Features and Benefits
- 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 with High Gain Error Amplifier
- Input Voltage Range: 2.7V to 18V
- 8A Maximum Continuous Output Current
- Fast Minimum Switch On-Time: 15ns
- Precision Current Reference: 100μA ± 0.8% Over
Temperature with Remote Sense
- 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
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, providing unitygain operation over the output range, 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.
- RF Power Suppliers: PLLs, VCOs, Mixers, LNAs, PAs
- High Speed/High Precision ADCs/DACs
- Low Noise Instrumentation
Markets and Technologies
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (1)
Demonstration circuit 3219A is a 18V, 8A synchronous step-down Silent Switcher 3 with ultralow noise, high efficiency and power density featuring the LT8625S. The input voltage range of DC3219A is 2.7V to 18V. The default demo board setting is 1.0V at 8A maximum DC output current. The LT8625S 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 LT8625S to achieve both high efficiency and excellent wideband noise performance. Minimum on-time of 15ns allows high VIN to low VOUT conversion at high frequency.
Complete documentation is available upon completion of a Non-Disclosure Agreement (NDA). Please send your project details, company information and contact by e-mail to BUC_Doc_Request@analog.com. Additional support is available from your Analog Devices local sales.
Documentation & Resources
Revolutionizing Wireless Coverage: The Power of Cellular DAS Integrated Solutions5/1/2023 Analog Dialogue
How to Achieve Ultrafast Power Supply Transient Response for RF Applications7/1/2022 Analog Dialogue
Low Noise Silent Switcher μModule and LDO Regulators Improve Ultrasound Noise and Image Quality4/4/2022 Analog Dialogue
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.
|Part Number||Material Declaration||Reliability Data||Pin/Package Drawing||CAD Symbols, Footprints & 3D Models|
|LT8625SIV#TRMPBF||Material Declaration||Reliability Data||20-Lead LQFN (4mm x 3mm x 0.94mm)|
|LT8625SIV#TRPBF||Material Declaration||Reliability Data||20-Lead LQFN (4mm x 3mm x 0.94mm)|
|Wafer Fabrication Data|
Support & Discussions
Sample & Buy
See our Ordering FAQs for answers to questions about online orders, payment options and more.
Buy Now Pricing
(**) Displayed Buy Now Price and Price Range is based on small quantity orders.
(*)The 1Ku list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
Please see the latest communication from our CCO regarding lead times.
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.
Pricing displayed is based on 1-piece.
Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.
Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.