LT1946

PRODUCTION

1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start

Part Models: 4
1ku List Price: Starting From $2.13

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Overview

1.5A, 36V Internal Switch
1.2MHz Switching Frequency
Integrated Soft-Start Function
Output Voltage Up to 34V

Low V_CESAT Switch: 300mV at 1.5A (Typ)
8V at 430mA from a 3.3V Input
Small 8-Lead MSOP Package

The LT1946 is a fixed frequency step-up DC/DC converter containing an internal 1.5A, 36V switch. Capable of generating 8V at 430mA from a 3.3V input, the LT1946 is ideal for large TFT-LCD panel power supplies. The LT1946 switches at 1.2MHz, 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 1.2mm high.


	Switching Frequency
LT1946	1.2MHz
LT1946A	2.7MHz

Applications

TFT-LCD Bias Supplies
GPS Receivers
DSL Modems
Local Power Supplies

Part Models: 4
1ku List Price: Starting From $2.13

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
LT1946EMS8#PBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1946EMS8#TRPBF	8-Lead MSOP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1946EMS8E#PBF	8-Lead MSOP w/ EP	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
LT1946EMS8E#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
LT1946EMS8#PBF	PRODUCTION
LT1946EMS8#TRPBF	PRODUCTION
LT1946EMS8E#PBF	PRODUCTION
LT1946EMS8E#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
LT1946EMS8#PBF	PRODUCTION
LT1946EMS8#TRPBF	PRODUCTION
LT1946EMS8E#PBF	PRODUCTION
LT1946EMS8E#TRPBF	PRODUCTION

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

Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

LT1946
LT1946A

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

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 Details

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

DC459A - Demo Manual
9/24/2009

DC459A - Schematic
9/24/2009

DC459A - Design File
9/24/2009

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Overview

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Technical Articles 1