LT3500
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LT3500

Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller

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LTspice LT3500 Demo Circuit - Monolithic 2A Step-Down Regulator Plus LDO (24V to 5V @ 1A & 3.3V @ 1A) Download 3.00KB LTspice LT3500 - PMIC and Multifunction Download 3.42 KB
Part Models 12
1ku List Price Starting From $3.89
Features
  • Wide Input Range: 3V to 36V Operating, 40V Maximum
  • Short-Circuit Protected Over Full Input Range
  • 2A Output Current Capability
  • Adjustable/Synchronizable Fixed Frequency Operation from 250kHz to 2.2MHz
  • Soft-Start/Tracking Capability
  • Output Adjustable Down to 0.8V
  • Adjustable Linear Regulator/Driver with 13mA Output Capability
  • Power Good Comparator with Complimentary Outputs
  • Low Shutdown Current: 12μA
  • Thermally Enhanced 3mm × 3mm DFN or 16-Pin MSOP Package
Additional Details
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The LT3500 is a current mode PWM step-down DC/DC converter with an internal 2.3A switch. The wide input range of 3V to 40V makes the LT3500 suitable for regulating power from a wide variety of sources, including automotive batteries, 24V industrial supplies and unregulated wall adapters.

Resistor-programmable 250kHz to 2.2MHz frequency range and synchronization capability enable optimization between efficiency and external component size. Cycle-by-cycle current limit, frequency foldback and thermal shutdown provide protection against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminating input current surge during start-up, and also provides output tracking.

The LT3500 contains an internal NPN transistor with feedback control which can be configured as a linear regulator or as a linear regulator controller.

The LT3500’s low current shutdown mode (<12μA) enables easy power management in battery-powered systems.

Applications

  • Automotive Battery Regulation
  • Industrial Control
  • Wall Transformer Regulation
  • Distributed Power Regulation
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Documentation View All Documentation
LTspice LT3500 Demo Circuit - Monolithic 2A Step-Down Regulator Plus LDO (24V to 5V @ 1A & 3.3V @ 1A) Download 3.00KB LTspice LT3500 - PMIC and Multifunction Download 3.42 KB
Part Models 12
1ku List Price Starting From $3.89
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LT3500

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UPDATED 01/21/2011
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LT3500: Monolithic 2A Step-Down Regulator Plus Linear Regulator/Controller Data Sheet

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UPDATED 01/26/2009
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LT3500: リニア･レギュレータ/コントローラ付きモノリシック2A降圧レギュレータ データシート

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Documentation

Documentation

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LT3500EDD#PBF 12-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3500EMSE#PBF 16-Lead MSOP w/ EP external-link
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LT3500EMSE#TRPBF 16-Lead MSOP w/ EP external-link
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LT3500HDD#PBF 12-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3500HDD#TRPBF 12-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3500HMSE#PBF 16-Lead MSOP w/ EP external-link
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LT3500HMSE#TRPBF 16-Lead MSOP w/ EP external-link
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LT3500IDD#PBF 12-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3500IDD#TRPBF 12-Lead DFN (3mm x 3mm w/ EP) external-link
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LT3500IMSE#PBF 16-Lead MSOP w/ EP external-link
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LT3500IMSE#TRPBF 16-Lead MSOP w/ EP external-link
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Jun 5, 2024

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

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Feb 4, 2020

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

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Jun 5, 2024

- 24_0003

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

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LT3500EMSE#TRPBF

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LT3500HMSE#PBF

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LT3500HMSE#TRPBF

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LT3500IMSE#PBF

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LT3500IMSE#TRPBF

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PCN24_0003_Form

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xls

Material_Report

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pdf

Qualification Results Summary

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xlsm

Delta Qualification Matrix

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Feb 4, 2020

- 20_0132

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

LT3500EMSE#PBF

PRODUCTION

LT3500EMSE#TRPBF

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LT3500HMSE#PBF

PRODUCTION

LT3500HMSE#TRPBF

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LT3500IMSE#PBF

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Evaluation Kit

Evaluation Kits 1

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DC1069A

LT3500EDD | 36V (40V Transient) 2.2MHz Step-Down Switching Regulator

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DC1069A

LT3500EDD | 36V (40V Transient) 2.2MHz Step-Down Switching Regulator

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DC1069A
LT3500EDD | 36V (40V Transient) 2.2MHz Step-Down Switching Regulator
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Product Detail

Demo circuit 1069A is a monolithic step-down switching regulator with LDO featuring LT3500. The demo circuit is designed for 5.0V and 3.3V outputs from a 6V to 36V input. The LDO output is configured as a post-regulator of the switching regulator output. The total current capability is up to 2A. The switching regulator can be synchronized to an external clock input or be resistor-programmed to a 250kHz to 2.2MHz internal oscillator. Programmable frequency allows for optimization between efficiency and external component size.

Cycle-by-cycle current limit, frequency foldback and thermal shutdown provide protections against a shorted output. The soft-start feature controls the ramp rate of the output voltage, eliminates input current surge during startup, and also provides output tracking.

Resources

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DC1069A - Schematic Download

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DC1069A - Design File Download

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DC1069A - Demo Manual Download

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Evaluation Kits1

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DC1069A

LT3500EDD | 36V (40V Transient) 2.2MHz Step-Down Switching Regulator
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.

spice tool Lt Spice

LT3500 Demo Circuit - Monolithic 2A Step-Down Regulator Plus LDO (24V to 5V @ 1A & 3.3V @ 1A) Download

3.00K

spice tool Lt Spice

LT3500 - PMIC and Multifunction Download

3.42 K

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