All regulators are synchronised to a single oscillator with an adjustable frequency from 250kHz to 2.2MHz. Micropower operation results in quiescent current of 30µA with all four regulators operating in the application below.
The high voltage channels are synchronous buck regulators that operate from an input of 3 to 42V. The output currents are up to 1.5 and 2.5A. The low voltage channels operate from an input of 2.6 to 5.5V. Internal synchronous power switches provide high efficiency with output currents up to 1.8A. The LT8602 uses a 2-phase clock with channels 1 and 3 operating 180° from channels 2 and 4 to reduce input ripple current on both HV and LV inputs. All channels have cycle-by-cycle current limit, providing protection against shorted outputs. Thermal shutdown provides additional protection.
The LT8602 is available in a 40-lead 6 × 6mm QFN package with an operational temperature range from -40 to 125°C.
