component

UA7905CKCS

Public Made by Adom

by adom

Texas Instruments Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, TO-220. Pinout reviewed by a person against the datasheet, KiCad symbol/footprint/3D.

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UA7905CKCS

Texas Instruments · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · TO-220

UA7905CKCS from Texas Instruments, in a TO-220. 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 negative supply input voltage, operating range -7 V to -25 V for µA7905C.
2 COMMON power_in Common ground reference point and current return path.
3 OUTPUT power_out Regulated negative output voltage of -5 V nominal with maximum output current of 1.5 A.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TO-220
Category Power Management (PMIC)
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
Input voltage (µA7905) Vl -7 -25 V µA7905 2
Output current IO 1.5 A 2
Operating virtual junction temperature TJ 0 125 °C 2
Input voltage Vl -35 V 2
Operating virtual junction temperature TJ 150 °C 2
Storage temperature range Tstg -65 150 °C 2
Output voltage VO -4.8 -5 -5.2 V 25°C; IO = 5 mA to 1 A, VI = -7 V to -20 V, PD ≤ 15 W 3
Output voltage VO -4.75 -5.25 V 0°C to 125°C; IO = 5 mA to 1 A, VI = -7 V to -20 V, PD ≤ 15 W 3
Input regulation 12.5 50 mV VI = -7 V to -25 V 3
Input regulation 4 15 mV VI = -8 V to -12 V 3
Ripple rejection 54 60 dB VI = -8 V to -12 V, f = 120 Hz, 0°C to 125°C 3
Output regulation 15 100 mV IO = 5 mA to 1.5 A 3
Output regulation 5 50 mV IO = 250 mA to 750 mA 3
Temperature coefficient of output voltage -0.4 mV/°C IO = 5 mA, 0°C to 125°C 3
Output noise voltage 125 µV f = 10 Hz to 100 kHz, 25°C 3
Dropout voltage 1.1 V IO = 1 A, 25°C 3
Bias current 1.5 2 mA 25°C 3
Bias current change 0.15 0.5 mA VI = -7 V to -25 V 3
Bias current change 0.08 0.5 mA IO = 5 mA to 1 A 3
Peak output current 2.1 A 25°C 3
Thermal resistance, junction-to-ambient θJA 19 °C/W TO-220 (KCS), High K, JESD 51-5 2
Thermal resistance, junction-to-case θJC 17 °C/W TO-220 (KCS), High K, JESD 51-5 2
Thermal resistance, junction-to-pad θJP 3 °C/W TO-220 (KCS), High K, JESD 51-5 2

CAD (KiCad official)

  • Symbol: UA7905CKCS
  • Footprint: Package_TO_SOT_THT:TO-220-3_Vertical
  • 3D model: TO-220 (KiCad packages3D, STEP)
  • 3D model files: ua7905ckcs-etched.step / ua7905ckcs-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ua7905ckcs.step / ua7905ckcs.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (14 pp, sha256 b9268cb2f137296a, retrieved 2026-10-22, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF