MAX861IUA+

@@ -0,0 +1,54 @@+# MAX861IUA+++**Analog Devices Inc Maxim Integrated** · DC-DC Converters · MSOP-8++MAX861IUA+ from Analog Devices Inc Maxim Integrated, in a MSOP-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 | FC | input | Frequency Control input. Selects one of three switching frequencies per Table 1: FC=VDD or open ~13kHz, FC=GND ~100kHz, FC=OUT ~250kHz (MAX861). FC input current is only -2 to -4 uA when FC<4V. |+| 2 | C1+ | passive | Flying-Capacitor Positive Terminal. Connect the positive terminal of the flying (pump) capacitor C1 (typically 2.2 uF at 250 kHz) between C1+ and C1-. |+| 3 | GND | power_in | Ground reference in inverter mode. In doubler mode, this pin becomes the Positive Input Supply - the input voltage is applied between pin 3 (positive) and pin 5 (which serves as ground). |+| 4 | C1- | passive | Flying-Capacitor Negative Terminal. Connect the negative terminal of the flying (pump) capacitor C1 between C1+ (pin 2) and C1- (pin 4). |+| 5 | OUT | power_out | Charge-pump output. In inverter mode this is the Negative Output (-VIN nominal). In doubler mode this pin becomes Ground. Sources/sinks up to 50 mA with ~12 ohm typical output resistance. |+| 6 | LV | input | Low-Voltage-Operation input. Connect to GND for inverting operation (may be floated if VDD > 3V for MAX660/ICL7660 compatibility). In doubler mode, must be connected to OUT for all input voltages. |+| 7 | SHDN | input | Active-Low Shutdown input. Drive low (<0.3 V) to shut down the charge pump (supply current drops below 1 uA). Drive high (>1.2 V) to enable. In inverter mode, tie to VDD if unused; in doubler mode, tie to GND if unused. Do not leave floating. |+| 8 | VDD | power_in | Positive Input Supply in inverter mode (+1.5V to +5.5V). In doubler mode this pin becomes the Doubled Positive Output (approximately 2 x VIN). Absolute maximum VDD to GND is +6.0V. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Analog Devices Inc Maxim Integrated |+| Package | MSOP-8 |+| Category | Power Management (PMIC) |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `MAX861IUA+`+- `MAX861IUA+ISA`+- `MAX861IUA+ESA`+- `MAX861IUA+MSA`+- `MAX861IUA+MJA`+- `MAX861IUA+C/D`++## CAD (KiCad official)++- Symbol: `MAX861IUA+`+- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`+- 3D model: MSOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Analog Devices Inc Maxim Integrated datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588950792086958080) (None pp, sha256 `924043bfeecf2e5f`, retrieved 2026-08-17, tier: lcsc)+- **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](docs/max861iua-datasheet.pdf)

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