LT1946 - 1.2MHz Boost DC/DC Converter with 1.5A Switch and Soft-Start
Datasheet Documentation
Datasheet
Application Note
Reliability Data
LT Journal
cad_symbol
Overview

Features

Typical Application

LT1946 Typical Application
LT1946 Typical Application

Description

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
Packaging

MS-8

LT1946 Package Drawing
LT1946 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
(1-99)		 Price
(1k)*
LT1946AEMS8E#PBF MSOP 8 E $2.08 $1.75
LT1946AEMS8E#TRPBF MSOP 8 E $1.81
LT1946EMS8#PBF MSOP 8 E $2.08 $1.75
LT1946EMS8#TRPBF MSOP 8 E $1.81
LT1946EMS8E#PBF MSOP 8 E $2.14 $1.80
LT1946EMS8E#TRPBF MSOP 8 E $1.86
LT1946EMS8 MSOP 8 E $4.16 $3.50
LT1946EMS8#TR MSOP 8 E $3.62
LT1946AEMS8E MSOP 8 E $4.16 $3.50
LT1946AEMS8E#TR MSOP 8 E $3.62
LT1946EMS8E MSOP 8 E $4.28 $3.60
LT1946EMS8E#TR MSOP 8 E $3.72
* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.


Part Number Description Price Documentation
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 Contact Factory