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LTC1697

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 O...

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SeekIC No. : 004401810 Detail

LTC1697: 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 ...

LTC1697 Data Sheet

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Part Number:
LTC1697
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



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


Application

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


Pinout

Connection Diagram


Specifications

VIN Voltage .................................................. 0.5V to 6V
VC, OVSEN, CDIM, RPROG, SW
   Voltages ................................... ..0.5V to (VIN + 0.3V)
SHDN, VDIM Pins ........................................... 0.5V to 6V
LAMP Pin ..................................................... 0.5V to 0.5V
Operating Temperature Range (Note 5) .....40 to 85
Storage Temperature Range ....................65 to 125
Lead Temperature (Soldering, 10 sec).................... 300


Description

The LTC®1697 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 device also has a thermal limit and a shutdown that reduces supply current to <2µA.

The LTC1697 is available in the MSOP-10 package.




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