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LM321G-AF5-R
Public Made by Adomby adom
UTC Unisonic Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-25. 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
markdownLM321G-AF5-R
UTC Unisonic Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-25
LM321G-AF5-R from UTC Unisonic Tech, in a SOT-25. 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 | input | Non-inverting input; the common-mode input range is 0 V to V+ -1.5 V (CMRR ≥ 50 dB) and it may be driven up to +32 V without damage. |
| 2 | V- | power_in | Negative supply rail, stated in the datasheet as ground; the input common-mode range includes this ground, allowing single-supply operation. |
| 3 | -IN | input | Inverting input; the common-mode input range is 0 V to V+ -1.5 V (CMRR ≥ 50 dB) and it may be driven up to +32 V without damage. |
| 4 | OUTPUT | output | Output; short-circuit to ground is limited to approximately 40 mA independent of V+, and continuous shorts above V+ = 15 V can exceed power dissipation ratings. |
| 5 | V+ | power_in | Positive power supply; the supply voltage range is +3 V to +32 V (absolute maximum supply voltage 32 V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | UTC Unisonic Tech |
| Package | SOT-25 |
| 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 Offset Voltage | VOS | 2 | 7 | mV | (Note 3) | 4 | |
| Input Bias Current | IB | 45 | 250 | nA | (Note 4) | 4 | |
| Input Offset Current | IOS | 5 | 50 | nA | 4 | ||
| Input Common-Mode Voltage Range | VCM | 0 | V | V+=30V (Note 5); For CMRR>=50dB | 4 | ||
| Large Signal Voltage Gain | AV | 25 | 100 | V/mV | V+=15V, RL=2kΩ, VO=1.4V~11.4V | 4 | |
| Large Signal Voltage Gain | AV | 15 | V/mV | V+=15V, RL=2kΩ, VO=1.4V~11.4V | 4 | ||
| Power Supply Rejection Ratio | PSRR | 65 | 100 | dB | RS≤10kΩ, V+≤5V~30V | 4 | |
| Common Mode Rejection Ratio | CMRR | 65 | 85 | dB | RS≤10kΩ | 4 | |
| Output Swing High | VOH | 26 | V | V+=30V, RL=2kΩ | 4 | ||
| Output Swing High | VOH | 27 | 28 | V | V+=30V, RL=10kΩ | 4 | |
| Output Swing Low | VOL | 5 | 20 | mV | V+=5V, RL=10kΩ | 4 | |
| Supply Current, No Load | IS | 0.43 | 1.15 | mA | V+=5V | 4 | |
| Supply Current, No Load | IS | 0.66 | 2.85 | mA | V+=30V | 4 | |
| Output Current Sourcing | ISOURCE | 20 | 40 | mA | VID=+1V, V+=15V, VO=2V | 4 | |
| Output Current Sinking | ISINK | 10 | 20 | mA | VID=-1V, V+=15V, VO=2V | 4 | |
| Output Current Sinking | ISINK | 12 | 100 | µA | VID=-1V, V+=15V, VO=0.2V | 4 | |
| Output Short Circuit to Ground | IO | 40 | 85 | mA | V+=15V (Note 6) | 4 | |
| Supply Voltage (V+ - V−) | VCC | 32 | V | 3 | |||
| Input Voltage | VIN | -0.3 | 32 | V | 3 | ||
| Input Current | 50 | mA | VIN<−0.3V (Note 2) | 3 | |||
| Junction Temperature | TJ | 150 | °C | 3 | |||
| Operating Temperature | TOPR | -40 | 125 | C | (Note 4) | 3 | |
| Storage Temperature | TSTG | -65 | 150 | °C | 3 | ||
| Supply Voltage Range | 3 | 32 | V | Wide supply voltage range (Features) | 1 | ||
| Slew Rate | SR | 0.4 | V/µs | V+=15V, RL=2kΩ, VIN=0.5~3V, CL=100pF, Unity Gain | 4 | ||
| Gain Bandwidth Product | GBW | 1 | MHz | V+=30V, f=100kHz, VIN=10mV, RL=2kΩ, CL=100pF | 4 | ||
| Phase Margin | φm | 60 | deg | 4 | |||
| Total Harmonic Distortion | THD | 0.015 | % | f=1kHz, AV=20dB, RL=2kΩ, VO=2VPP, CL=100pF, V+=30V | 4 | ||
| Equivalent Input Noise Voltage | en | 40 | nV Hz | f=1kHz, RS=100Ω, V+=30V | 4 | ||
| Junction to Ambient Thermal Resistance | θJA | 265 | °С/W | 3 |
CAD (KiCad official)
- Symbol:
LM321G-AF5-R - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-25 (KiCad packages3D, STEP)
- 3D model files:
lm321g-af5-r-etched.step/lm321g-af5-r-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);lm321g-af5-r.step/lm321g-af5-r.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: UTC Unisonic Tech datasheet (7 pp, sha256
8b63528a75749946, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-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).