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PJ54M33SQ

Public Made by Adom

by adom

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

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Datasheet

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Contents

README

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PJ54M33SQ

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

PJ54M33SQ from PJSEMI, 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 for the regulator; the datasheet requires wide copper traces for both VIN and GND and says the output capacitor must sit as close as possible to the VOUT and GND pins.
2 VIN power_in Power input with a stated operating supply range of 3 to 45 V and an absolute maximum VIN-to-GND voltage of -0.3 to +55 V.
3 VOUT power_out Regulated output with a maximum output current of 350 mA; a ceramic output capacitor of at least 10 µF (X7R or X5R) is required for stability and should be placed close to VOUT and GND.

Key specifications

Parameter Value
Manufacturer PJSEMI
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 45 V 8
Output Voltage Accuracy ∆VOUT -2 2 % VIN=12V, IOUT=10mA 8
Maximum Output Current IOUT_Max 300 350 mA 8
EN Input Threshold Logic Low VIL 0.4 V 8
EN Input Threshold Logic High VIH 1 V 8
VIN to GND Voltage -0.3 55 V 7
VOUT to GND Voltage -0.3 6 V 7
VOUT to VIN Voltage -55 0.3 V 7
EN to GND Voltage -0.3 55 V 7
Power Dissipation (SOT-89) 920 mW SOT-89 package 7
Supply Voltage 3 45 V 7
Maximum Output Current 350 mA 7
Operating Ambient Temperature -40 85 °C 7
Junction Temperature 150 °C 7
Storage Temperature Range -40 150 °C 7
Quiescent Current IQ 2.1 μA VIN=12V, IOUT=0mA 8
Dropout Voltage VDROP 35 mV VIN=VOUTNOM-0.1V, IOUT=10mA 8
Dropout Voltage VDROP 350 mV VIN=VOUTNOM-0.1V, IOUT=100mA 8
Line Regulation ∆VLINE 0.01 %/V VOUTNOM+0.5V≤VIN≤40V, IOUT=1mA 8
Load Regulation ∆VLOAD 0.02 %/mA VIN=12V, 1mA<IOUT<100mA 8
Current Limit ILIM 500 mA 8
Output Noise Voltage VN 110 μVRMS 10Hz~100KHz, COUT=1μF, VOUT=3V 8
Power Supply Rejection Ratio PSRR 85 dB VIN=12V,IOUT=10mA, f=1KHz,VOUT=3.3V 8
Thermal Shutdown Temperature TSHDN 150 °C Shutdown, Temp increasing 8
Thermal Reset Temperature TSHDN 140 °C Reset, Temp decreasing 8
Thermal Resistance, Junction-to-Ambient 135 °C/W SOT-89 package 7

CAD (KiCad official)

  • Symbol: PJ54M33SQ
  • Footprint: Package_TO_SOT_SMD:SOT-89-3
  • 3D model: SOT-89 (KiCad packages3D, STEP)
  • 3D model files: pj54m33sq-etched.step / pj54m33sq-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); pj54m33sq.step / pj54m33sq.glb are the bare package body.

Provenance

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

  • Datasheet: PJSEMI datasheet (25 pp, sha256 494f5a1224bd9a3b, 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