component
LMR51606YFDBVR
Public Made by Adomby adom
TEXAS INSTRUMENTS Global Sourcing Parts, 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
markdownLMR51606YFDBVR
TEXAS INSTRUMENTS · Global Sourcing Parts · SOT-23-6
LMR51606YFDBVR 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 | power_out | Bootstrap capacitor connection for the high-side FET driver; connect a high-quality 100-nF capacitor from this pin to the SW pin. |
| 2 | GND | power_in | Power ground pins connected internally to the low-side FET source; connect to system ground and the ground side of CIN and COUT, keeping 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 that must not float (high = on, low = off), can be tied to VIN, and allows an adjustable UVLO set by an external resistor divider. |
| 5 | VIN | power_in | Supply input to the internal bias LDO and high-side FET, connected to the input supply with input bypass capacitors CIN placed directly between this pin and GND. |
| 6 | SW | power_out | Switching output of the converter, internally connected to the high-side FET source and low-side FET drain, and connected to the power inductor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | TEXAS INSTRUMENTS |
| Package | SOT-23-6 |
| Category | Global Sourcing Parts |
| 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, FPWM operation | IQ(VIN) | 420 | µA | VEN = 3 V, FPWM Operation | 5 | ||
| VIN shutdown supply current | ISD(VIN) | 0.8 | 3 | µA | VEN = 0 V | 5 | |
| VIN UVLO rising threshold | VINUVLO(R) | 3.82 | 4 | V | VIN rising | 5 | |
| VIN UVLO falling threshold | VINUVLO(F) | 3.4 | 3.56 | V | VIN falling | 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 = 3 V | 5 | |
| Reference voltage | Vfb | 0.788 | 0.8 | 0.812 | V | 5 | |
| Switching frequency, CCM operation Y version | fSW(CCM) | 0.935 | 1.1 | 1.265 | Mhz | CCM operation "Y" Version | 5 |
| High-side peak current limit LMR51606 | IHS_PK(OC) | 0.8 | 1.1 | 1.4 | A | LMR51606 | 6 |
| Low-side valley current limit LMR51606 | ILS_V(OC) | 0.62 | 0.8 | 0.98 | A | LMR51606 | 6 |
| Adjustable output voltage regulation | VOUT | -1.5 | 2.5 | % | PFM operation | 6 | |
| Maximum switch duty cycle | DMAX | 98 | % | 6 | |||
| VIN to GND | VIN | -0.3 | 70 | V | 4 | ||
| FB to GND | FB | -0.3 | 5.5 | V | 4 | ||
| SW to GND | SW | -0.3 | 70 | V | 4 | ||
| SW to GND less than 10-ns transients | SW | -5 | 70 | V | SW to GND less than 10-ns transients | 4 | |
| CBOOT to SW | CBOOT | -0.3 | 5.5 | V | 4 | ||
| Junction temperature | TJ | -40 | 150 | °C | 4 | ||
| Storage temperature | Tstg | -55 | 150 | °C | 4 | ||
| VIN to GND input voltage | VIN | 4 | 65 | V | 4 | ||
| FB pin voltage | FB | 0 | 4.5 | V | 4 | ||
| Output voltage | VOUT | 0.8 | 28 | V | 4 | ||
| Output current Iout(LMR51606) | Iout | 0.6 | A | LMR51606 | 4 | ||
| Operating junction temperature | TJ | -40 | 150 | °C | 4 | ||
| VIN UVLO hysteresis | VINUVLO(H) | 0.25 | V | 5 | |||
| FB input leakage current | IFB(LKG) | 0.2 | nA | VFB = 0.8 V | 5 | ||
| Internal fixed soft-start time | tSS | 2.3 | ms | 5 | |||
| High-side MOSFET on-resistance | RDSON(HS) | 0.7 | Ω | VIN = 12 V, TJ = 25°C | 5 | ||
| Low-side MOSFET on-resistance | RDSON(LS) | 0.36 | Ω | VIN = 12 V, TJ = 25°C | 5 | ||
| Minimum ON pulse width | tON(min) | 80 | ns | VIN = 12 V, IOUT = 0.1A | 5 | ||
| Maximum ON pulse width | tON(max) | 5 | µs | VIN = 12 V, IOUT = 0.5A | 5 | ||
| Minimum OFF pulse width | tOFF(min) | 200 | ns | VIN = 5 V | 6 | ||
| Low-side negative current limit LMR51606 | ILS(NOC) | -0.36 | A | LMR51606 FPWM Only | 6 | ||
| Zero-cross detection current threshold | IZC | 0 | A | 6 | |||
| Thermal shutdown threshold | TJ(SD) | 165 | °C | Temperature rising | 6 | ||
| Thermal shutdown hysteresis | TJ(HYS) | 20 | °C | 6 | |||
| FB pin voltage to trip short-circuit hiccup mode | VHC | 0.32 | V | 6 | |||
| Switch voltage dead time | tD | 5 | ns | 6 | |||
| Junction-to-ambient thermal resistance | RθJA | 147.8 | °C/W | 5 | |||
| Junction-to-ambient thermal resistance with EVM | RθJA(Effective) | 95 | °C/W | 5 | |||
| Junction-to-case (top) thermal resistance | RθJC(top) | 71.1 | °C/W | 5 | |||
| Junction-to-board thermal resistance | RθJB | 36.6 | °C/W | 5 | |||
| Junction-to-top characterization parameter | ψJT | 14.2 | °C/W | 5 | |||
| Junction-to-board characterization parameter | ψJB | 36.4 | °C/W | 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 | 23 |
CAD (KiCad official)
- Symbol:
LMR51606YFDBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
lmr51606yfdbvr-etched.step/lmr51606yfdbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lmr51606yfdbvr.step/lmr51606yfdbvr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: TEXAS INSTRUMENTS datasheet (35 pp, sha256
3bcfb87d2af56a09, retrieved 2026-10-29, tier: manufacturer) - 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).