LTC3727LX-1

PRODUCTION

LTC3727LX-1

High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator

PRODUCTION

Part Details

Figure 1. High Efficiency Dual 12V/5V Step-Down Converter slide

Figure 1. High Efficiency Dual 12V/5V Step-Down Converter

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Part Models 4

1ku List Price Starting From $5.24

Features

Wide Output Voltage Range: 0.8V ≤ V_OUT ≤ 14V
Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
OPTI-LOOP^® Compensation Minimizes C_OUT
±1.5% Output Voltage Accuracy
Power Good Output Voltage Monitor
Phase-Lockable Fixed Frequency 250kHz to 550kHz
Dual N-Channel MOSFET Synchronous Drive
Wide V_IN Range: 4V to 32V Operation
Very Low Dropout Operation: 99% Duty Cycle
Adjustable Soft-Start Current Ramping
Foldback Output Current Limiting
Output Overvoltage Protection
Low Shutdown I_Q: 20µA
Selectable Constant-Frequency or Burst Mode^® Operation
Small 28-Lead SSOP and 5mm × 5mm QFN Packages

Additional Details

The LTC3727LX-1 is a high performance dual step-down switching regulator controller that drives all N-channel synchronous power MOSFET stages. A constant-frequency current mode architecture allows phase-lockable frequency of up to 550kHz. Power loss and noise due to the ESR of the input capacitors are minimized by operating the two controller output stages out of phase.

OPTI-LOOP compensation allows the transient response to be optimized over a wide range of output capacitance and ESR values. There is a precision 0.8V reference and a power good output indicator. A wide 4V to 28V (32V maximum) input supply range encompasses all battery chemistries.


	V_IN Range	V_REF Accuracy Over Temp	Latch-Off	Min On-Time
LTC3727	4V - 36V	±1%	No	180ns
LTC3727-1	4V - 36V	±1%	Yes	180ns
LTC3727A-1	4V - 36V	±1%	No	120ns
LTC3727LX-1	4V - 32V	±1.5%	No	120ns

Applications

Telecom Systems
Automotive Systems
Distributed DC Power Systems

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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 $5.24

Documentation

Technical Documents 2

LTC3727LX-1: High Efficiency, 2-Phase Synchronous Step-Down Switching Regulator Data Sheet 11/21/2007

R384 Reliability Data 03/26/2018

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
LTC3727LXEG-1#PBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3727LXEG-1#TRPBF	28-Lead SSOP	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3727LXEUH-1#PBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
LTC3727LXEUH-1#TRPBF	32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

LTC3727LXEG-1#PBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3727LXEG-1#TRPBF
Pin/Package Drawing
28-Lead SSOP
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3727LXEUH-1#PBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm x 0.75mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

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

LTC3727LXEUH-1#TRPBF
Pin/Package Drawing
32-Lead QFN (5mm x 5mm 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

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3727LXEG-1#PBF

PRODUCTION

LTC3727LXEG-1#TRPBF

PRODUCTION

pdf

PCN22_0171_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3727LXEUH-1#PBF

PRODUCTION

LTC3727LXEUH-1#TRPBF

PRODUCTION

pdf

PCN21_0269_Form

xls

Material_Report

pdf

Detailed Change Description

pdf

Qualification Results Summary

Filter by Model

Part Models

Product Lifecycle

PCN

Aug 6, 2022

- 22_0171

Laser Top Mark Conversion for SSOP Packages Assembled in PNG

LTC3727LXEG-1#PBF

PRODUCTION

LTC3727LXEG-1#TRPBF

PRODUCTION

pdf

PCN22_0171_Form

xls

Material_Report

xlsm

Delta Qualification Matrix

Jan 20, 2022

- 21_0269

Addition of Alternate Assembly Site ASE Taiwan for Select LFCSP Products

LTC3727LXEUH-1#PBF

PRODUCTION

LTC3727LXEUH-1#TRPBF

PRODUCTION

pdf

PCN21_0269_Form

xls

Material_Report

pdf

Detailed Change Description

pdf

Qualification Results Summary

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Tools & Simulations

LTspice 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.