component

7533-1

Public Made by Adom

by adom

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

componentpower management (pmic)7533-1factory-2.0.0extractor-text
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Made with KiCad 10.0 · needs KiCad 10.0 or later to open · KiCad file format 20260206
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7533-1-hero.glb 7533-1: hero GLB from the etched model (keeps the MPN mark) · Ray 14d ago
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7533-1

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

7533-1 from DOWO, in a SOT-89. 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 pin; the datasheet requires a wide copper trace for GND and places the input and output capacitors as close as possible to the device and its GND pin.
2 VIN power_in Power input accepting 3V to 36V (absolute maximum supply voltage is 40V), decoupled with a 1μF to 10μF ceramic capacitor placed as close as possible to the device.
3 VOUT power_out Regulated fixed output of 1.8V to 5.0V (variant-dependent), requiring a 1μF to 10μF output capacitor with 5mΩ to 100mΩ ESR and X7R or X5R dielectric for stability; output current is limited to about 100mA under short-circuit.

Key specifications

Parameter Value
Manufacturer DOWO
Package SOT-89
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 VIN 3 36 V 4
Output Voltage Accuracy ΔVOUT -2 2 % IOUT=1mA 4
Maximum Output Current IOUT(Max) 150 mA 4
Quiescent Current IQ 2.5 4 μA IOUT=0mA 4
Dropout Voltage VDROP 800 950 mV VOUT=3.3V; IOUT=150mA 4
Dropout Voltage VDROP 520 680 mV VOUT=3.3V; IOUT=100mA 4
Line Regulation ΔVLINE 0.2 %/V VIN=VOUT+2V to 30V; IOUT=10mA 4
Load Regulation ΔVLOAD 25 60 mV VIN=VOUT+2V; 1mA<IOUT<150mA 4
Supply Voltage VIN -0.3 40 V 3
Power Dissipation PD 600 mW 3
Thermal Resistance, Junction-to-Ambient θJA 180 °C/W 3
Operating Junction Temperature TJ -40 125 °C 3
Storage Temperature Range TSTG -65 150 °C 3
Lead Temperature (Soldering) 300 °C Soldering, 10 sec 3
ESD (HBM) 2000 V HBM mode, ESDA/JEDECJS-001-2017 3

CAD (KiCad official)

  • Symbol: 7533-1
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: 7533-1-etched.step / 7533-1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); 7533-1.step / 7533-1.glb are the bare package body.

Provenance

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

  • Datasheet: DOWO datasheet (8 pp, sha256 99387240e1617bc8, retrieved 2026-10-18, 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