LT3505
Info: : PRODUCTION
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LT3505

1.2A, Step-Down Switching Regulator in 3mm × 3mm DFN

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 8
1ku List Price Starting From $2.90
Features
  • Wide Input Range: 3.6V to 36V Operating, 40V Maximum
  • Up to 1.2A Output Current
  • Resistor-Programmable Fixed-Frequency Operation from 200kHz to 3MHz
  • Output Adjustable Down to 780mV
  • Short-Circuit Robust
  • Uses Tiny Capacitors and Inductors
  • Soft-Start
  • Low Shutdown Current: <2µA
  • Low VCESAT Switch: 350mV at 1A
  • Thermally Enhanced, Low Profile 3mm x 3mm DFN-8 and MSOP-8 Packages
Additional Details
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The LT3505 is a current mode PWM step-down DC/DC converter with an internal 1.4A power switch. The wide operating input range of 3.6V to 36V (40V maximum) makes the LT3505 ideal for regulating power from a wide variety of sources, including unregulated wall transformers, 24V industrial supplies and automotive batteries. The oscillator can be programmed for high frequency operation allowing the use of tiny, low cost external components or it can be programmed for lower frequency operation to maximize efficiency.

Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The low current (<2µA) shutdown mode provides output disconnect, enabling easy power management in battery-powered systems.

Applications

  • Automotive Battery Regulation
  • Industrial Control Supplies
  • Wall Transformer Regulation
  • Distributed Supply Regulation
  • Battery-Powered Equipment
Part Models 8
1ku List Price Starting From $2.90

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3505EDD#PBF
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Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

Jul 12, 2022

- 22_0157

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

Jun 21, 2022

- 22_0050

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

Feb 3, 2020

- 20_0128

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT3505EMS8E#PBF

PRODUCTION

LT3505EMS8E#TRPBF

PRODUCTION

LT3505IMS8E#PBF

PRODUCTION

LT3505IMS8E#TRPBF

PRODUCTION

Jun 5, 2024

- 24_0003

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

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

Jul 12, 2022

- 22_0157

arrow down

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

Jun 21, 2022

- 22_0050

arrow down

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

Feb 3, 2020

- 20_0128

arrow down

Laser Top Mark for 8 Lead MSOP Packages Assembled in ADPG and UTAC

LT3505EMS8E#PBF

PRODUCTION

LT3505EMS8E#TRPBF

PRODUCTION

LT3505IMS8E#PBF

PRODUCTION

LT3505IMS8E#TRPBF

PRODUCTION

Jun 5, 2024

- 24_0003

arrow down

Epoxy Change from Henkel 8290 to 8290A for MSOP Package (2)

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

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DC1395A

LT3505 HV Buck Regulator Board with Plug-in Interface

reference details image

DC1023A

LT3505EDD Demo Board | 6V ≤ VIN ≤ 36V, VOUT = 5V @ 1A

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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