component
REF2033QDDCRQ1
Public Made by Adomby adom
Texas Instruments Voltage References, SOT-23-5. 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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README
markdownREF2033QDDCRQ1
Texas Instruments · Voltage References · SOT-23-5
REF2033QDDCRQ1 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 | VBIAS | output | Bias voltage output equal to VREF / 2 (1.65 V for REF2033-Q1). |
| 2 | GND | power_in | Ground. |
| 3 | EN | input | Enable input; device is enabled when EN ≥ VIN - 0.7 V, with absolute maximum of VIN + 0.3 V. |
| 4 | VIN | power_in | Input supply voltage, VREF + 0.02 V to 5.5 V recommended (absolute maximum 6 V). |
| 5 | VREF | power_in | Reference voltage output (VREF, 3.3 V for REF2033-Q1), able to source and sink up to ±20 mA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Power Supply Chip |
| 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, IL = 0 mA, VIN = 5 V | 6 | ||
| Output voltage temperature coefficient | -8 | 3 | 8 | ppm/°C | -40°C ≤ TA ≤ 125°C | 6 | |
| VREF and VBIAS tracking over temperature | -7 | 2 | 7 | ppm/°C | -40°C ≤ TA ≤ 125°C | 6 | |
| Line regulation | ΔVO(ΔVI) | 3 | 35 | ppm/V | VREF + 0.02 V ≤ VIN ≤ 5.5 V | 6 | |
| Load regulation, sourcing | ΔVO(ΔIL) | 8 | 20 | ppm/mA | Sourcing 0 mA ≤ IL ≤ 20 mA, VREF + 0.6 V ≤ VIN ≤ 5.5 V | 6 | |
| Load regulation, sinking | ΔVO(ΔIL) | 8 | 20 | ppm/mA | Sinking 0 mA ≤ IL ≤ -20 mA, VREF + 0.02 V ≤ VIN ≤ 5.5 V | 6 | |
| Supply current, active mode | ICC | 360 | 430 | µA | Active mode | 6 | |
| Supply current, active mode, over temperature | ICC | 460 | µA | Active mode, -40°C ≤ TA ≤ 125°C | 6 | ||
| Supply current, shutdown mode | ICC | 3.3 | 5 | µA | Shutdown mode | 6 | |
| Supply current, shutdown mode, over temperature | ICC | 9 | µA | Shutdown mode, -40°C ≤ TA ≤ 125°C | 6 | ||
| Enable voltage, shutdown | 0 | 0.7 | V | Device in shutdown mode (EN = 0) | 6 | ||
| Dropout voltage | 10 | 20 | mV | 6 | |||
| Dropout voltage at 20 mA | 600 | mV | IL = 20 mA | 6 | |||
| Short-circuit current | ISC | 50 | mA | 6 | |||
| Turn-on time | ton | 500 | µs | 0.1% settling, CL = 1 µF | 6 | ||
| Low-frequency noise | 12 | ppmPP | 0.1 Hz ≤ f ≤ 10 Hz | 6 | |||
| Output voltage noise density | 0.25 | ppm/√Hz | f = 100 Hz | 6 | |||
| Stable output capacitor range | CL | 0 | 10 | µF | 6 | ||
| Long-term stability | 25 | ppm | 0 to 1000 hours | 6 | |||
| Output voltage hysteresis, cycle 1 | 60 | ppm | 25°C, -40°C, 125°C, 25°C, Cycle 1 | 6 | |||
| Output voltage hysteresis, cycle 2 | 35 | ppm | 25°C, -40°C, 125°C, 25°C, Cycle 2 | 6 | |||
| Input voltage VIN | VIN | -0.3 | 6 | V | 5 | ||
| Input voltage EN | EN | -0.3 | V | Max is VIN + 0.3 | 5 | ||
| Operating temperature | -55 | 150 | °C | 5 | |||
| Junction temperature | Tj | 150 | °C | 5 | |||
| Storage temperature | Tstg | -65 | 170 | °C | 5 | ||
| Supply input voltage range | VIN | 5.5 | V | IL = 0 mA, TA = 25°C; min is VREF + 0.02 | 5 | ||
| Junction-to-ambient thermal resistance | RθJA | 193.6 | °C/W | DDC (SOT23), 5 pins | 5 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 40.2 | °C/W | DDC (SOT23), 5 pins | 5 | ||
| Junction-to-board thermal resistance | RθJB | 34.5 | °C/W | DDC (SOT23), 5 pins | 5 | ||
| Junction-to-top characterization parameter | ψJT | 0.9 | °C/W | DDC (SOT23), 5 pins | 5 | ||
| Junction-to-board characterization parameter | ψJB | 34.3 | °C/W | DDC (SOT23), 5 pins | 5 |
CAD (KiCad official)
- Symbol:
REF2033QDDCRQ1 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
ref2033qddcrq1-etched.step/ref2033qddcrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ref2033qddcrq1.step/ref2033qddcrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (36 pp, sha256
814f93593dcd51fb, retrieved 2026-10-22, 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).