Texas Instruments LM2743MTC/NOPB

Mfr. Part

LM2743MTC/NOPB

Manufacturer

Luminary Micro/Texas Instruments. Y-IC is a quality distributor for TI and we are committed to delivering the best products and services to our customers.

Detailed Description

Synchronous buck (step-down) DC-DC switching controller in a 14-TSSOP package. Operates from a 3V to 6V supply and drives external MOSFETs to generate a positive, regulated output. Single-phase controller with programmable switching frequency from 50kHz to 1MHz. Includes soft-start, current limit, power good, tracking, enable, and frequency control for reliable start-up and protection. Optimized for converting a 5V rail down to low-voltage, high-current loads. RoHS3 compliant. Available in tube packaging. Current inventory: 1515 pieces.

Key Features

Synchronous buck controller for high efficiency

Input supply range 3V to 6V (ideal for 5V systems)

50kHz to 1MHz adjustable switching frequency

Single output, single phase

Positive output configuration

Output type: transistor driver for external MOSFETs

Duty cycle up to 80%

Control features: current limit, enable, frequency control, power good, soft-start, tracking

Junction operating temperature range: -40°C to +125°C

Surface-mount 14-TSSOP footprint

RoHS3 compliant

Key Advantages

High efficiency from synchronous rectification reduces heat and power loss

Wide frequency range lets you balance efficiency, EMI, and size

External MOSFETs allow scalable current capability and flexible design

Robust protection and start-up features improve reliability

Compact 14-TSSOP saves PCB space and simplifies routing

Ideal for stepping down 5V rails to low-voltage digital loads

Proven TI platform with broad ecosystem and documentation

Available now from Y-IC with responsive support

Packaging

Type: Tube (suitable for prototyping and lowto mid-volume assembly)

Material: Antistatic protective tube for safe handling and shipping

Package/Case: 14-TSSOP, 0.173 inch (4.40mm) body width

Supplier Device Package: 14-TSSOP

Pin configuration: 14 leads, standard TSSOP pin pitch; pins support gate drive, feedback, sense, enable, power good, and VCC connections

Mounting: Surface-mount

Thermal characteristics: Junction operating range -40°C to +125°C (TJ); actual thermal performance depends on PCB layout and copper area

Electrical properties (core parameters): VIN 3V to 6V, 1 output phase, synchronous rectifier yes, duty cycle up to 80%, frequency 50kHz to 1MHz, output driver for external MOSFETs

Lifecycle

Status: As of the latest available information, this TI device is an active production product and not near discontinuation.

Equivalent/Alternative models: Close functional alternatives may include LM2743MTCX/NOPB (tape-and-reel packaging variant) and controllers with similar VIN and synchronous buck topology from TI (e.g., LM2742 family, select TPS-series synchronous buck controllers with 3V–6V VIN). Suitability depends on exact specs (VIN range, frequency plan, gate-drive capability, control features). For verified cross-references matched to your design, please contact our sales team via the Y-IC website and we will provide a detailed, application-specific list.

Key Application Areas

Converting 5V rails to low-voltage digital supplies (0.8V–3.3V)

FPGA, ASIC, CPU and DDR memory core rails

Telecom and networking cards powered from 5V backplanes

Industrial control and embedded systems

Storage, servers, set-top boxes, printers, routers, and switches

Point-of-load (POL) regulators in multi-rail systems

Datasheet

Y-IC hosts the most authoritative datasheet for LM2743MTC/NOPB on our product page. Download the datasheet directly here to get full specifications, design guidance, and application notes.

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