component
A7985ATR
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
markdownA7985ATR
STMicroelectronics · DC-DC Converters · SOIC-8
A7985ATR 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 | output | Regulator output voltage with maximum voltage range -0.3 to VCC per Table 2. |
| 2 | SYNCH | bidirectional | Master/slave synchronization signal; outputs 180° phase-shifted signal when floating, synchronizes to external clock with input range 2-3.3V high / 0-1V low per Table 4. |
| 3 | EN | input | Active-high enable control; device ON when > 1.2V, OFF when < 0.3V, with internal pull-down per Section 5.5. |
| 4 | COMP | output | Error amplifier output for compensation network; output swing 0-3.3V with 19mA source current and 30mA sink current per Table 4. |
| 5 | FB | input | Feedback input for output voltage regulation; compared to internal 0.6V reference with voltage range -0.3 to 1.5V per Table 2. |
| 6 | FSW | input | Switching frequency select input; external resistor to GND sets frequency up to 1MHz, default 250kHz when floating, typical pin voltage 1.254V per Table 4. |
| 7 | GND | power_in | Ground reference return. |
| 8 | VCC | power_in | Unregulated DC input voltage; operating range 4.5 to 38V with 4.5V turn-on threshold per Table 2. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SOIC-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
A7985ATR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
a7985atr-etched.step/a7985atr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);a7985atr.step/a7985atr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (43 pp, sha256
76615cae763f4a5c, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).