The device delivers 93% efficiency while switching at 2MHz, enabling designers to avoid critical noise-sensitive frequency bands, such as AM radio.
Burst Mode operation keeps quiescent current under 3µA in no-load standby conditions. Low ripple Burst Mode operation is said to maintain high efficiency at low output currents while keeping output ripple below 10mVP-P.
The device’s 3V to 42V input voltage range is suited for automotive applications that must regulate through cold-crank and stop-start scenarios with minimum input voltages as low as 3V and load dump transients in excess of 40V. Its internal 1.2A switches deliver up to 750mA of continuous output current.
The LT8607 maintains a minimum dropout voltage of 250mV (at 500mA) under all conditions. Spread spectrum frequency modulation ensures low EMI operation, enabling it to meet CISPR25, Class 5 EMI limits required by many automotive and industrial applications.
A minimum on-time of 45ns enables 2MHz constant frequency switching from a 16V input to a 1.5V output.
The LT8607 uses internal top and bottom high efficiency power switches with the necessary boost diode, oscillator, control and logic circuitry integrated into a single die.
Other features include internal compensation, a power good flag, output soft-start/tracking and thermal protection.
The LT8607EDC is offered in a 2 x 2mm 8-lead DFN package, whereas the LT8607EMSE is in a thermally enhanced MSOP-10 package. Industrial temperature versions, the devices operate in temperatures ranging from -40 to 125°C.
