# TPS40057PWP

**Texas Instruments** · DC-DC Converters · HTSSOP-16-EP

TPS40057PWP from Texas Instruments, in a HTSSOP-16-EP. 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 | KFF | input | Resistor connection to VIN for voltage feedforward and UVLO level programming. |
| 2 | RT | input | Resistor connection to ground for internal oscillator and switching frequency programming. |
| 3 | BP5 | power_out | 5-V reference output, bypass with 0.1-µF capacitor, maximum 1 mA external load. |
| 4 | SYNC | input | Synchronization input to synchronize oscillator to external frequency or connect to SGND if unused. |
| 5 | SGND | power_in | Signal ground reference for the device. |
| 6 | SS/SD | input | Soft-start/shutdown pin with 2.3 µA charging current; output rise at 0.85 V, regulation at 1.55 V, shutdown below 125 mV. |
| 7 | VFB | input | Inverting input to error amplifier, equal to internal 0.7 V reference in normal operation. |
| 8 | COMP | output | Error amplifier output and PWM comparator input, internally clamped for improved large signal transient response. |
| 9 | PGND | power_in | Power ground reference with low-impedance path to lower MOSFET source. |
| 10 | LDRV | output | Gate drive output for N-channel synchronous rectifier, switches from BP10 (on) to ground (off). |
| 11 | BP10 | power_out | 10-V reference for N-channel synchronous rectifier gate drive, maximum 1 mA external load, bypass with 1-µF capacitor. |
| 12 | SW | input | Switched node connection for overcurrent sensing and zero current detection. |
| 13 | HDRV | output | Floating gate drive output for high-side N-channel MOSFET, switches from BOOST (on) to SW (off). |
| 14 | BOOST | output | Gate drive voltage output for high-side MOSFET, 9 V greater than SW voltage; connect 0.1-µF capacitor to lower MOSFET drain. |
| 15 | VIN | power_in | Supply voltage input, 8 V to 40 V recommended operating range. |
| 16 | ILIM | input | Current limit setting pin with internal current sink for overcurrent threshold programming compared to high-side MOSFET voltage drop. |
| 17 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HTSSOP-16-EP |
| Category | Power Management (PMIC) |
| Pins | 17 |

## CAD (KiCad official)

- Symbol: `TPS40057PWP`
- Footprint: `Package_SO:TSSOP-16-1EP_4.4x5mm_P0.65mm`
- 3D model: HTSSOP-16-EP (KiCad packages3D, STEP)
- 3D model files: `tps40057pwp-etched.step` / `tps40057pwp-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tps40057pwp.step` / `tps40057pwp.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/tps40057) (43 pp, sha256 `8efd3db408deb44b`, retrieved 2026-10-07, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-4-5-20251001` (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/tps40057pwp-datasheet.pdf)