LT1767

PRODUCTION

Monolithic 1.5A, 1.25MHz Step-Down Switching Regulators

Part Models: 20
1ku List Price: Starting From $3.70

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Overview

1.5A Switch in a Small MSOP Package
Constant 1.25MHz Switching Frequency
High Power Exposed Pad (MS8E) Package
Wide Operating Voltage Range: 3V to 25V
High Efficiency 0.22Ω Switch
1.2V Feedback Reference Voltage
Fixed Output Voltages of 1.8V, 2.5V, 3.3V, 5V
2% Overall Output Tolerance
Uses Low Profile Surface Mount Components
Low Shutdown Current: 6μA
Synchronizable to 2MHz
Current Mode Loop Control
Constant Maximum Switch Current Rating at All Duty Cycles*

The LT1767 is a 1.25MHz monolithic buck switching regulator. A high efficiency 1.5A, 0.22Ω switch is included on the die together with all the control circuitry required to complete a high frequency, current mode switching regulator. Current mode control provides fast transient response and excellent loop stability.

New design techniques achieve high efficiency at high switching frequencies over a wide operating range. A low dropout internal regulator maintains consistent performance over a wide range of inputs from 24V systems to Li-Ion batteries. An operating supply current of 1mA improves efficiency, especially at lower output currents. Shutdown reduces quiescent current to 6μA. Maximum switch current remains constant at all duty cycles. Synchronization allows an external logic level signal to increase the internal oscillator from 1.5MHz to 2MHz.

The LT1767 is available in an 8-pin MSOP fused lead-frame package and a low thermal resistance exposed pad package. Full cycle-by-cycle current limit and thermal shutdown are provided. High frequency operation allows the reduction of input and output filtering components and permits the use of chip inductors.

Applications

DSL Modems
Portable Computers
Wall Adapters
Battery-Powered Systems
Distributed Power

Part Models: 20
1ku List Price: Starting From $3.70

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
LT1767EMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-1.8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-1.8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-2.5#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-2.5#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-3.3#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-3.3#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-5#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8-5#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-1.8#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-1.8#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-2.5#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-2.5#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-3.3#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-3.3#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-5#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1767EMS8E-5#TRPBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1767EMS8#PBF	PRODUCTION
LT1767EMS8#TRPBF	PRODUCTION
LT1767EMS8-1.8#PBF	PRODUCTION
LT1767EMS8-1.8#TRPBF	PRODUCTION
LT1767EMS8-2.5#PBF	PRODUCTION
LT1767EMS8-2.5#TRPBF	PRODUCTION
LT1767EMS8-5#PBF	PRODUCTION
LT1767EMS8-5#TRPBF	PRODUCTION
LT1767EMS8E#PBF	PRODUCTION
LT1767EMS8E#TRPBF	PRODUCTION
LT1767EMS8E-1.8#PBF	PRODUCTION
LT1767EMS8E-1.8#TRPBF	PRODUCTION
LT1767EMS8E-2.5#PBF	PRODUCTION
LT1767EMS8E-2.5#TRPBF	PRODUCTION
LT1767EMS8E-5#PBF	PRODUCTION
LT1767EMS8E-5#TRPBF	PRODUCTION
Feb 3, 2020 - 20_0128 Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0128_Form Material_Report
LT1767EMS8#PBF	PRODUCTION
LT1767EMS8#TRPBF	PRODUCTION
LT1767EMS8-1.8#PBF	PRODUCTION
LT1767EMS8-1.8#TRPBF	PRODUCTION
LT1767EMS8-2.5#PBF	PRODUCTION
LT1767EMS8-2.5#TRPBF	PRODUCTION
LT1767EMS8-3.3#PBF	PRODUCTION
LT1767EMS8-3.3#TRPBF	PRODUCTION
LT1767EMS8-5#PBF	PRODUCTION
LT1767EMS8-5#TRPBF	PRODUCTION
LT1767EMS8E#PBF	PRODUCTION
LT1767EMS8E#TRPBF	PRODUCTION
LT1767EMS8E-1.8#PBF	PRODUCTION
LT1767EMS8E-1.8#TRPBF	PRODUCTION
LT1767EMS8E-2.5#PBF	PRODUCTION
LT1767EMS8E-2.5#TRPBF	PRODUCTION
LT1767EMS8E-3.3#PBF	PRODUCTION
LT1767EMS8E-3.3#TRPBF	PRODUCTION
LT1767EMS8E-5#PBF	PRODUCTION
LT1767EMS8E-5#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1767EMS8-3.3#PBF	PRODUCTION
LT1767EMS8-3.3#TRPBF	PRODUCTION
LT1767EMS8E-3.3#PBF	PRODUCTION
LT1767EMS8E-3.3#TRPBF	PRODUCTION
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
LT1767EMS8-3.3#PBF	PRODUCTION
LT1767EMS8-3.3#TRPBF	PRODUCTION
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1767EMS8-3.3#PBF	PRODUCTION
LT1767EMS8-3.3#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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Protection Switches & Controllers 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 1

LT1767 Demo Circuit - 1.5A 1.25MHz Step-Down Regulator (4.5-18V to 3.3V @ 1A)

Models for the following parts are available in LTspice:

LT1767
LT1767-1.8
LT1767-2.5
LT1767-3.3
LT1767-5

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.