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78D05G-AA3-R

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UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-223-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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78D05G-AA3-R

UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-223-4

78D05G-AA3-R from UTC Unisonic Tech, in a SOT-223-4. 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 I power_in Unregulated input voltage to the regulator; absolute maximum input voltage is 35 V, and a 0.33 µF input bypass capacitor should be placed as close to the regulator as possible.
2 G power_in Ground (common) reference pin for the regulator.
3 O power_out Regulated 5 V output for the 78D05, rated for output current up to 0.5 A, with a 0.1 µF output bypass capacitor recommended for stability and transient response.
4 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer UTC Unisonic Tech
Package SOT-223-4
Category Power Management (PMIC)
Pins 4

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Output Voltage VOUT 4.8 5 5.2 V IOUT=5mA~0.5A 4
Output Voltage VOUT 4.75 5.25 V VIN =7.520V,IOUT=5mA0.5A 4
Load Regulation ΔVOUT 50 mV IOUT=5mA~0.5A 4
Load Regulation ΔVOUT 25 mV IOUT=5mA~200 mA 4
Line Regulation ΔVOUT 50 mV VIN =7V~25V 4
Quiescent Current IQ 8 mA IOUT=0.5A 4
Quiescent Current Change ΔIQ 1 mA VUT =7.5~20V 4
Quiescent Current Change ΔIQ 0.5 mA IOUT=5mA~0.5A 4
Ripple Rejection RR 62 80 dB VIN =8~18V,f=120Hz 4
Input Voltage VIN 35 V 4
Output Current IOUT 0.5 A 4
Power Dissipation (SOT-223) PD 8.3 W TC=25°C 4
Operating Junction Temperature TJ -20 150 °C 4
Storage Temperature TSTG -65 150 °C 4
Junction to Case Thermal Resistance (SOT-223) θJC 15 °C/W 4

CAD (KiCad official)

  • Symbol: 78D05G-AA3-R
  • Footprint: Package_TO_SOT_SMD:SOT-223
  • 3D model: SOT-223-4 (KiCad packages3D, STEP)
  • 3D model files: 78d05g-aa3-r-etched.step / 78d05g-aa3-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78d05g-aa3-r.step / 78d05g-aa3-r.glb are the bare package body.

Provenance

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

  • Datasheet: UTC Unisonic Tech datasheet (9 pp, sha256 bdaf2be9f0e23b0e, retrieved 2026-10-13, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-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