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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

NCP1117IST50T3G

onsemi · Linear Voltage Regulators (LDO) · SOT-223

NCP1117IST50T3G from onsemi, in a SOT-223. 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	GND	power_in	Ground reference pin (listed as Adjust/Ground; for the fixed 5.0 V version it is ground, with ground current of 3.0 mA to 5.0 mA).
2	OUTPUT	power_out	Regulated 5.0 V output, over 1.0 A capable, needing an output capacitor of at least 4.7 µF with ESR of 33 mΩ (typ) to 2.2 Ω for stability; the heatsink tab is connected to this pin.
3	INPUT	power_in	Unregulated input supply, operates up to 20 V maximum input voltage.

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	SOT-223
Category	Power Supply Chip
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, 5.0 V	Vout	4.95	5	5.05	V	Vin = 7.0 V, Iout = 10 mA, TA = 25 °C	3
Output Voltage, 5.0 V over line/load	Vout	4.9		5.1	V	Vin = 6.5 V to 12 V, Iout = 0 mA to 800 mA	3
Line Regulation, 5.0 V	Regline		6	7.5	mV	Vin = 6.5 V to 15 V, Iout = 0 mA	3
Load Regulation, 5.0 V	Regload		6.7	15	mV	Iout = 0 mA to 800 mA, Vin = 6.5 V	3
Dropout Voltage	Vin-Vout		0.95	1.1	V	Measured at Vout - 100 mV, Iout = 100 mA	3
Dropout Voltage	Vin-Vout		1.01	1.15	V	Measured at Vout - 100 mV, Iout = 500 mA	3
Dropout Voltage	Vin-Vout		1.07	1.2	V	Measured at Vout - 100 mV, Iout = 800 mA	3
Output Current Limit	Iout	1000	1500	2200	mA	Vin-Vout = 5.0 V, TA = 25°C	3
Quiescent Current, 5.0 V	IQ		6	10	mA	Vin = 15 V	4
Thermal Regulation			0.01	0.1	%/W	TA = 25°C, 30 ms Pulse	4
Ripple Rejection, 5.0 V	RR	57	64		dB	Vin-Vout = 6.4 V, Iout = 500 mA, 10 Vpp 120 Hz Sinewave	4
Temperature Stability	ST		0.5		%		4
Long Term Stability	St		0.3		%	TA = 25°C, 1000 Hrs End Point Measurement	4
RMS Output Noise	N		0.003		%Vout	f = 10 Hz to 10 kHz	4
Input Voltage	Vin			20	V		2
Maximum Die Junction Temperature Range	TJ	-55		150	°C		2
Storage Temperature Range	Tstg	-65		150	°C		2
Operating Ambient Temperature Range (NCP1117I)	TA	-40		125	°C	NCP1117I	2
Thermal Resistance, Junction-to-Ambient	RθJA		160		°C/W	Case 318H (SOT-223), Minimum Size Pad	2
Thermal Resistance, Junction-to-Case	RθJC		15		°C/W	Case 318H (SOT-223)	2

CAD (KiCad official)

Symbol: NCP1117IST50T3G
Footprint: Package_TO_SOT_SMD:SOT-223-3_TabPin2
3D model: SOT-223 (KiCad packages3D, STEP)
3D model files: ncp1117ist50t3g-etched.step / ncp1117ist50t3g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp1117ist50t3g.step / ncp1117ist50t3g.glb are the bare package body.

Provenance

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

Datasheet: onsemi datasheet (19 pp, sha256 8bd6d0050aa83242, retrieved 2026-10-23, 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