DESCRIPTION
●The LT®3507 is a triple, current mode, DC/DC converter with internal power switches and a low dropout regulator. The switching converters are step-down converters capable of generating one 2.4A output and two 1.5A outputs. All three converters are synchronized to a single oscillator. The 2.4A output runs with opposite phase to the other two converters, reducing input ripple current. Each regulator has independent shutdown and soft-start circuits, and generates a power good signal when its output is in regulation, easing power supply sequencing and interfacing with microcontrollers and DSPs.
●FEATURES
●■ Wide Input Range: 4V to 36V
●■ One 2.4A and Two 1.5A Output Switching Regulators with Internal Power Switches
●■ Low Dropout Linear Regulator with External Transistor
●■ Antiphase Switching Reduces Ripple
●■ Independent Run, Tracking/Soft-Start, and Power Good Indicators Ease Supply Sequencing
●■ Uses Small Inductors and Ceramic Capacitors
●■ Adjustable, 250kHz to 2.5MHz Switching Frequency, Synchronizable Over the Full Range
●■ User Programmable Overvoltage and Undervoltage Lockouts
●■ Thermally Enhanced, 38-Lead 5mm × 7mm QFN Package
●APPLICATIONS
●■ DSL and Cable Modems
●■ Distributed Power Regulation
●■ DSP Power
●■ Automotive
