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REF3440SQDBVRQ1

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Texas Instruments Voltage Reference, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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package.json Publish 0.1.0 · Ray 19d ago
page.json ref3440sqdbvrq1: specified limits as data (metadata.characteristics, 34 rows from the datasheet) · Ray 16d ago
README.md ref3440sqdbvrq1: specified limits as data (metadata.characteristics, 34 rows from the datasheet) · Ray 16d ago
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ref3440sqdbvrq1-etched.step ref3440sqdbvrq1: factory component page (tier=lcsc) · Ray 19d ago
ref3440sqdbvrq1-hero.glb ref3440sqdbvrq1: hero GLB from the etched model (keeps the MPN mark) · Ray 19d ago
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ref3440sqdbvrq1.step Publish 0.1.0 · Ray 19d ago

REF3440SQDBVRQ1

Texas Instruments · Voltage Reference · SOT-23-5

REF3440SQDBVRQ1 from Texas Instruments, in a SOT-23-5. 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 NC unconnected Test pin per the datasheet, specified to be connected from 0 V to 18 V, so it is not a true no-connect.
2 GND power_in Ground connection for the reference.
3 IN power_in Input supply voltage connection; absolute maximum is -0.3 V to 13 V, and VIN must be VOUT + VDO up to 12 V.
4 OUT output Reference voltage output connection, with output current limited to ±10 mA and short-circuit current limited to 18 mA.
5 NIC unconnected No internal connection.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category Power Management (PMIC)
Pins 5

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Output voltage accuracy -0.05 0.05 % TA = 25°C 6
Line regulation ΔVO/ΔVIN 2 15 ppm/V VIN = VOUT + VDO (footnote 2, VDO = 50mV) to 12V 6
Load regulation, sourcing ΔVO/ΔIL 20 30 ppm/mA IL = 0mA to 10mA, VIN = VOUT + VDO (footnote 3, VDO = 500mV) 6
Load regulation, sinking ΔVO/ΔIL 60 98 ppm/mA IL = 0mA to -10mA, VIN = VOUT + VDO (footnote 3, VDO = 500mV) 6
Capacitive load stable range CL 0.1 10 µF 6
Input voltage VIN 12 V Minimum is VOUT + VDO (expression, not a numeric limit) 7
Output current capability IL -10 10 mA VIN = VOUT + VDO to 12V 7
Dropout voltage (row 1, value 50 mV) VDO 50 mV IL = 0mA 7
Dropout voltage (max at IL = 0mA) VDO 100 mV IL = 0mA 7
Dropout voltage (max at IL = 10mA) VDO 500 mV IL = 10mA 7
Quiescent current, operating mode IQ 72 95 µA Operating mode 7
Short-circuit current ISC 18 22 mA TA = 25°C, VOUT = 0V 7
Recommended input voltage IN 12 V Minimum is VOUT + VDO (expression, not a numeric limit) 5
Recommended output current IL -10 10 mA 5
Recommended operating ambient temperature TA -40 25 125 °C 5
Absolute maximum input voltage IN -0.3 13 V 5
Absolute maximum output voltage VOUT -0.3 5.5 V 5
Output short-circuit current 20 mA 5
Absolute maximum operating temperature range TA -55 150 °C Free-air, natural convection 5
Storage temperature range Tstg -65 170 °C 5
Output voltage VOUT 4.096 V REF3440Q1 variant 7
Output voltage temperature coefficient 2.5 6 ppm/°C Box method (see temperature drift section) 6
Integrated wideband noise en 24 µVrms 10Hz ≤ f ≤ 10kHz 6
Low-frequency noise, peak-to-peak enp-p 3.8 µVp-p/V 0.1Hz ≤ f ≤ 10Hz (REF3440-Q1) 6
Output voltage noise density en 0.2 ppm/√Hz f = 1kHz (REF3440-Q1) 6
Long-term stability, 0h to 1000h (DBV package) 25 ppm 35°C, 0h to 1000h 6
Long-term stability, 1000h to 2000h (DBV package) 10 ppm 35°C, 1000h to 2000h 6
Output voltage thermal hysteresis, cycle 1 (DBV package) 30 ppm 25°C, -40°C, 125°C, 25°C cycle 1 6
Output voltage thermal hysteresis, cycle 2 (DBV package) 10 ppm 25°C, -40°C, 125°C, 25°C cycle 2 6
Thermal resistance, junction-to-ambient (DBV 5-pin) RθJA 122.6 °C/W 5
Thermal resistance, junction-to-case (top) (DBV 5-pin) RθJC(top) 80.2 °C/W 5
Thermal resistance, junction-to-board (DBV 5-pin) RθJB 42 °C/W 5
Junction-to-top characterization parameter (DBV 5-pin) ΨJT 23.2 °C/W 5
Junction-to-board characterization parameter (DBV 5-pin) ΨJB 41.9 °C/W 5

CAD (KiCad official)

  • Symbol: REF3440SQDBVRQ1
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ref3440sqdbvrq1-etched.step / ref3440sqdbvrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ref3440sqdbvrq1.step / ref3440sqdbvrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (40 pp, sha256 addb0b3508cd0c2e, retrieved 2026-10-12, 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