"The LTC®1624 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 ModeTM 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 minimising 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.

Features:

â–  N-Channel MOSFET Drive
â–  Implements Boost, Step-Down, SEPIC and Inverting Regulators
â–  Wide VIN Range: 3.5V to 36V Operation
â–  Wide VOUT Range: 1.19V to 30V in Step-Down Configuration
â–  ±1% 1.19V Reference
â–  Low Dropout Operation: 95% Duty Cycle
â–  200kHz Fixed Frequency
â–  Low Standby Current
â–  Very High Efficiency
â–  Remote Output Voltage Sense
â–  Logic-Controlled Micropower Shutdown
â–  Internal Diode for Bootstrapped Gate Drive
â–  Current Mode Operation for Excellent Line and Load Transient Response
â–  Available in an 8-Lead SO Package
"