component

LMR54406DBVR

Public Unreviewed

by Ray

Texas Instruments DC-DC Converters, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentpower management (pmic)lmr54406dbvr
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity

3D Model

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Symbol & Footprint

Schematic Symbol

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

PCB Footprint

Open full view ↗
Loads on click. Unloads when scrolled away or the tab is hidden.

Datasheet

Open in new tab ↗
Loads on click. Unloads when scrolled away or the tab is hidden.
Download PDF
Contents

README

markdown

LMR54406DBVR

Texas Instruments · DC-DC Converters · SOT-23-6

LMR54406DBVR from Texas Instruments, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 CB passive Bootstrap capacitor connection for the high-side FET driver. Connect a high quality 100nF capacitor from this pin to the SW pin.
2 GND power_in Power ground pin. Connected to the source of the low-side FET internally. Connect to system ground, ground side of CIN and COUT. The path to CIN must be as short as possible.
3 FB input Feedback input to the converter. Connect a resistor divider to set the output voltage (VFB = 0.8V typical, 0.79-0.81V). Never short this terminal to ground during operation. Absolute max -0.3V to 5.5V.
4 EN input Precision enable input to the converter. Do not float. High = on, low = off. Can be tied to VIN. Precision enable allows adjustable UVLO via external resistor divider (VEN rising ~1.23V, falling ~1.1V, 130mV hysteresis).
5 VIN power_in Supply input pin to the internal bias LDO and high-side FET. Operating range 4V to 36V (absolute max 45V DC, 50V transient). Connect to the input supply and input bypass capacitors CIN. Input bypass capacitors must be directly connected to this pin and GND.
6 SW output Switching output of the converter. Internally connected to the source of the high-side FET and drain of the low-side FET. Connect to the power inductor. High-side RDS(on) ~450 mΩ, low-side RDS(on) ~240 mΩ.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-6
Category Power Management (PMIC)
Pins 6

Ordering variants

Same part, different packaging or reel option.

  • LMR54406DBVR
  • LMR54406DBVRFDBVR

CAD (KiCad official)

  • Symbol: LMR54406DBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Texas Instruments datasheet (37 pp, sha256 f0dc0ace8430cad9, retrieved 2026-08-17, tier: manufacturer)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF