UC2842BD1R2G

@@ -0,0 +1,54 @@+# UC2842BD1R2G++**onsemi** · AC-DC Controllers and Regulators · SOIC-8++UC2842BD1R2G from onsemi, in a SOIC-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 | Compensation | output | Error amplifier output; typically connected via compensation network back to pin 2 (Voltage Feedback) to set loop response. Also serves as the input to the PWM comparator internally. Voltage range 0 to 7.2 V max. |+| 2 | Voltage Feedback | input | Inverting input of the error amplifier. Normally connected through a resistor divider to the converter output for regulation; nominal reference at this pin is 2.5 V. Input voltage range -0.3 to +5.5 V. |+| 3 | Current Sense | input | Non-inverting input of the current sense comparator; senses the primary switch current via a shunt resistor. Cycle-by-cycle current limiting threshold is nominally 1.0 V. Input voltage range -0.3 to +5.5 V. |+| 4 | RT/CT | passive | Oscillator timing pin. Connect a timing resistor (RT) from Vref to this pin and a timing capacitor (CT) from this pin to GND to set the oscillator frequency (guaranteed to 250 kHz, operable to 500 kHz). |+| 5 | GND | power_in | Signal and power ground reference for the device. In the SOIC-8 package this is the single common ground (SOIC-14 splits it into separate signal GND and Power Ground). |+| 6 | Output | output | High-current totem-pole PWM gate-drive output for a power MOSFET. Peak output current 1.0 A source or sink; typical rise/fall time 50 ns into 1.0 nF. Output swings between GND and VCC. |+| 7 | VCC | power_in | Positive supply input for control logic and the output stage. UCX842B startup UVLO threshold is 16 V (typ) with 10 V (typ) minimum operating voltage after turn-on. Absolute maximum 30 V; internal zener clamps at ~36 V. |+| 8 | Vref | power_out | Buffered 5.0 V reference output (trimmed, 5.0 V ±1% at 1 mA), used to bias the oscillator timing network and can supply modest external loads. Short-circuit current limited (-30 to -180 mA). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `UC2842BD1R2GD1`+- `UC2842BD1R2GD1G`+- `UC2842BD1R2GD1R2G`+- `UC2842BD1R2GN`+- `UC2842BD1R2GNG`+- `UC2842BD1R2GD`+- `UC2842BD1R2GDG`+- `UC2842BD1R2GDR2G`++## CAD (KiCad official)++- Symbol: `UC2842BD1R2G`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOIC-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [onsemi datasheet](https://www.onsemi.com/pdf/datasheet/uc2842bd1r2-d.pdf) (22 pp, sha256 `581ae31fbd1f3e07`, retrieved 2026-08-17, tier: manufacturer)+- **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/uc2842bd1r2g-datasheet.pdf)

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