component
UC2844BD1013TR
Public Unreviewedby Ray
STMicroelectronics AC-DC Controllers and Regulators, SO-8. Datasheet-verified pinout, 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
markdownUC2844BD1013TR
STMicroelectronics · AC-DC Controllers and Regulators · SO-8
UC2844BD1013TR 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. Typically connected back to VFB (pin 2) through a compensation network Zf. |
| 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. |
| 3 | ISENSE | input | Current sense input. A voltage proportional to inductor/switch current is connected to this pin; the PWM uses this information to terminate output switch conduction. Max input signal ~1V. |
| 4 | RT/CT | passive | Oscillator timing pin. Oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to VREF and capacitor CT to ground. Operation up to 500kHz possible. |
| 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 drive output for driving a power MOSFET. Sources and sinks peak currents up to ±1A. |
| 7 | VCC | power_in | Positive supply for the control IC (Vi). Max 30V (self-limiting via internal zener ~36V). For UC2844B, UVLO turn-on threshold ~16V, turn-off ~10V. |
| 8 | VREF | power_out | Trimmed 5V reference output (5.00V typ, ±1% at 25°C, 50mA capable). Provides charging current for oscillator capacitor CT through resistor RT. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | SO-8 |
| Category | PMIC |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
UC2844BD1013TRUC2844BN
CAD (KiCad official)
- Symbol:
UC2844BD1013TR - Footprint:
Package_SO:TI_SO-PowerPAD-8 - 3D model: SO-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (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).