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78D15L-TN3-R

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UTC(Unisonic Tech) Linear Voltage Regulators (LDO), TO-252. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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78D15L-TN3-R

UTC(Unisonic Tech) · Linear Voltage Regulators (LDO) · TO-252

78D15L-TN3-R from UTC(Unisonic Tech), in a TO-252. 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 INPUT power_in Unregulated input supply pin; the datasheet's absolute maximum input voltage VIN is 35 V.
2 GND power_in Ground pin (G) of the regulator, shared between input and output return.
3 OUTPUT power_out Regulated fixed-voltage output, rated for output current up to 0.5 A.

Key specifications

Parameter Value
Manufacturer UTC(Unisonic Tech)
Package TO-252
Category Power Management ICs
Pins 3

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 14.4 15 15.6 V IOUT=5mA~0.5A 6
Output Voltage VOUT 14.25 15.75 V VIN =17.530V, IOUT=5mA0.5A 6
Load Regulation ∆VOUT 300 mV IOUT=5mA~0.5A 6
Load Regulation ∆VOUT 150 mV IOUT=5mA~200mA 6
Line Regulation ∆VOUT 300 mV VIN=18.5~30V 6
Quiescent Current IQ 8 mA IOUT=0.5A 6
Quiescent Current Change ∆IQ 1 mA VIN=17.5~30V 6
Quiescent Current Change ∆IQ 0.5 mA IOUT=5mA~0.5A 6
Output Noise Voltage eN 90 μV 10Hz≤f≤100kHz 6
Ripple Rejection RR 51 70 dB VIN=18.5~28.5V, f=120Hz 6
Peak Output Current IPEAK 1.2 A 6
Short-Circuit Current ISC 250 mA VIN=VOUT+19V 6
Dropout Voltage VD 2 V 6
Input Voltage VIN 35 V 4
Output Current IOUT 0.5 A 4
Power Dissipation PD 10 W TC=25°C, TO-251/TO-252 4
Junction Temperature TJ -20 150 °C 4
Storage Temperature TSTG -65 150 °C 4
Junction to Case Thermal Resistance θJC 12.5 °C/W TO-251/TO-252 4

CAD (KiCad official)

  • Symbol: 78D15L-TN3-R
  • Footprint: Package_TO_SOT_SMD:TO-252-2
  • 3D model: TO-252 (KiCad packages3D, STEP)
  • 3D model files: 78d15l-tn3-r-etched.step / 78d15l-tn3-r-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 78d15l-tn3-r.step / 78d15l-tn3-r.glb are the bare package body.

Provenance

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

  • Datasheet: UTC(Unisonic Tech) datasheet (8 pp, sha256 7387ebc2bfcc2697, retrieved 2026-10-28, tier: manufacturer)
  • 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