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NCP161ASN180T1G

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onsemi Linear Voltage Regulators (LDO), SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentpower management icsncp161asn180t1gfactory-2.0.0extractor-text
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Contents

README

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NCP161ASN180T1G

onsemi · Linear Voltage Regulators (LDO) · SOT-23-5L

NCP161ASN180T1G from onsemi, in a SOT-23-5L. 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 voltage supply pin, operating over 1.9 V to 5.5 V with an absolute maximum of -0.3 V to 6 V.
2 GND power_in Common ground connection.
3 EN input Chip enable: applying VEN < 0.4 V disables the regulator and pulling VEN > 1.2 V enables the LDO.
4 NC unconnected Not described in the pin function table; the pin diagram labels this pin NC.
5 OUT power_out Regulated output voltage, which should be bypassed with a small 1 µF ceramic capacitor.

Key specifications

Parameter Value
Manufacturer onsemi
Package SOT-23-5L
Category Power Management ICs
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
Operating Input Voltage VIN 1.9 5.5 V 3
Operating Junction Temperature TJ -40 125 °C 3
Output Voltage Accuracy VOUT -2 2 % VIN = VOUT(NOM) + 1 V, 0 mA ≤ IOUT ≤ 450 mA 3
Load Regulation LoadReg 0.005 0.008 %/mA IOUT = 1 mA to 450 mA 3
Dropout Voltage VOUT(NOM)=1.8 V VDO 365 480 mV IOUT = 450 mA, VOUT(NOM) = 1.8 V 3
Dropout Voltage VOUT(NOM)=2.8 V VDO 260 345 mV IOUT = 450 mA, VOUT(NOM) = 2.8 V 3
Dropout Voltage VOUT(NOM)=3.0 V VDO 240 330 mV IOUT = 450 mA, VOUT(NOM) = 3.0 V 3
Dropout Voltage VOUT(NOM)=3.3 V VDO 225 305 mV IOUT = 450 mA, VOUT(NOM) = 3.3 V 3
Output Current Limit ICL 450 700 mA VOUT = 90% VOUT(NOM) 3
Short Circuit Current ISC 690 mA VOUT = 0 V 3
Quiescent Current IQ 18 23 µA IOUT = 0 mA 3
Shutdown Current IDIS 0.01 1 µA VEN ≤ 0.4 V, VIN = 4.8 V 3
EN Input Voltage H VENH 1.2 V EN Input Voltage H 3
EN Input Voltage L VENL 0.4 V EN Input Voltage L 3
EN Pull Down Current IEN 0.2 0.5 µA VEN = 4.8 V 3
Power Supply Rejection Ratio PSRR 91 dB IOUT = 20 mA, f = 100 Hz 3
Power Supply Rejection Ratio PSRR 98 dB IOUT = 20 mA, f = 1 kHz 3
Power Supply Rejection Ratio PSRR 82 dB IOUT = 20 mA, f = 10 kHz 3
Power Supply Rejection Ratio PSRR 48 dB IOUT = 20 mA, f = 100 kHz 3
Output Voltage Noise VN 14 VRMS f = 10 Hz to 100 kHz, IOUT = 1 mA 3
Output Voltage Noise VN 10 VRMS f = 10 Hz to 100 kHz, IOUT = 250 mA 3
Thermal Shutdown Threshold Rising TSDH 160 °C Temperature rising 3
Thermal Shutdown Threshold Falling TSDL 140 °C Temperature falling 3
Active Output Discharge Resistance RDIS 280 Ω VEN < 0.4 V, Version A only 3
Line Transient Undershoot TranLINE -1 mV VIN = (VOUT(NOM) + 1 V) to (VOUT(NOM) + 1.6 V) in 30 µs, IOUT = 1 mA 3
Line Transient Overshoot TranLINE 1 mV VIN = (VOUT(NOM) + 1.6 V) to (VOUT(NOM) + 1 V) in 30 µs, IOUT = 1 mA 3
Load Transient Undershoot TranLOAD -40 mV IOUT = 1 mA to 450 mA in 10 µs 3
Load Transient Overshoot TranLOAD 40 mV IOUT = 450 mA to 1 mA in 10 µs 3
Input Voltage Absolute Maximum VIN -0.3 6 V 2
Output Voltage Absolute Maximum VOUT -0.3 6 V VIN + 0.3, max 6 V 2
Chip Enable Input Voltage Absolute Maximum VCE -0.3 6 V 2
Maximum Junction Temperature TJ 150 °C 2
Storage Temperature TSTG -55 150 °C 2
ESD Capability Human Body Model ESDHBM 2000 V 2
ESD Capability Machine Model ESDMM 200 V 2
Thermal Resistance Junction-to-Air SOT23-5 RθJA 218 °C/W Measured per JEDEC board specification (Note 3) 2

CAD (KiCad official)

  • Symbol: NCP161ASN180T1G
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5L (KiCad packages3D, STEP)
  • 3D model files: ncp161asn180t1g-etched.step / ncp161asn180t1g-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ncp161asn180t1g.step / ncp161asn180t1g.glb are the bare package body.

Provenance

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

  • Datasheet: onsemi datasheet (22 pp, sha256 87f4bf1f8c4d9f5a, retrieved 2026-10-27, 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