LT8606 - 42V, 350mA Synchronous Step-Down Regulator with 2.5μA Quiescent Current

Features

  • Wide Input Voltage Range: 3.0V to 42V
  • Ultralow Quiescent Current Burst Mode® Operation:
    <2.5μA IQ Regulating 12VIN to 3.3VOUT
    Output Ripple <10mVP-P
  • High Efficiency 2MHz Synchronous Operation:
  • >92% Efficiency at 0.5A, 5VOUT from 12VIN
  • 350mA Maximum Continuous Output
  • Fast Minimum Switch-On Time: 45ns
  • Adjustable and Synchronizable: 200kHz to 2.2MHz
  • Spread Spectrum Frequency Modulation for Low EMI
  • Allows Use of Small Inductors
  • Low Dropout
  • Peak Current Mode Operation
  • Accurate 1V Enable Pin Threshold
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Small 10-Lead MSOP Package or 8-Lead 2mm × 2mm DFN Package

Typical Application

LT8606 Typical Application
LT8606 Typical Application

Description

The LT®8606 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 1.7μA of non-switching quiescent current. The LT8606 can deliver 350mA 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 below 10mVP-P. 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 LT8606 reducing the input supply current to 1μA. The PG pin signals when VOUT is within ±8.5% of the programmed output voltage as well as fault conditions.

The LT8606 in the 10-lead MSOP allows selection of low IQ Burst Mode operation, pulse skip or spread spectrum operation for low EMI, and can be synchronized to an external clock. The 8-lead 2mm × 2mm DFN package operates in Burst Mode operation. The MSOP has programmable soft-start and tracking.

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
LT8606EMSE#PBF MS-10E MSE E 05-08-1664 Yes
LT8606EMSE#TRPBF MS-10E MSE E 05-08-1664 Yes
LT8606IMSE#PBF MS-10E MSE I 05-08-1664 Yes
LT8606IMSE#TRPBF MS-10E MSE I 05-08-1664 Yes


LT8606 Package Drawing
LT8606 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
LT8606EMSE#PBF MS-10E E $2.93 $2.05 Yes
LT8606EMSE#TRPBF MS-10E E $2.99 $2.11 Yes
LT8606IMSE#PBF MS-10E I $3.23 $2.26 Yes
LT8606IMSE#TRPBF MS-10E I $3.29 $2.32 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

  • General Purpose Step Down
  • Low EMI Step Down

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Design Tools

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:
LT8606

Technical Support