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LT3477 Datasheet DC/dc Converter

Manufacturer: Linear Technology (now Analog Devices)

General Description

The LT®3477 is a current mode, 3A DC/DC step-up converter with dual rail-to-rail current sense amplifiers and an internal 3A, 42V switch.

It combines a traditional voltage feedback loop and two unique current feedback loops to operate as a constant-current, constant-voltage source.

Both current sense voltages are set at 100mV and can be adjusted independently using the IADJ1 and IADJ2 pins.

Key Features

  • nn Dual 100mV Rail-to-Rail Current Sense Amplifiers nn Wide Input Voltage Range: 2.5V to 25V nn 3A, 42V Internal Switch nn High Efficiency Power Conversion: Up to 93% nn Drives LEDs in Boost, Buck-Boost or Buck Mode nn Frequency Set by External Resistor: 200kHz to 3.5MHz nn Programmable Soft-Start nn Low VCESAT Switch: 0.3V at 2.5A nn Capable of Positive and Negative Output Voltages (Boost, Inverting, SEPIC, Flyback) nn Available in Thermally Enhanced 20-Lead (4mm × 4mm) QFN and 20-Lead TSSOP Pa.

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