The LT8616’s 35ns minimum on-time enables 16VIN to 1.8VOUT step-down conversions, while switching at 2MHz helps designers avoid critical noise-sensitive frequency bands, such as AM radio while having a very compact solution footprint. Its 3.4V to 42V input voltage range makes it ideal for automotive applications which must regulate through cold-crank and stop-start scenarios with minimum input voltages as low as 3.4V and load dump transients in excess of 40V. Each channel of the LT8616 maintains a minimum dropout voltage of only 400mV (at1A) under all conditions, enabling it to excel in scenarios such as automotive cold-crank.

The LT8616’s 28-lead thermally enhanced TSSOP package and high switching frequency keeps external inductors and capacitors small, providing a compact, thermally efficient footprint.

The LT8616 utilizes dual internal top and bottom high efficiency power switches with the necessary boost diodes, oscillator, control and logic circuitry integrated into a single die.

Each channel switches 180 degrees out-of-phase to reduce output ripple. Each channel has a separate input for added design flexibility. Low ripple Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 15mVP-P. Unique design techniques and a new high speed process enable high efficiency over a wide input voltage range, and the LT8616's current-mode topology provides fast transient response and excellent loop stability. Other features include internal compensation, power good flags, output soft-start/tracking and thermal protection.

The LT8616 is available in a thermally enhanced 28-lead TSSOP package. Three temperature grades are available, with operation from -40°C to 125°C (junction) for the extended (E) and industrial (I) grades and a high temperature (H) grade of -40°C to 150°C. The 1,000 piece price starts at $4.15. All versions are available from stock.

Features:

－ Wide Input Voltage Range: 3.4V to 42V

－ 2.5A and 1.5A Buck Regulators with Separate Inputs

－ Fast Minimum Switch On-Time: 35ns

－ Ultralow Quiescent Current Burst Mode Operation:

－ 180° Out-of-Phase Switching

－ Adjustable and Synchronizable:

200kHz to 3MHz

－ Accurate 1V Enable Pin Thresholds

－ Internal Compensation

－ Output Soft-Start and Tracking

－ TSSOP Package: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or When a Pin Is Left Floating

－ Thermally Enhanced 28-Lead TSSOP Package