LT8625SP/
LT8625SP-1

RECOMMENDED FOR NEW DESIGNS

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

Data Sheet (Rev. C) Product Selection Table
Part Models
4
1ku List Price
Starting From $4.35
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Part Details

  • Silent Switcher® 3 Architecture
    • Ultralow RMS Noise (10Hz to 100kHz): 4μVRMS
    • 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 (PVIN − 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 (LT8625SP) or 24-Lead 4mm × 4mm (LT8625SP-1) LQFN Exposed Back Package for Optional Heat Sink Mount
LT8625SP/
LT8625SP-1
18V/8A Step-Down Silent Switcher 3 with Ultralow Noise Reference
LT8625SP/LT8625SP-1 Typical Application Diagram LT8625SP/LT8625SP-1 Performance Graph LT8625SP/LT8625SP-1 Performance Graph LT8625SP/LT8625SP-1 Performance Graph
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Documentation

Data Sheet 1

User Guide 2

Technical Articles 3

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • LT8625S
  • LT8625SP
  • LT8625SP-1
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
DC3002A

LT8625SP | 18V, 8A Synchronous Step-Down Silent Switcher with Low Noise Reference

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Product Details

Demonstration circuit 3002A is a 18V, 8A synchronous step-down Silent Switcher® 3 with ultralow noise, high efficiency and power density featuring the LT8625SP. The input voltage range of DC3002A is 2.7V to 18V. The default demo board setting is 1V at 8A maximum DC output current. The LT8625SP is a compact, ultralow noise, ultralow emission, high efficiency and high speed synchronous monolithic step-down switching regulator. The uniquely designed combination of the ultralow noise reference and the third-generation Silent Switcher architecture enables the LT8625SP to achieve both high efficiency and excellent wideband noise performance. Minimum on-time of 15ns allows high VIN to low VOUT conversion at high frequencies.

eval board
schematic 4
schematic 5
schematic 6
DC3220A

LT8625SP-1 | 18V, 8A Synchronous Step-Down Silent Switcher with Low Noise Reference

Buy Now View Details

Product Details

Demonstration circuit 3220A is a 18V, 8A synchronous step-down Silent Switcher® 3 with ultralow noise, high efficiency and power density featuring the LT8625SP-1. The input voltage range of DC3220A is 2.7V to 18V. The default demo board setting is 1V at 8A maximum DC output current. The LT8625SP-1 is a compact, ultralow noise, ultralow emission, high efficiency and high speed synchronous monolithic step-down switching regulator. The uniquely designed combination of the ultralow noise reference and the third-generation Silent Switcher architecture enables the LT8625SP-1 to achieve both high efficiency and excellent wideband noise performance. Minimum on-time of 15ns allows high VIN to low VOUT conversion at high frequencies.
DC3002A
LT8625SP | 18V, 8A Synchronous Step-Down Silent Switcher with Low Noise Reference
DC3002A Evaluation Board DC3002A Evaluation Board - Top View DC3002A Evaluation Board - Bottom View
DC3220A
LT8625SP-1 | 18V, 8A Synchronous Step-Down Silent Switcher with Low Noise Reference
DC3220A Evaluation Board DC3220A Evaluation Board - Top View DC3220A Evaluation Board - Bottom View

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