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LP2981A-33DBVR-HXY
Public Made by Adomby adom
HXY MOSFET Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-5L. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLP2981A-33DBVR-HXY
HXY MOSFET · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-5L
LP2981A-33DBVR-HXY from HXY MOSFET, 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 | VIN | power_in | Power supply input; input voltage up to 24V (absolute max 32V), with a ceramic bypass capacitor of at least 1µF recommended. |
| 2 | VSS | power_in | Ground pin; all voltages are referenced to it. |
| 3 | CE | input | Chip enable input; enable turn-on voltage is 0.7V min to 1.2V max, and VCE=0V gives shutdown with ISHD of ±1µA max. |
| 4 | NC | unconnected | No connection, leave floating. |
| 5 | VOUT | power_out | Regulated output with ±1% accuracy, 300mA typical output current, and an output capacitor of at least 1µF required. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | HXY MOSFET |
| Package | SOT-23-5L |
| 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 |
|---|---|---|---|---|---|---|---|
| Output voltage accuracy | VOUT | -1 | 1 | % | VIN=VOUT+1V, IOUT=10mA; printed VOUT0.99 to VOUT1.01 | 3 | |
| Input voltage | VIN | 24 | V | ISS=5uA | 3 | ||
| Enable turn-on voltage | VCE | 0.7 | 1.2 | V | VIN=2.2V, IOUT=1mA | 3 | |
| Line regulation | ΔVOUT | -10 | 10 | mV | VOUT+1V≤VIN≤24V, IOUT=5mA | 3 | |
| Load regulation | ΔVOUT | -50 | 50 | mV | VIN=VOUT+1V, 1mA≤IOUT≤100mA | 3 | |
| Dropout voltage | VDrop | 130 | 150 | 170 | mV | IOUT=50mA, ΔVOUT=±1%*VOUT | 3 |
| Dropout voltage | VDrop | 230 | 250 | 270 | mV | IOUT150mA, ΔVOUT=±1%*VOUT | 3 |
| Shutdown current | ISHD | -1 | 1 | uA | VIN=VOUT+1V, VCE=0V | 3 | |
| Output voltage temperature coefficient | ΔVOUT/(ΔTa*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN=VOUT+1V, IOUT=10mA, -40℃≤Ta≤85℃; typ printed ±50 | 3 |
| Maximum input supply voltage | VIN | 32 | V | 2 | |||
| Maximum output current | IOUT | 420 | mA | 2 | |||
| Power dissipation | PD | 250 | mW | 2 | |||
| Operating temperature | TOPR | -40 | 105 | °C | 2 | ||
| Storage temperature | TSTG | -40 | 125 | °C | 2 | ||
| ESD HBM | -3000 | 3000 | V | H.B.M POS/NEG | 3 | ||
| Maximum junction temperature | TJ(MAX) | 150 | °C | normal operation recommended not above 125°C | 6 | ||
| Thermal resistance junction to ambient | θJA | 500 | °C/W | SOT-23-5L | 6 | ||
| Output current | IOUT | 300 | mA | VIN=VOUT+1V | 3 | ||
| Ripple rejection | PSRR | 75 | dB | VIN=VOUT+1V, IOUT=10mA, f=100Hz | 3 | ||
| Ripple rejection | PSRR | 60 | dB | VIN=VOUT+1V, IOUT=10mA, f=1kHz | 3 | ||
| Ripple rejection | PSRR | 45 | dB | VIN=VOUT+1V, IOUT=10mA, f=10kHz | 3 | ||
| Quiescent current | ISS | 1.5 | uA | VIN=VOUT+1V | 3 | ||
| Short-circuit current | ISCP | 85 | mA | VOUT=GND | 3 | ||
| Overcurrent protection | IOCP | 400 | mA | VIN=VCE=VOUT+1V | 3 |
CAD (KiCad official)
- Symbol:
LP2981A-33DBVR-HXY - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5L (KiCad packages3D, STEP)
- 3D model files:
lp2981a-33dbvr-hxy-etched.step/lp2981a-33dbvr-hxy-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lp2981a-33dbvr-hxy.step/lp2981a-33dbvr-hxy.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: HXY MOSFET datasheet (8 pp, sha256
c5cf65589b92b1ca, retrieved 2026-10-26, 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, primaryclaude-sonnet-5-5(text), consensusclaude-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).