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LD2985G-50-AF5-R

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UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-25. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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LD2985G-50-AF5-R

UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-25

LD2985G-50-AF5-R from UTC Unisonic Tech, in a SOT-25. 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 IN power_in Input port of the regulator; the DC input voltage absolute maximum is 16 V.
2 GND power_in Ground pin.
3 INHIBIT input Control input that switches the output on and off; it is not internally pulled up and cannot be left floating, the device is disabled when pulled to GND or to a voltage below 0.18 V, with VIL max 0.15 V and VIH min 2 V.
4 Bypass passive Bypass pin where a capacitor is connected to GND to improve thermal noise performance; a CBYP of 10 nF reduces output noise to 30 μVrms.
5 OUT power_out Regulated output port.

Key specifications

Parameter Value
Manufacturer UTC Unisonic Tech
Package SOT-25
Category Power Management (PMIC)
Pins 5

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 4.9 5 5.1 V VIN=6.0V 12
Output Voltage VOUT 4.85 5.15 V IOUT=1 ~ 150mA 12
Short Circuit Current ISC 600 mA RL=0 12
Line Regulation △VOUT 30 mV VIN=VOUT+1V ~ 16V, IOUT=1mA 12
Dropout Voltage VD 1 3 mV IOUT=0 12
Dropout Voltage VD 7 10 mV IOUT=1mA 12
Dropout Voltage VD 40 60 mV IOUT=10mA 12
Dropout Voltage VD 120 150 mV IOUT=50mA 12
Dropout Voltage VD 280 350 mV IOUT=150mA 12
Quiescent Current IQ 80 100 μA IOUT=0 12
Quiescent Current IQ 100 150 μA IOUT=1mA 12
Quiescent Current IQ 280 330 μA IOUT=10mA 12
Quiescent Current IQ 1050 1300 μA IOUT=50mA 12
Quiescent Current IQ 2900 3300 μA IOUT=150mA 12
Control Input Logic Low VIL 0.15 V 12
Control Input Logic High VIH 2 V 12
Control Input Current IINH 5 30 μA 12
Control Input Current IINH -1 0 μA 12
Operating Input Voltage VI(OPR) 16 V 12
OFF MODE quiescent current 1.5 μA VINH<0.18V 12
Output Noise Voltage eN 30 μV B=300Hz ~ 50KHz, CBYP=0.01μF, CO=10μF 12
Supply Voltage Rejection SVR 45 dB CBYP=0.01μF, CO=10μF, f=1KHz 12
DC Input Voltage ViN 16 V 4
INHIBIT Input Voltage VINH 16 V 4
Operating Junction Temperature TOPR -40 125 °C Note 2: determined from design only, not 100% tested 4
Storage Temperature TSTG -40 150 °C 4
Junction to Case thermal resistance θJC 81 °C/W 4

CAD (KiCad official)

  • Symbol: LD2985G-50-AF5-R
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-25 (KiCad packages3D, STEP)
  • 3D model files: ld2985g-50-af5-r-etched.step / ld2985g-50-af5-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ld2985g-50-af5-r.step / ld2985g-50-af5-r.glb are the bare package body.

Provenance

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

  • Datasheet: UTC Unisonic Tech datasheet (16 pp, sha256 c884d1a5cff07166, retrieved 2026-10-18, 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