element14 has introduced Linear Technology’s LT8609, a 2A, 42V 
input synchronous step-down switching regulator with unique synchronous rectification topology that delivers 93% efficiency while switching at 2MHz. This enables designers to avoid noise-sensitive frequency bands, such as AM radio, while providing a highly compact package; it is available in a small 10-lead thermally-enhanced MSOP package.
Suited for applications requiring general purpose step-down or low EMI step down, the LT8609 features :
- Wide Input Voltage Range: 3.0V to 42V
- Ultra-low Quiescent Current Burst Mode® Operation
- <2.5μA IQ Regulating 12VIN to 3.3VOUT
- Output Ripple <10mVP-P
- High Efficiency 2MHz Synchronous Operation (93% Efficiency at 1A, 5VOUT from 12VIN)
The LT8609’s 3.0V 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 3.0V and load dump transients in excess of 40V. The LT8609’s feature set is rounded off by internal compensation, a power good flag, output soft start/tracking and thermal protection.
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Linear Technology’s LT8609 from element14, a 2A, 42V input synchronous step-down switching regulator
