UC2845BD1013TR

@@ -0,0 +1,48 @@+# UC2845BD1013TR++**STMicroelectronics** · DC-DC Converters · SO-8++UC2845BD1013TR from STMicroelectronics, in a SO-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 | COMP | output | Error amplifier output made available for loop compensation. Typical output high ~6.2V, output low ~0.8V; sources up to 0.5mA and sinks up to 2mA (min). |+| 2 | VFB | input | Inverting input of the error amplifier. Normally connected to the switching power-supply output through a resistor divider; internal reference is 2.5V. Input bias current typ -0.1uA. |+| 3 | ISENSE | input | Current-sense input. A voltage proportional to inductor/switch current is applied here; the PWM uses this signal to terminate output-switch conduction. Maximum input threshold ~1.0V (Ipk = 1.0V/Rs). |+| 4 | RT/CT | passive | Oscillator timing pin. Connect RT from this pin to VREF and CT from this pin to GND to program oscillator frequency and maximum duty cycle. Operation up to 500kHz. |+| 5 | GROUND | power_in | Combined control-circuitry and power ground return. All voltages are referenced to this pin. |+| 6 | OUTPUT | output | High-current totem-pole gate-driver output for an external power MOSFET. Sources and sinks peak currents up to 1A. Output is held low during UVLO. |+| 7 | VCC | power_in | Positive supply for the control IC (labeled Vi in the block diagram). UC2845B UVLO turn-on ~8.4V, turn-off ~7.6V. Absolute maximum 30V (self-limiting via internal 36V zener). Operating supply current typ 12mA; start-up current <0.5mA. |+| 8 | VREF | power_out | Trimmed 5.0V reference output (5.00V typ, ±1% at 25°C, 50mA rated). Provides charging current for CT through RT and can supply external loads. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | STMicroelectronics |+| Package | SO-8 |+| Category | PMIC |+| Pins | 8 |++## Ordering variants++- `UC2845BD1013TRUC2845BD1`+- `UC2845BD1013TRUC2845BN`++## CAD (KiCad official)++- Symbol: `UC2845BD1013TR`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SO-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [STMicroelectronics datasheet](docs/uc2845bd1013tr-datasheet.pdf) (15 pp, sha256 `fedfd7362400f8b3`, 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/uc2845bd1013tr-datasheet.pdf)

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