# TPS23525PWR

**Texas Instruments** · Supervisor And Reset ICs · TSSOP-16

TPS23525PWR from Texas Instruments, in a TSSOP-16. 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 | Neg48A | input | Input to the OR-ing controller for the -48A feed; the TPS23525 regulates the drop from VEE to Neg48A to 25 mV to mimic an ideal diode. |
| 2 | NC | unconnected | No connect to space high-voltage pins. |
| 3 | GATEB | output | Gate driver for the OR-ing FET of the -48V_B feed. |
| 4 | GATEA | output | Gate driver for the OR-ing FET of the -48V_A feed. |
| 5 | VEE | power_in | IC ground; Kelvin sense to the bottom of RSNS to ensure accurate current limit. |
| 6 | SNS | input | Sense pin used to measure and regulate current; Kelvin sense to RSNS to ensure accurate current limits. |
| 7 | GATE | output | Gate drive for the main hot swap FET. |
| 8 | SS | output | Soft-start pin; connect a capacitor CSS between SS and -48V_OUT, as the dv/dt on -48V_OUT is proportional to the gate sourcing current divided by CSS. |
| 9 | D | input | Senses the drain of the hot swap FET and programs the threshold where the hot swap switches between CL1 and CL2; connect a resistor from this pin to the hot swap FET drain (-48V_OUT). Recommended RD is 120 kΩ to 2,000 kΩ. |
| 10 | TMR | output | Timer pin that programs the duration the hot swap FET can be in current limit; program it with a capacitor between TMR and VEE. |
| 11 | OV | input | Input overvoltage comparator; a resistor divider programs the threshold at which the device turns off on an overvoltage event. |
| 12 | UVEN | input | Input undervoltage comparator; a resistor divider programs the threshold at which the device turns on. |
| 13 | VCC | power_out | Clamped supply; tie to RTN through a resistor (VCC absolute maximum 20 V with current into VCC below 10 mA). |
| 14 | PGb | output | Power Good Bar, an open-drain output that goes low when the hot swap is fully on and the DC/DC can draw full power. |
| 15 | NC | unconnected | No connect to space high-voltage pins. |
| 16 | Neg48B | input | Input to the OR-ing controller for the -48B feed; the TPS23525 regulates the drop from VEE to Neg48B to 25 mV to mimic an ideal diode. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-16 |
| Category | Power Management (PMIC) |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `TPS23525PWR`
- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`
- 3D model: TSSOP-16 (KiCad packages3D, STEP)
- 3D model files: `tps23525pwr-etched.step` / `tps23525pwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps23525pwr.step` / `tps23525pwr.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/tps23525.pdf) (40 pp, sha256 `0a77c6cd3684d412`, retrieved 2026-10-08, 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/tps23525pwr-datasheet.pdf)