bootstrap Input for Improved Efficiency
  • Burst and Pulse Skipping Modes to Enable Enhanced Light-Load Efficiency
  • Programmable Soft-Start and Tracking
  • Built-in Output-Voltage Monitoring and DieTemperature Monitoring with PG/TJ
  • Overtemperature and Overcurrent Protection
  • External Clock Synchronization.
  • Proven PCB Layout
  • Fully Assembled and Tested
  • Complies with CISPR 25 Conducted and Radiated Emissions

Product Details

The LT80605EVKIT# (EV kit) is a proven 5V design to evaluate the LT80605 synchronous step-down Silent Switcher®. The EV kit is designed for a 5V output. The wide input range up to 65V allows a variety of input sources, such as automotive batteries and industrial supplies. The LT80605 is a compact, ultralow EMI emission, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 9μA of quiescent current when the output is regulated at 5V. Top and bottom power switches, compensation components, and other necessary circuits inside the LT80605 minimize external components and simplify design.

The application circuit demonstrated in the evaluation board is suitable for a wide range of automotive, telecom, industrial, and other applications.

The LT80605 data sheet gives a complete description of the part, operation, and application information. Consult the data sheet in conjunction with this demo manual. Design files for this circuit board are available at www.analog.com.
EVAL-LT80605
Evaluates: LT80605 in 5V Output-Voltage Application
EVAL-LT80605 Board Photo Angle View EVAL-LT80605 Board Photo Top View EVAL-LT80605 Board Photo Bottom View

Latest Discussions

No discussions on LT80605 yet. Have something to say?

Start a Discussion on EngineerZone®

Recently Viewed