LT8620

RECOMMENDED FOR NEW DESIGNS

65V, 2A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Data Sheet (Rev. C) Product Selection Table

Part Models: 12
1ku List Price: Starting From $4.48

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Part Details

Wide Input Voltage Range: 3.4V to 65V
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:
- 94% Efficiency at 1A, 12V_IN to 5V_OUT
- 92% Efficiency at 1A, 12V_IN to 3.3V_OUT
Fast 30ns Minimum Switch-On Time
Low Dropout Under All Conditions: 250mV at 1A

Safely Tolerates Inductor Saturation in Overload
Low EMI
Adjustable and Synchronizable: 200kHz to 2.2MHz
Accurate 1V Enable Pin Threshold
Internal Compensation
Output Soft-Start and Tracking
Small Thermally Enhanced 16-Lead MSOP and 24-Lead 3mm × 5mm QFN Packages

Part Models: 12
1ku List Price: Starting From $4.48

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
LT8620EMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620EMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620EUDD#PBF	24-Lead QFN (3mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620EUDD#TRPBF	24-Lead QFN (3mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620HMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620HMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620IMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620IMSE#TRPBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620IUDD#PBF	24-Lead QFN (3mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620IUDD#TRPBF	24-Lead QFN (3mm x 5mm x 0.75mm w/ EP)	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620MPMSE#PBF	16-Lead MSOP w/ EP	Material Declaration Reliablity Data	Ultra Librarian SamacSys
LT8620MPMSE#TRPBF	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
LT8620EMSE#PBF	PRODUCTION
LT8620EMSE#TRPBF	PRODUCTION
LT8620IMSE#PBF	PRODUCTION
LT8620IMSE#TRPBF	PRODUCTION
Feb 4, 2020 - 20_0132 Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC
		PCN20_0132_Form Material_Report
LT8620EMSE#PBF	PRODUCTION
LT8620EMSE#TRPBF	PRODUCTION
LT8620HMSE#PBF	PRODUCTION
LT8620HMSE#TRPBF	PRODUCTION
LT8620IMSE#PBF	PRODUCTION
LT8620IMSE#TRPBF	PRODUCTION
LT8620MPMSE#PBF	PRODUCTION
LT8620MPMSE#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
LT8620EMSE#PBF	PRODUCTION
LT8620EMSE#TRPBF	PRODUCTION
LT8620EUDD#PBF	PRODUCTION
LT8620EUDD#TRPBF	PRODUCTION
LT8620HMSE#PBF	PRODUCTION
LT8620HMSE#TRPBF	PRODUCTION
LT8620IMSE#PBF	PRODUCTION
LT8620IMSE#TRPBF	PRODUCTION
LT8620IUDD#PBF	PRODUCTION
LT8620IUDD#TRPBF	PRODUCTION
LT8620MPMSE#PBF	PRODUCTION
LT8620MPMSE#TRPBF	PRODUCTION
Oct 11, 2022 - 22_0244 Epoxy Change from Henkel 8290 to 8290A for MSOP Package
		PCN22_0244_Form Material_Report Qualification Results Summary Delta Qualification Matrix
LT8620HMSE#PBF	PRODUCTION
LT8620HMSE#TRPBF	PRODUCTION
LT8620MPMSE#PBF	PRODUCTION
LT8620MPMSE#TRPBF	PRODUCTION
Apr 18, 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
LT8620HMSE#PBF	PRODUCTION
LT8620HMSE#TRPBF	PRODUCTION

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

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
High Voltage Hot Swap Controllers 1
LTC4364	RECOMMENDED FOR NEW DESIGNS	Surge Stopper with Ideal Diode

Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

LT8620

LTpowerCAD 1

LT8620 Project - 65V, 2A Synchronous Buck Regulator (7-60V to 5V @ 2A)

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

LT8620 Demo Board | Micropower Synchronous Buck, 5.5V ≤ VIN ≤ 65V, VOUT = 5V @ 2A

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Product Details

Demonstration circuit 1992A is a 65V, 2A micropower synchronous monolithic step-down regulator featuring the LT8620. The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current when the output is regulated at 5V. The demo board features a 5.5V to 65V inut voltage range and generates 5V at 2A.

Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8620 to minimize external components and simplify design.