UC3842BVD1R2G

@@ -0,0 +1,62 @@+# UC3842BVD1R2G++**onsemi** · DC-DC Converters · SOIC-8++UC3842BVD1R2G 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 made available for loop compensation. Typically an RC compensation network is tied from this pin to the Voltage Feedback pin (pin 2) to shape the control-loop response. |+| 2 | Voltage Feedback | input | Inverting input of the Error Amplifier. Normally connected to the switching power supply output through a resistor divider; regulated to the internal 2.5 V reference (VFB typ 2.5 V). |+| 3 | Current Sense | input | A voltage proportional to the switching inductor current is connected here. The PWM comparator uses this signal (max threshold ~1.0 V) to terminate output switch conduction on a cycle-by-cycle basis. |+| 4 | RT/CT | passive | Oscillator timing pin. Frequency and maximum duty cycle are programmed by connecting timing resistor RT from Vref to this pin and timing capacitor CT from this pin to GND. Operation up to 500 kHz is possible. |+| 5 | GND | power_in | Combined control-circuitry and power ground return for the SOIC-8/PDIP-8 package. All bypass capacitors and the source of the external power MOSFET return here. |+| 6 | Output | output | High-current totem-pole gate driver output. Directly drives the gate of a power MOSFET; peak source and sink currents up to 1.0 A. Rise/fall times typically 50 ns into 1.0 nF. |+| 7 | VCC | power_in | Positive supply of the control IC. UCX842B (BV) has UVLO thresholds of 16 V (on) and 10 V (off); absolute max 30 V. Bypass with a low-ESR capacitor close to the pin. |+| 8 | Vref | power_out | Trimmed 5.0 V reference output (typ 5.0 V, tolerance ~5.05/4.95 V). Provides charging current for timing capacitor CT through RT, and is available as an accurate reference for external circuitry (short-circuit limited). |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | onsemi |+| Package | SOIC-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `UC3842BVD1R2GD1`+- `UC3842BVD1R2GD1G`+- `UC3842BVD1R2GD1R2G`+- `UC3842BVD1R2GVD1`+- `UC3842BVD1R2GVD1G`+- `UC3842BVD1R2GVD1R2G`+- `UC3842BVD1R2GN`+- `UC3842BVD1R2GNG`+- `UC3842BVD1R2GVN`+- `UC3842BVD1R2GVNG`+- `UC3842BVD1R2GD`+- `UC3842BVD1R2GDG`+- `UC3842BVD1R2GDR2G`+- `UC3842BVD1R2GVD`+- `UC3842BVD1R2GVDG`+- `UC3842BVD1R2GVDR2G`++## CAD (KiCad official)++- Symbol: `UC3842BVD1R2G`+- 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](docs/uc3842bvd1r2g-datasheet.pdf) (22 pp, sha256 `581ae31fbd1f3e07`, 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/uc3842bvd1r2g-datasheet.pdf)

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