component
LMR51410YDBVR
Public Made by Adomby adom
Texas Instruments Others, SOT-23-6. Pinout cross-checked by two models against the datasheet, 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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Contents
README
markdownLMR51410YDBVR
Texas Instruments · Others · SOT-23-6
LMR51410YDBVR from Texas Instruments, in a SOT-23-6. 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 | 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 connected to the source of the low-side FET internally; connect to system ground and the ground side of CIN and COUT, with the path to CIN as short as possible. |
| 3 | FB | input | Feedback input to the converter; connect a resistor divider to set the output voltage and never short this terminal to ground during operation. |
| 4 | EN | input | Precision enable input (High = on, Low = off) that must not be floated, can be tied to VIN, and allows an adjustable UVLO via an external resistor divider. |
| 5 | VIN | power_in | Supply input to the internal bias LDO and high-side FET (4V to 42V recommended); connect to the input supply with input bypass capacitors CIN directly at this pin and GND. |
| 6 | SW | power_out | 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. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Others |
| Pins | 6 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| VIN quiescent current (non-switching) | IQ(VIN) | 26.5 | 40 | µA | VEN = 3V, PFM Variant Only | 5 | |
| VIN shutdown supply current | ISD(VIN) | 0.8 | 3 | µA | VEN = 0V | 5 | |
| VIN UVLO rising threshold | VIN_UVLO(R) | 3.82 | 4 | V | VIN rising | 5 | |
| VIN UVLO falling threshold | VIN_UVLO(F) | 3.4 | 3.56 | V | VIN falling | 5 | |
| VIN UVLO hysteresis | VIN_UVLO(H) | 0.25 | V | 5 | |||
| EN voltage rising threshold | VEN(R) | 1.1 | 1.227 | 1.36 | V | EN rising, enable switching | 5 |
| EN voltage falling threshold | VEN(F) | 0.85 | 1 | 1.15 | V | EN falling, disable switching | 5 |
| EN pin sourcing current post EN rising threshold | IEN(P2) | 10 | 50 | nA | VEN = 3V | 5 | |
| Reference voltage | VFB | 0.788 | 0.8 | 0.812 | V | 5 | |
| FB input leakage current | IFB(LKG) | 0.2 | nA | VFB = 0.8V | 5 | ||
| Switching frequency, CCM operation, Y version | fSW(CCM) | 0.935 | 1.1 | 1.265 | MHz | "Y" Version | 5 |
| Internal fixed soft-start time | tSS | 2.3 | ms | 5 | |||
| High-side MOSFET on-resistance | RDSON(HS) | 0.7 | Ω | VIN = 12V, TJ = 25°C | 5 | ||
| Low-side MOSFET on-resistance | RDSON(LS) | 0.36 | Ω | VIN = 12V, TJ = 25°C | 5 | ||
| Minimum ON pulse width | tON_MIN | 80 | ns | VIN = 12V, IOUT = 0.1A | 5 | ||
| Maximum ON pulse width | tON_MAX | 5 | µs | VIN = 12V, IOUT = 0.5A | 5 | ||
| Minimum OFF pulse width | tOFF_MIN | 200 | ns | VIN = 5V | 6 | ||
| High-side peak current limit | IHS_PK(OC) | 1.25 | 1.6 | 1.95 | A | LMR51410 | 6 |
| Low-side valley current limit | ILS_V(OC) | 0.9 | 1.1 | 1.3 | A | LMR51410 | 6 |
| Zero-cross detection current threshold | IZC | 0 | A | 6 | |||
| Thermal shutdown threshold | TJ(SD) | 165 | °C | Junction temperature rising | 6 | ||
| Thermal shutdown hysteresis | TJ(HYS) | 20 | °C | 6 | |||
| Operating input voltage range | VIN | 4 | 42 | V | System characteristics | 6 | |
| Adjustable output voltage regulation | VOUT | -1.5 | 2.5 | % | PFM operation | 6 | |
| Input supply current when in regulation | ISUPPLY | 38 | µA | VIN = 24V, VOUT = 5V, IOUT = 0A, RFBB = 22.1kΩ, PFM variant | 6 | ||
| Maximum switch duty cycle | DMAX | 98 | % | 6 | |||
| FB pin voltage required to trip short-circuit hiccup mode | VHC | 0.32 | V | 6 | |||
| Time between current-limit hiccup burst | THICCUP | 150 | ms | 6 | |||
| Input voltage VIN to GND | VIN | -0.3 | 45 | V | 4 | ||
| Input voltage EN to GND | EN | -0.3 | V | max = VIN + 0.3 V | 4 | ||
| Input voltage FB to GND | FB | -0.3 | 5.5 | V | 4 | ||
| Output voltage SW to GND | SW | -0.3 | 45 | V | 4 | ||
| Output voltage SW to GND less than 10ns transients | SW | -5 | 50 | V | less than 10ns transients | 4 | |
| Output voltage CBOOT to SW | CBOOT | -0.3 | 5.5 | V | 4 | ||
| Junction temperature | TJ | -40 | 150 | °C | 4 | ||
| Storage temperature | Tstg | -55 | 150 | °C | 4 | ||
| ESD HBM | V(ESD) | -2500 | 2500 | V | Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 | 4 | |
| ESD CDM | V(ESD) | -750 | 750 | V | Charged-device model (CDM), per ANSI/ESDA/JEDEC JS-002 | 4 | |
| Input voltage VIN to GND | VIN | 4 | 42 | V | 4 | ||
| Input voltage EN | EN | 0 | V | max = VIN | 4 | ||
| Input voltage FB | FB | 0 | 4.5 | V | 4 | ||
| Output voltage VOUT | VOUT | 0.8 | 28 | V | 4 | ||
| Output current Iout(LMR51410) | Iout | 1 | A | 4 | |||
| Operating junction temperature | TJ | -40 | 150 | °C | 4 | ||
| Junction-to-ambient thermal resistance | RθJA | 147.8 | °C/W | DBV (SOT-23-6), 6 pins | 5 | ||
| Junction-to-ambient thermal resistance with EVM | RθJA(Effective) | 95 | °C/W | DBV (SOT-23-6), 6 pins | 5 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 71.1 | °C/W | DBV (SOT-23-6), 6 pins | 5 | ||
| Junction-to-board thermal resistance | RθJB | 36.6 | °C/W | DBV (SOT-23-6), 6 pins | 5 | ||
| Junction-to-top characterization parameter | ψJT | 14.2 | °C/W | DBV (SOT-23-6), 6 pins | 5 | ||
| Junction-to-board characterization parameter | ψJB | 36.4 | °C/W | DBV (SOT-23-6), 6 pins | 5 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | copper | The SW pin connecting to the inductor must be as short as possible, and just wide enough to carry the load current without excessive heating. Short, thick traces or copper pours (shapes) must be used | 21 |
CAD (KiCad official)
- Symbol:
LMR51410YDBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lmr51410ydbvr-etched.step/lmr51410ydbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmr51410ydbvr.step/lmr51410ydbvr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (33 pp, sha256
a61ac445a7c8c97e, retrieved 2026-10-26, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).