component
LM2743MTCX
Public Made by Adomby adom
Texas Instruments DC-DC Converters, TSSOP-14. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
Open in new tab ↗
Loads when you scroll to it. Unloads after 5 minutes in the background.
Symbol & Footprint
Schematic Symbol
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
PCB Footprint
Open full view ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
Datasheet
Open in new tab ↗Loads when you scroll to it. Unloads after 5 minutes in the background.
README
markdownLM2743MTCX
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm2743mtcx.step/lm2743mtcx.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).