LT3500 Datasheet | Linear Technology

.. Features n n n n n n n n n n LT3500 Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller DESCRIPTION The LT®3500 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 40V makes the LT3500 suitable for regulating power from a wide variety of sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters. Resistor-programmable 250k Hz to 2.2MHz frequency range and synchronization capability enable optimization between efficiency and external ponent size. Cycleby-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking. The LT3500 contains an internal NPN transistor with feedback control which can be configured as a linear regulator or as a linear regulator controller. The LT3500’s low current shutdown mode (<12μA) enables easy power management in battery-powered systems. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Wide Input Range: 3V to 36V Operating, 40V Maximum Short-Circuit Protected Over Full Input Range 2A Output Current Capability Adjustable/Synchronizable Fixed Frequency Operation from 250k Hz to 2.2MHz Soft-Start/Tracking Capability Output Adjustable Down to 0.8V Adjustable Linear Regulator/Driver with 13m A Output Capability Power Good parator with plimentary Outputs Low Shutdown Current: 12μA Thermally Enhanced 3mm × 3mm DFN or 16-Pin MSOP Package APPLICATIONS n n n n Automotive Battery Regulation Industrial Control Wall Transformer Regulation Distributed Power Regulation TYPICAL APPLICATION Dual Step-Down Converters VIN 6V TO 36V 2.2μF VIN LT3500 SW SHDN SS 0.47μF FB PG PG RT/SYNC LDRV VC LFB 40.2k 8.06k 22μF 3500 TA01a Switching...