LT8645S-2 Datasheet | Analog Devices

FEATURES n Silent Switcher® Architecture n Ultralow EMI Emissions n Optional Spread Spectrum Modulation n High Efficiency at High Frequency n Up to 95% Efficiency at 1MHz, 12VIN to 5VOUT n Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT n Wide Input Voltage Range: 3.4V to 65V n Ultralow Quiescent Current Burst Mode Operation n 2.5μA IQ Regulating 12VIN to 3.3VOUT n Output Ripple < 10m VP-P n Fast Minimum Switch On-Time: 40ns n Low Dropout Under All Conditions: 60m V at 1A n Adjustable and Synchronizable: 200k Hz to 2.2MHz n Peak Current Mode Operation n Output Soft-Start and Tracking n Small 32-Lead 6mm × 4mm LQFN Package n AEC-Q100 Qualified for Automotive Applications APPLICATIONS n Automotive and Industrial Supplies n General Purpose Step-Down n GSM Power Supplies DESCRIPTION The LT®8645S-2 synchronous step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. This performance makes the LT8645S-2 ideal for noise sensitive applications and environments. The fast, clean, low-overshoot switching edges enable high efficiency operation even at high switching frequencies, leading to a small overall solution size. Peak current mode control with a 40ns minimum on-time allows high step-down ratios even at high switching frequencies. Burst Mode® operation enables ultralow standby current consumption, pulse-skipping mode allows full switching frequency at lower output loads, or spread spectrum operation can further reduce EMI emissions. LT8645S- INTERNAL CAPS Yes VC P Internal 150ºC GRADE No LT8646S- Yes External No No Internal Yes - See LT8645S/LT8646S Data Sheet All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. patents, including 8823345. POWER LOSS (W) TYPICAL APPLICATION VIN 5.5V TO 65V 5V 8A Step-Down Converter 4.7µF VIN EN/UV VIN 0.47µF LT8645S-2 BST SW BIAS INTVCC 1µF...