component
LR8323A-T33
Public Made by Adomby adom
LR Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-23-3L. 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
markdownLR8323A-T33
LR · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-23-3L
LR8323A-T33 from LR, in a SOT-23-3L. 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 for all voltages; connect to a large ground copper area for noise immunity and heat dissipation. |
| 2 | VOUT | power_out | Regulated fixed output (3.3V for this part, ±1%) delivering 300mA typical, needs an output capacitor of at least 1uF ceramic. |
| 3 | VIN | power_in | Supply input rated up to 24V operating (32V absolute max), needs an input bypass capacitor of at least 1uF ceramic placed close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LR |
| Package | SOT-23-3L |
| 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 |
|---|---|---|---|---|---|---|---|
| Maximum input supply voltage | VIN | 32 | V | 4 | |||
| Maximum output current | IOUT | 420 | mA | 4 | |||
| Power dissipation | PD | 250 | mW | SOT23 package | 4 | ||
| Operating temperature | TOPR | -40 | 105 | ℃ | 4 | ||
| Storage temperature | TSTG | -40 | 125 | ℃ | 4 | ||
| ESD HBM | -3000 | 3000 | V | Human body model, POS/NEG | 4 | ||
| Input voltage | VIN | 24 | V | ISS=5uA | 4 | ||
| Output voltage accuracy | VOUT | -1 | 1 | % | VIN=VOUT+1V, IOUT=10mA; printed as VOUT0.99 to VOUT1.01 | 4 | |
| Enable-on voltage | VCE | 0.7 | 1.2 | V | VIN=2.2V, IOUT=1mA | 4 | |
| Line regulation | △VOUT | -10 | 10 | mV | VOUT+1V≤VIN≤24V, IOUT=5mA | 4 | |
| Load regulation | △VOUT | -50 | 50 | mV | VIN= VOUT+1V, 1mA≤IOUT≤100mA | 4 | |
| Dropout voltage at 50 mA | VDrop | 130 | 150 | 170 | mV | IOUT=50mA, △VOUT=±1%*VOUT | 4 |
| Dropout voltage at 150 mA | VDrop | 230 | 250 | 270 | mV | IOUT150mA, △VOUT=±1%*VOUT | 5 |
| Shutdown current | ISHD | -1 | 1 | uA | VIN=VOUT+1V, VCE=0V | 4 | |
| Output voltage temperature coefficient | △VOUT/(△Ta*VOUT) | -100 | 50 | 100 | ppm/℃ | VIN= VOUT+1V, IOUT=10mA, -40℃≤Ta≤85℃ | 5 |
| Maximum junction temperature | TJ | 150 | °C | 8 | |||
| Recommended maximum junction temperature | TJ | 125 | °C | 8 | |||
| Input capacitor (recommended) | CIN | 1 | μF | Ceramic, for better temperature coefficient and lower ESR | 8 | ||
| Output capacitor (recommended) | COUT | 1 | μF | Ceramic capacitor | 8 | ||
| Input and output capacitor range (layout guidance) | CIN=COUT | 1 | 10 | μF | Place close to LDO | 10 | |
| Input series resistor (layout guidance) | 10 | Ω | Approximately, at LDO input to absorb input spikes | 10 | |||
| Output current | IOUT | 300 | mA | VIN= VOUT+1V | 4 | ||
| Ripple rejection at 100 Hz | PSRR | 75 | dB | VIN= VOUT+1V, IOUT=10mA, f=100Hz | 5 | ||
| Ripple rejection at 1 kHz | PSRR | 60 | dB | VIN= VOUT+1V, IOUT=10mA, f=1kHz | 5 | ||
| Ripple rejection at 10 kHz | PSRR | 45 | dB | VIN= VOUT+1V, IOUT=10mA, f=10kHz | 5 | ||
| Quiescent current | ISS | 1.5 | uA | VIN= VOUT+1V | 5 | ||
| Short-circuit current | ISCP | 85 | mA | VOUT=GND | 5 | ||
| Overcurrent protection threshold | IOCP | 400 | mA | VIN=VCE=VOUT+1V | 5 | ||
| Junction-to-ambient thermal resistance | θJA | 500 | °C/W | SOT23-3L package | 8 |
CAD (KiCad official)
- Symbol:
LR8323A-T33 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT-23-3L (KiCad packages3D, STEP)
- 3D model files:
lr8323a-t33-etched.step/lr8323a-t33-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lr8323a-t33.step/lr8323a-t33.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LR datasheet (13 pp, sha256
224b9fdd82b426e9, retrieved 2026-10-18, 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+vision), consensusclaude-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).