The LTC1624 is a current mode switching regulator controller that drives an external N-channel power MOSFET using a fixed frequency architecture. It can be operated in all standard switching configurations including boost, step-down, inverting and SEPIC. Burst Mode™ operation provides high efficiency at low load currents. A maximum high duty cycle limit of 95% provides low dropout operation which extends operating time in battery-operated systems. The operating frequency is internally set to 200kHz, allowing small inductor values and minimizing PC board space. The operating current level is user-programmable via an external current sense resistor. Wide input supply range allows operation from 3.5V to 36V (absolute maximum). A multifunction pin (ITH/RUN) allows external compensation for optimum load step response plus shutdown. Soft start can also be implemented with the ITH/RUN pin to properly sequence supplies. Applications * Notebook and Palmtop Computers, PDAs * Cellular Telephones and Wireless Modems * Battery-Operated Digital Devices * DC Power Distribution Systems * Battery Chargers * N-Channel MOSFET Drive * Implements Boost, Step-Down, SEPIC and Inverting Regulators * Wide VIN Range: 3.5V to 36V Operation * Wide VOUT Range: 1.19V to 30V in Step-Down Configuration * ±1% 1.19V Reference * Low Dropout Operation: 95% Duty Cycle * 200kHz Fixed Frequency * Low Standby Current * Very High Efficiency * Remote Output Voltage Sense * Logic-Controlled Micropower Shutdown * Internal Diode for Bootstrapped Gate Drive * Current Mode Operation for Excellent Line and Load Transient Response * Available in an 8-Lead SO Package https://elecena.pl/product/251549/high-efficiency-so-8-n-channel-switching-regulator-controller 2007-03-02 https://elecena.pl/product/251549/high-efficiency-so-8-n-channel-switching-regulator-controller 2017-10-10 https://elecena.pl/product/251549/high-efficiency-so-8-n-channel-switching-regulator-controller 2025-01-20