component

UC3844BNG

Public Made by Adom

by adom

onsemi AC-DC Controllers & Regulators, DIP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsuc3844bngfactory-2.0.0extractor-text

Verified UC3844BNG

by Ray · last 7 Nov 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

7 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: UC3844BNG · DIP-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 19-page datasheet
  • ✓distributor: lcsc C5291, digikey 2156-UC3844BNG-OS-ND, mouser 863-UC3844BNG
  • ✓family: DIP-8_W7.62mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-7al9lv01/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✓ uc3844bng.kicad_sym✓ uc3844bng.kicad_mod✓ uc3844bng.step
Spot something wrong? Report it as an issue Propose a fix Records are signed by members of adom.
Overview Files Discover Packages Releases Dependencies Issues Breadcrumbs Pull Requests Activity
main
uc3844bng / README.md
History Download
Ray Publish 0.1.0 ca4583c 9h ago

UC3844BNG

onsemi · AC-DC Controllers & Regulators · DIP-8

UC3844BNG from onsemi, in a DIP-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; sink current max 10 mA.
2 Voltage Feedback input Inverting input of the Error Amplifier, normally connected to the supply output through a resistor divider; input range -0.3 to +5.5 V.
3 Current Sense input Receives a voltage proportional to inductor current, used by the PWM to terminate output switch conduction; input range -0.3 to +5.5 V.
4 RT/CT passive Oscillator frequency and maximum output duty cycle are set by resistor RT to Vref and capacitor CT to ground; operation down to 1.0 kHz is possible.
5 GND power_in Combined control circuitry and power ground.
6 Output output Directly drives the gate of a power MOSFET, sourcing and sinking peak currents up to 1.0 A, switching at one-half the oscillator frequency.
7 VCC power_in Positive supply of the control IC; rated 36 V maximum (zener clamped), total supply plus zener current 30 mA.
8 Vref power_out 5.0 V reference output that provides charging current for capacitor CT through resistor RT.

Key specifications

Parameter Value
Manufacturer onsemi
Package DIP-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
Reference Output Voltage Vref 4.9 5 5.1 V IO = 1.0 mA, TJ = 25 C 2
Total Output Variation over Line, Load and Temperature Vref 4.82 5.18 V 2
Line Regulation Regline 2 20 mV VCC = 12 V to 25 V 2
Load Regulation Regload 3 25 mV IO = 1.0 mA to 20 mA 2
Output Short Circuit Current ISC -30 -85 -180 mA 2
Oscillator Frequency fOSC 49 52 55 kHz TJ = 25 C 2
Oscillator Frequency over temperature range fOSC 48 56 kHz TA = Tlow to Thigh 2
Oscillator Frequency fOSC 225 250 275 kHz TJ = 25 C, RT = 6.2 k, CT = 1.0 nF 2
Frequency Change with Voltage fOSC/V 0.2 1 % VCC = 12 V to 25 V 2
Discharge Current Idischg 7.8 8.3 8.8 mA VOSC = 2.0 V, TJ = 25 C 3
Discharge Current over temperature range Idischg 7.6 8.8 mA VOSC = 2.0 V, TA = Tlow to Thigh 3
Voltage Feedback Input VFB 2.42 2.5 2.58 V VO = 2.5 V 3
Open Loop Voltage Gain AVOL 65 90 dB VO = 2.0 V to 4.0 V 3
Unity Gain Bandwidth BW 0.7 1 MHz TJ = 25 C 3
Power Supply Rejection Ratio (error amp) PSRR 60 70 dB VCC = 12 V to 25 V 3
Output Current - Sink ISink 2 12 mA VO = 1.1 V, VFB = 2.7 V 3
Output Current - Source ISource -0.5 -1 mA VO = 5.0 V, VFB = 2.3 V 3
Current Sense Input Voltage Gain AV 2.85 3 3.15 V/V Notes 9 and 10 3
Maximum Current Sense Input Threshold Vth 0.9 1 1.1 V Note 9 3
Current Sense Power Supply Rejection Ratio PSRR 70 dB VCC = 12 V to 25 V (Note 9) 3
Propagation Delay (Current Sense Input to Output) tPLH(In/Out) 150 300 ns 3
Output Voltage with UVLO Activated VOL(UVLO) 0.1 1.1 V VCC = 6.0 V, ISink = 1.0 mA 3
Output Voltage Rise Time tr 50 150 ns CL = 1.0 nF, TJ = 25 C 3
Output Voltage Fall Time tf 50 150 ns CL = 1.0 nF, TJ = 25 C 3
Startup Threshold Vth 14.5 16 17.5 V UCX844B 3
Minimum Operating Voltage After Turn-On VCC(min) 8.5 10 11.5 V UCX844B 3
Duty Cycle Maximum DC(max) 47 48 50 % UC384xB 4
Duty Cycle Minimum DC(min) 0 % 4
Power Supply Current Operating ICC 12 17 mA Note 11 4
Power Supply Zener Voltage VZ 30 36 V ICC = 25 mA 4
Bias and Driver Voltages VCC, VC 36 V Zero series impedance 2
Total Power Supply and Zener Current ICC + IZ 30 mA 2
Output Current, Source or Sink IO 1 A Note 2 2
Output Energy (Capacitive Load per Cycle) W 5 J 2
Current Sense and Voltage Feedback Inputs Vin -0.3 5.5 V 2
Error Amp Output Sink Current IO 10 mA 2
Maximum Power Dissipation (N suffix PDIP-8, Case 626) PD 1.25 W TA = 25 C 2
Thermal Resistance, Junction-to-Air (N suffix PDIP-8) RJA 100 C/W 2
Operating Junction Temperature TJ 150 C 2
Operating Ambient Temperature (UC3844B) TA 0 70 C UC3844B, UC3845B 2
Storage Temperature Range Tstg -65 150 C 2
Temperature Stability TS 0.2 mV/C 2
Output Noise Voltage Vn 50 V f = 10 Hz to 10 kHz, TJ = 25 C 2
Long Term Stability S 5 mV TA = 125 C for 1000 Hours 2
Frequency Change with Temperature fOSC/T 0.5 % TA = Tlow to Thigh 2
Oscillator Voltage Swing (Peak-to-Peak) VOSC 1.6 V 2

CAD (KiCad official)

  • Symbol: UC3844BNG
  • Footprint: Package_DIP:DIP-8_W7.62mm
  • 3D model: DIP-8 (KiCad packages3D, STEP)
  • 3D model files: uc3844bng-etched.step / uc3844bng-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); uc3844bng.step / uc3844bng.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (19 pp, sha256 e69ff39fc0ea9e08, retrieved 2026-11-07, 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