Analog Devices LT8636

Description

The LT®8636 synchronous step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switch¬ing frequencies. Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies. The LT8636’s ultralow 2.5μA quiescent current—with the output in full regulation—enables applications requiring highest efficiency at very small load currents. A CLKOUT pin enables synchronizing other regulators to the LT8636. Burst Mode operation enables ultralow standby current consumption, forced continuous mode can control fre¬quency harmonics across the entire output load range, or spread spectrum operation can further reduce EMI emis¬sions. Soft-start and tracking functionality is accessed via the TR/SS pin, and an accurate input voltage UVLO threshold can be set using the EN/UV pin.

Features

• Silent Switcher ® Architecture
• Ultralow EMI Emissions
• Optional Spread Spectrum Modulation
• High Efficiency at High Frequency nnUp to 96% Efficiency at 1MHz, 12VIN to 5VOUT
• Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT
• Wide Input Voltage Range: 3.4V to 42V
• 5A Maximum Continuous, 7A Peak Output
• Ultralow Quiescent Current Burst Mode® Operation nn2.5μA IQ Regulating 12VIN to 3.3VOUT
• Output Ripple < 10mVP-P
• Fast Minimum Switch On-Time: 30ns
• Low Dropout Under All Conditions: 100mV at 1A
• Forced Continuous Mode
• Adjustable and Synchronizable: 200kHz to 3MHz
• Output Soft-Start and Tracking
• Small 20-Lead 4mm × 3mm LQFN Package
• AEC-Q100 Qualification in Progress

Typical applications

• Automotive and Industrial Supplies, General Purpose Step-Down

More information

• Datasheet
• IC product information