LT1956

PRODUCTION

High Voltage, 1.5A, 500kHz Step-Down Switching Regulators

Data Sheet Product Selection Table

Part Models: 16
1ku List Price: Starting From $4.37

Viewing:

Part Details

Wide Input Range: 5.5V to 60V
1.5A Peak Switch Current
Small 16-Pin SSOP Package or Thermally Enhanced TSSOP Package
Saturating Switch Design: 0.2Ω
Peak Switch Current Maintained Over Full Duty Cycle Range
Constant 500kHz Switching Frequency
Effective Supply Current: 2.5mA
Shutdown Current: 25µA
1.2V Feedback Reference (LT1956)
5V Fixed Output (LT1956-5)
Easily Synchronizable
Cycle-by-Cycle Current Limiting

Part Models: 16
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
LT1956EFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EFE-5#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EFE-5#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EGN-5#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956EGN-5#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IFE#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IFE#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IFE-5#PBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IFE-5#TRPBF	16-Lead TSSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IGN#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IGN#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IGN-5#PBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT1956IGN-5#TRPBF	16-Lead SSOP (Narrow 0.15 Inch)	Material Declaration Reliablity Data	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
LT1956EFE#PBF	PRODUCTION
LT1956EFE#TRPBF	PRODUCTION
LT1956EFE-5#PBF	PRODUCTION
LT1956EFE-5#TRPBF	PRODUCTION
LT1956IFE#PBF	PRODUCTION
LT1956IFE#TRPBF	PRODUCTION
LT1956IFE-5#PBF	PRODUCTION
LT1956IFE-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
LT1956EGN#PBF	PRODUCTION
LT1956EGN#TRPBF	PRODUCTION
LT1956EGN-5#PBF	PRODUCTION
LT1956EGN-5#TRPBF	PRODUCTION
LT1956IGN#PBF	PRODUCTION
LT1956IGN#TRPBF	PRODUCTION
LT1956IGN-5#PBF	PRODUCTION
LT1956IGN-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
LT1956EGN#PBF	PRODUCTION
LT1956EGN#TRPBF	PRODUCTION
LT1956EGN-5#PBF	PRODUCTION
LT1956EGN-5#TRPBF	PRODUCTION
LT1956IGN#PBF	PRODUCTION
LT1956IGN#TRPBF	PRODUCTION
LT1956IGN-5#PBF	PRODUCTION
LT1956IGN-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
LT1956EGN#PBF	PRODUCTION
LT1956EGN#TRPBF	PRODUCTION
LT1956EGN-5#PBF	PRODUCTION
LT1956EGN-5#TRPBF	PRODUCTION
LT1956IGN#PBF	PRODUCTION
LT1956IGN#TRPBF	PRODUCTION
LT1956IGN-5#PBF	PRODUCTION
LT1956IGN-5#TRPBF	PRODUCTION

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

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2974	RECOMMENDED FOR NEW DESIGNS	4-Channel PMBus Power System Manager Featuring Accurate Output Current Measurement
Dual-Supply Monitors 1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Silicon Oscillators 1
LTC6909	PRODUCTION	1 to 8 Output, Multiphase Silicon Oscillator with Spread Spectrum Modulation
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363	RECOMMENDED FOR NEW DESIGNS	High Voltage Surge Stopper with Current Limit

Tools & Simulations

LTspice 1

LT1956 - Step-Down (Buck) Regulators

Models for the following parts are available in LTspice:

LT1956
LT1956-5

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.

Evaluation Kits

LT1956 Signal Chain Evaluation Board | 60V/1.5A Buck Converter

Buy Now View Details

Product Details

Demonstration circuit SCP-LT1956-BEVALZ is a 48V, 1A load current, monolithic step-down DC/DC switching converter with a wide input range for applications which require higher input voltage.

Like all boards in the Signal Chain Power series, this board is designed to be easily plugged into other SCP boards to form a complete signal chain power system, enabling fast evaluation of low power signal chains. To evaluate this board, some universal SCP hardware is required, namely:

SCP-INPUT-EVALZ
SCP-OUTPUT-EVALZ
SCP-FILTER-EVALZ
SCP-THRUBRD-EVALZ

SCP-1X2BKOUT-EVALZ
SCP-1X5BKOUT-EVALZ
SCP-5X1-EVALZ

To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design.

Note that the Demo Manual does not cover details important to the operation and configuration regarding the LT1956. Please refer to the LT1956 data sheet for a complete description of the part.

Resources

SCP-LT1956-BEVALZ - Demo Manual (Rev.0)
2.29 M

SCP-LT1956-BEVALZ - Design Files
4.11 M

SCP-LT1956-BEVALZ - Schematic
95.75 K

LT1956 Signal Chain Evaluation Board | 60V/1.5A Inverting Buck Converter

Buy Now View Details

Product Details

Demonstration circuit SCP-LT1956-IEVALZ is a 48V, 1.5A buck regulator configured as an inverting buck topology for positive to negative DC voltage conversion. This board has ample current output to drive multiple signal chains.

SCP-INPUT-EVALZ
SCP-OUTPUT-EVALZ
SCP-1X5BKOUT-EVALZ
SCP-THRUBRD-EVALZ

SCP-FILTER-EVALZ
SCP-1X2BKOUT-EVALZ
SCP-5X1-EVALZ

To properly evaluate SCP series demo boards, you will need the SCP Configurator companion software. SCP Configurator can help you choose the right board and topology for your design.

Note that this Demo Manual does not cover details important to the operation and configuration regarding the LT1956. Please refer to the LT1956 datasheet for a complete description of the part.