Analog Devices LT8645S-2

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.

Features

• Silent Switcher® Architecture
• Ultralow EMI Emissions
• Optional Spread Spectrum Modulation
• High Efficiency at High Frequency
• Up to 95% Efficiency at 1MHz, 12VIN to 5VOUT
• Up to 94% Efficiency at 2MHz, 12VIN to 5VOUT
• Wide Input Voltage Range: 3.4V to 65V
• Ultralow Quiescent Current Burst Mode Operation
• 2.5μA IQ Regulating 12VIN to 3.3VOUT
• Output Ripple < 10mVP-P
• Fast Minimum Switch On-Time: 40ns
• Low Dropout Under All Conditions: 60mV at 1A
• Adjustable and Synchronizable: 200kHz to 2.2MHz
• Peak Current Mode Operation
• Output Soft-Start and Tracking
• Small 32-Lead 6mm × 4mm LQFN Package
• AEC-Q100 Qualification In Progress

Typical applications

• Automotive and Industrial Supplies / General Purpose Step-Down / GSM Power Supplies

More information

• Datasheet