LT8620
Info : RECOMMENDED FOR NEW DESIGNS
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LT8620

65V, 2A Synchronous Step-Down Regulator with 2.5μA Quiescent Current

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $4.48
Features
  • Wide Input Voltage Range: 3.4V to 65V
  • Ultralow Quiescent Current Burst Mode® Operation:
    • 2.5μA IQ Regulating 12VIN to 3.3VOUT
    •  Output Ripple < 10mVP-P
  • High Efficiency Synchronous Operation:
    • 94% Efficiency at 1A, 12VIN to 5VOUT
    • 92% Efficiency at 1A, 12VIN to 3.3VOUT
  • Fast 30ns Minimum Switch-On Time
  • Low Dropout Under All Conditions: 250mV at 1A
  • Safely Tolerates Inductor Saturation in Overload
  • Low EMI
  • Adjustable and Synchronizable: 200kHz to 2.2MHz
  • Accurate 1V Enable Pin Threshold
  • Internal Compensation
  • Output Soft-Start and Tracking
  • Small Thermally Enhanced 16-Lead MSOP and 24-Lead 3mm × 5mm QFN Packages
Additional Details
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The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that accepts a wide input voltage range up to 65V, and consumes only 2.5μA of quiescent 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. A SYNC pin allows synchronization 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 LT8620 reducing the input supply current to 1μA. A capacitor on the TR/SS pin programs the output voltage ramp rate during start-up. The PG flag signals when VOUT is within ±9% of the programmed output voltage as well as fault conditions. The LT8620 is available in small 16-Lead MSOP and 3mm × 5mm QFN packages with exposed pads for low thermal resistance.

Applications

  • Automotive and Industrial Supplies
  • General Purpose Step-Down
  • GSM Power Supplies
Part Models 12
1ku List Price Starting From $4.48

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

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Feb 4, 2020

- 20_0132

Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

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Apr 11, 2019

- 19_0067

Notification of Wafer Fab Location Change for 0.35 BCD Process

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Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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Apr 18, 2022

- 22_0050

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

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Feb 4, 2020

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Laser Top Mark for 16-Lead MSOP Packages Assembled in ADPG and UTAC

LT8620EMSE#PBF

PRODUCTION

LT8620EMSE#TRPBF

PRODUCTION

LT8620HMSE#PBF

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LT8620HMSE#TRPBF

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Apr 11, 2019

- 19_0067

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Notification of Wafer Fab Location Change for 0.35 BCD Process

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LT8620EMSE#TRPBF

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LT8620EUDD#PBF

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Oct 11, 2022

- 22_0244

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Epoxy Change from Henkel 8290 to 8290A for MSOP Package

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Apr 18, 2022

- 22_0050

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UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages / Devices

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1992A

LT8620 Demo Board | Micropower Synchronous Buck, 5.5V ≤ VIN ≤ 65V, VOUT = 5V @ 2A

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DC1992A

LT8620 Demo Board | Micropower Synchronous Buck, 5.5V ≤ VIN ≤ 65V, VOUT = 5V @ 2A

LT8620 Demo Board | Micropower Synchronous Buck, 5.5V ≤ VIN ≤ 65V, VOUT = 5V @ 2A

Product Detail

Demonstration circuit 1992A is a 65V, 2A micropower synchronous monolithic step-down regulator featuring the LT8620. The LT8620 is a compact, high efficiency, high speed synchronous monolithic step-down switching regulator that consumes only 2.5μA of quiescent current when the output is regulated at 5V. The demo board features a 5.5V to 65V inut voltage range and generates 5V at 2A.


Top and bottom power switches, compensation components and other necessary circuits are inside of the LT8620 to minimize external components and simplify design.

Tools & Simulations

Tools & Simulations 2

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, 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.

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