ST1S14PHR from STMicroelectronics, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	BOOT	passive	Bootstrap capacitor pin for the N-channel high-side gate driver. Connect a 100 nF low-ESR ceramic capacitor between BOOT and SW. Absolute max 55 V.
2	PG	output	Power good open-collector output. Asserts when VFB reaches ~0.92VOUT (rising) and de-asserts at ~0.8VOUT (falling). VOL ≤ 0.4 V at ISINK = 6 mA. Requires an external pull-up. Absolute max -0.3 to (VIN+0.3) V.
3	EN1	input	Active-low enable input. Device is ON when EN1 is low (≤0.5 V) and EN2 is high (≥1.5 V). Biasing current ~1.6 µA at 5 V. Absolute max -0.3 to 7 V.
4	FB	input	Feedback voltage input to the error amplifier. Internal reference is typ. 1.22 V (1.202-1.239 V). Bias current ≤50 nA. Connect to the external resistor divider from VOUT. Absolute max -0.3 to 3 V.
5	EN2	input	Active-high enable input. Device is ON only when EN2 is high (≥1.5 V) and EN1 is low. Biasing current up to 10 µA. Absolute max -0.3 to (VIN+0.3) V.
6	GND	power_in	Device ground. The exposed pad must also be soldered to this ground plane for proper thermal and electrical performance.
7	VIN	power_in	Input supply pin. Operating range 5.5 V to 48 V; absolute max 52 V. Decouple locally with a low-ESR ceramic input capacitor.
8	SW	power_out	Switching node - drain of the internal N-channel power MOSFET. Connect to the external inductor and freewheeling Schottky diode. Absolute max -1 to (VIN+0.3) V.
EP	EP	power_in	Exposed thermal pad on the underside of the HSOP-8 package. Must be soldered to the GND plane to provide the primary thermal path (RthJA ≈ 40 °C/W) and complete the ground connection.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOIC-8
Category	PMIC
Pins	9

Ordering variants

Same part, different packaging or reel option.

ST1S14PHR

CAD (KiCad official)

Symbol: ST1S14PHR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`st1s14phr.step`	122 KB	You want the bare part, or you mark your own boards.
`st1s14phr-etched.step`	1.8 MB	You want the part with `ST1S14PHR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 463 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: STMicroelectronics datasheet (46 pp, sha256 c72a54d61a0f530a, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF