LTC3631
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LTC3631

High Efficiency, High Voltage 100mA Synchronous Step-Down Converter

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Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 24
1ku List Price Starting From $3.54
Features
  • Wide Input Voltage Range: Operation from 4.5V to 45V
  • Overvoltage Lockout Provides Protection Up to 60V
  • Internal High Side and Low Side Power Switches
  • No Compensation Required
  • 100mA Output Current
  • Low Dropout Operation: 100% Duty Cycle
  • Low Quiescent Current: 12μA
  • 0.8V ±1% Feedback Voltage Reference
  • Adjustable Peak Current Limit
  • Internal and External Soft-Start
  • Precise RUN Pin Threshold with Adjustable Hysteresis
  • 3.3V, 5V and Adjustable Output Versions
  • Only Three External Components Required for Fixed Output Versions
  • Low Profile (0.75mm) 3mm × 3mm DFN and Thermally-Enhanced MS8E Packages
Additional Details
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The LTC3631 is a high voltage, high efficiency step-down DC/DC converter with internal high side and synchronous power switches that draws only 12μA typical DC supply current at no load while maintaining output voltage regulation.

The LTC3631 can supply up to 100mA load current and features a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. The LTC3631’s combination of Burst Mode® operation, integrated power switches, low quiescent current, and programmable peak current limit provides high efficiency over a broad range of load currents.

With its wide 4.5V to 45V input range and internal overvoltage monitor capable of protecting the part from 60V surges, the LTC3631 is a robust converter suited for regulating a wide variety of power sources. Additionally, the LTC3631 includes a precise run threshold and a soft-start feature to guarantee that power system start-up is well-controlled in any environment.

The LTC3631 is available in the thermally enhanced 3mm × 3mm DFN and MS8E packages.

Applications

  • 4mA to 20mA Current Loops
  • Industrial Control Supplies
  • Distributed Power Systems
  • Portable Instruments
  • Battery-Operated Devices
  • Automotive Power Systems
Part Models 24
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
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Product Lifecycle

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Jul 28, 2021

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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Nov 8, 2021

- 20_0245

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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Feb 3, 2020

- 20_0128

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

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Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

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LTC3631IMS8E-3.3#PBF

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PRODUCTION

Nov 8, 2021

- 20_0245

arrow down

Notification of Wafer Fab Location Change for 0.6µm BICMOS Process Devices from ADI Milpitas (Hillview) to Vanguard Int. (Taiwan)

LTC3631EDD-5#PBF

PRODUCTION

LTC3631EDD-5#TRPBF

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LTC3631IMS8E-5#TRPBF

PRODUCTION

Feb 3, 2020

- 20_0128

arrow down

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

LTC3631EMS8E#PBF

PRODUCTION

LTC3631EMS8E#TRPBF

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LTC3631EMS8E-3.3#PBF

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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

reference details image

DC1499A

LTC3631EDD Demo Board | 60V Transients, 4.5V ≤ VIN ≤ 45V, VOUT = 1.8V/3.3V/5V @ 100mA

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DC1499A

LTC3631EDD Demo Board | 60V Transients, 4.5V ≤ VIN ≤ 45V, VOUT = 1.8V/3.3V/5V @ 100mA

LTC3631EDD Demo Board | 60V Transients, 4.5V ≤ VIN ≤ 45V, VOUT = 1.8V/3.3V/5V @ 100mA

Product Detail

Demonstration circuit DC1499A is a high efficiency step-down DC/DC converter featuring LTC3631 with internal high side and synchronous power switches that draws only 12μA quiescent current. It has a wide 4.5V to 45V input range and internal over voltage monitor capable of protecting the part through 60V surges. The jumper selectable output is up to 5V. LTC3631 can supply up to 100mA load current with a programmable peak current limit that provides a simple method for optimizing efficiency in lower current applications. With no compensation required, LTC3631 is easily configured with minimal components.

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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