LT3471EDD#TRPBF

LT3471 is a dual switching regulator combines two 42V, 1.3A switches with error amplifiers that can sense to ground providing boost and inverting capability. The low VCESAT bipolar switches enable the device to deliver high current outputs in a small footprint. High inrush current at start-up is eliminated using the programmable soft-start function, where an external RC sets the current ramp rate. A constant frequency current mode PWM architecture results in low, predictable output noise that is easy to filter. It is used in application such as organic LED power supply, digital cameras, white LED power supply, cellular phones, medical diagnostic equipment, local ±5V or ±12V supply, TFT-LCD bias supply, xDSL power supply etc.

• Switching frequency is 1.2MHz typical
• Switch VCESAT is 150mV typical at (ISW = 0.5A)
• Wide input voltage range is 2.4V to 16V
• Inverting capability
• Uses tiny surface mount components
• 5V at 630mA from 3.3V input, 12V at 320mA from 5V input, -12V at 200mA from 5V input
• Low shutdown current is 1μA maximum at (VSHDN = 0.3V, VIN = 3V)
• Quiescent current is 2.5mA typical at (VSHDN = 1.8V, not switching)
• Operating temperature is -40°C to 85°C
• Package style is 10-lead plastic DFN

บันทึก

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