LT8610AC/LT8610AC-1 - 42V, 3.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Features

  • LT8610 Feature Set, Plus:
    3V Minimum Input Voltage
    800mV Feedback Voltage
    3.5A Maximum Output Current
    Fast 30ns Minimum Switch-On Time
    Improved Burst Mode Efficiency
    Improved EMI
  • Wide Input Voltage Range: 3V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    2.5μA IQ Regulating 12VIN to 3.3VOUT
  • High Efficiency Synchronous Operation:
    95% Efficiency at 1A, 5VOUT from 12VIN
    93% Efficiency at 1A, 3.3VOUT from 12VIN
  • Low Dropout Under All Conditions: 200mV at 1A
  • Safely Tolerates Inductor Saturation in Overload
  • Adjustable and Synchronizable Frequency:
    LT8610AC: 200kHz to 2.2MHz
    LT8610AC-1: 1.5MHz to 2.2MHz
  • Accurate 1.015V Enable Pin Threshold
  • Output Soft-Start and Tracking
  • Small Thermally Enhanced 16-Lead MSOP Package
Designed for Automotive and Transportation Applications
AEC-Q100 generic family data available for specific packages


Typical Application

LT8610AC Typical Application
LT8610AC Typical Application

Description

The LT®8610AC/LT8610AC-1 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current. Compared to the LT8610AB, the LT8610AC/LT8610AC-1 has a lower feedback voltage of 800mV and a lower minimum VIN of 3V. The LT8610AC/LT8610AC-1 has the same additional features of the LT8610AB as compared to the LT8610: higher maximum output current of 3.5A, faster minimum on time of 30ns, and higher light load efficiency.

The LT8610AC/LT8610AC-1 has a SYNC pin for synchronization to an external clock. A capacitor on the TR/ SS pin programs the output voltage ramp rate during startup. The PG flag signals when VOUT is within ±8% of the programmed output voltage as well as fault conditions. The LT8610AC-1 has internal compensation optimized for high switching frequencies resulting in improved transient response compared to the LT8610AC. The LT8610AC-1 also has a feature which will soft-start the part when exiting dropout or brownout conditions reducing output voltage overshoot.

  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
LT8610ACEMSE-1#PBF MS-16E MSE E 05-08-1667 Yes
LT8610ACEMSE-1#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610ACEMSE#PBF MS-16E MSE E 05-08-1667 Yes
LT8610ACEMSE#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610ACHMSE-1#PBF MS-16E MSE H 05-08-1667 Yes
LT8610ACHMSE-1#TRPBF MS-16E MSE H 05-08-1667 Yes
LT8610ACHMSE#PBF MS-16E MSE C 05-08-1667 Yes
LT8610ACHMSE#TRPBF MS-16E MSE C 05-08-1667 Yes
LT8610ACIMSE-1#PBF MS-16E MSE I 05-08-1667 Yes
LT8610ACIMSE-1#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8610ACIMSE#PBF MS-16E MSE I 05-08-1667 Yes
LT8610ACIMSE#TRPBF MS-16E MSE I 05-08-1667 Yes


LT8610AC 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
LT8610ACEMSE-1#PBF MS-16E E $5.36 $3.75 Yes
LT8610ACEMSE-1#TRPBF MS-16E E $3.81 Yes
LT8610ACEMSE#PBF MS-16E E $5.36 $3.75 Yes
LT8610ACEMSE#TRPBF MS-16E E $3.81 Yes
LT8610ACHMSE-1#PBF MS-16E H $6.26 $4.38 Yes
LT8610ACHMSE-1#TRPBF MS-16E H $4.44 Yes
LT8610ACHMSE#PBF MS-16E C $6.26 $4.38 Yes
LT8610ACHMSE#TRPBF MS-16E C $4.44 Yes
LT8610ACIMSE-1#PBF MS-16E I $5.90 $4.13 Yes
LT8610ACIMSE-1#TRPBF MS-16E I $4.19 Yes
LT8610ACIMSE#PBF MS-16E I $5.90 $4.13 Yes
LT8610ACIMSE#TRPBF MS-16E I $4.19 Yes
Buy NowRequest Samples
* 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

Designed for Automotive and Transportation Applications

Please contact your local sales representative for more information regarding reliability reports and AEC-Q100 data or to inquire about parts that are not included. For more information, view our Automotive and Transportation page

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LT8610ACHMSE-1#PBF MS-16E H $6.26 $4.38 Yes
LT8610ACHMSE-1#TRPBF MS-16E H $4.44 Yes
LT8610ACHMSE#PBF MS-16E C $6.26 $4.38 Yes
LT8610ACHMSE#TRPBF MS-16E C $4.44 Yes
LT8610ACIMSE-1#PBF MS-16E I $5.90 $4.13 Yes
LT8610ACIMSE-1#TRPBF MS-16E I $4.19 Yes
LT8610ACIMSE#PBF MS-16E I $5.90 $4.13 Yes
LT8610ACIMSE#TRPBF MS-16E I $4.19 Yes
Buy NowRequest Samples
* 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.

Applications

  • Automotive and Industrial Supplies
  • GSM Power Supplies

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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

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, 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

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

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