component
LMR51420XDDCR
Public Made by Adomby adom
Texas Instruments DC-DC Converters, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLMR51420XDDCR
Texas Instruments · DC-DC Converters · SOT-23-6
LMR51420XDDCR 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 | GND | power_in | Power ground terminal connected to the low-side FET source; must be connected to system ground with the shortest possible path to the input bypass capacitor. |
| 2 | SW | power_out | Switching output node connected to the high-side FET source and low-side FET drain; connect this pin to the power inductor. |
| 3 | VIN | power_in | Supply input terminal for internal bias LDO and high-side FET; connect directly to input supply with input bypass capacitors. |
| 4 | FB | input | Feedback input for voltage regulation through external resistor divider; never short to ground during operation. |
| 5 | EN | input | Precision enable input for ON/OFF control with HIGH = on and LOW = off; cannot be left floating and allows adjustable UVLO through external resistor divider. |
| 6 | CB | power_out | Bootstrap capacitor connection for high-side FET gate driver; connect a 100-nF high-quality ceramic capacitor from this pin to the SW pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Power Management (PMIC) |
| Pins | 6 |
CAD (KiCad official)
- Symbol:
LMR51420XDDCR - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lmr51420xddcr-etched.step/lmr51420xddcr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmr51420xddcr.step/lmr51420xddcr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (33 pp, sha256
0ad3d2ef438f42ca, retrieved 2026-09-23, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).