LT8619 - 60V, 1.2A Synchronous Monolithic Buck Regulator with 6μA Quiescent Current


  • Wide Input Voltage Range: 3V to 60V
  • Fast Minimum Switch-On Time: 30ns
  • Ultralow Quiescent Current Burst Mode Operation:
    • 6μA IQ Regulating 12VIN to 3.3VOUT
    • 10mVP-P Output Ripple at No Load
  • Synchronizable/Programmable Fixed Frequency Forced Continuous Mode Operation: 300kHz to 2.2MHz
  • High Efficiency Synchronous Operation:
    • 92% Efficiency at 0.5A, 5VOUT from 12VIN
    • 90% Efficiency at 0.5A, 3.3VOUT from 12VIN
  • Low Dropout: 360mV at 0.5A
  • Low EMI
  • Accurate 1V Enable Pin Threshold
  • Internal Soft-Start and Compensation
  • Power Good Flag
  • Small Thermally Enhanced 16-Lead MSOP Package and 10-Lead (3mm × 3mm) DFN Packages

Typical Application

LT8619 Typical Application
LT8619 Typical Application


The LT®8619 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 6μA of quiescent current. The LT8619 can deliver 1.2A of continuous 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 to 10mVP-P. A SYNC pin allows forced continuous mode operation synchronized 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 LT8619, reducing the input supply current to below 0.6μA. The PG flag signals when VOUT is within ±7.5% of the programmed output voltage. The LT8619 is available in a small 16-lead MSOP and 10-lead 3mm × 3mm DFN packages with exposed pad for low thermal resistance.


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

Part Number Package Code Temp Package
LT8619EDD#PBF 3x3 DFN-10 DD E 05-08-1699 Yes
LT8619EDD#TRPBF 3x3 DFN-10 DD E 05-08-1699 Yes
LT8619EMSE-5#PBF MS-16E MSE E 05-08-1667 Yes
LT8619EMSE-5#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8619EMSE#PBF MS-16E MSE E 05-08-1667 Yes
LT8619EMSE#TRPBF MS-16E MSE E 05-08-1667 Yes
LT8619IDD#PBF 3x3 DFN-10 DD I 05-08-1699 Yes
LT8619IDD#TRPBF 3x3 DFN-10 DD I 05-08-1699 Yes
LT8619IMSE-5#PBF MS-16E MSE I 05-08-1667 Yes
LT8619IMSE-5#TRPBF MS-16E MSE I 05-08-1667 Yes
LT8619IMSE#PBF MS-16E MSE I 05-08-1667 Yes
LT8619IMSE#TRPBF MS-16E MSE I 05-08-1667 Yes

LT8619 Package Drawing
LT8619 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
LT8619EDD#PBF 3x3 DFN-10 E $3.79 $2.65 Yes
LT8619EDD#TRPBF 3x3 DFN-10 E $3.85 $2.71 Yes
LT8619EMSE-5#PBF MS-16E E $3.92 $2.75 Yes
LT8619EMSE-5#TRPBF MS-16E E $3.98 $2.81 Yes
LT8619EMSE#PBF MS-16E E $3.92 $2.75 Yes
LT8619EMSE#TRPBF MS-16E E $3.98 $2.81 Yes
LT8619IDD#PBF 3x3 DFN-10 I $4.17 $2.92 Yes
LT8619IDD#TRPBF 3x3 DFN-10 I $4.23 $2.98 Yes
LT8619IMSE-5#PBF MS-16E I $4.33 $3.03 Yes
LT8619IMSE-5#TRPBF MS-16E I $4.39 $3.09 Yes
LT8619IMSE#PBF MS-16E I $4.33 $3.03 Yes
LT8619IMSE#TRPBF MS-16E I $4.39 $3.09 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.

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