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RS7550-1YF3
Public Made by Adomby adom
Jiangsu RUNIC Tech Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT23-3. 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
markdownRS7550-1YF3
Jiangsu RUNIC Tech · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT23-3
RS7550-1YF3 from Jiangsu RUNIC Tech, in a SOT23-3. 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; must be connected to the ground plane for proper heat dissipation. |
| 2 | VOUT | power_out | Regulator output (5.0V fixed for RS7550-1); recommended output capacitor range is 1μF to 10μF. |
| 3 | VIN | power_in | Regulator input, up to 36V input voltage; at least 1μF supply bypass capacitor is recommended. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Jiangsu RUNIC Tech |
| Package | SOT23-3 |
| 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 |
|---|---|---|---|---|---|---|---|
| Input voltage (absolute max) | VIN | -0.3 | 40 | V | 4 | ||
| Junction temperature (absolute max) | TJ | -40 | 150 | °C | 4 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 4 | ||
| ESD HBM | V(ESD) | -4000 | 4000 | V | Human-body model (HBM) | 4 | |
| ESD MM | V(ESD) | -100 | 100 | V | Machine model (MM) | 4 | |
| Input supply voltage | VIN | 2.5 | 36 | V | 4 | ||
| Output current | IOUT | 0 | 150 | mA | 4 | ||
| Capacitor of Vout pin | COUT | 1 | 22 | μF | 4 | ||
| Operating temperature | TA | -40 | 85 | °C | 4 | ||
| Junction-to-ambient thermal resistance | RθJA | 185.6 | °C/W | SOT23-3 | 4 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 104.3 | °C/W | SOT23-3 | 4 | ||
| Junction-to-board thermal resistance | RθJB | 54.5 | °C/W | SOT23-3 | 4 | ||
| Junction-to-top characterization parameter | ψJT | 31 | °C/W | SOT23-3 | 4 | ||
| Junction-to-board characterization parameter | ψJB | 54.5 | °C/W | SOT23-3 | 4 | ||
| Input Voltage | VIN | 36 | V | VOUT = 5.0V, +25°C | 6 | ||
| Output Voltage Accuracy | -2 | 0 | 2 | % | IOUT = 10mA, +25°C | 6 | |
| Ground Pin Current | 2 | 3 | μA | No load, VIN = VOUT + 2V, +25°C | 6 | ||
| Maximum Output Current | 100 | 150 | mA | +25°C | 6 | ||
| Dropout Voltage | VDROP | 440 | 700 | mV | IOUT = 100mA, ΔVo=2%, +25°C | 6 | |
| Line Regulation | ΔVOUT/(ΔVIN×VOUT) | 0.05 | 0.2 | %/V | VIN = VOUT + 2V to 36V, IOUT = 1mA, +25°C | 6 | |
| Load Regulation | ΔVOUT | 25 | 60 | mV | VIN = VOUT+2V, IOUT = 1mA to150mA, +25°C | 6 | |
| PSRR at 217Hz | PSRR | 58 | dB | VOUT = 5.0V, IOUT = 10mA, f = 217Hz, +25°C | 6 | ||
| PSRR at 1kHz | PSRR | 40 | dB | VOUT = 5.0V, IOUT = 10mA, f = 1KHz, +25°C | 6 | ||
| Output Voltage Temperature Coefficient | ΔVOUT/(ΔTA×VOUT) | 100 | ppm/°C | IOUT = 1mA, FULL | 6 | ||
| Thermal Shutdown Temperature | TSHDN | 150 | °C | 6 |
CAD (KiCad official)
- Symbol:
RS7550-1YF3 - Footprint:
Package_TO_SOT_SMD:SOT-23-3 - 3D model: SOT23-3 (KiCad packages3D, STEP)
- 3D model files:
rs7550-1yf3-etched.step/rs7550-1yf3-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rs7550-1yf3.step/rs7550-1yf3.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Jiangsu RUNIC Tech datasheet (11 pp, sha256
818bd81e05d2139f, retrieved 2026-10-22, tier: lcsc) - 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).