LT8620
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LT8620

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

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Documentation View All Documentation
LTspice LT8620 Demo Circuit - 5V 2MHz Step-Down Converter (5.5-65V to 5V @ 2A) Download 2.00KB LTspice LT8620 - Step-Down (Buck) Regulators Download 2.02 KB
Part Models 12
1ku List Price Starting From $4.48
Features
  • Wide Input Voltage Range: 3.4V to 65V
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 2.5μA IQ Regulating 12VIN to 3.3VOUT
    •  Output Ripple < 10mVP-P
  • High Efficiency Synchronous Operation:
    • 94% Efficiency at 1A, 12VIN to 5VOUT
    • 92% Efficiency at 1A, 12VIN to 3.3VOUT
  • 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
Additional Details
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The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that accepts a wide input voltage range up to 65V, and 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 10mVP-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 VIN undervoltage lockout or to shut down the LT8620 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 VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8620 is available in small 16-Lead MSOP and 3mm × 5mm QFN packages with exposed pads for low thermal resistance.

Applications

  • Automotive and Industrial Supplies
  • General Purpose Step-Down
  • GSM Power Supplies
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file View Data Sheet (Rev.C)
Documentation View All Documentation
LTspice LT8620 Demo Circuit - 5V 2MHz Step-Down Converter (5.5-65V to 5V @ 2A) Download 2.00KB LTspice LT8620 - Step-Down (Buck) Regulators Download 2.02 KB
Part Models 12
1ku List Price Starting From $4.48
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LT8620

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Data Sheet

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UPDATED 07/25/2024
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LT8620: 65V, 2A Synchronous Step-Down Regulator with 2.5μA Quiescent Current Data Sheet (Rev.C)

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UPDATED 08/12/2014
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LT8620: 具 2.5μA 静态电流的 65V、2A 同步降压型稳压器 数据手册

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UPDATED 07/17/2014
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LT8620: 静止電流が2.5μAの65V、2A同期整流式降圧レギュレータ データシート

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UPDATED 03/23/2018
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User Guide

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UPDATED 06/18/2014
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Documentation

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 external-link
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LT8620EMSE#TRPBF 16-Lead MSOP w/ EP external-link
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LT8620EUDD#PBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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LT8620EUDD#TRPBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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LT8620HMSE#PBF 16-Lead MSOP w/ EP external-link
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LT8620HMSE#TRPBF 16-Lead MSOP w/ EP external-link
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LT8620IMSE#PBF 16-Lead MSOP w/ EP external-link
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LT8620IMSE#TRPBF 16-Lead MSOP w/ EP external-link
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LT8620IUDD#PBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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LT8620IUDD#TRPBF 24-Lead QFN (3mm x 5mm x 0.75mm w/ EP) external-link
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LT8620MPMSE#PBF 16-Lead MSOP w/ EP external-link
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Jun 5, 2024

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT8620EMSE#PBF

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LT8620EMSE#TRPBF

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LT8620IMSE#PBF

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Delta Qualification Matrix

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Apr 11, 2019

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Notification of Wafer Fab Location Change for 0.35 BCD Process

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LT8620EMSE#TRPBF

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LT8620EUDD#PBF

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LT8620EUDD#TRPBF

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LT8620HMSE#PBF

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LT8620HMSE#TRPBF

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LT8620IMSE#PBF

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LT8620IMSE#TRPBF

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LT8620IUDD#PBF

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LT8620MPMSE#TRPBF

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Material_Report

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Delta Qualification Matrix

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Qualification Results Summary

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Detailed Parts List

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Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT8620HMSE#PBF

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LT8620HMSE#TRPBF

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LT8620MPMSE#PBF

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LT8620MPMSE#TRPBF

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PCN22_0244_Form

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Material_Report

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Delta Qualification Matrix

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Apr 18, 2022

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

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LT8620HMSE#TRPBF

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Jun 5, 2024

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

LT8620EMSE#PBF

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LT8620EMSE#TRPBF

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LT8620IMSE#PBF

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LT8620IMSE#TRPBF

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PCN24_0003_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Feb 4, 2020

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

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LT8620EMSE#TRPBF

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LT8620HMSE#PBF

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LT8620HMSE#TRPBF

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LT8620MPMSE#PBF

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LT8620MPMSE#TRPBF

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PCN20_0132_Form

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Material_Report

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Apr 11, 2019

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Notification of Wafer Fab Location Change for 0.35 BCD Process

LT8620EMSE#PBF

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LT8620EMSE#TRPBF

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LT8620EUDD#PBF

PRODUCTION

LT8620EUDD#TRPBF

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LT8620HMSE#PBF

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LT8620HMSE#TRPBF

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LT8620IMSE#PBF

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LT8620IMSE#TRPBF

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LT8620IUDD#PBF

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LT8620IUDD#TRPBF

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LT8620MPMSE#PBF

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LT8620MPMSE#TRPBF

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pdf

PCN19_0067_Form

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xls

Material_Report

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xlsm

Delta Qualification Matrix

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pdf

Qualification Results Summary

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Detailed Parts List

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Other

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Oct 11, 2022

- 22_0244

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT8620HMSE#PBF

PRODUCTION

LT8620HMSE#TRPBF

PRODUCTION

LT8620MPMSE#PBF

PRODUCTION

LT8620MPMSE#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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Delta Qualification Matrix

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Apr 18, 2022

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

LT8620HMSE#PBF

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LT8620HMSE#TRPBF

PRODUCTION

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PCN22_0050_Form

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Material_Report

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Qualification Results Summary

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Delta Qualification Matrix

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Evaluation Kit

Evaluation Kits 1

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DC1992A

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

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DC1992A

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

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DC1992A
LT8620 Demo Board | Micropower Synchronous Buck, 5.5V ≤ VIN ≤ 65V, VOUT = 5V @ 2A
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Product Detail

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.

Resources

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DC1992A - Demo Manual Download

448.00K

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DC1992A - Design Files Download

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DC1992A - Schematic Download

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Evaluation Kits1

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DC1992A

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

Tools & Simulations 2

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

spice tool Lt Spice

LT8620 Demo Circuit - 5V 2MHz Step-Down Converter (5.5-65V to 5V @ 2A) Download

2.00K

spice tool Lt Spice

LT8620 - Step-Down (Buck) Regulators Download

2.02 K

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