LT8647

RECOMMENDED FOR NEW DESIGNS

65V, 7A/8A Peak Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

Analog Devices LT8647 Product Info

10 February 2026 7

Features

Silent Switcher^® Architecture
- Ultralow EMI Emissions
- Optional Spread Spectrum Modulation/
High Efficiency at High Frequency

Up to 95% Efficiency at 1MHz, 12V_IN to 5V_OUT
Up to 94% Efficiency at 2MHz, 12V_IN to 5V_OUT

Wide Input Voltage Range: 3.4V to 65V
7A Maximum Continuous Output, 8A Peak Transient Output
Ultralow Quiescent Current Burst Mode® Operation

2.5μA IQ Regulating 12V_IN to 3.3V_OUT
Output Ripple < 10mV_P-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 27-Lead 6mm × 3mm Flip chip 2 quad flat no-lead (FC2QFN) Package

Part details & applications

The LT8647 synchronous step-down regulator features Silent Switcher architecture designed to minimize Electromagnetic interference (EMI) emissions while delivering high efficiency at high switching frequencies. This performance makes the LT8647 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, and spread spectrum operation can further reduce EMI emissions.

Applications

Industrial Supplies
General Purpose Step-Down

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