Burst Mode operation keeps quiescent current under 3 µA in no-load standby conditions, for always-on systems. The device’s 3.0V 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 3.0V and load dump transients in excess of 40V. Its internal 1.2A switches deliver up to 750 mA of continuous output current. The LT8607 maintains a minimum dropout voltage of 250 mV (at 500 mA) under all conditions including automotive cold-crank. Spread spectrum frequency modulation ensure low EMI operation, enabling it to meet CISPR25, Class 5 EMI limits required by many automotive and industrial applications. A minimum on-time of 45 nsec enables 2 MHz constant frequency switching from a 16V input to a 1.5V output. The LT8607’s 8-lead thermally enhanced 2 x 2 mm DFN or 10-lead MSOP package and high switching frequency, which keeps the external inductor and capacitors small, provide a compact, thermally efficient footprint.
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. Burst Mode operation maintains high efficiency at low output currents while keeping output ripple below 10 mVP-P, with fast transient response and excellent loop stability. Other features include internal compensation, a power good flag, output soft-start/tracking and thermal protection. Pricing starts at $2.15 (1000).
Linear Technology/Analog Devices; www.linear.com/product/LT8607