Power Management Switching Regulator LCD/CCD/OLED Bias

LTC1697 - High Efficiency Low Power 1W CCFL Switching Regulator

Features

  • Operates from Single Li-Ion Battery
  • 2.8V to 5.5V Input Voltage Range
  • Very Low Shutdown Current: <2µA
  • Synchronous Buck Architecture for High Efficiency
  • PWM Dimming Frequency Adjustable with a Single Capacitor
  • Accurate Lamp Current Maximizes Lamp Lifetime
  • Fixed Frequency Operation at 300kHz
  • Internal or External PWM Dimming
  • Small 10-Pin MSOP Package

Typical Application

LTC1697 Typical Application
LTC1697 Typical Application

Description

The LTC1697 is designed to control a single 1W cold cathode fluorescent lamp (CCFL). An internal PWM dimming system maximizes efficiency and dimming range. Accurate lamp currents can be set with a single external resistor.

The LTC1697 includes a synchronous current mode PWM controller with internal 1A MOSFET switches. It contains a 300kHz oscillator, 0.8V reference, and internal current sense. It operates from a 2.8V to 5.5V input voltage. The LTC1697 also has a thermal limit and a shutdown that reduces supply current to <2µA.

The LTC1697 is available in the MSOP-10 package.

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
LTC1697EMS#PBF MS-10 MS E 05-08-1661 Yes
LTC1697EMS#TRPBF MS-10 MS E 05-08-1661 Yes


LTC1697 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
LTC1697EMS#PBF MS-10 E $2.79 $1.95 Yes
LTC1697EMS#TRPBF MS-10 E $2.00 Yes
Buy Now • Request Samples
* 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
DC510A LTC1697EMS | 1 Watt CCFL Controller, Vin = 2.7V - 5.5V, VDim = 1V(0%) - 2V(100%) $150.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • PDAs
  • Handheld Computers
  • Portable Instruments
  • Handheld GPS with Map Display
  • Handheld TV/Video Monitor

People Who Viewed This Product Also Viewed

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LTC1697

Technical Support