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MST5A50BTS-C

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MST Voltage Regulators - Linear, Low Drop Out (LDO) Regulators, SOT-89-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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MST5A50BTS-C

MST · Voltage Regulators - Linear, Low Drop Out (LDO) Regulators · SOT-89-3

MST5A50BTS-C from MST, in a SOT-89-3. 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 VOUT power_out Regulated output pin for the fixed 3.3 V or 5.0 V output (±2%), rated for up to 100 mA, with VOUT to GND limited to -0.3 V to 7 V.
2 GND power_in Ground pin, to which the input and output capacitors return; wide copper traces are required for both VIN and GND in the PCB layout.
3 VIN power_in Input pin with an operating range of 4 V to 100 V and a VIN to GND absolute maximum of -0.3 V to 115 V, decoupled with a 1 µF ceramic capacitor placed close to the device (add R1 >1 Ω at the input when VIN ≥ 48 V).

Key specifications

Parameter Value
Manufacturer MST
Package SOT-89-3
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
Output Voltage Tolerance (fixed 3.3V and 5.0V options) -2 2 % 1
Operating input voltage VIN 4 100 V 4
Absolute max: VIN to GND -0.3 115 V 3
Absolute max: VOUT to GND -0.3 7 V 3
Absolute max: VIN to VOUT -0.3 110 V 3
Operating temperature range -40 125 ℃ 3
Storage temperature -40 150 ℃ 3
ESD Human Body Model (HBM) VESD 4 KV 3
ESD Charged Device Model (CDM) VESD 200 V 3
Power dissipation, SOT89 900 mW 3
Recommended minimum output capacitance (ceramic, X5R or X7R) COUT 1 μF ceramic capacitor recommended, temperature characteristic X5R or X7R 5
Recommended input capacitance (ceramic) CIN 1 μF ceramic capacitor recommended between VIN and GND; may be increased without limit 5
Junction temperature during normal operation TJ 150 °C during normal operation 6
Quiescent current IGND 4.5 uA VIN=12V, No load 4
Output current IOUT_MAX 100 mA VIN=VOUTNOM+1V 4
Dropout voltage at 10mA VDROP 120 mV IOUT=10mA , VIN=VOUTNOM-0.1V 4
Dropout voltage at 100mA VDROP 830 mV IOUT=100mA , VIN=VOUTNOM-0.1V 4
Load regulation ΔVOUT/ΔIOUT 0.1 mV/mA VIN=7V, 1mA≤IOUT≤100mA 4
Line regulation ΔVOUT/ΔVIN 0.1 mV/V IOUT=1mA, 6V≤VIN≤1000V 4
Current limit ILIMIT 240 mA 4
Short circuit current ISHORT 80 mA VIN=12V 4
Thermal shutdown temperature (shutdown) TSHDN 145 ℃ Shutdown, temperature increasing 4
Thermal shutdown temperature (reset) TSHDN 120 ℃ Reset, temperature decreasing 4
Thermal resistance, junction to ambient, SOT89 130 ℃/W 3

CAD (KiCad official)

  • Symbol: MST5A50BTS-C
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89-3 (KiCad packages3D, STEP)
  • 3D model files: mst5a50bts-c-etched.step / mst5a50bts-c-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); mst5a50bts-c.step / mst5a50bts-c.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: MST datasheet (12 pp, sha256 5778322a73bfdd9a, retrieved 2026-10-17, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF