LT8614

PRODUCTION

42V, 4A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

Data Sheet (Rev. H) Product Selection Table

Part Models: 12
1ku List Price: Starting From $5.07

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Part Details

Silent Switcher^® Architecture
- Ultralow EMI Emissions
High Efficiency at High Frequency
- Up to 96% 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 42V
Ultralow Quiescent Current Burst Mode^® Operation:
- 2.5μA I_Q Regulating 12V_IN to 3.3V_OUT
- Output Ripple < 10mV_P-P

Fast Minimum Switch On-Time: 30ns
Low Dropout Under All Conditions: 125mV at 1A
Safely Tolerates Inductor Saturation in Overload
Adjustable and Synchronizable: 200kHz to 3MHz
Peak Current Mode Operation
Accurate 1V Enable Pin Threshold
Internal Compensation
Output Soft-Start and Tracking
Small 18-Lead 3mm × 4mm QFN
AEC-Q100 Qualified for Automotive Applications

Part Models: 12
1ku List Price: Starting From $5.07

Documentation

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 Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
LT8614EUDC#PBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614EUDC#TRPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614EUDC#WPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614EUDC#WTRPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614HUDC#PBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614HUDC#TRPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614HUDC#WPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614HUDC#WTRPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614IUDC#PBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614IUDC#TRPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614IUDC#WPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8614IUDC#WTRPBF	20(18)-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Sep 30, 2020 - 20_0293 Test Site Transfer from Analog Devices Singapore to UTAC Thailand
		PCN20_0293_Form Material_Report Delta Qualification Matrix Qualification Results Summary Test Correlation Report Test Correlation Report Other Qualification Results Summary
LT8614EUDC#PBF	PRODUCTION
LT8614EUDC#TRPBF	PRODUCTION
LT8614HUDC#PBF	PRODUCTION
LT8614HUDC#TRPBF	PRODUCTION
LT8614IUDC#PBF	PRODUCTION
LT8614IUDC#TRPBF	PRODUCTION
Apr 11, 2019 - 19_0067 Notification of Wafer Fab Location Change for 0.35 BCD Process
		PCN19_0067_Form Material_Report Delta Qualification Matrix Qualification Results Summary Detailed Parts List Other
LT8614EUDC#PBF	PRODUCTION
LT8614EUDC#TRPBF	PRODUCTION
LT8614HUDC#PBF	PRODUCTION
LT8614HUDC#TRPBF	PRODUCTION
LT8614IUDC#PBF	PRODUCTION
LT8614IUDC#TRPBF	PRODUCTION

This is the most up-to-date revision of the Data Sheet.

Hardware Ecosystem

Parts	Product Life Cycle	Description
Digital Power System Managers 1
LTC2977	RECOMMENDED FOR NEW DESIGNS	8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement
High Voltage Hot Swap Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode
PowerPath, Ideal Diodes, and Load Switches 1
LTC4417	RECOMMENDED FOR NEW DESIGNS	Prioritized PowerPath^™ Controller

Parts	Product Life Cycle	Description
LT8640 LT8640-1		42V, 5A Synchronous Step-Down Silent Switcher with 2.5μA Quiescent Current

Tools & Simulations

LTspice 4

Models for the following parts are available in LTspice:

LT8614

LTpowerCAD 1

LT8614 Project - 42V, 4A Monolithic μPower Buck Silent Switcher (8-42V to 5V @ 4A)

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.

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

Evaluation Kits

LT8614 Demo Board | 2MHz Buck Silent Switcher, 5.8V ≤ VIN ≤ 42V, VOUT = 5V @ 4A

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Product Details

Demonstration circuit 2019B is a 42V, 4A micropower synchronous step-down Silent Switcher^™ featuring the LT8614. The demo board is designed for 5V output from a 5.8V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8614 is a compact, ultralow emission, high efficiency and high speed synchronous monolithic step-down switching regulator. The integrated power switches and inclusion of all necessary circuitry reduce the components count and solution size. Special Silent Switcher architecture minimizes EMI/EMC emissions. Ultralow 2.5μA quiescent current in Burst Mode^® operation achieves high efficiency at very light loads. Fast minimum on-time of 30ns enables high V_IN to low V_OUT conversion at high frequency.

Resources

DC2019B - Schematic
32.00K

DC2019B - Demo Manual
245.00K

DC2019B - Design Files
950.00K

Latest Discussions

2 Years Ago

LT8614

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Application Note 1

Technical Articles 5

Solutions Bulletin & Brochure 2

Book & eBook 1

Webcast 4