LT1946A
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LT1946A

2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start

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LTspice LT1946A - Step-Up (Boost) Regulators Download 1.74 KB
Part Models 2
1ku List Price Starting From $2.13
Features
  • 1.5A, 36V Internal Switch
  • 2.7MHz Switching Frequency
  • Integrated Soft-Start Function
  • Adjustable Output from VIN to 35V
  • Low VCESAT Switch: 300mV at 1.5A (Typical)
  • 12V at 430mA from a 5V Input
  • Small Thermally Enhanced 8-Lead MSOP Package
Additional Details
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The LT1946A is a fixed frequency step-up DC/DC converter containing an internal 1.5A, 36V switch. Capable of generating 12V at 430mA from a 5V input, the LT1946A is ideal for powering large TFT-LCD panels. The LT1946A switches at 2.7MHz, allowing the use of tiny, low profile inductors and low value ceramic capacitors. Loop compensation can be either internal or external, giving the user flexibility in setting loop compensation and allowing optimized transient response with low ESR ceramic output capacitors. Soft-start is controlled with an external capacitor which determines the input current ramp rate during start up. The 8-lead MSOP package and high switching frequency ensure a low profile overall solution less than 1.1mm high.

  Switching Frequency
LT1946 1.2MHz
LT1946A 2.7MHz

Applications

  • TFT-LCD Bias Supplies
  • GPS Receivers
  • DSL Modems
  • Local Power Supply
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Documentation View All Documentation
LTspice LT1946A - Step-Up (Boost) Regulators Download 1.74 KB
Part Models 2
1ku List Price Starting From $2.13
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LT1946A

Documentation

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Data Sheet

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UPDATED 08/30/2007
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LT1946A: 2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start Data Sheet

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User Guide

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UPDATED 09/24/2009
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DC459A - Demo Manual redirect icon

48.00K

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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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Technical Articles

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UPDATED 03/01/2002
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1.2MHz and 2.7MHz, 1.5A Boost Converters Drive Big LCDs, LEDs redirect icon

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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
LT1946AEMS8E#PBF 8-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link
LT1946AEMS8E#TRPBF 8-Lead MSOP w/ EP external-link
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  • Material Declaration external-link
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  • Reliablity Data external-link

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Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT1946AEMS8E#PBF

PRODUCTION

LT1946AEMS8E#TRPBF

PRODUCTION

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PCN24_0003_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT1946AEMS8E#PBF

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LT1946AEMS8E#TRPBF

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PCN20_0128_Form

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Material_Report

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Product Lifecycle

PCN

Jun 5, 2024

- 24_0003

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT1946AEMS8E#PBF

PRODUCTION

LT1946AEMS8E#TRPBF

PRODUCTION

pdf

PCN24_0003_Form

external-icon

xls

Material_Report

Download

pdf

Qualification Results Summary

external-icon

xlsm

Delta Qualification Matrix

Download
Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT1946AEMS8E#PBF

PRODUCTION

LT1946AEMS8E#TRPBF

PRODUCTION

pdf

PCN20_0128_Form

external-icon

xls

Material_Report

Download

Software & Part Ecosystem

Evaluation Kits 1

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DC459A

LT1946EMS8 LT1946AEMS8E | 12VOUT Boost Converter, +5VIN, +12VOUT/400mA and Triple Output TFT LCD Bias Supply, 3.3VIN, VOUT = +23V/5mA, +8V/350mA, -8V/10mA

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DC459A

LT1946EMS8 LT1946AEMS8E | 12VOUT Boost Converter, +5VIN, +12VOUT/400mA and Triple Output TFT LCD Bias Supply, 3.3VIN, VOUT = +23V/5mA, +8V/350mA, -8V/10mA

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DC459A
LT1946EMS8 LT1946AEMS8E | 12VOUT Boost Converter, +5VIN, +12VOUT/400mA and Triple Output TFT LCD Bias Supply, 3.3VIN, VOUT = +23V/5mA, +8V/350mA, -8V/10mA
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Product Detail

DC459A Demo Board for:
LT1946 1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
LT1946A 2.7MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start


 


Resources

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DC459A - Schematic Download

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DC459A - Design File Download

559.00K

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PDF

DC459A - Demo Manual Download

48.00K

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Evaluation Kits1

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DC459A

LT1946EMS8 LT1946AEMS8E | 12VOUT Boost Converter, +5VIN, +12VOUT/400mA and Triple Output TFT LCD Bias Supply, 3.3VIN, VOUT = +23V/5mA, +8V/350mA, -8V/10mA

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.

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LT1946A - Step-Up (Boost) Regulators Download

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