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

Features

  • LT8610 Feature Set, Plus:
    3.5A Maximum Output Current
    Fast 30ns Minimum Switch-On Time
    Improved Burst Mode Efficiency (LT8610AB Only)
    Improved EMI
  • Wide Input Voltage Range: 3.4V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    2.5μA IQ Regulating 12VIN to 3.3VOUT
  • Fixed Output Voltages: 3.3V, 5V
  • Output Ripple < 10mVP-P (LT8610A Only)
  • 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:
    200kHz to 2.2MHz
  • Accurate 1V Enable Pin Threshold
  • Output Soft-Start and Tracking
  • Small Thermally Enhanced 16-Lead MSOP Package
Designed for Automotive and Transportation Applications
AEC-Q100 data available for specific packages


Typical Application

LT8610A Typical Application
LT8610A Typical Application

Description

The LT®8610A/LT8610AB series are compact, high efficiency, high speed synchronous monolithic step-down switching regulators that consume only 2.5μA of quiescent current. Compared to the LT8610, they have higher maximum output currents of 3.5A and a faster minimum switch-on time of 30ns. The LT8610A has the same low ripple burst mode performance of the LT8610, while the LT8610AB has even higher light load efficiency.

The other features of the LT8610 remain unchanged in the LT8610A/LT8610AB series. A SYNC pin allows synchronization to an external clock. The EN/UV pin has an accurate 1V threshold for VIN undervoltage lockout or shut down. A capacitor on the TR/SS pin programs the output voltage ramp rate during startup. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions.

  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

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

Part Number Package Code Temp Package
Drawing
RoHS
LT8610ABEMSE-3.3#PBF MS-16E MSE E 05-08-1667 Yes
LT8610ABEMSE-3.3#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610ABEMSE-5#PBF MS-16E MSE E 05-08-1667 Yes
LT8610ABEMSE-5#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610ABEMSE#PBF MS-16E MSE E 05-08-1667 Yes
LT8610ABEMSE#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610ABHMSE-3.3#PBF MS-16E MSE H 05-08-1667 Yes
LT8610ABHMSE-3.3#TRPBF MS-16E MSE H 05-08-1667 Yes
LT8610ABHMSE-5#PBF MS-16E MSE H 05-08-1667 Yes
LT8610ABHMSE-5#TRPBF MS-16E MSE H 05-08-1667 Yes
LT8610ABIMSE-3.3#PBF MS-16E MSE I 05-08-1667 Yes
LT8610ABIMSE-3.3#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8610ABIMSE-5#PBF MS-16E MSE I 05-08-1667 Yes
LT8610ABIMSE-5#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8610ABIMSE#PBF MS-16E MSE I 05-08-1667 Yes
LT8610ABIMSE#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8610AEMSE-3.3#PBF MS-16E MSE E 05-08-1667 Yes
LT8610AEMSE-3.3#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610AEMSE-5#PBF MS-16E MSE E 05-08-1667 Yes
LT8610AEMSE-5#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610AEMSE#PBF MS-16E MSE E 05-08-1667 Yes
LT8610AEMSE#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8610AHMSE-3.3#PBF MS-16E MSE H 05-08-1667 Yes
LT8610AHMSE-3.3#TRPBF MS-16E MSE H 05-08-1667 Yes
LT8610AHMSE-5#PBF MS-16E MSE H 05-08-1667 Yes
LT8610AHMSE-5#TRPBF MS-16E MSE H 05-08-1667 Yes
LT8610AHMSE#PBF MS-16E MSE H 05-08-1667 Yes
LT8610AHMSE#TRPBF MS-16E MSE H 05-08-1667 Yes
LT8610AIMSE-3.3#PBF MS-16E MSE I 05-08-1667 Yes
LT8610AIMSE-3.3#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8610AIMSE-5#PBF MS-16E MSE I 05-08-1667 Yes
LT8610AIMSE-5#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8610AIMSE#PBF MS-16E MSE I 05-08-1667 Yes
LT8610AIMSE#TRPBF MS-16E MSE I 05-08-1667 Yes


