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LKP2872ST-5

Public Made by Adom

by adom

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

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LKP2872ST-5

LKWIC · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5

LKP2872ST-5 from LKWIC, in a SOT-23-5. 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 supply pin (1.8V to 15V recommended operating, ±18V absolute maximum); a 1μF to 10μF ceramic capacitor to GND is recommended.
2 GND power_in Ground pin.
3 SHDN# input Output shutdown pin that must be connected to IN, and the device will not operate if it is left floating.
4 BYP passive On fixed-output versions such as the -5, a 0.01μF ceramic capacitor between BYP and OUT reduces noise to 20μVRMS (10Hz to 100kHz), and the pin must be left floating if unused (shown as BYP/ADJ on pin 4; ADJ applies only to the adjustable version).
5 OUT power_out Regulated output pin (5V for the -5 version, up to 100mA); connect a ceramic or tantalum capacitor of at least 1μF to GND.

Key specifications

Parameter Value
Manufacturer LKWIC
Package SOT-23-5
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
Input voltage (IN/SHDN# pins), absolute maximum VIN 18 V 5
BYP pin voltage, absolute maximum 0.6 V 5
Output voltage (OUT pin), absolute maximum VOUT 18 V 5
Storage temperature, absolute maximum TSTG -65 150 ℃ 5
Junction temperature, absolute maximum Tj 150 ℃ 5
Input voltage (IN pin), recommended operating VIN 1.8 15 V 5
Operating temperature, recommended operating TA -40 125 ℃ 5
Output voltage, LKP2872ST-5 4.85 5 5.12 V 6V < VIN < 18V, 1mA < ILOAD < 100mA 6
Minimum input voltage 1.8 2.3 V ILOAD = 100mA 6
Line regulation, LKP2872ST-5 1 10 mV ILOAD = 1mA 6
Load regulation, LKP2872ST-5 25 150 mV VIN = 6V, ΔILOAD = 1mA～100mA 6
Dropout voltage 0.1 0.19 V ILOAD = 1mA 6
Dropout voltage 0.17 0.29 V ILOAD = 10mA 6
Dropout voltage 0.24 0.38 V ILOAD = 50mA 6
Dropout voltage 0.3 0.45 V ILOAD = 100mA 6
GND pin current 20 45 μA ILOAD = 0mA 6
GND pin current 55 100 μA ILOAD = 1mA 6
GND pin current 230 400 μA ILOAD = 10mA 6
GND pin current 1 2 mA ILOAD = 50mA 6
GND pin current 2.2 4 mA ILOAD = 100mA 6
Ripple rejection 55 65 dB VIN, VOUT = 1.5V (Avg), VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 50mA 6
Current limit 110 mA VIN = VOUT(NOMINAL) + 1V 或 2.3V, ΔVOUT = -5% 6
Reverse input leakage current 1 mA VIN = -12V, VOUT = 0V 6
Reverse output current, LKP2872ST-5 10 20 μA VOUT = 5V, VIN < 5V 6
Output voltage noise 20 μVRMS COUT = 10μF, CBYP = 0.01μF, ILOAD = 100mA, BW = 10Hz～100kHz 6
Current limit 200 mA VIN = 7V, VOUT = 0V 6
Junction-to-case thermal resistance (top) RθJc 50.18 °C/W 5
Junction-to-case thermal resistance (bottom) RθJc 178.92 °C/W 5

CAD (KiCad official)

  • Symbol: LKP2872ST-5
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: lkp2872st-5-etched.step / lkp2872st-5-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lkp2872st-5.step / lkp2872st-5.glb are the bare package body.

Provenance

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

  • Datasheet: LKWIC datasheet (11 pp, sha256 36bd3ee8b7e961db, retrieved 2026-10-17, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-opus-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