The LTC1624IS8#PBF is a high efficiency N-Channel switching Regulator Controller drives an external N-channel power MOSFET using 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 3.5 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.
N-channel MOSFET drive
Implements boost, step-down, SEPIC and inverting regulators
Wide VOUT range (1.19 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 micro power shutdown
Internal diode for bootstrapped gate drive
Current mode operation for excellent line and load transient response
(EN)
