LTC3450 - Triple Output Power Supply for Small TFT-LCD Displays

Features

  • Generates Three Voltages:
    5.1V at 10mA
    5V, -10V, or -15V at 500µA
    10V or 15V at 500µA
  • Better than 90% Efficiency
  • Low Output Ripple: Less than 5mVP-P
  • Complete 1mm Component Profile Solution
  • Controlled Power-Up Sequence: AVDD/VGL/VGH
  • All Outputs Disconnected and Actively Discharged in Shutdown
  • Low Noise Fixed Frequency Operation
  • Frequency Reduction Input for High Efficiency in Blank Mode
  • Ultralow Quiescent Current: 75µA (Typ) in Scan Mode
  • Available in a 3mm × 3mm 16-Pin QFN Package

Typical Application

LTC3450 Typical Application
LTC3450 Typical Application

Description

The LTC3450 is a complete power converter solution for small thin film transistor (TFT) liquid crystal display (LCD) panels. The device operates from a single Lithium-Ion cell, 2- to 3-cell alkaline input or any voltage source between 1.5V and 4.6V.

The synchronous boost converter generates a low noise, high efficiency 5.1V, 10mA supply. Internal charge pumps are used to generate 10V, 15V, and -5V, -10V or -15V. Output sequencing is controlled internally to insure proper initialization of the LCD panel.

A master shutdown input reduces quiescent current to <2µA and quickly discharges each output for rapid turn off of the LCD panel. The LTC3450 is offered in a low profile (0.75mm), 3mm × 3mm 16-pin QFN package, minimizing the solution profile and footprint.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC3450EUD#PBF 3x3 QFN-16 UD E 05-08-1691 Yes
LTC3450EUD#TRPBF 3x3 QFN-16 UD E 05-08-1691 Yes


LTC3450 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC3450EUD#PBF 3x3 QFN-16 E $3.57 $2.50 Yes
LTC3450EUD#TRPBF 3x3 QFN-16 E $2.60 Yes
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* 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
DC553A LTC3450EUD | Triple Output TFT-LCD Supply, Vin = 1.5V to 4.6V, Vout = 5.1V/10mA, 15V/500uA, -10V/500uA $309.00
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Click here to view our complete list of demo boards

Applications

  • Cellular Handsets with Color Display
  • Handheld Instruments
  • PDA

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support