# TPS73733DCQR

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-6

TPS73733DCQR from Texas Instruments, in a SOT-223-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN | power_in | Regulator input supply. Accepts 2.2V to 5.5V (absolute max 6.0V). Bypass to GND with a low-ESR ceramic capacitor close to the pin. |
| 2 | OUT | power_out | Regulated 3.3V output, up to 1A. Requires a 1.0µF or larger ceramic output capacitor for stability. Dropout is ~130mV typ at 1A. |
| 3 | GND | power_in | Device ground reference. Tab (pin 6) is also GND and should be tied to this net through the PCB copper for thermal dissipation. |
| 4 | NR/FB | input | On fixed-output versions (TPS73733) this pin is the noise-reduction (NR) node - an optional bypass capacitor to GND lowers output noise. On the adjustable TPS73701 the same pin becomes the feedback (FB) input from an external R1/R2 divider (V_FB internal reference ≈ 1.198-1.210V). |
| 5 | EN | input | Enable input, active high. V_EN(HI) ≥ 1.7V enables the regulator; V_EN(LO) ≤ 0.5V forces shutdown (I_SHDN ≈ 20nA typ). Do not float. Absolute max −0.3V to +6.0V. |
| 6 | GND (TAB) | power_in | SOT-223 metal tab, internally tied to GND. Solder to a copper ground pour for thermal dissipation; must be electrically bonded to GND. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-223-6 |
| Category | PMIC |
| Pins | 6 |

## Ordering variants

Same part, different packaging or reel option.

- `TPS73733DCQR`
- `TPS73733DCQRDRB`
- `TPS73733DCQRDRBT`
- `TPS73733DCQRDRBR`
- `TPS73733DCQRDRV`
- `TPS73733DCQRDRVT`
- `TPS73733DCQRDRVR`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Nominal output voltage accuracy (TJ = +25°C) |  | -1 |  | 1 | % | TJ = +25°C | 4 |
| Overall output accuracy over line, load and temperature |  | -3 |  | 3 | % | Over VIN, IOUT and temperature; VOUT + 0.5V ≤ VIN ≤ 5.5V; 10mA ≤ IOUT ≤ 1A | 4 |
| Input voltage range | VIN | 2.2 |  | 5.5 | V |  | 4 |
| Dropout voltage | VDO |  | 130 | 500 | mV | IOUT = 1A (VIN = VOUT(nom) – 0.1V) | 4 |
| Output current limit | ICL | 1.05 | 1.6 | 2.2 | A | VOUT = 0.9 × VOUT(nom) | 4 |
| EN pin high (enabled) voltage | VEN(HI) | 1.7 |  |  | V |  | 4 |
| EN pin low (shutdown) voltage | VEN(LO) | 0 |  | 0.5 | V |  | 4 |
| Operating junction temperature | TJ | -40 |  | 125 | °C |  | 4 |
| Input voltage range (absolute maximum) |  | -0.3 |  | 6 | V | VIN range | 2 |
| EN voltage range (absolute maximum) |  | -0.3 |  | 6 | V | VEN range | 2 |
| Output voltage range (absolute maximum) |  | -0.3 |  | 5.5 | V | VOUT range | 2 |
| NR/FB voltage range (absolute maximum) | VNR, VFB | -0.3 |  | 6 | V | VNR, VFB range | 2 |
| Junction temperature range (absolute maximum) | TJ | -55 |  | 150 | °C |  | 2 |
| Storage temperature range |  | -65 |  | 150 | °C |  | 2 |
| ESD rating, HBM |  |  |  | 2 | kV | Human body model | 2 |
| ESD rating, CDM |  |  |  | 500 | V | Charged device model | 2 |
| Junction-to-ambient thermal resistance | θJA |  | 53.1 |  | °C/W | DCQ (SOT-223, 6 pins) package | 3 |
| Junction-to-case (top) thermal resistance | θJCtop |  | 35.2 |  | °C/W | DCQ (SOT-223, 6 pins) package | 3 |
| Junction-to-board thermal resistance | θJB |  | 7.8 |  | °C/W | DCQ (SOT-223, 6 pins) package | 3 |
| Junction-to-top characterization parameter | ψJT |  | 2.9 |  | °C/W | DCQ (SOT-223, 6 pins) package | 3 |
| Junction-to-board characterization parameter | ψJB |  | 7.7 |  | °C/W | DCQ (SOT-223, 6 pins) package | 3 |

## CAD (KiCad official)

- Symbol: `TPS73733DCQR`
- Footprint: `Package_TO_SOT_SMD:SOT-223-6`
- 3D model: SOT-223-6 (KiCad packages3D, STEP)
- 3D model files: `tps73733dcqr-etched.step` / `tps73733dcqr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps73733dcqr.step` / `tps73733dcqr.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`tps73733dcqr.step`](tps73733dcqr.step) | 120 KB | You want the bare part, or you mark your own boards. |
| [`tps73733dcqr-etched.step`](tps73733dcqr-etched.step) | 2.2 MB | You want the part with `TPS73733DCQR` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 534 faces against 36 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tps73733dcqr.pdf) (32 pp, sha256 `d13584b386b9f8d9`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/tps73733dcqr-datasheet.pdf)