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UC2844G-S08-R

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UTC(Unisonic Tech) DC-DC Controllers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsuc2844g-s08-rfactory-2.0.0extractor-text

Verified UC2844G-S08-R

by Ray · last 6 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

6 Nov 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: UC2844G-S08-R · SOP-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 7-page datasheet
  • •distributor (warn): no ['digikey', 'mouser'] number
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-07zi4zft/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • •package_fit (skip): no component.package_dims on the page: the model is unchecked against the datasheet drawing
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓symbol_text: no pin names collide
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ uc2844g-s08-r.kicad_sym✓ uc2844g-s08-r.kicad_mod✓ uc2844g-s08-r.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs Publish 0.1.0 · Ray 23h ago
viewers uc2844g-s08-r: viewers · Ray 23h ago
package.json Publish 0.1.0 · Ray 23h ago
page.json Set visibility: public · Ray 23h ago
README.md Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r-etched.glb Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r-etched.step uc2844g-s08-r: factory component page (tier=mfr) · Ray 23h ago
uc2844g-s08-r-hero.glb uc2844g-s08-r: hero GLB from the etched model (keeps the MPN mark) · Ray 23h ago
uc2844g-s08-r-hero.overlay.json Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r.glb Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r.kicad_mod Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r.kicad_sym Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r.lbr Publish 0.1.0 · Ray 23h ago
uc2844g-s08-r.step Publish 0.1.0 · Ray 23h ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 23h ago

UC2844G-S08-R

UTC(Unisonic Tech) · DC-DC Controllers · SOP-8

UC2844G-S08-R from UTC(Unisonic Tech), in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 Compensation output Error amplifier output, made available for loop compensation.
2 VFB input Voltage feedback, the inverting input of the error amplifier, normally connected to the supply output through a resistor divider (max input -0.3 to +5.5 V).
3 ISENSE input Current sense input receiving a voltage proportional to inductor current, used by the PWM to terminate output switch conduction (max input -0.3 to +5.5 V).
4 RT/CT passive Oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to Vref and capacitor CT to ground.
5 GND power_in Power ground.
6 Output output Directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1 A, switching at one-half the oscillator frequency.
7 VCC power_in Positive supply (UC2844 UVLO thresholds 16 V on and 10 V off).
8 VREF power_out 5.0 V reference output that provides charging current for capacitor CT through resistor RT.

Key specifications

Parameter Value
Manufacturer UTC(Unisonic Tech)
Package SOP-8
Category Power Management ICs
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Total Power Supply and Zener Current ICC+Iz 30 mA 4
Output Current, Source or Sink IOUT 1 A Note 2 4
Output Energy (Capacitive Load per cycle) W 5 μJ 4
Current Sense and Voltage feedback Inputs VIN -0.3 5.5 V 4
Error Amp Output Sink Current ISINK 10 mA 4
Power Dissipation PD 862 mW 4
Junction Temperature TJ 150 °C 4
Operating Junction Temperature TJ(OPR) -40 120 °C 4
Storage Temperature Range TSTG -65 150 °C 4
Reference Output Voltage VREF 4.95 5 5.05 V IOUT=1.0mA,TJ=25 C 4
Line Regulation ΔVOUT 2 20 mV VCC=12V ~ 25V 4
Load Regulation ΔVOUT 3 25 mV IOUT=1.0mA ~ 20mA 4
Total Output Variation over Line, Load, Temperature VREF 4.9 5.1 V 4
Output Short Circuit Current ISC -180 -85 -30 mA 4
Discharge Current IDSG 10.8 mA VOSC=2.0V, TJ=25°C 4
Oscillator Frequency fOSC 47 52 57 kHz TJ=25°C 4
Oscillator Frequency over temperature range fOSC 46 60 kHz TLOW ≤ TA ≤ THI 4
Frequency Change with Voltage ΔfOSC/ΔV 0.2 1 % VCC=12V ~ 25V 4
Frequency Change with Temperature ΔfOSC/ΔT 5 % TLOW ≤ TA ≤ THI 4
Voltage Feedback Input VFB 2.45 2.5 2.55 V VOUT=2.5V 4
Output Voltage Swing High VOH 5 6.2 V RL=15k to ground, VFB=2.3V 4
Output Voltage Swing Low VOL 0.8 1.1 V RL=15k to VREF, VFB=2.7V 4
Error Amp Sink Output Current ISINK 2 12 mA VOUT=1.1V, VFB=2.7V 4
Error Amp Source Output Current ISOURCE -1 -0.5 mA VOUT=5.0V, VFB=2.3V 4
Input Bias Current II(BIAS) -1 -0.1 μA VFB=2.7V 4
Open Loop Voltage Gain GVO 65 90 dB VOUT=2.0V ~ 4.0V 4
Power Supply Rejection Ratio (error amp) PSRR 60 70 dB VCC=12V ~ 25V 4
Unity Gain Bandwidth GBW 0.7 1 MHz TJ=25°C 4
Thermal Resistance (Junction-to-Air) θJA 145 °C/W 4
Current Sense Input Voltage Gain GV 2.85 3 3.15 V/V Note 2 & 3 5
Maximum Current Sense Input Threshold VI(THR) 0.9 1 1.1 V Note 2 5
Current Sense Input Bias Current II(BIAS) -10 -2 μA 5
Propagation Delay tPLH(IN/OUT) 150 300 ns 5
Output Voltage Low VOL 0.1 0.4 V ISINK=20mA 5
Output Voltage Low VOL 1.6 2.2 V ISINK=200mA 5
Output Voltage High VOH 13 13.5 V ISINK=20mA 5
Output Voltage High VOH 12 13.4 V ISINK=200mA 5
Output Voltage with UVLO Activated VOL(UVLO) 0.1 1.1 V VCC=6.0V, ISINK=1.0mA 5
Output Voltage Rise Time tR 50 150 ns CL=1.0nF,TJ=25°C 5
Output Voltage Fall Time tF 50 150 ns CL=1.0nF,TJ=25°C 5
Startup Threshold (UC2844) VTHR 15 16 17 V UC2844 5
Minimum Operating Voltage After Turn-On (UC2844) VCC(MIN) 9 10 11 V UC2844 5
Max Duty Cycle DCMAX 47 48 50 % 5
Power Supply Zener Voltage VZ 30 36 V ICC=25mA 5
Power Supply Current (UC2844) ICC 12 17 mA VCC=14V 5

CAD (KiCad official)

  • Symbol: UC2844G-S08-R
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: uc2844g-s08-r-etched.step / uc2844g-s08-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc2844g-s08-r.step / uc2844g-s08-r.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: UTC(Unisonic Tech) datasheet (7 pp, sha256 ad43141a5676bb47, retrieved 2026-11-06, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF