# TPS62171DSGR

**Texas Instruments** · DC-DC Converters · WSON-8-EP(2x2)

TPS62171DSGR from Texas Instruments, in a WSON-8-EP(2x2). 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 | PGND | power_in | Power ground of the converter. |
| 2 | VIN | power_in | Supply voltage input, specified from 3 V to 17 V in recommended operating conditions. |
| 3 | EN | input | Enable input, High = enabled and Low = disabled. |
| 4 | AGND | power_in | Analog ground, which must be connected to the exposed thermal pad. |
| 5 | FB | input | Voltage feedback of the adjustable version; connect a resistive voltage divider to this pin, and connect it to AGND on fixed-output versions for improved thermal performance. |
| 6 | VOS | input | Output voltage sense pin and connection for the control loop circuitry. |
| 7 | SW | output | Switch node connected to the internal MOSFET switches; the inductor connects between SW and the output capacitor. |
| 8 | PG | output | Open-drain output power good, High = VOUT ready and Low = VOUT below nominal regulation; requires a pull-up resistor and goes high impedance when the device is switched off. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | WSON-8-EP(2x2) |
| Category | Power Management (PMIC) |
| Pins | 9 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Pin voltage range VIN | VIN | -0.3 |  | 20 | V |  | 4 |
| Pin voltage range EN, SW (DC) | EN, SW | -0.3 |  |  | V | DC; max printed as VIN+0.3 | 4 |
| Pin voltage range SW (AC) | SW | -2 |  | 24.5 | V | less than 10ns | 4 |
| Pin voltage range FB, PG, VOS | FB, PG, VOS | -0.3 |  | 7 | V |  | 4 |
| Power good sink current | PG |  |  | 10 | mA |  | 4 |
| Operating junction temperature | TJ | -40 |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| ESD human body model | V(ESD) | -2000 |  | 2000 | V | HBM, per ANSI/ESDA/JEDEC JS-001 | 4 |
| ESD charged device model | V(ESD) | -500 |  | 500 | V | CDM, per JEDEC JESD22-C101 | 4 |
| Supply voltage | VIN | 3 |  | 17 | V |  | 4 |
| Output voltage | VOUT | 0.9 |  | 6 | V |  | 4 |
| Operating junction temperature | TJ | -40 |  | 125 | °C |  | 4 |
| Input voltage range | VIN | 3 |  | 17 | V |  | 5 |
| Operating quiescent current | IQ |  | 17 | 30 | µA | EN = High, IOUT = 0 mA, device not switching | 5 |
| Operating quiescent current | IQ |  | 17 | 25 | µA | TJ = -40°C to +85°C | 5 |
| Shutdown current | ISD |  | 1.5 | 25 | µA | EN = Low | 5 |
| Shutdown current | ISD |  | 1.5 | 4 | µA | TJ = -40°C to +85°C | 5 |
| Undervoltage lockout threshold | VUVLO | 2.6 | 2.7 | 2.82 | V | Falling input voltage | 5 |
| Undervoltage lockout hysteresis | VUVLO |  | 180 |  | mV | Hysteresis | 5 |
| Thermal shutdown temperature | TSD |  | 160 |  | °C | rising temperature | 5 |
| Thermal shutdown hysteresis | TSD |  | 20 |  | °C | falling temperature | 5 |
| Input leakage current (EN) | ILKG_EN |  | 0.01 | 1 | µA | EN = VIN or GND | 5 |
| Power good threshold voltage rising | VTH_PG | 92 | 95 | 98 | %VOUT | Rising (%VOUT) | 5 |
| Power good threshold voltage falling | VTH_PG | 87 | 90 | 93 | %VOUT | Falling (%VOUT) | 5 |
| Power good output low voltage | VOL_PG |  | 0.07 | 0.3 | V | IPG = -2 mA | 5 |
| Input leakage current (PG) | ILKG_PG |  | 1 | 400 | nA | VPG = 1.8 V | 5 |
| High-side MOSFET ON-resistance | RDS(ON) |  | 300 | 600 | mΩ | VIN ≥ 6 V | 5 |
| High-side MOSFET ON-resistance | RDS(ON) |  | 430 |  | mΩ | VIN = 3 V | 5 |
| Low-side MOSFET ON-resistance | RDS(ON) |  | 120 | 200 | mΩ | VIN ≥ 6 V | 5 |
| Low-side MOSFET ON-resistance | RDS(ON) |  | 165 |  | mΩ | VIN = 3 V | 5 |
| High-side MOSFET forward current limit | ILIMF | 0.85 | 1.05 | 1.35 | A | VIN = 12 V, TJ= 25°C | 5 |
| Internal reference voltage | VREF |  | 0.8 |  | V |  | 5 |
| Initial output voltage accuracy (PWM) |  | -3 |  | 3 | % | PWM mode operation, VIN ≥ VOUT + 1 V | 5 |
| Initial output voltage accuracy (power save) |  | -3.5 |  | 4 | % | Power save mode operation, COUT= 22 µF | 5 |
| DC output voltage load regulation |  |  | 0.05 |  | %/A | VIN = 12 V, VOUT = 3.3 V, PWM mode operation | 5 |
| DC output voltage line regulation |  |  | 0.02 |  | %/V | 3 V ≤ VIN ≤ 17 V, VOUT = 3.3 V, IOUT = 0.5 A, PWM mode operation | 5 |
| Junction-to-ambient thermal resistance | RθJA |  | 61.8 |  | °C/W |  | 4 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 61.3 |  | °C/W |  | 4 |
| Junction-to-board thermal resistance | RθJB |  | 15.5 |  | °C/W |  | 4 |
| Junction-to-top characterization parameter | ψJT |  | 0.4 |  | °C/W |  | 4 |
| Junction-to-board characterization parameter | ψJB |  | 15.4 |  | °C/W |  | 4 |
| Junction-to-case (bottom) thermal resistance | RθJC(bot) |  | 8.6 |  | °C/W |  | 4 |

## CAD (KiCad official)

- Symbol: `TPS62171DSGR`
- Footprint: `Package_SON:WSON-8-1EP_2x2mm_P0.5mm_EP0.9x1.6mm`
- 3D model: WSON-8-EP(2x2) (KiCad packages3D, STEP)
- 3D model files: `tps62171dsgr-etched.step` / `tps62171dsgr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps62171dsgr.step` / `tps62171dsgr.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/tps62171.pdf) (37 pp, sha256 `8cb209c1347d758a`, retrieved 2026-11-05, 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/tps62171dsgr-datasheet.pdf)