component
A7986ATR
Public Made by Adomby adom
STMicroelectronics DC-DC Converters, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownA7986ATR
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);a7986atr.step/a7986atr.glbare 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, primaryclaude-haiku-5-5(text), consensusclaude-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).