LTC3601

PRODUCTION

LTC3601

1.5A, 15V Monolithic Synchronous Step-Down Regulator

PRODUCTION

Efﬁ ciency and Power Loss vs Load Current slide

Efﬁ ciency and Power Loss vs Load Current

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Part Models 8

1ku List Price Starting From $2.78

Features

4V to 15V Operating Input Voltage Range
1.5A Output Current
Up to 96% Efficiency
Very Low Duty Cycle Operation: 5% at 2.25MHz
Adjustable Switching Frequency: 800kHz to 4MHz
External Frequency Synchronization
Current Mode Operation for Excellent Line and Load Transient Response
User Selectable Burst Mode^® (No Load I_Q = 300μA) or Forced Continuous Operation
0.6V Reference Allows Low Output Voltages
Short-Circuit Protected
Output Voltage Tracking Capability
Programmable Soft-Start
Power Good Status Output
Available in Small, Thermally Enhanced, 16-Pin QFN (3mm × 3mm) and MSOP Packages

Additional Details

The LTC3601 is a high efficiency, monolithic synchronous buck regulator using a phase-lockable controlled on-time, current mode architecture capable of supplying up to 1.5A of output current. The operating supply voltage range is from 4V to 15V, making it suitable for a wide range of power supply applications.

The operating frequency is programmable from 800kHz to 4MHz with an external resistor enabling the use of small surface mount inductors. For switching noise sensitive applications, the LTC3601 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 constant frequency/ controlled on-time architecture is ideal for high step-down ratio applications that demand high switching frequencies and fast transient response.

The LTC3601 offers two operational modes: Burst Mode operation and forced continuous mode to allow the user to optimize output voltage ripple, noise, and light load efficiency for a given application. Maximum light load efficiency is achieved with the selection of Burst Mode operation while forced continuous mode provides minimum output ripple and constant frequency operation.

Applications

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

View All Documentation

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 8

1ku List Price Starting From $2.78

Technical Documents 5

LTC3601: 1.5A, 15V Monolithic Synchronous Step-Down Regulator Data Sheet 08/11/2015

R539 Reliability Data 03/26/2018

DC1353A - Demo Manual 10/16/2009

DC1454A - Demo Manual 11/13/2009

Two Monolithic DC/DC Converters Take 3.6V–15V Inputs Down to 0.6V at High Frequency, Shrinking Battery-Powered Applications in Everything from Handhelds to Automobiles 07/01/2011

Design Resources 8

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
LTC3601EMSE#PBF	16-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601EMSE#TRPBF	16-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601EUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601EUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601IMSE#PBF	16-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601IMSE#TRPBF	16-Lead MSOP w/ EP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601IUD#PBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3601IUD#TRPBF	16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3601EMSE#PBF
Pin/Package Drawing
16-Lead MSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601EMSE#TRPBF
Pin/Package Drawing
16-Lead MSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601EUD#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601EUD#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601IMSE#PBF
Pin/Package Drawing
16-Lead MSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601IMSE#TRPBF
Pin/Package Drawing
16-Lead MSOP w/ EP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601IUD#PBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3601IUD#TRPBF
Pin/Package Drawing
16-Lead QFN (3mm x 3mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

PCN/PDN Information

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LTC3601EMSE#PBF

PRODUCTION

LTC3601EMSE#TRPBF

PRODUCTION

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Feb 4, 2020

- 20_0132

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

LTC3601EMSE#PBF

PRODUCTION

LTC3601EMSE#TRPBF

PRODUCTION

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN20_0132_Form

xls

Material_Report

Jul 12, 2022

- 22_0157

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

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN22_0157_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Detailed Parts List

Jun 21, 2022

- 22_0050

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

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN22_0050_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Filter by Model

Part Models

Product Lifecycle

PCN

Oct 11, 2022

- 22_0244

Epoxy Change from Henkel 8290 to 8290A for MSOP Package

LTC3601EMSE#PBF

PRODUCTION

LTC3601EMSE#TRPBF

PRODUCTION

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN22_0244_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Feb 4, 2020

