LM2743

ACTIVE

2.2-V to 16-V, voltage mode synchronous buck controller with tracking

A newer version of this product is available

open-in-new Compare alternates
This product continues to be available for existing customers. New designs should consider an alternate product.
Similar functionality to the compared device
NEW TPS54KB20 ACTIVE 4-V to 16-V input, 25-A remote sense synchronous step-down converter Higher power density integrated FET converter solution for up to 25A output current

Product details

Vin (min) (V) 2.2 Vin (max) (V) 16 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 13.5 Features Enable, Power good, Synchronous Rectification, Tracking Iq (typ) (µA) 1500 Duty cycle (max) (%) 80 Number of phases 1
Vin (min) (V) 2.2 Vin (max) (V) 16 Iout (max) (A) 20 Operating temperature range (°C) -40 to 125 Control mode Voltage mode Topology Buck Rating Catalog Vout (min) (V) 0.6 Vout (max) (V) 13.5 Features Enable, Power good, Synchronous Rectification, Tracking Iq (typ) (µA) 1500 Duty cycle (max) (%) 80 Number of phases 1
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

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* Data sheet LM2743 2.2-V to 16-V Input, voltage mode, synchronous buck controller with tracking datasheet (Rev. I) PDF | HTML 20 Feb 2019

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
Information included:
  • Fab location
  • Assembly location

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