LTC3626

RECOMMENDED FOR NEW DESIGNS

LTC3626

20V, 2.5A Synchronous Monolithic Step-Down Regulator with Current and Temperature Monitoring

RECOMMENDED FOR NEW DESIGNS

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1ku List Price Starting From $4.13

Features

3.6V to 20V Input Voltage Range
Wide Output Voltage Range of 0.6V to 97% V_IN Optimized for 0.6V to 6V
Low R_DS(ON) Integrated Switches Provide Up to 95% Efficiency
Up to 2.5A of Output Current
Average Input and Output Current Monitoring
Programmable Average Input/Output Current Limit
Die Temperature Monitor and Programmable Limit
Adjustable Switching Frequency: 500kHz to 3MHz
External Frequency Synchronization
Current Mode Operation for Excellent Line and Load Transient Response
0.6V Reference with 1% Accuracy Over Temperature
User Selectable Burst Mode^® or Forced Continuous Operation
Short-Circuit Protected
Output Voltage Tracking Capability
Power Good Status Output
Available in Small, Thermally Enhanced, 20-Lead (3mm × 4mm) QFN Package

Additional Details

The LTC3626 is a high efficiency, monolithic synchronous buck regulator using a phase-lockable controlled on-time, current mode architecture capable of supplying up to 2.5A of output current. The operating supply voltage range is 3.6V to 20V, making it suitable for a wide range of power supply applications.

The operating frequency is programmable from 500kHz to 3MHz with an external resistor allowing the use of small surface mount inductors. For applications sensitive to switching noise, the LTC3626 can be externally synchronized over the same frequency range. An internal phase-locked loop aligns the on-time of the top power MOSFET to the internal or external clock. This unique controlled on-time architecture is ideal for high step-down ratio applications that demand high switching frequencies and fast transient response. An internal phase lock loop servos the on-time of the internal one-shot timer to match the frequency of the internal clock or an applied external clock.

The LTC3626 offers two operational modes: Burst Mode and forced continuous mode to allow the user to optimize output voltage ripple, noise and light load efficiency for a given application.

Applications

Distributed Power Systems
Battery-Powered Instruments
Point-of-Load Power Supply

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Ask a Question

Submit your question below and we will return the best answer from ADI’s knowledge database:

Other places you can find help

Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $4.13

Technical Documents 5

LTC3626: 20V, 2.5A Synchronous Monolithic Step-Down Regulator with Current and Temperature Monitoring Data Sheet 06/04/2015

R539 Reliability Data 03/26/2018

DC1768A - Demo Manual 03/14/2013

Design Note 511: 20V, 2.5A Monolithic Synchronous Buck SWITCHER+ with Input Current, Output Current and Temperature Sensing/Limiting Capabilities 02/01/2013

20V, 2.5A Synchronous Monolithic Buck with Current and Temperature Monitoring 01/01/2013

Reference Materials 1

LTC3626 - 20V, 2.5A SWITCHER+ 03/04/2013

Design Resources 4

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
LTC3626EUDC#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3626EUDC#TRPBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3626IUDC#PBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3626IUDC#TRPBF	20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3626EUDC#PBF
Pin/Package Drawing
20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3626EUDC#TRPBF
Pin/Package Drawing
20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3626IUDC#PBF
Pin/Package Drawing
20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

LTC3626IUDC#TRPBF
Pin/Package Drawing
20-Lead QFN (3mm x 4mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

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DC1768A

LTC3626EUDC Demo Board | 3.6V ≤ VIN ≤ 20V, VOUT = 0.6V @ 6V 2.5A, Current and Temp Monitoring

LTC3626EUDC Demo Board | 3.6V ≤ VIN ≤ 20V, VOUT = 0.6V @ 6V 2.5A, Current and Temp Monitoring

Download

DC1768A

LTC3626EUDC Demo Board | 3.6V ≤ VIN ≤ 20V, VOUT = 0.6V @ 6V 2.5A, Current and Temp Monitoring

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Product Detail

Demonstration circuit 1768A is a step-down converter, using the LTC3626 monolithic synchronous buck regulator, which has current and temperature monitoring capabilities. The 1768A has an input voltage range of 3.6V to 20V, and is capable of delivering up to 2.5A of output current. The output voltage range of the 1768A is 6V down to 0.6V.

Resources

PDF

DC1768A - Demo Manual

510.00K

ZIP

DC1768A - Design Files

903.00K

PDF

DC1768A - Schematic

66.00K

DC1768A

LTC3626EUDC Demo Board | 3.6V ≤ VIN ≤ 20V, VOUT = 0.6V @ 6V 2.5A, Current and Temp Monitoring

LTspice 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.

Lt Spice

LTC3626 - Step-Down (Buck) Regulators

2.4 K

Lt Spice

LTC3626 Demo Circuit - 2.5V, 1MHz Step-Down with Average Input Current Limit & Monitor (3.6-20V to 2.5V @ 2.5A)

4.00K

LTpowerCAD 1

LTpowerCAD^® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.

To open the project file for this circuit:

Step 1: Download and install LTpowerCAD on your computer.

Step 2: Click on the link(s) in the section below to download part-specific project files.

Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.

LTpowerCAD download and documentation