LT8625S

RECOMMENDED FOR NEW DESIGNS

18V/8A Step-Down Silent Switcher 3 with Ultralow Noise Reference

Analog Devices LT8625S Product Info

10 February 2026 7

Features

Silent Switcher^® 3 Architecture
- Ultralow RMS Noise (10Hz to 100kHz): 4μV_RMS
- Ultralow Spot Noise: 4nV/√Hz at 10kHz
- Ultralow EMI Emissions on Any PCB
- Internal Bypass Capacitors Reduce Radiated EMI
High Efficiency at High Frequency
Ultrafast Transient Response: 1μs
Fast Minimum Switch On-Time: 15ns
Input Voltage Range: 2.7V to 18V

Output Voltage Range: 0V to (PV_IN − 0.5V)
8A Maximum Continuous Output Current
Precision Reference: ±0.8% Over
Temperature with Remote Sense
Supports Dynamic Output Voltage Control
PolyPhase^® Operation: Up to 12 Phases
Forced Continuous Mode Capability
Adjustable and Synchronizable: 300kHz to 4MHz
Programmable Power Good
Small 20-Lead 4mm × 3mm LQFN Package

Part details & applications

The LT8625S synchronous step-down regulator features third-generation Silent Switcher technology which is uniquely designed to combine an ultralow noise reference with Silent Switcher architecture in order to achieve both high efficiency and excellent wideband noise performance.

The innovative ultralow noise architecture provides exceptional low frequency (0.1Hz to 100kHz) output noise performance in a switching regulator. The output voltage can be programmed with a single resistor, resulting in virtually constant output noise independent of output voltage.

Silent Switcher architecture minimizes EMI emissions while delivering high efficiency at high switching frequencies.

The LT8625S is ideal for high current, noise sensitive applications which benefit from the high efficiency of a synchronous switching regulator.

Applications

RF Power Suppliers: PLLs, VCOs, Mixers, LNAs, PAs
High Speed/High Precision ADCs/DACs
Low Noise Instrumentation

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