LT1959

PRODUCTION

4.5A, 500kHz Step-Down Switching Regulator

Data Sheet Product Selection Table

Part Models: 8
1ku List Price: Starting From $5.48

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Part Details

Operates with Input as Low as 4V
Output Range Down to 1.21V
Constant 500kHz Switching Frequency
Uses All Surface Mount Components
Inductor Size Reduced to 1.8µH
Saturating Switch Design: 0.07Ω
Shutdown Current: 20µA
Easily Synchronizable
Cycle-by-Cycle Current Limiting
4.5A Switch
Current Mode Control

Part Models: 8
1ku List Price: Starting From $5.48

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
LT1959CR#PBF	7-Lead DD Pak	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959CR#TRPBF	7-Lead DD Pak	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959CS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959CS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959IR#PBF	7-Lead DD Pak	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959IR#TRPBF	7-Lead DD Pak	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959IS8#PBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1959IS8#TRPBF	8-Lead SOIC (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Aug 10, 2022 - 22_0175 Laser Top Mark Conversion for DDPAK & TO220 Packages Assembled in ADPG. Country of Origin Code [MY] To Be Incorporated On Top Mark
		PCN22_0175_Form Material_Report Delta Qualification Matrix
LT1959CR#PBF	PRODUCTION
LT1959CR#TRPBF	PRODUCTION
LT1959IR#PBF	PRODUCTION
LT1959IR#TRPBF	PRODUCTION
Oct 24, 2024 - 24_0246 Migrating Bottom Trace Code Marking to Top Side Laser Marking for SOIC_N Package
		PCN24_0246_Form Material_Report Marking Comparison Delta Qualification Matrix
LT1959CS8#PBF	PRODUCTION
LT1959CS8#TRPBF	PRODUCTION
LT1959IS8#PBF	PRODUCTION
LT1959IS8#TRPBF	PRODUCTION
Oct 12, 2022 - 22_0255 Epoxy Change from Henkel 8290 to 8290A for 8-Lead SOIC Package (PCN part 2 of 2)
		PCN22_0255_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT1959CS8#PBF	PRODUCTION
LT1959CS8#TRPBF	PRODUCTION
LT1959IS8#PBF	PRODUCTION
LT1959IS8#TRPBF	PRODUCTION
Jun 16, 2021 - 21_0026 Laser Top Mark for 8SOICN Assembled in ADPG, UTL and CRM
		PCN21_0026_Form Material_Report Delta Qualification Matrix
LT1959CS8#PBF	PRODUCTION
LT1959CS8#TRPBF	PRODUCTION
LT1959IS8#PBF	PRODUCTION
LT1959IS8#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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Digital Power System Managers 1
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Tools & Simulations

LTspice 1

LT1959 - Step-Down (Buck) Regulators

Models for the following parts are available in LTspice:

LT1959

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

LT1959CS8 | 4.5A Switch, 500kHz Step-Down Regulator, 5V to 15VIN, 1.8VOUT @ 4A

Buy Now View Details

Product Details

DC355A: Demo Board for the LT1959 4.5A, 500kHz Step-Down Switching Regulator.

Resources

DC355A - Design File
857.00K

DC355A - Schematic
105.00K

DC355A - Demo Manual
329.00K

LT1959CR | 4.5A Switch, 500kHz Step-Down Regulator, 5V to 15VIN, 1.8VOUT @ 4A

Buy Now View Details

Product Details

DC356A: Demo Board for the LT1959 4.5A, 500kHz Step-Down Switching Regulator.

Resources

DC356A - Demo Manual
329.00K

DC356A - Schematic
103.00K

DC356A - Design File
477.00K

Reference Designs

View Detailed Reference Design

Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Part Used

View Detailed Reference Design

Features and Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications