# TPS77801PWPR

**Texas Instruments** · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · HTSSOP-20

TPS77801PWPR from Texas Instruments, in a HTSSOP-20. 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/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 2 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 3 | GND | power_in | Regulator ground pin. |
| 4 | NC | unconnected | No internal connection. |
| 5 | EN | input | Enable input; applying a TTL high signal shuts down the regulator, and EN should be tied to ground if the shutdown feature is not used. |
| 6 | IN | power_in | Input voltage pin for the regulator (IN pins 6 and 7 are both input). |
| 7 | IN | power_in | Input voltage pin for the regulator (IN pins 6 and 7 are both input). |
| 8 | NC | unconnected | No internal connection. |
| 9 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 10 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 11 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 12 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 13 | OUT | power_out | Regulated output voltage; an output capacitor of at least 10 µF with ESR between 50 mΩ and 1.5 Ω is required from OUT to GND for stability. |
| 14 | OUT | power_out | Regulated output voltage; an output capacitor of at least 10 µF with ESR between 50 mΩ and 1.5 Ω is required from OUT to GND for stability. |
| 15 | FB/NC | input | Feedback input that senses the output voltage to close the loop for the adjustable version (TPS77801); routing should minimize noise pickup, as FB connects to a high-impedance amplifier. |
| 16 | PG | output | Power-good output of the TPS778xx, which is an active-high output usable for a power-on reset or low-battery indicator. |
| 17 | NC | unconnected | No internal connection. |
| 18 | NC | unconnected | No internal connection. |
| 19 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 20 | GND/HSINK | power_in | Ground/heatsink terminal, one of eight GND/HSINK pins (1, 2, 9, 10, 11, 12, 19, 20) that serve as regulator ground and heatsink on the PowerPAD package. |
| 21 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-20 |
| Category | Power Management (PMIC) |
| Pins | 21 |

## 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 | VI | 2.7 |  | 10 | V | Minimum VIN = VOUT + VDO or 2.7 V, whichever is greater | 6 |
| Output voltage range (TPS77801) | VO | 1.2 |  | 5.5 | V | TPS77801 option | 6 |
| Operating junction temperature | TJ | -40 |  | 125 | °C |  | 6 |
| Input voltage range | VI | -0.3 |  | 13.5 | V | Voltages with respect to network ground | 6 |
| Voltage range at EN |  | -0.3 |  | 16.5 | V |  | 6 |
| Maximum PG voltage |  |  |  | 16.5 | V | TPS778xx | 6 |
| Output voltage (OUT, FB) | VO |  |  | 7 | V |  | 6 |
| Operating junction temperature range | TJ | -40 |  | 125 | °C |  | 6 |
| Storage temperature range | Tstg | -65 |  | 150 | °C |  | 6 |
| ESD rating, HBM |  |  |  | 2 | kV | HBM | 6 |
| Output voltage tolerance (TPS77801) | VO | 0.98 |  | 1.02 | VO | 1.2 V ≤ VO ≤ 5.5 V | 7 |
| Output current limit |  | 1.2 | 1.7 | 2 | A | VO = 0 V | 7 |
| Input current (EN) |  | -1 | 0 | 1 | µA | EN = 0 V | 8 |
| Input current (EN) |  | -1 |  | 1 | µA | EN = VI | 8 |
| High level enable input voltage |  | 1.7 |  |  | V |  | 7 |
| Low level enable input voltage |  |  |  | 0.9 | V |  | 7 |
| PG trip threshold voltage |  | 92 |  | 98 | %VO | VO decreasing (TPS778xx) | 8 |
| PG output low voltage |  |  | 0.15 | 0.4 | V | VI = 2.7 V, IO(PG) = 1 mA | 8 |
| Power rating, PWP, TA < 25°C, 0 CFM |  |  |  | 2.9 | W | PWP§ package, 0 CFM air flow, TA < 25°C | 6 |
| Power rating, PWP, TA < 25°C, 300 CFM |  |  |  | 4.3 | W | PWP§ package, 300 CFM air flow, TA < 25°C | 6 |
| Power rating, PWP, TA < 25°C, 0 CFM |  |  |  | 3 | W | PWP¶ package, 0 CFM air flow, TA < 25°C | 6 |
| Power rating, PWP, TA < 25°C, 300 CFM |  |  |  | 7.2 | W | PWP¶ package, 300 CFM air flow, TA < 25°C | 6 |

## CAD (KiCad official)

- Symbol: `TPS77801PWPR`
- Footprint: `Package_SO:TSSOP-20-1EP_4.4x6.5mm_P0.65mm_EP2.15x3.35mm`
- 3D model: HTSSOP-20, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.2 mm nominal TSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `tps77801pwpr-etched.step` / `tps77801pwpr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps77801pwpr.step` / `tps77801pwpr.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/cn/lit/gpn/tps777) (28 pp, sha256 `011757d41db41f42`, retrieved 2026-10-09, tier: lcsc)
- **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/tps77801pwpr-datasheet.pdf)