component

A7986ATR

Public Made by Adom

by adom

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

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Generated by kicad-footprint-generator · KiCad file format 20260206
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A7986ATR

STMicroelectronics · DC-DC Converters · SOIC-8

A7986ATR from STMicroelectronics, in a SOIC-8. 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 output DC voltage is limited to -0.3 V to VCC per the absolute maximum ratings.
2 SYNCH bidirectional Master/slave synchronization pin: left floating it outputs a signal half a period out of phase with power turn-on, and when driven by an external signal above the internal frequency the device synchronizes to it with zero phase shift; its analog pin voltage is limited to -0.3 V to 4 V.
3 EN input Active-high enable: the device is ON above 1.2 V and OFF below 0.3 V, with the pin rated -0.3 V to VCC.
4 COMP output Error amplifier output used for loop frequency compensation; its analog pin voltage is limited to -0.3 V to 4 V.
5 FB input Feedback input: connecting VOUT directly regulates the output at 0.6 V (VFB 0.588 V to 0.612 V), and higher voltages require an external resistor divider from VOUT; the feedback voltage is rated -0.3 V to 1.5 V.
6 FSW passive Switching frequency set pin: an external resistor to ground raises the frequency above the 250 kHz free-running value (up to 1 MHz with RFSW = 33 kΩ), and leaving it floating gives 250 kHz; the analog pin voltage is limited to -0.3 V to 4 V.
7 GND power_in Ground reference for the device.
8 VCC power_in Unregulated DC input voltage with an operating range of 4.5 V to 38 V and an absolute maximum of 45 V.

Key specifications

Parameter Value
Manufacturer STMicroelectronics
Package SOIC-8
Category Power Management (PMIC)
Pins 8

CAD (KiCad official)

  • Symbol: A7986ATR
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: a7986atr-etched.step / a7986atr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); a7986atr.step / a7986atr.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: lcsc)
  • 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