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LT8646S - 8A Synchronous Step-Down Silent Switcher

Download the LT8646S datasheet PDF. This datasheet also covers the LT8645S variant, as both devices belong to the same 8a synchronous step-down silent switcher family and are provided as variant models within a single manufacturer datasheet.

General Description

The LT®8645S/LT8646S synchronous step-down regulator

Key Features

  • n Silent Switcher®2 Architecture n Ultralow EMI Emissions on Any PCB n Eliminates PCB Layout Sensitivity n Internal Bypass Capacitors Reduce Radiated EMI 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 (LT8645S) n Output Ripple < 10mVP-P n External Co.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LT8645S-AnalogDevices.pdf) that lists specifications for multiple related part numbers.

Other Datasheets by Analog Devices

Part Number Description
LT8646S 8A Synchronous Step-Down Silent Switcher 2
LT8640 5A Synchronous Step-Down Silent Switcher
LT8640-1 5A Synchronous Step-Down Silent Switcher
LT8640A 5A/8A Peak Synchronous Step-Down Silent Switcher
LT8640S 6A Synchronous Step-Down Silent Switcher
LT8641A 3.5A/5A Peak Synchronous Step-Down Silent Switcher
LT8642S 10A Synchronous Step-Down Silent Switcher 2
LT8643S 6A Synchronous Step-Down Silent Switcher-2
LT8643S 6A Synchronous Step-Down Silent Switcher
LT8645S 8A Synchronous Step-Down Silent Switcher

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LT8645S/LT8646S 65V, 8A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent Current FEATURES n Silent Switcher®2 Architecture n Ultralow EMI Emissions on Any PCB n Eliminates PCB Layout Sensitivity n Internal Bypass Capacitors Reduce Radiated EMI 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 (LT8645S) n Output Ripple < 10mVP-P n External Compensation: Fast Transient Response and Current Sharing (LT8646S) n Fast Minimum Switch On-Time: 40ns n Low Dropout Under All Conditions: 60mV at 1A n Adjustable and Synchronizable: 200kHz to 2.