LT3684
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LT3684

36V, 2A, 2.8MHz Step-Down Switching Regulator

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Info: : PRODUCTION tooltip
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Part Details
Part Models 8
1ku List Price Starting From $3.54
Features
  • Wide Input Range: 3.6V to 34V Operating, 36V Maximum
  • 2A Maximum Output Current
  • Adjustable Switching Frequency: 300kHz to 2.8MHz
  • Low Shutdown Current: IQ < 1µA
  • Integrated Boost Diode
  • Power Good Flag
  • Saturating Switch Design: 0.18Ω On-Resistance
  • 1.265V Feedback Reference Voltage
  • Output Voltage: 1.265V to 20V
  • Soft-Start Capability
  • Small 10-Pin Thermally Enhanced MSOP and (3mm × 3mm) DFN Packages
Additional Details
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The LT3684 is an adjustable frequency (300kHz to 2.8MHz) monolithic buck switching regulator that accepts input voltages up to 34V (36V maximum). A high efficiency 0.18Ω switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. Current mode topology is used for fast transient response and good loop stability. The LT3684’s high operating frequency allows the use of small, low cost inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 90% of the programmed output voltage. The LT3684 is available in 10-Pin MSOP and 3mm × 3mm DFN packages with Exposed Pads for low thermal resistance.

Applications

  • Automotive Battery Regulation
  • Power for Portable Products
  • Distributed Supply Regulation
  • Industrial Supplies
  • Wall Transformer Regulation
Part Models 8
1ku List Price Starting From $3.54

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3684EDD#PBF
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LT3684EMSE#PBF
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LT3684EMSE#TRPBF
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LT3684IDD#PBF
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LT3684IDD#TRPBF
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LT3684IMSE#PBF
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Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Jul 12, 2022

- 22_0157

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Jun 21, 2022

- 22_0050

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

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0130

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Filter by Model

reset

Reset Filters

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Jul 12, 2022

- 22_0157

arrow down

UTAC Thai Limited (UTL) as Alternate Assembly Site for MSOP Packages [With Modification in BOM]

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Jun 21, 2022

- 22_0050

arrow down

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

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Feb 4, 2020

- 20_0130

arrow down

Laser Top Mark Conversion for 10-Lead MSOP Packages Assembled in ADPG and UTAC

LT3684EMSE#PBF

PRODUCTION

LT3684EMSE#TRPBF

PRODUCTION

LT3684IMSE#PBF

PRODUCTION

LT3684IMSE#TRPBF

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1188A

LT3684EMSE Demo Board | 4.5V ≤ VIN ≤ 34V, VOUT = 3.3V @ 2A

Tools & Simulations

Tools & Simulations 1

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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