component
UM1770Y-00
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Union Semiconductor Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-5. 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
markdownUM1770Y-00
Union Semiconductor · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-5
UM1770Y-00 from Union Semiconductor, in a SOT-89-5. 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 | FB | input | Output voltage feedback input; the output is set by an external resistor divider referenced to the 1.00V (typ) internal reference VFB, with the adjustable -00 option spanning 1.0V to 5.0V, and FB absolute maximum is -0.3 to +7.5V. |
| 2 | GND | power_in | Ground and heat sink; solder to a ground plane or large pad to maximize heat dissipation, as the package tab is electrically connected to GND. |
| 3 | SHDN | input | Shutdown control input that must not be left floating and must be tied to VIN if unused, with VIH minimum 2.0V and VIL maximum 0.4V for 2.5V ≤ VIN ≤ 6.0V and an absolute maximum of -0.3 to +7.5V. |
| 4 | VIN | power_in | Supply input for the regulator and load, specified from 2.5V to 6.0V with an absolute maximum of -0.3 to +7.5V, and locally bypassed to ground if far from other bulk capacitance. |
| 5 | VOUT | power_out | Voltage regulated output that supplies the load with up to 500mA and requires a minimum 1µF output capacitor for stability. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Union Semiconductor |
| Package | SOT-89-5 |
| 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 Range | VIN | 2.5 | 6 | V | 7 | ||
| Input Under Voltage Lockout | VUVLO | 1.8 | 2.4 | V | VIN Falling | 7 | |
| Operating Quiescent Current | IQ | 92 | 140 | μA | VIN=4.2V, IOUT=0mA | 7 | |
| Operating Quiescent Current | IQ | 250 | 300 | μA | VIN=4.2V, IOUT=500mA | 7 | |
| Shutdown Leakage Current | ISHDN | 1 | μA | 7 | |||
| Output Current | IOUT | 500 | mA | 7 | |||
| Output Voltage Accuracy | -2 | 2 | % | 1mA≤IOUT≤500mA, TA=-25°C | 7 | ||
| Dropout Voltage | ΔVDO | 220 | 320 | mV | IOUT=500mA, 2.5V≤VOUT | 7 | |
| Output Current Limit | ILIMT | 700 | mA | VIN≥2.5V | 7 | ||
| Input Low Voltage (SHDN) | VIL | 0.4 | V | 2.5V≤VIN≤6.0V | 7 | ||
| Input High Voltage (SHDN) | VIH | 2 | V | 2.5V≤VIN≤6.0V | 7 | ||
| SHDN Input Current | -1 | 1 | μA | SHDN=VIN or GND | 7 | ||
| Thermal-Shutdown Temperature | TSHDN | 160 | °C | 7 | |||
| Thermal-Shutdown Hysteresis | ΔTSHDN | 25 | °C | 7 | |||
| Line Regulation | 0.09 | %/V | VOUT+1V≤VIN≤6.0V (2.5V≤VIN), IOUT=10mA | 7 | |||
| Load Regulation | 0.2 | % | VIN=VOUT+1V (2.5V≤VIN), 1mA≤IOUT≤500mA | 7 | |||
| Startup Time | t | 40 | μs | RL=68Ω, COUT=1μF | 7 | ||
| Feedback Reference Voltage | VFB | 1 | V | 11 | |||
| Output Voltage Noise (Adjustable, VOUT=1.0V) | 60 | μVRMS | 10Hz to 100kHz, CIN=1.0μF, IOUT=100mA, Adjustable Output, VOUT=1.0V | 7 | |||
| Output Voltage Noise (Adjustable, VOUT=3.3V) | 194 | μVRMS | 10Hz to 100kHz, CIN=1.0μF, IOUT=100mA, Adjustable Output, VOUT=3.3V | 7 | |||
| Output Voltage Noise (Adjustable, VOUT=5.0V) | 305 | μVRMS | 10Hz to 100kHz, CIN=1.0μF, IOUT=100mA, Adjustable Output, VOUT=5.0V | 7 | |||
| Power Supply Ripple Rejection | PSRR | 65 | dB | VIN=VOUT+1V, IOUT=10mA, f=100Hz | 7 | ||
| Power Supply Ripple Rejection | PSRR | 60 | dB | VIN=VOUT+1V, IOUT=10mA, f=1kHz | 7 | ||
| Power Supply Ripple Rejection | PSRR | 45 | dB | VIN=VOUT+1V, IOUT=10mA, f=10kHz | 7 | ||
| Supply Voltage on VIN Pin | VIN | -0.3 | 7.5 | V | 6 | ||
| Voltage on SHDN Pin | VSHDN | -0.3 | 7.5 | V | 6 | ||
| Voltage on VOUT Pin | VOUT | -0.3 | 7.5 | V | 6 | ||
| Voltage on FB Pin | VFB | -0.3 | 7.5 | V | 6 | ||
| Operating Junction Temperature | TJ | -40 | 125 | °C | 6 | ||
| Storage Temperature Range | TSTG | -65 | 150 | °C | 6 | ||
| Lead Temperature for Soldering | TL | 300 | °C | 10 Seconds | 6 | ||
| Power Dissipation (SOT89-5) | PD | 1.5 | W | @ 25°C | 6 | ||
| Package Thermal Resistance (SOT89-5) | θJA | 66 | °C/W | 6 |
CAD (KiCad official)
- Symbol:
UM1770Y-00 - Footprint:
Package_TO_SOT_SMD:SOT-89-5 - 3D model: SOT-89-5 (KiCad packages3D, STEP)
- 3D model files:
um1770y-00-etched.step/um1770y-00-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);um1770y-00.step/um1770y-00.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Union Semiconductor datasheet (14 pp, sha256
d70c75382042de61, retrieved 2026-10-19, 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).