Part Review and Datasheet Update

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Reviewed AP7381-33V-A against the official Diodes Incorporated datasheet and updated the project with:
https://www.diodes.com/datasheet/download/AP7381.pdf
Key findings:
  • MPN: AP7381-33V-A
  • Manufacturer: Diodes Incorporated
  • Function: wide-input 150 mA ultra-low quiescent-current LDO regulator
  • Output: fixed 3.3 V, ±2%
  • Package code: V = TO92 ammo packing
  • Status note: datasheet marks AP7381-XXV-A as not recommended for new design
  • Recommended operating VIN: 3.3 V to 40 V
  • Absolute max VIN: -0.3 V to 45 V
  • Output current / current limit: 150 mA min
  • Typical dropout at 100 mA, 3.3 V output: 1000 mV
  • Ground current: 2.5 µA typ at no load, 25 µA typ at 100 mA
  • Required external caps: CIN = 1 µF, COUT = 2.2 µF
Cross-check results:
  • Symbol pin numbering matches the TO92 datasheet pinout:
    • Pin 1 = VOUT
    • Pin 2 = GND
    • Pin 3 = VIN
  • Footprint pad pitch is 2.54 mm with three through-hole pads, consistent with TO92 ammo packing.
  • Footprint asset is labeled AP738133VA.kicad_mod, matching the part/package intent.
Flagged mismatches / issues:
  • Terminal pin types are currently Unspecified instead of VIN = power input, GND = ground, VOUT = power output.
  • Terminal pin descriptions are minimal/missing compared with the datasheet descriptions.
  • The part is marked not recommended for new design in the datasheet; consider AP7375 or another active Diodes LDO for new designs if lifecycle matters.
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AP7381-33V-A

AP7381-33V-A thumbnail
Linear Voltage Regulator IC Positive Fixed 1 Output 150mA TO-92
The AP7381 series is a positive voltage regulator IC. The AP7381 has features of wide input voltage range, high accuracy, low dropout voltage, current limit and ultra-low quiescent current which make it ideal for use in various USB and portable devices. The IC consists of a voltage reference, an error amplifier, a resistor network for setting output voltage, a current limit circuit for current protection, and a chip enable circuit. The AP7381 has 2.8V, 3.3V, 5V and 7V fixed voltage version. The AP7381 is available in space-saving SOT23, SOT89 and TO92 (Ammo Packing) packages.
 Wide Input Voltage Range: Up to 40V  Low Dropout Voltage: VDROP = 1000mV @ IOUT = 100mA @ VOUT = 3.3V  Low Ground Current  High Output Voltage Accuracy  Compatible with Low ESR Ceramic Capacitor  Excellent Line/Load Regulation  Thermal Shutdown Function  Short Current Protection Function  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3)  For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ Applications  E-meters  Battery-powered equipments  Laptops, palmtops, notebook computers  Portable information appliances
#AP7381 #LDORegulator #VoltageRegulator #PowerManagement #LinearRegulator #DiodesIncorporated #3V3Regulator #EmbeddedSystems #ElectronicsDesign #CircuitDesign #PMIC #LowPowerDesign

Properties

AP7381-33V-A

Diodes Incorporated

Linear Regulator

diodes.com/datasheet/download/AP7381.pdf

IC

creativecommons.org/licenses/by/4.0/

parametric-v1

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