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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.