LT8610A Package Drawing
LT8610A 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
LT8610ABEMSE-3.3#PBF MS-16E E $5.36 $3.75 Yes
LT8610ABEMSE-3.3#TRPBF MS-16E E $3.81 Yes
LT8610ABEMSE-5#PBF MS-16E E $5.36 $3.75 Yes
LT8610ABEMSE-5#TRPBF MS-16E E $3.81 Yes
LT8610ABEMSE#PBF MS-16E E $5.36 $3.75 Yes
LT8610ABEMSE#TRPBF MS-16E E $3.81 Yes
LT8610ABHMSE-3.3#PBF MS-16E H $6.26 $4.38 Yes
LT8610ABHMSE-3.3#TRPBF MS-16E H $4.44 Yes
LT8610ABHMSE-5#PBF MS-16E H $6.26 $4.38 Yes
LT8610ABHMSE-5#TRPBF MS-16E H $4.44 Yes
LT8610ABIMSE-3.3#PBF MS-16E I $5.90 $4.13 Yes
LT8610ABIMSE-3.3#TRPBF MS-16E I $4.19 Yes
LT8610ABIMSE-5#PBF MS-16E I $5.90 $4.13 Yes
LT8610ABIMSE-5#TRPBF MS-16E I $4.19 Yes
LT8610ABIMSE#PBF MS-16E I $5.90 $4.13 Yes
LT8610ABIMSE#TRPBF MS-16E I $4.19 Yes
LT8610AEMSE-3.3#PBF MS-16E E $5.36 $3.75 Yes
LT8610AEMSE-3.3#TRPBF MS-16E E $3.81 Yes
LT8610AEMSE-5#PBF MS-16E E $5.36 $3.75 Yes
LT8610AEMSE-5#TRPBF MS-16E E $3.81 Yes
LT8610AEMSE#PBF MS-16E E $5.36 $3.75 Yes
LT8610AEMSE#TRPBF MS-16E E $3.81 Yes
LT8610AHMSE-3.3#PBF MS-16E H $6.26 $4.38 Yes
LT8610AHMSE-3.3#TRPBF MS-16E H $4.44 Yes
LT8610AHMSE-5#PBF MS-16E H $6.26 $4.38 Yes
LT8610AHMSE-5#TRPBF MS-16E H $4.44 Yes
LT8610AHMSE#PBF MS-16E H $6.26 $4.38 Yes
LT8610AHMSE#TRPBF MS-16E H $4.44 Yes
LT8610AIMSE-3.3#PBF MS-16E I $5.90 $4.13 Yes
LT8610AIMSE-3.3#TRPBF MS-16E I $4.19 Yes
LT8610AIMSE-5#PBF MS-16E I $5.90 $4.13 Yes
LT8610AIMSE-5#TRPBF MS-16E I $4.19 Yes
LT8610AIMSE#PBF MS-16E I $5.90 $4.13 Yes
LT8610AIMSE#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.

Part Number Description Price Documentation
DC2012A LT8610AB Demo Board | Micropower Sync Buck, High Efficiency Burst Mode, 5.5V ≤ VIN ≤ 42V, Vout = 5V @ 3.5A $125.00
DC2139A LT8610A Demo Board | Micropower Sync Buck, 5.5V ≤ VIN ≤ 42V Input, Vout = 5V @ 3.5A Contact Factory
Buy Now
Click here to view our complete list of demo boards

Designed for Automotive and Transportation Applications

AEC-Q100 data is available for these specific part numbers. Please contact your local sales representative for more information regarding reliability reports 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
LT8610ABHMSE-3.3#PBF MS-16E H $6.26 $4.38 Yes
LT8610ABHMSE-3.3#TRPBF MS-16E H $4.44 Yes
LT8610ABHMSE-5#PBF MS-16E H $6.26 $4.38 Yes
LT8610ABHMSE-5#TRPBF MS-16E H $4.44 Yes
LT8610ABIMSE-3.3#PBF MS-16E I $5.90 $4.13 Yes
LT8610ABIMSE-3.3#TRPBF MS-16E I $4.19 Yes
LT8610ABIMSE-5#PBF MS-16E I $5.90 $4.13 Yes
LT8610ABIMSE-5#TRPBF MS-16E I $4.19 Yes
LT8610ABIMSE#PBF MS-16E I $5.90 $4.13 Yes
LT8610ABIMSE#TRPBF MS-16E I $4.19 Yes
LT8610AHMSE-3.3#PBF MS-16E H $6.26 $4.38 Yes
LT8610AHMSE-3.3#TRPBF MS-16E H $4.44 Yes
LT8610AHMSE-5#PBF MS-16E H $6.26 $4.38 Yes
LT8610AHMSE-5#TRPBF MS-16E H $4.44 Yes
LT8610AHMSE#PBF MS-16E H $6.26 $4.38 Yes
LT8610AHMSE#TRPBF MS-16E H $4.44 Yes
LT8610AIMSE-3.3#PBF MS-16E I $5.90 $4.13 Yes
LT8610AIMSE-3.3#TRPBF MS-16E I $4.19 Yes
LT8610AIMSE-5#PBF MS-16E I $5.90 $4.13 Yes
LT8610AIMSE-5#TRPBF MS-16E I $4.19 Yes
LT8610AIMSE#PBF MS-16E I $5.90 $4.13 Yes
LT8610AIMSE#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

LTspiceIV

LTspice® IV 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 IV

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

LTpowerCAD

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To open the project file for this circuit:

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

Technical Support