- 20_0132

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

LTC3601EMSE#PBF

PRODUCTION

LTC3601EMSE#TRPBF

PRODUCTION

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN20_0132_Form

xls

Material_Report

Jul 12, 2022

- 22_0157

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

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN22_0157_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Detailed Parts List

Jun 21, 2022

- 22_0050

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

LTC3601IMSE#PBF

PRODUCTION

LTC3601IMSE#TRPBF

PRODUCTION

pdf

PCN22_0050_Form

xls

Material_Report

pdf

Qualification Results Summary

xlsm

Delta Qualification Matrix

Companion Parts 4

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LTC2991	RECOMMENDED FOR NEW DESIGNS	Octal I²C Voltage, Current, and Temperature Monitor
Dual-Supply Monitors1
LTC2960	RECOMMENDED FOR NEW DESIGNS	36V Nano-Current Two-Input Voltage Monitor
Multiple Output Buck Regulators1
LTC3880	RECOMMENDED FOR NEW DESIGNS	Dual Output PolyPhase Step-Down DC/DC Controller with Digital Power System Management

Alternative Parts 1

Parts	Product Life Cycle	Description
LTC3603	PRODUCTION	2.5A, 15V Monolithic Synchronous Step-Down Regulator

DC1454A

LTC3601EMSE Demo Board (MSOP) | 4V ≤ VIN ≤ 15V, VOUT = 1.2V/1.8V/3.3V @ 1.5A

DC1454A

LTC3601EMSE Demo Board (MSOP) | 4V ≤ VIN ≤ 15V, VOUT = 1.2V/1.8V/3.3V @ 1.5A

Buy Now View Details

Product Detail

Demonstration circuit 1353 is a step-down converter, using the LTC3601 monolithic synchronous buck regulator in the 16-lead MSOP exposed pad package. The DC1353A has a maximum input voltage 15V, and is capable of delivering up to 1.5A of output current at a minimum input voltage of 4V. The output voltage of the DC1353A can be set as low as 0.6V, the reference voltage of the LTC3601. At low load currents, the DC1353A operates in discontinuous mode, and during shutdown, it consumes less than 40 uA of quiescent current.

Resources

ZIP

DC1454A - Design Files

2.00M

PDF

DC1454A - Schematic

53.00K

PDF

DC1454A - Demo Manual

693.00K

DC1353A

LTC3601EUD Demo Board (QFN) | 4V ≤ VIN ≤ 15V, VOUT = 1.2V/1.8V/3.3V @ 1.5A

DC1353A

LTC3601EUD Demo Board (QFN) | 4V ≤ VIN ≤ 15V, VOUT = 1.2V/1.8V/3.3V @ 1.5A

Buy Now View Details

Product Detail

Demonstration circuit 1353 is a step-down converter, using the LTC3601 monolithic synchronous buck regulator in the 3mm x 3mm QFN-16 package. The DC1353A has a maximum input voltage 15V, and is capable of delivering up to 1.5A of output current at a minimum input voltage of 4V. The output voltage of the DC1353A can be set as low as 0.6V, the reference voltage of the LTC3601. At low load currents, the DC1353A operates in discontinuous mode, and during shutdown, it consumes less than 40 uA of quiescent current.

Resources

PDF

DC1353A - Schematic

83.00K

PDF

DC1353A - Demo Manual

657.00K

ZIP

DC1353A - Design Files

2.00M

DC1454A

LTC3601EMSE Demo Board (MSOP) | 4V ≤ VIN ≤ 15V, VOUT = 1.2V/1.8V/3.3V @ 1.5A

DC1353A

LTC3601EUD Demo Board (QFN) | 4V ≤ VIN ≤ 15V, VOUT = 1.2V/1.8V/3.3V @ 1.5A

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

LTC3601 - Step-Down (Buck) Regulators

1.86 K

Lt Spice

LTC3601 Demo Circuit - 1.5A, 15V Synchronous Step-down Regulator (12V to 1.2V @ 1.5A)

3.00K

LTpowerCAD 2

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