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


  • 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

Typical Application

LT8610A Typical Application
LT8610A Typical Application


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.

LT8610AC 0.80V 3.0V 3.5A 30ns Yes
LT8610AB* 0.97V 3.4V 3.5A 30ns Yes
LT8610A* 0.97V 3.4V 3.5A 30ns Yes
LT8610* 0.97V 3.4V 2.5A 50ns -
*See LT8610A/LT8610AB or LT8610 data sheet.


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


LT8610A Package Drawing
LT8610A Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LT8610ABEMSE-3.3#PBF MSOP 16 E $5.36 $3.75 View
LT8610ABEMSE-3.3#TRPBF MSOP 16 E $3.81 View
LT8610ABEMSE-5#PBF MSOP 16 E $5.36 $3.75 View
LT8610ABEMSE-5#TRPBF MSOP 16 E $3.81 View
LT8610ABEMSE#PBF MSOP 16 E $5.36 $3.75 View
LT8610ABEMSE#TRPBF MSOP 16 E $3.81 View
LT8610ABHMSE-3.3#PBF MSOP 16 H $6.26 $4.38 View
LT8610ABHMSE-3.3#TRPBF MSOP 16 H $4.44 View
LT8610ABHMSE-5#PBF MSOP 16 H $6.26 $4.38 View
LT8610ABHMSE-5#TRPBF MSOP 16 H $4.44 View
LT8610ABIMSE-3.3#PBF MSOP 16 I $5.90 $4.13 View
LT8610ABIMSE-3.3#TRPBF MSOP 16 I $4.19 View
LT8610ABIMSE-5#PBF MSOP 16 I $5.90 $4.13 View
LT8610ABIMSE-5#TRPBF MSOP 16 I $4.19 View
LT8610ABIMSE#PBF MSOP 16 I $5.90 $4.13 View
LT8610ABIMSE#TRPBF MSOP 16 I $4.19 View
LT8610AEMSE-3.3#PBF MSOP 16 E $5.36 $3.75 View
LT8610AEMSE-3.3#TRPBF MSOP 16 E $3.81 View
LT8610AEMSE-5#PBF MSOP 16 E $5.36 $3.75 View
LT8610AEMSE-5#TRPBF MSOP 16 E $3.81 View
LT8610AEMSE#PBF MSOP 16 E $5.36 $3.75 View
LT8610AEMSE#TRPBF MSOP 16 E $3.81 View
LT8610AHMSE-3.3#PBF MSOP 16 H $6.26 $4.38 View
LT8610AHMSE-3.3#TRPBF MSOP 16 H $4.44 View
LT8610AHMSE-5#PBF MSOP 16 H $6.26 $4.38 View
LT8610AHMSE-5#TRPBF MSOP 16 H $4.44 View
LT8610AHMSE#PBF MSOP 16 H $6.26 $4.38 View
LT8610AHMSE#TRPBF MSOP 16 H $4.44 View
LT8610AIMSE-3.3#PBF MSOP 16 I $5.90 $4.13 View
LT8610AIMSE-3.3#TRPBF MSOP 16 I $4.19 View
LT8610AIMSE-5#PBF MSOP 16 I $5.90 $4.13 View
LT8610AIMSE-5#TRPBF MSOP 16 I $4.19 View
LT8610AIMSE#PBF MSOP 16 I $5.90 $4.13 View
LT8610AIMSE#TRPBF MSOP 16 I $4.19 View
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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.

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
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