LT80605

Name: LT80605
Brand: Analog Devices
Price: 3.53 USD
Availability: InStock

RECOMMENDED FOR NEW DESIGNS

3V to 65V, 4A/5.5A Synchronous Step-Down Silent Switcher with 8μA Quiescent Current

Data Sheet (Rev. 1) Product Selection Table

Part Models: 8
1ku List Price: Starting From $3.53

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Overview

Silent Switcher^® Architecture

Low EMI Emissions
Spread-Spectrum Frequency Modulation

High Efficiency at High Frequency

Up to 94.5% at 400kHz, 24V_IN to 5V_OUT
Up to 93% at 1MHz, 24V_IN to 5V_OUT

Pin Selectable Adjustable, Fixed 3.3V and 5V Output
Low Quiescent Current Burst Mode Operation

8μA IQ Regulating 24V_IN to 5V_OUT

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/T_J
200kHz to 3MHz Adjustable Switching Frequency with External Clock Synchronization
80V Transient-Input Tolerant (LT8060xAHV)
Programmable Soft-Start and Tracking
Small 17-Lead 3mm × 4mm QFN

Part Models: 8
1ku List Price: Starting From $3.53

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT80605AAFO+	F173B4F+1F	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFO+T	F173B4F+1F	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFOA/VY+	F173B4FY+1	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFOA/VY+T	F173B4FY+1	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFOAH/VY+	F173B4FY+1	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFOAH/VY+T	F173B4FY+1	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFOH+	F173B4F+1F	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys
LT80605AAFOH+T	F173B4F+1F	Material Declaration Reliability Report Package Resources	Ultra Librarian SamacSys

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT80605
LT80605A
LT80605AHV

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

Evaluates: LT80605 in 5V Output-Voltage Application

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Features and Benefits

Silent Switcher^® Architecture, Ultralow EMI Emissions
Input Voltage Range up to 65V
400kHz Switching Frequency
High 93% Efficiency (V_IN = 24V, I_OUT = 5.5A)
9μA IQ Regulating 24V_IN to 5V_OUT
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.

Resources

EVAL-LT80605 User Guide: Evaluates: LT80605 in 5V Output-Voltage Application (Rev.SpB)
4/30/2025

EVAL-LT80605 Gerber Files
4/30/2025

Evaluates: LT80605A, LT80604A in 5V Output-Voltage Application

Buy Now View Details

Features and Benefits

Silent Switcher Architecture, Ultra-low EMI Emissions
Input Voltage Range up to 65V
400kHz Switching Frequency
High 93% Efficiency (V_IN = 24V, I_OUT = 5.5A)
8μA I_Q Regulating 24V_IN to 5V_OUT
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 Die Temperature 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 LT80605AEVKIT# (EV kit) is a proven 5V design to evaluate the LT80605A 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 LT80605A is a compact, ultra-low EMI emission, high efficiency, high-speed synchronous monolithic step-down switching regulator that consumes only 8μA of quiescent current when the output is regulated at 5V. Top and bottom power switches, compensation components, and other necessary circuits inside the LT80605A minimize external components and simplify design. The EV kit can also evaluate the LT80605A, LT80604A, LT80605AHV, and LT80604AHV. Refer to the IC data sheet guidelines when modifying the schematic to achieve optimal performance.

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

The LT80605A data sheet gives a complete description of the part, operation, and application information. Consult the data sheet in conjunction with this demo manual.