Ideal for automotive, operates on 3.0V to 42V input

Linear Technology Korea (CEO Hong Sa-kwak) announced the release of a 1.5A, 42V input synchronous step-down switching regulator (product name: LT8608).

Linear's synchronous rectification topology provides 93% efficiency even at a switching frequency of 2 MHz, allowing designers to avoid noise-sensitive frequency bands like AM radio while utilizing a very small solution footprint.



Burst Mode® operation maintains a standby current of 2.5µA or less under no-load conditions, making it ideal for always-on systems.

The 3.0V to 42V input voltage range of this product is ideal for automotive applications that need to maintain output voltage during cold-crank and stop-start scenarios with a low minimum input voltage of 3.0V and load dump transients exceeding 40V.

The 2A switch can provide a continuous output current of up to 1.5A.

The LT8608 requires a minimum dropout voltage of only 200mV (@500mA) under all conditions and can withstand scenarios such as automotive cold cranking.

Spread spectrum frequency modulation and special design techniques are used in automobiles It provides low EMI operation that can minimize noise problems in industrial environments.

In addition, constant frequency switching of 2 MHz from 16 V input to 1.5 V output can be realized with a minimum on-time of 45 ns.

The LT8608's 10-pin thermally enhanced MSOP package and high switching frequency keep external inductors and capacitors small, providing a compact footprint with excellent thermal performance.

The LT8608 incorporates essential boost diodes, oscillators, control and logic circuits, and high-efficiency upper and lower power switches on a single die. Low-ripple burst mode operation maintains high efficiency at low output currents and keeps output ripple below 10mVP-P.

Proprietary design techniques and a new high-speed process enable high efficiency over a wide input voltage range, and the current mode topology of the LT8608 enables fast transient response and excellent loop stability.

Other features include internal compensation, power good flag, output soft start/tracking, and thermal protection. The T8608EMSE is supplied in a thermally enhanced MSOP-10 package, and the industrial temperature version, the LT8608IMSE, is tested at operating temperatures from -40°C to 125°C to guarantee operation.