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LM2743MTCX

Public Made by Adom

by adom

Texas Instruments DC-DC Converters, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LM2743MTCX

Texas Instruments · DC-DC Converters · TSSOP-14

LM2743MTCX from Texas Instruments, in a TSSOP-14. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 BOOT power_in Bootstrap pin and supply rail for the gate drivers; when the high-side MOSFET turns on, this pin should be at least one gate threshold above the regulator input voltage VIN.
2 LG output Low-gate drive for the low-side N-channel MOSFET, interlocked with HG (pin 14) to avoid shoot-through.
3 PGND power_in Power ground and ground for the low-side MOSFET driver; must be connected together with pin 13 on the PCB to form a ground plane.
4 SGND power_in Signal ground that should be connected appropriately to the ground plane following good switching regulator layout practices.
5 VCC power_in Supply rail for the control sections of the IC; the recommended supply voltage range is 3 V to 6 V.
6 PWGD output Open-drain power-good output, typically pulled up to VCC or a low-voltage source with a resistor that keeps the current into the pin below 1 mA (100 kΩ recommended); it is pulled low on output under-voltage or over-voltage faults and under input UVLO.
7 ISEN passive Current-limit threshold setting pin that sources a fixed 40 µA; a resistor connected from this pin to the drain of the low-side MOSFET (switch node) sets the limit.
8 EAO output Error amplifier output, compared with an internally generated ramp to set the duty cycle; required for control-loop compensation.
9 SS/TRACK passive Soft-start and tracking pin connected to the error amplifier non-inverting input during soft-start and whenever its voltage is below the internal reference; a minimum 1 nF capacitor to ground gives basic soft-start.
10 FB input Feedback pin, the inverting input of the error amplifier used to sense the output voltage and compensate the loop.
11 FREQ passive Frequency adjust pin; a resistor from this pin to ground sets the switching frequency (for example 324 kΩ for 100 kHz and 24.9 kΩ for 1 MHz).
12 SD input IC shutdown pin: pull to VCC to enable the IC and connect to ground to disable it, with both high-side and low-side drives off during shutdown.
13 PGND power_in Power ground that must be connected together with pin 3 on the PCB to form a ground plane.
14 HG output High-gate drive for the high-side N-channel MOSFET, interlocked with LG (pin 2) to avoid shoot-through.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-14
Category Power Management (PMIC)
Pins 14

CAD (KiCad official)

  • Symbol: LM2743MTCX
  • Footprint: Package_SO:TSSOP-14_4.4x5mm_P0.65mm
  • 3D model: TSSOP-14 (KiCad packages3D, STEP)
  • 3D model files: lm2743mtcx-etched.step / lm2743mtcx-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm2743mtcx.step / lm2743mtcx.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (44 pp, sha256 d1cfdbe28e1c6331, retrieved 2026-10-10, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF