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AP1509-3.3M

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HGSEMI DC-DC Converters, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AP1509-3.3M

HGSEMI · DC-DC Converters · SOP-8

AP1509-3.3M from HGSEMI, in a SOP-8. 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 VIN power_in Supply voltage input pin that operates from 4.5V to 42V DC and should be bypassed to GND with a suitably large capacitor to eliminate input noise.
2 OUTPUT output Power switch output pin (SW) that is the switch node supplying power to the output, with an absolute maximum switch pin voltage of -0.3 V to Vin.
3 FEEDBACK input Feedback pin (FB) that senses the output voltage through an external resistor divider and regulates it to a 1.23 V feedback threshold, with an absolute maximum pin voltage of -0.3 V to Vin.
4 ON/OFF input Enable pin where driving it low turns the device on and driving it high turns it off, with a high threshold of 1.4 V and a low threshold of 0.8 V; the datasheet states floating is the default low.
5 GND power_in Ground pin that must be laid out outside the Schottky diode to output capacitor ground path so switching current spikes do not induce voltage noise into the device.
6 GND power_in Ground pin that must be laid out outside the Schottky diode to output capacitor ground path so switching current spikes do not induce voltage noise into the device.
7 GND power_in Ground pin that must be laid out outside the Schottky diode to output capacitor ground path so switching current spikes do not induce voltage noise into the device.
8 GND power_in Ground pin that must be laid out outside the Schottky diode to output capacitor ground path so switching current spikes do not induce voltage noise into the device.

Key specifications

Parameter Value
Manufacturer HGSEMI
Package SOP-8
Category Power Management (PMIC)
Pins 8

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 operation voltage Vin 4.5 42 V 6
Output Voltage (AP1509-3.3) VOUT 3.168 3.3 3.432 V Vin = 4.75V to 42V,Iload=0.2A to 2A 5
Oscillator Frequency Fosc 127 150 173 Khz 6
Quiescent Supply Current Iq 2 10 mA VON/OFF =0V, VFB =Vin 6
Shutdown Supply Current ISTBY 80 200 uA VON/OFF=5V 6
ON/OFF Pin Input Leakage Current (high) IH 5 30 uA VON/OFF =2.5V (OFF) 6
ON/OFF Pin Input Leakage Current (low) IL 0.2 10 uA VON/OFF =0.5V (ON) 6
Output Saturation Voltage VCE 1.2 1.4 V VFB=0V, Iout=2A 6
ON/OFF Pin Threshold High (Regulator OFF) VON/OFF 1.4 V 6
ON/OFF Pin Threshold Low (Regulator ON) VON/OFF 0.8 V 6
Input Voltage Vin -0.3 42 V 5
Feedback Pin Voltage VFB -0.3 V 5
ON/OFF Pin Voltage VON/OFF -0.3 V 5
Output Switch Pin Voltage VOutput -0.3 V 5
Operating Junction Temperature TJ -40 125 ºC 5
Storage Temperature TSTG -65 150 ºC 5
Lead Temperature TLEAD 260 ºC Soldering, 10 sec 5
ESD (HBM) ESD 2000 V 5
Thermal Resistance Junction to Ambient (SOP8) RJA 100 ºC/W Junction to Ambient, No Heatsink, Free Air 5

CAD (KiCad official)

  • Symbol: AP1509-3.3M
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: ap1509-3-3m-etched.step / ap1509-3-3m-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap1509-3-3m.step / ap1509-3-3m.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (13 pp, sha256 8479d2479ebaa956, 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