LT1956
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LT1956

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

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LTspice LT1956 - Step-Down (Buck) Regulators Download 1.91 KB
Part Models 16
1ku List Price Starting From $4.37
Features
  • 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
Additional Details
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The LT1956/LT1956-5 are 500kHz monolithic buck switching regulators with an input voltage capability 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 architecture provides fast transient response and good 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 580kHz to 700kHz with a logic level input.

The LT1956/LT1956-5 are available in fused-lead 16-pin SSOP and thermally enhanced TSSOP packages.

Applications

  • High Voltage, Industrial and Automotive
  • Portable Computers
  • Battery-Powered Systems
  • Battery Chargers
  • Distributed Power Systems
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Documentation View All Documentation
LTspice LT1956 - Step-Down (Buck) Regulators Download 1.91 KB
Part Models 16
1ku List Price Starting From $4.37
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LT1956

Documentation

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Data Sheet

1

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UPDATED 08/23/2007
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LT1956: High Voltage, 1.5A, 500kHz Step-Down Switching Regulators Data Sheet

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User Guide

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UPDATED 02/01/2021
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SCP-LT1956-IEVALZ - Demo Manual (Rev.0) redirect icon

2.31 M

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UPDATED 09/24/2009
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DC423B - Demo Manual redirect icon

507.00K

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Reliability Data

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UPDATED 03/23/2018
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R365 Reliability Data redirect icon

19.13 K

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Design Note

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UPDATED 08/01/2003
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Design Note 318: Efficient Dual Polarity Output Converter Fits into Tight Spaces redirect icon

Technical Articles

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UPDATED 08/01/2002
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60V/3A Step-Down DC/DC Converter Maintains High Efficiency over a Wide Range of Input Voltages redirect icon

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Documentation

Technical Documents 6
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Data Sheet 1

LT1956: High Voltage, 1.5A, 500kHz Step-Down Switching Regulators Data Sheet

Reliability Data 1

R365 Reliability Data

User Guide 2

SCP-LT1956-IEVALZ - Demo Manual (Rev.0)
DC423B - Demo Manual

Design Note 1

Design Note 318: Efficient Dual Polarity Output Converter Fits into Tight Spaces

Technical Articles 1

60V/3A Step-Down DC/DC Converter Maintains High Efficiency over a Wide Range of Input Voltages

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 external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956EFE#TRPBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956EFE-5#PBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956EFE-5#TRPBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956EGN#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956EGN#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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LT1956EGN-5#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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LT1956EGN-5#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IFE#PBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IFE#TRPBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IFE-5#PBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IFE-5#TRPBF 16-Lead TSSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IGN#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IGN#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IGN-5#PBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1956IGN-5#TRPBF 16-Lead SSOP (Narrow 0.15 Inch) external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Apr 6, 2022

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT1956EFE#PBF

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LT1956EFE#TRPBF

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LT1956EFE-5#TRPBF

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(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

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LT1956EGN#TRPBF

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LT1956EGN-5#PBF

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LT1956EGN-5#TRPBF

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LT1956IGN#PBF

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Epoxy Change from Henkel 8290 to 8290A for GN Package

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LT1956EGN#TRPBF

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Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

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Laser Top Mark for ETSSOP and TSSOP Packages Assembled in ADPG [PNG] and UTL

LT1956EFE#PBF

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LT1956EFE#TRPBF

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LT1956EFE-5#PBF

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LT1956EFE-5#TRPBF

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Oct 3, 2024

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(QSOP/SSOP PKG) Migrating Bottom Trace Code Marking to Top Side Laser Marking

LT1956EGN#PBF

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LT1956EGN#TRPBF

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LT1956EGN-5#PBF

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LT1956EGN-5#TRPBF

PRODUCTION

LT1956IGN#PBF

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LT1956IGN#TRPBF

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Material_Report

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Oct 11, 2022

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Epoxy Change from Henkel 8290 to 8290A for GN Package

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LT1956EGN-5#PBF

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LT1956EGN-5#TRPBF

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LT1956IGN-5#TRPBF

PRODUCTION

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PCN22_0235_Form

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Material_Report

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pdf

Qualification Results Summary

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Delta Qualification Matrix

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Apr 6, 2022

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Laser Top Mark for 16QSOP Assembled in ADPG [PNG]

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

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PCN22_0066_Form

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Material_Report

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Evaluation Kits 3

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SCP-LT1956-BEVALZ

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

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SCP-LT1956-BEVALZ

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

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SCP-LT1956-BEVALZ
LT1956 Signal Chain Evaluation Board | 60V/1.5A Buck Converter
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Product Detail

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

pdf icon

PDF

SCP-LT1956-BEVALZ - Demo Manual (Rev.0) Download

2.29 M

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ZIP

SCP-LT1956-BEVALZ - Design Files Download

4.11 M

pdf icon

PDF

SCP-LT1956-BEVALZ - Schematic Download

95.75 K

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SCP-LT1956-IEVALZ

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

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SCP-LT1956-IEVALZ

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

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Download

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SCP-LT1956-IEVALZ
LT1956 Signal Chain Evaluation Board | 60V/1.5A Inverting Buck Converter
Buy Now View Details

Product Detail

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.

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-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.

Resources

pdf icon

PDF

SCP-LT1956-IEVALZ - Demo Manual (Rev.0) Download

2.31 M

pdf icon

ZIP

SCP-LT1956-IEVALZ - Design Files Download

1.85 M

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PDF

SCP-LT1956-IEVALZ - Schematic Download

41.28 K

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DC423B

LT1956EFE | 1A, 500kHz High Voltage Buck Converter, VIN = 7V - 25V, VOUT = 5V @ 1A

Evaluation Kits3

evaluation kit item images

SCP-LT1956-BEVALZ

LT1956 Signal Chain Evaluation Board | 60V/1.5A Buck Converter
evaluation kit item images

SCP-LT1956-IEVALZ

LT1956 Signal Chain Evaluation Board | 60V/1.5A Inverting Buck Converter
evaluation kit item images

DC423B

LT1956EFE | 1A, 500kHz High Voltage Buck Converter, VIN = 7V - 25V, VOUT = 5V @ 1A

Tools & Simulations 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LT1956 - Step-Down (Buck) Regulators Download

1.91 K

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