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LMR51606YDBVR

Public Made by Adom

by adom

TEXAS INSTRUMENTS Global Sourcing Parts, SOT-23-6. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LMR51606YDBVR

TEXAS INSTRUMENTS · Global Sourcing Parts · SOT-23-6

LMR51606YDBVR 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; a 100nF quality capacitor is connected between this pin and SW.
2 GND power_in Power ground pin, internally connected to the low-side FET source; connect to system ground and to the ground side of CIN and COUT, keeping the connection to CIN short.
3 FB input Converter feedback input; a resistor divider connected here sets the output voltage, and this pin must not be shorted to ground during operation.
4 EN input Precision enable input that must not be left open or floating; high turns the converter on and low turns it off, it may be tied to VIN, and an external divider allows an adjustable UVLO.
5 VIN power_in Input supply pin for the internal bias LDO and high-side FET, operating over 4 V to 65 V; the input bypass capacitor CIN must be connected directly between this pin and GND.
6 SW output Converter switching output, internally connected to the high-side FET source and low-side FET drain; connects 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 to GND VIN -0.3 70 V 4
EN to GND EN -0.3 V max printed as VIN + 0.3 V 4
FB to GND FB -0.3 5.5 V 4
SW to GND SW -0.3 70 V 4
SW to GND transient SW -5 70 V transient less than 10 ns 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 input voltage VIN 4 65 V VIN to GND 4
EN input voltage EN 0 V max printed as VIN 4
FB voltage FB 0 4.5 V 4
Output voltage VOUT 0.8 28 V 4
Operating junction temperature TJ -40 150 °C 4
Quiescent current, non-switching, PFM IQ(VIN) 26.5 40 µA VEN = 3 V, PFM model only 5
Shutdown supply current ISD(VIN) 0.8 3 µA VEN = 0 V 5
EN rising threshold (enable switching) VEN(R) 1.1 1.227 1.36 V EN rising, enables switching 5
EN falling threshold (disable switching) VEN(F) 0.85 1 1.15 V EN falling, disables switching 5
Reference voltage Vfb 0.788 0.8 0.812 V 5
Switching frequency, CCM, 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
VOUT adjustment regulation accuracy VOUT -1.5 2.5 % PFM operation, VIN = 24 V, IOUT = 0 A to full load, deviation from nominal VOUT 6
Maximum duty cycle DMAX 98 % 6
Thermal resistance, junction-to-ambient RθJA 147.8 °C/W JESD 51-7, 4-layer JEDEC board 5
Thermal resistance, junction-to-ambient (effective, EVM) RθJA(Effective) 95 °C/W EVM 5
Thermal resistance, junction-to-case (top) RθJC(top) 71.1 °C/W 5
Thermal resistance, junction-to-board 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

CAD (KiCad official)

  • Symbol: LMR51606YDBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: lmr51606ydbvr-etched.step / lmr51606ydbvr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lmr51606ydbvr.step / lmr51606ydbvr.glb are the bare package body.

Provenance

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

  • Datasheet: TEXAS INSTRUMENTS datasheet (33 pp, sha256 5c1fcf38e7a0045e, retrieved 2026-10-17, 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, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF