TI LM2743Q1MX/NOPB

Mfr. Part

LM2743Q1MX/NOPB

Manufacturer

Texas Instruments (Luminary Micro brand heritage)

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Detailed Description

Automotive-grade synchronous-buck PWM controller in a compact 14‑pin TSSOP. Designed to drive external N-channel MOSFETs for high-efficiency step‑down DC/DC conversion. Q1 automotive qualification for rugged use across wide temperature. Ideal for point‑of‑load rails that need fast transient response, precise regulation, and robust protection. Current inventory reference: 3422 units available (subject to prior sale).

Key Features

Automotive AEC‑Q100 qualified Q1 grade for -40°C to +125°C operation

Synchronous buck topology for high efficiency via high/low-side MOSFET control

Adjustable output voltage with low reference (typical sub‑1 V class) for modern digital cores

Fast transient response with external compensation (COMP/FB pins)

Soft‑start and tracking support to control inrush current and sequencing

Programmable current limit/overcurrent protection and thermal considerations

Undervoltage lockout and enable control for predictable start-up/shut-down

Power-good/monitoring functionality available in the family (see datasheet for pinout specifics)

MHz‑class switching frequency capability for smaller magnetics (exact limits per datasheet)

Lead-free NOPB finish, RoHS compliant

Key Advantages

Automotive reliability with Q1 grade and extended temperature range

High efficiency from synchronous rectification and optimized gate drive

Flexible design via external MOSFET selection, compensation, and soft‑start

Tight regulation at low output voltages for CPUs, FPGAs, and ASICs

Small solution size thanks to high-frequency operation and TSSOP footprint

Strong protection feature set lowers risk in harsh environments

Packaging

Type TSSOP-14 (Thin Shrink Small Outline Package, 14 leads)

Material Molded epoxy body over copper leadframe; matte tin lead finish (NOPB, no lead)

Size Typical JEDEC TSSOP-14 body ~4.4 mm width, ~5.0 mm length, ~1.0–1.2 mm height; 0.65 mm lead pitch (refer to TI mechanical drawing for exact dimensions)

Pin configuration 14 pins including typical functions for synchronous controllers such as VCC bias, BOOT (high-side bootstrap), UGATE (high-side gate), LGATE (low-side gate), SW/PHASE node sense, PGND/AGND, FB (feedback), COMP (compensation), SS/TRK (soft‑start/tracking), EN/UVLO, and possible PGOOD/OVP (see datasheet for exact pinout and mapping)

Thermal characteristics Thermal performance depends on PCB layout; θJA/θJC provided in datasheet; use solid ground planes and ample copper at PGND/SW for heat spreading

Electrical properties Wide operating input/bias range per datasheet; low reference (~0.8 V class); MHz‑class switching capability; gate-driver outputs for external MOSFETs; protections for UVLO/OC/OV (consult datasheet for limits and test conditions)

Shipment format Tape-and-reel for automated assembly (MX/NOPB), moisture sensitivity per JEDEC; see reel and MSL details in datasheet/packing spec

Lifecycle

Current status Believed Active and widely used in automotive and industrial designs

Not nearing discontinuation to the best of our knowledge at this time

Potential equivalents/alternatives within TI portfolio (selection depends on required VIN/VOUT, frequency, features, and pinout; verify before substitution):

- LM2742-Q1 Similar family synchronous buck PWM controller (check frequency and pinout)

- LM25116-Q1 Wide-input synchronous buck controller for automotive

- TPS40140-Q1 Voltage-mode synchronous buck controller (multi-phase capable; different feature set)

- TPS40060-Q1 Synchronous buck controller (verify specs and automotive grade)

- TPS40170-Q1 High-voltage synchronous buck controller (verify grade and requirements)

If you need drop-in or functionally closer replacements, contact our sales team via the Y-IC website for tailored recommendations and latest lifecycle updates.

Key Application Areas

Automotive ECU power (engine, transmission, body control modules)

Infotainment, cluster, and telematics power rails

ADAS and gateway processors’ core and memory rails

Industrial and factory automation point‑of‑load conversion

Communications and networking baseband/FPGA/ASIC supplies

General-purpose high-efficiency step‑down converters

Datasheet

Y-IC hosts the most authoritative, up-to-date datasheet for LM2743Q1MX/NOPB on our product page. We recommend downloading it here to get exact electrical limits, pinout, thermal data, layout guidance, and application examples.

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