IC manufacturers Texas Instruments

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Texas Instruments LM2743-Q1

LM2743 Low Voltage N-Channel MOSFET Synchronous Buck Regulator Controller

Overview

TopologyBuck Converter
Input voltage3.3 V
Switching frequency50-1000 kHz
Output 11 V / 15 A
IC revisionH

Description

The LM2743 is a high-speed synchronous buck regulator controller with an accurate feedback voltage accuracy of ±2%. It can provide simple downconversion to output voltages as low as 0.6V. Though the control sections of the IC are rated for 3 to 6V, the driver sections are designed to accept input supply rails as high as 16V. 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 costeffectiveoption 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 asimple, 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 under-voltage lockout (UVLO) and Power Good (based on both under-voltage and over-voltage detection). Inaddition, the shutdown pin of the IC can be used for providing startup delay, and the soft-start pin can be used for implementing precise tracking, for the purpose of sequencing with respect to an external rail.

Features

  • Power Stage Input Voltage from 1V to 16V
  • Control Stage Input Voltage from 3V to 6V
  • Output Voltage Adjustable down to 0.6V
  • Power Good Flag and Shutdown
  • Output Over-Voltage and Under-Voltage 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

Typical applications

  • Cable Modem
  • Ink Jet Printers
  • Laser Jet Printers
  • 3.3V Buck Regulation
  • DSL
  • ASIC
  • Low Voltage Power Modules
  • Core and I/O
  • DSP
  • ADSL

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
Material Samples
744313068SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

8 files Active i| Production is active. Expected lifetime: >10 years.WE-HCI SMT Flat Wire High Current Inductor 0.68 38.5 13 40 1.58 90 Superflux
Order Code Data­sheet Simu­lation
744313068SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesL
(µH)
IRP,40K
(A)
ISAT,10%
(A)
ISAT,30%
(A)
RDC
(mΩ)
fres
(MHz)
Material Samples