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LTC3218 - 400mA Single Wire Camera LED Charge Pump

Description

The LTC®3218 is a low-noise, high-current charge pump DC/DC converter capable of driving high current LEDs at up to 400mA from a 2.9V to 4.5V input.

Features

  • Low Noise Constant-Frequency Operation.
  • Multi-Mode Operation: 1x or 2x Boost Mode.
  • Automatic Mode Switching.
  • High Output Current: 150mA (Continuous), 400mA (Pulsed) From Li-Ion/Polymer Input.
  • 2-Second Flash Current Timeout for LED Protection.
  • Automatic Soft-Start.
  • Output Disconnect.
  • No Inductors.
  • 220mΩ Internal High Side Current Sense Resistor.
  • Single Resistor Programming Capability.
  • Tiny.

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Full PDF Text Transcription

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LTC3218 400mA Single Wire Camera LED Charge Pump FEATURES ■ Low Noise Constant-Frequency Operation ■ Multi-Mode Operation: 1x or 2x Boost Mode ■ Automatic Mode Switching ■ High Output Current: 150mA (Continuous), 400mA (Pulsed) From Li-Ion/Polymer Input ■ 2-Second Flash Current Timeout for LED Protection ■ Automatic Soft-Start ■ Output Disconnect ■ No Inductors ■ 220mΩ Internal High Side Current Sense Resistor ■ Single Resistor Programming Capability ■ Tiny Application Circuit (3mm × 2mm DFN Package, All Components < 1mm High) APPLICATIONS ■ LED Torch/Flash Supply for DSCs/Cellphones DESCRIPTION The LTC®3218 is a low-noise, high-current charge pump DC/DC converter capable of driving high current LEDs at up to 400mA from a 2.9V to 4.5V input.
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