LT1766

PRODUCTION

5.5V to 60V 1.5A, 200kHz Step-Down Switching Regulator

Part Models: 18
1ku List Price: Starting From $4.37

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Overview

Wide Input Range: 5.5V to 60V
1.5A Peak Switch Current
Constant 200kHz Switching Frequency
Saturating Switch Design: 0.2Ω
Peak Switch Current Rating Maintained Over Full Duty Cycle Range
Low Effective Supply Current: 2.5mA
Low Shutdown Current: 25μA
1.2V Feedback Reference Voltage (LT1766)
5V Fixed Output (LT1766-5)
Easily Synchronizable
Cycle-by-Cycle Current Limiting
Small 16-Pin SSOP and Thermally Enhanced TSSOP Packages

The LT1766/LT1766-5 are 200kHz monolithic buck switching regulators that accept input voltages up to 60V. A high efficiency 1.5A, 0.2Ω switch is included on the die along with all the necessary oscillator, control and logic circuitry. A current mode control architecture delivers fast transient response and excellent loop stability.

Special design techniques and a new high voltage process achieve high efficiency over a wide input range. Efficiency is maintained over a wide output current range by using the output to bias the circuitry and by utilizing a supply boost capacitor to saturate the power switch. Patented circuitry maintains peak switch current over the full duty cycle range. A shutdown pin reduces supply current to 25μA and the device can be externally synchronized from 228kHz to 700kHz with logic-level inputs.

The LT1766/LT1766-5 are available in a 16-pin fused-lead SSOP package or a TSSOP package with exposed backside for improved thermal performance.

Applications

High Voltage, Industrial and Automotive
Portable Computers
Battery-Powered Systems
Battery Chargers
Distributed Power Systems

Part Models: 18
1ku List Price: Starting From $4.37

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
LT1766EFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EFE-5#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EFE-5#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EGN-5#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766EGN-5#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766HFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766HFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IFE-5#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IFE-5#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IGN-5#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1766IGN-5#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Apr 6, 2022 - 22_0068 Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL
		PCN22_0068_Form Material_Report Delta Qualification Matrix
LT1766EFE#PBF	PRODUCTION
LT1766EFE#TRPBF	PRODUCTION
LT1766EFE-5#PBF	PRODUCTION
LT1766EFE-5#TRPBF	PRODUCTION
LT1766HFE#PBF	PRODUCTION
LT1766HFE#TRPBF	PRODUCTION
LT1766IFE#PBF	PRODUCTION
LT1766IFE#TRPBF	PRODUCTION
LT1766IFE-5#PBF	PRODUCTION
LT1766IFE-5#TRPBF	PRODUCTION
Oct 3, 2024 - 24_0235 (QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking
		PCN24_0235_Form Material_Report Other Delta Qualification Matrix
LT1766EGN#PBF	PRODUCTION
LT1766EGN#TRPBF	PRODUCTION
LT1766EGN-5#PBF	PRODUCTION
LT1766EGN-5#TRPBF	PRODUCTION
LT1766IGN#PBF	PRODUCTION
LT1766IGN#TRPBF	PRODUCTION
LT1766IGN-5#PBF	PRODUCTION
LT1766IGN-5#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0235 Epoxy Change from Henkel 8290 to 8290A for GN Package
		PCN22_0235_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1766EGN#PBF	PRODUCTION
LT1766EGN#TRPBF	PRODUCTION
LT1766EGN-5#PBF	PRODUCTION
LT1766EGN-5#TRPBF	PRODUCTION
LT1766IGN#PBF	PRODUCTION
LT1766IGN#TRPBF	PRODUCTION
LT1766IGN-5#PBF	PRODUCTION
LT1766IGN-5#TRPBF	PRODUCTION
Apr 6, 2022 - 22_0066 Laser Top Mark for 16QSOP Assembled in ADPG [PNG]
		PCN22_0066_Form Material_Report Delta Qualification Matrix
LT1766EGN#PBF	PRODUCTION
LT1766EGN#TRPBF	PRODUCTION
LT1766EGN-5#PBF	PRODUCTION
LT1766EGN-5#TRPBF	PRODUCTION
LT1766IGN#PBF	PRODUCTION
LT1766IGN#TRPBF	PRODUCTION
LT1766IGN-5#PBF	PRODUCTION
LT1766IGN-5#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

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Power System Management (PSM) & Sequencers 1
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Protection Switches & Controllers 1
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Parts	Product Life Cycle	Description
LT8620	RECOMMENDED FOR NEW DESIGNS	65V, 2A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Tools & Simulations

LTspice 1

LT1766 Demo Circuit - High Voltage 60V 1.5A, 200kHz Step-Down Regulator (12V to 5V @ 1A)

Models for the following parts are available in LTspice:

LT1766

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.