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LT8610A/LT8610AB - 42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

LT8610AX - 42V, 3.5A Synchronous Step-Down Regulator with Operation to 175°C

Features

  • 100% Tested at 175°C
  • ±2% Reference Accuracy Over –40°C to 175°C Range
  • Wide Input Voltage Range: 3.7V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation
  • High Efficiency Synchronous Operation
  • 91% Eff. at 0.5A, at 175°C, 3.3VOUT from 12VIN
  • 92% Eff. at 0.5A, at 175°C, 5VOUT from 12VIN
  • Adjustable and Synchronizable Frequency: 200kHz to 2.2MHz
  • No Thermal Shutdown
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Power Good Flag
  • Small Thermally-Enhanced 16-Lead MSOP Package

Typical Application

LT8610AX Typical Application
LT8610AX Typical Application

Description

The LT®8610AX is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator rated to 175°C junction temperature. The LT8610AX is 100% tested a 175°C. 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 across a wide range of output currents while keeping the output ripple low. 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 LT8610AX. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup while the PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8610AX is available in small 16-lead MSOP package with exposed pad for low thermal resistance.

  FEEDBACK VOLTAGE MIN VIN 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 -

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing		 RoHS
LT8610AXMSE#PBF MS-16E MSE X 05-08-1667 Yes
LT8610AXMSE#TRPBF MS-16E MSE X 05-08-1667 Yes


LT8610AX Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)		 Price
(1k)*		 RoHS
LT8610AXMSE#PBF MS-16E X $178.57 $125.00 Yes
LT8610AXMSE#TRPBF MS-16E X $178.63 $125.06 Yes
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* The USA 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 Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Click here to view our complete list of demo boards

Applications

  • Oil and Gas Exploration

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT8610
LT8610A
LT8610AB
LT8610AC

LTpowerCAD

The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:
LT8610
LT8610A
LT8610AB

Technical Support