# TPS77633DR

**Texas Instruments** · Linear Voltage Regulators (LDO) · SOIC-8

TPS77633DR from Texas Instruments, in a SOIC-8. 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 | GND | power_in | Ground reference pin for the regulator. |
| 2 | EN | input | Negative-polarity enable input; applying a TTL high signal to EN shuts the regulator down, reducing quiescent current to 1µA at TJ = +25°C, and EN should be tied to ground if the shutdown feature is not used. Absolute maximum voltage at EN is −0.3 V to +16.5 V. |
| 3 | IN | power_in | Input voltage pin; absolute maximum input voltage range is −0.3 V to +13.5 V. |
| 4 | IN | power_in | Input voltage pin (second IN pin, connected in parallel with pin 3); absolute maximum input voltage range is −0.3 V to +13.5 V. |
| 5 | OUT | power_out | Regulated output voltage; an output capacitor of at least 10µF with ESR between 50mΩ and 1.5Ω is required between OUT and GND for stability. |
| 6 | OUT | power_out | Regulated output voltage (second OUT pin, connected in parallel with pin 5); an output capacitor of at least 10µF with ESR between 50mΩ and 1.5Ω is required between OUT and GND for stability. |
| 7 | FB/NC | passive | Feedback voltage input for the adjustable version only; on the fixed-voltage version this pin is not internally connected (NC). |
| 8 | RESET/PG | output | Open-drain power-good (PG) output of the TPS776xx family, which the TPS77633 belongs to; it requires an external pullup resistor, may be left floating if unused, and has a maximum voltage of 16.5 V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Power Management ICs |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input voltage range | VIN | 2.7 |  | 10 | V |  | 3 |
| Output voltage accuracy | VOUT | -2 |  | 2 | % | 10µA < IOUT < 500mA | 3 |
| Dropout voltage (TPS77633) | VDO |  | 169 | 287 | mV | IOUT = 500mA | 3 |
| Output current limit | ICL | 1.2 | 1.6 | 1.9 | A | VOUT = 0V | 3 |
| Operating junction temperature range | TJ | -40 |  | 125 | °C |  | 3 |
| High-level enable input voltage | VEN(HI) | 1.7 |  |  | V |  | 3 |
| Low-level enable input voltage | VEN(LO) |  |  | 0.9 | V |  | 3 |
| Input current (EN) |  | -1 | 0 | 1 | µA | EN = 0V | 3 |
| Input current (EN) |  | -1 |  | 1 | µA | EN = VIN | 3 |
| Standby current | ISTBY |  | 1 |  | µA | EN = VIN, at TJ = +25°C, 2.7V < VIN < 10V | 3 |
| Standby current | ISTBY |  |  | 10 | µA | EN = VIN, 2.7V < VIN < 10V | 3 |
| Minimum input voltage for valid PG |  |  |  | 1.1 | V | IOUT(PG) = 300µA | 3 |
| PG trip threshold voltage |  | 92 |  | 98 | %VOUT | VOUT decreasing | 3 |
| PG output low voltage |  |  | 0.15 | 0.4 | V | VIN = 2.7V, IOUT(PG) = 1mA | 3 |
| PG leakage current |  |  |  | 1 | µA | V(PG) = 5V | 3 |
| Input voltage range VIN | VIN | -0.3 |  | 13.5 | V | Over operating temperature range (unless otherwise noted); with respect to network ground | 2 |
| Voltage range at EN |  | -0.3 |  | 16.5 | V |  | 2 |
| Maximum PG voltage (TPS776xx) |  |  |  | 16.5 | V |  | 2 |
| Voltage range at OUT, FB |  |  |  | 7 | V |  | 2 |
| Storage junction temperature range | TSTG | -65 |  | 150 | °C |  | 2 |
| ESD rating, HBM |  |  |  | 2 | kV | HBM | 2 |
| Power dissipation, D package, 0 CFM |  |  |  | 568 | mW | TA < +25°C, board D, airflow 0 CFM | 2 |
| Power dissipation, D package, 0 CFM |  |  |  | 312 | mW | TA = +70°C, board D, airflow 0 CFM | 2 |
| Power dissipation, D package, 0 CFM |  |  |  | 227 | mW | TA = +85°C, board D, airflow 0 CFM | 2 |
| Power dissipation, D package, 250 CFM |  |  |  | 904 | mW | TA < +25°C, board D, airflow 250 CFM | 2 |
| Power dissipation, D package, 250 CFM |  |  |  | 497 | mW | TA = +70°C, board D, airflow 250 CFM | 2 |
| Power dissipation, D package, 250 CFM |  |  |  | 362 | mW | TA = +85°C, board D, airflow 250 CFM | 2 |
| Derating factor above TA = +25°C, D package, 0 CFM |  |  | 5.68 |  | mW/°C | board D, airflow 0 CFM | 2 |
| Derating factor above TA = +25°C, D package, 250 CFM |  |  | 9.04 |  | mW/°C | board D, airflow 250 CFM | 2 |

## CAD (KiCad official)

- Symbol: `TPS77633DR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `tps77633dr-etched.step` / `tps77633dr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps77633dr.step` / `tps77633dr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/tps77633.pdf) (31 pp, sha256 `7764c2df7df2d85f`, retrieved 2026-10-30, tier: manufacturer)
- **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](docs/tps77633dr-datasheet.pdf)