Product details

We are not able to display this information. Please refer to the product   data sheet .
TSSOP (PW) 14 32 mm² 5 x 6.4
  • Power stage input voltage from 1 V to 16 V
  • Control stage input voltage from 3 V to 6 V
  • Output voltage adjustable down to 0.6 V
  • Power-good flag and shutdown
  • Output overvoltage and undervoltage detection
  • ±2% Feedback voltage accuracy over temperature
  • Low-side adjustable current sensing
  • Adjustable soft start
  • Tracking and sequencing with shutdown and soft-start pins
  • Switching frequency from 50 kHz to 1 MHz
  • TSSOP-14 package
  • Create a custom design using the LM2743 with the WEBENCH® Power Designer
  • Power stage input voltage from 1 V to 16 V
  • Control stage input voltage from 3 V to 6 V
  • Output voltage adjustable down to 0.6 V
  • Power-good flag and shutdown
  • Output overvoltage and undervoltage detection
  • ±2% Feedback voltage accuracy over temperature
  • Low-side adjustable current sensing
  • Adjustable soft start
  • Tracking and sequencing with shutdown and soft-start pins
  • Switching frequency from 50 kHz to 1 MHz
  • TSSOP-14 package
  • Create a custom design using the LM2743 with the WEBENCH® Power Designer

The LM2743 is a high-speed synchronous buck regulator controller with an accurate feedback voltage accuracy of ±2%. It can provide simple down conversion to output voltages as low as 0.6 V. Though the control sections of the IC are rated for 3 V to 6 V, the driver sections are designed to accept input supply rails as high as 16 V. The use of adaptive non-overlapping MOSFET gate drivers helps avoid potential shoot-through problems while maintaining high efficiency. The IC is designed for the more cost-effective option of driving only N-channel MOSFETs in both the high-side and low-side positions. It senses the low-side switch voltage drop for providing a simple, adjustable current limit.

The fixed-frequency voltage-mode PWM control architecture is adjustable from 50 kHz to 1 MHz with one external resistor. This wide range of switching frequency gives the power supply designer the flexibility to make better tradeoffs between component size, cost and efficiency.

Features include soft start, input undervoltage lockout (UVLO) and Power Good (based on both undervoltage and overvoltage detection). In addition, the shutdown pin of the IC can be used for providing start-up delay, and the soft-start pin can be used for implementing precise tracking, for the purpose of sequencing with respect to an external rail.

The LM2743 is a high-speed synchronous buck regulator controller with an accurate feedback voltage accuracy of ±2%. It can provide simple down conversion to output voltages as low as 0.6 V. Though the control sections of the IC are rated for 3 V to 6 V, the driver sections are designed to accept input supply rails as high as 16 V. The use of adaptive non-overlapping MOSFET gate drivers helps avoid potential shoot-through problems while maintaining high efficiency. The IC is designed for the more cost-effective option of driving only N-channel MOSFETs in both the high-side and low-side positions. It senses the low-side switch voltage drop for providing a simple, adjustable current limit.

The fixed-frequency voltage-mode PWM control architecture is adjustable from 50 kHz to 1 MHz with one external resistor. This wide range of switching frequency gives the power supply designer the flexibility to make better tradeoffs between component size, cost and efficiency.

Features include soft start, input undervoltage lockout (UVLO) and Power Good (based on both undervoltage and overvoltage detection). In addition, the shutdown pin of the IC can be used for providing start-up delay, and the soft-start pin can be used for implementing precise tracking, for the purpose of sequencing with respect to an external rail.

Download

Similar products you might be interested in

Similar functionality to the compared device.
LM27403 ACTIVE 3-V to 20-V voltage-mode synchronous buck controller and temperature-compensated DCR current sensing This product has temperature-compensated DCR current sensing and is in a smaller WQFN package.

Technical documentation

star = Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 10
Type Title Date
* Data sheet LM2743 2.2-V to 16-V Input, voltage mode, synchronous buck controller with tracking datasheet (Rev. I) 20 Feb 2019
User guide LM2744 Buck Controller Evaluation Module User's Guide (Rev. B) 23 Feb 2022
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Analog Design Journal Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 21 Jul 2016
Application note AN-1603 LM274X Reference Designs (Rev. C) 01 May 2013
EVM User's guide AN-1356 LM2743 Evaluation Board (Rev. A) 30 Apr 2013
EVM User's guide AN-1640 LM2743-19A Demo Board (Rev. A) 26 Apr 2013
Application note Current Limit Foldback Improves Short Circuit Protection in LM274X Family (Rev. B) 23 Apr 2013
Application note Optmiz Pwr Cntrlr Dsigns thru Utiliz Freq & Sync, Ext Ref, Trking & Precis EN 24 Apr 2008
Application note Power Management Considerations for FPGAs and ASICs 22 Mar 2007

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM2743-19AEVAL — Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller Evaluation Module

This application notes describes the LM2743 printed circuit board (PCB) design and provides an example typical application circuit. The LM2743 is a voltage mode PWM buck controller which implements synchronous rectification. It provides a low cost, high power density, and efficient point of load (...)

Evaluation board

LM2743EVAL — Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller Evaluation Module

LM2743 N-Channel FET Synchronous Buck Regulator Controller for Conversion from 3.3V

Simulation model

LM2743 PSpice Transient Model

SNVM431.ZIP (226 KB) - PSpice Model
Simulation model

LM2743 PSpice Average Model

SNVM432.ZIP (58 KB) - PSpice Model
Simulation model

LM2743 Unencrypted PSpice Transient Model

SNVM845.ZIP (3 KB) - PSpice Model
Simulation model

LM2743 Unencrypted PSpice Average Model

SNVM846.ZIP (1 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Reference designs

PMP30197 — 5.85W Isolated Self-Driven Synchronous Inverting Fly-Buckboost with Optocoupler Reference Design

The PMP30197 reference design is an inverting Fly-BuckBoost power supply using the LM2743 to generate an isolated output voltage of 3.9V. The design accepts an input voltage of 2V to 5.25V.  The converter regulates the secondary side output with an optocoupler and is capable of achieving good (...)
Package Pins Download
TSSOP (PW) 14 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos