LT3507AEFE#PBF

LT®3507A is a triple, current mode, DC/DC converter with internal power switches and a low dropout regulator. The switching converter is step-down converter capable of generating one 2.7A output and two 1.8A outputs. The 2.7A output runs with opposite phase to the other two converters, reducing input ripple current. This 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. The high switching frequency allows the use of small inductors and capacitors resulting in a very small triple output supply. The constant switching frequency, combined with low impedance ceramic capacitors, results in low, predictable output ripple. Frequency foldback and thermal shutdown provide protection against fault conditions. Typical applications are automotive, industrial supplies, distributed power regulation, DSP power.

• Minimum operating voltage is 3.8V typical (internal UVLO on VIN1)
• 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
• User programmable overvoltage and undervoltage lockouts
• Bias quiescent current is 5mA (not switching, VBIAS=3.3V)
• Switching frequency is 1.1MHz (RT=40.2k)
• 38-lead plastic TSSOP package
• Temperature rating range from –40°C to 125°C

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party