LTC3215 - 700mA Low Noise High Current LED Charge Pump _ BDTIC a Leading Distributor in China

LTC3215 - 700mA Low Noise High Current LED Charge Pump

Built-in soft-start circuitry prevents excessive inrush current during start-up. High switching frequency enables the use of small external capacitors. LED current is programmed with an external resistor. The LED is disconnected from VIN during shutdown.

An ultralow dropout current source maintains accurate LED current at very low ILED voltages. Automatic mode switching optimizes efficiency by monitoring the voltage across the LED current source and switching modes only when ILED dropout is detected. The LTC3215 is available in a low profile 3mm × 3mm 10-Lead DFN package.

Features

High Efficiency Operation: 1x, 1.5x or 2x Boost Modes with Automatic Mode Switching
Ultralow Dropout ILED Current Control
Output Current up to 700mA
Low Noise Constant Frequency Operation*
Wide VIN Range: 2.9V to 4.4V
Open/Shorted LED Protection
LED Disconnect in Shutdown
Low Shutdown Current: 2.5µA
4% LED Current Programming Accuracy
Automatic Soft-Start Limits Inrush Current
No Inductors
Tiny Application Circuit (All Components <1mm Profile)
3mm × 3mm 10-Lead DFN Package

Typical Application

Applications

LED Torch/Camera Light Supply for Cell Phones, PDAs and Digital Cameras
General Lighting and/or Flash/Strobe Applications

Packaging

Order Information

Part Number	Package	Temp	Price(1-99)	Price (1k)*
LTC3215EDD#PBF	3x3 DFN-10	E	$2.50	$1.75
LTC3215EDD#TRPBF	3x3 DFN-10	E		$1.85

Demo Boards

Part Number	Description	Price
DC871A-A	LTC3215EDD \| Low Noise, High Current LED Flash Charge Pump, VIN = 2.9V-4.4V, AOT	$100.00
DC871A-B	LTC3215EDD \| Low Noise, High Current LED Flash Charge Pump, VIN = 2.9V-4.4V, LUM	$100.00
DC871A-C	LTC3215EDD \| Low Noise, High Current LED Flash Charge Pump, VIN = 2.9V-4.4V, LUM	$100.00