LT8610

PRODUCTION

42V, 2.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Data Sheet (Rev. D) Product Selection Table

Part Models: 12
1ku List Price: Starting From $4.25

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Part Details

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
High Efficiency Synchronous Operation:
- 96% Efficiency at 1A, 5V_OUT from 12V_IN
- 94% Efficiency at 1A, 3.3V_OUT from 12V_IN
Fast Minimum Switch-On Time: 50ns
Low Dropout Under All Conditions: 200mV at 1A

Allows Use Of Small Inductors
Low EMI
Adjustable and Synchronizable: 200kHz to 2.2MHz
Current Mode Operation
Accurate 1V Enable Pin Threshold
Internal Compensation
Output Soft-Start and Tracking
Small Thermally Enhanced 16-Lead MSOP Package
AEC-Q100 Qualified for Automotive Applications

The LT8610 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Top and bottom power switches are included with all necessary circuitry to minimize the need for external components. Low ripple Burst Mode operation enables high efficiency down to very low output currents while keeping the output ripple below 10mV_P-P. A SYNC pin allows synchronization to an external clock. Internal compensation with peak current mode topology allows the use of small inductors and results in fast transient response and good loop stability. The EN/UV pin has an accurate 1V threshold and can be used to program V_IN undervoltage lockout or to shut down the LT8610 reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when V_OUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8610 is available in a small 16-lead MSOP package with exposed pad for low thermal resistance.


	Feedback Voltage	Min V_IN	Output Current	Notes
LT8610AC-1	0.80V	3.0V	3.5A	Fsw = 1.5MHz to 2.2MHz, Optimized Transient Response
LT8610AC	0.80V	3.0V	3.5A	Fsw = 200kHz to 2.2MHz
LT8610AB	0.97V	3.4V	3.5A	Improved Burst Mode Efficiency
LT8610AX	0.97V	3.4V	3.5A	175°C Max Junction Temp
LT8610A	0.97V	3.4V	3.5A	Higher Iout, 30ns Min On Time
LT8610	0.97V	3.4V	2.5A	-

Applications

Automotive and Industrial Supplies
General Purpose Step-Down
GSM Power Supplies

Part Models: 12
1ku List Price: Starting From $4.25

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
LT8610EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610EMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610EMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610HMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610HMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610HMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610HMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610IMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610IMSE#WPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8610IMSE#WTRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 5, 2024 - 24_0003 Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)
		PCN24_0003_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT8610EMSE#PBF	PRODUCTION
LT8610EMSE#TRPBF	PRODUCTION
LT8610EMSE#WPBF
LT8610EMSE#WTRPBF
LT8610HMSE#PBF	PRODUCTION
LT8610HMSE#TRPBF	PRODUCTION
LT8610HMSE#WPBF
LT8610HMSE#WTRPBF
LT8610IMSE#PBF	PRODUCTION
LT8610IMSE#TRPBF	PRODUCTION
LT8610IMSE#WPBF
LT8610IMSE#WTRPBF
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT8610EMSE#PBF	PRODUCTION
LT8610EMSE#TRPBF	PRODUCTION
LT8610EMSE#WPBF
LT8610EMSE#WTRPBF
LT8610HMSE#PBF	PRODUCTION
LT8610HMSE#TRPBF	PRODUCTION
LT8610HMSE#WPBF
LT8610HMSE#WTRPBF
LT8610IMSE#PBF	PRODUCTION
LT8610IMSE#TRPBF	PRODUCTION
LT8610IMSE#WPBF
LT8610IMSE#WTRPBF
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
LT8610EMSE#PBF	PRODUCTION
LT8610EMSE#TRPBF	PRODUCTION
LT8610HMSE#PBF	PRODUCTION
LT8610HMSE#TRPBF	PRODUCTION
LT8610IMSE#PBF	PRODUCTION
LT8610IMSE#TRPBF	PRODUCTION
Feb 14, 2025 - 25_0017 Bond Wire Change from Gold to Copper
		PCN25_0017_Form Material_Report Qualification Results Summary
LT8610EMSE#WPBF
LT8610EMSE#WTRPBF
LT8610HMSE#PBF	PRODUCTION
LT8610HMSE#TRPBF	PRODUCTION
LT8610HMSE#WPBF
LT8610HMSE#WTRPBF
LT8610IMSE#WPBF
LT8610IMSE#WTRPBF
Jul 12, 2022 - 22_0157 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]
		PCN22_0157_Form Material_Report Qualification Results Summary Delta Qualification Matrix Detailed Parts List
LT8610HMSE#PBF	PRODUCTION
LT8610HMSE#TRPBF	PRODUCTION
LT8610HMSE#WPBF
LT8610HMSE#WTRPBF
LT8610IMSE#PBF	PRODUCTION
LT8610IMSE#TRPBF	PRODUCTION
Jun 21, 2022 - 22_0050 UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices
		PCN22_0050_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT8610HMSE#PBF	PRODUCTION
LT8610HMSE#TRPBF	PRODUCTION
LT8610IMSE#PBF	PRODUCTION
LT8610IMSE#TRPBF	PRODUCTION

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

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Parts	Product Life Cycle	Description
LT8610A LT8610AB		42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Tools & Simulations

LTspice 3

Models for the following parts are available in LTspice:

LT8610
LT8610A
LT8610AB
LT8610AC

LTpowerCAD 1

LT8610 Project - Synchronous Buck Converter (3.4-42V to 3.3V @ 2.5A)

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

LT8610 Demo Board | Synchronous Step-Down Converter: 3.4V to 42V Input, 5VOUT at 2.5A

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Product Details

Demonstration circuit 1749B is a 42V, 2.5A micropower synchronous step-down regulator featuring the LT8610. The LT8610 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current when output is regulated at 5V. Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8610 to minimize external components and simplify design.

Resources

DC1749B - Schematic
31.00K

DC1749B - Design Files
866.00K

DC1749B - Demo Manual
222.00K

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LT8610

Part Details

Documentation

Data Sheet 1

Reliability Data 1

User Guide 2

Application Note 1

Design Note 1

Technical Articles 5

Video 1

Solutions Bulletin & Brochure 2

Book & eBook 1

Rarely Asked Question Page 1

Webcast 3