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A7986A

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STMicroelectronics DC-DC Converters, HSOP-8-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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A7986A

STMicroelectronics · DC-DC Converters · HSOP-8-EP

A7986A from STMicroelectronics, in a HSOP-8-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 OUT power_out Regulator output; the DC voltage at this pin is specified from -0.3 V to VCC (absolute maximum ratings).
2 SYNCH input Master/slave synchronization pin: left floating it gives a half-period phase-shifted signal, and an external signal above the internal frequency synchronizes the device with zero phase shift; absolute analog pin range is -0.3 V to 4 V.
3 EN input Active-high enable: the device is ON with EN above 1.2 V and OFF with EN below 0.3 V; the EN pin absolute range is -0.3 V to VCC.
4 COMP passive Error amplifier output used for loop frequency compensation; absolute analog pin range is -0.3 V to 4 V.
5 FB input Feedback input: connecting VOUT directly regulates the output at 0.6 V, otherwise an external resistor divider from VOUT is required; the feedback voltage absolute range is -0.3 V to 1.5 V.
6 FSW input Switching frequency set pin: an external resistor to ground increases the frequency, and leaving it floating gives the free-running 250 kHz; absolute analog pin range is -0.3 V to 4 V.
7 GND power_in Ground reference for the device.
8 VCC power_in Unregulated DC input voltage; the operating input range is 4.5 V to 38 V and the absolute maximum is 45 V.
9 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package HSOP-8-EP
Category Power Management (PMIC)
Pins 9

CAD (KiCad official)

  • Symbol: A7986A
  • Footprint: Package_SO:SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.41x3.3mm
  • 3D model: HSOP-8-EP (KiCad packages3D, STEP)
  • 3D model files: a7986a-etched.step / a7986a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a7986a.step / a7986a.glb are the bare package body.

Provenance

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

  • Datasheet: STMicroelectronics datasheet (42 pp, sha256 a76d19b8a435a683, 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