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AP1501-ADJ

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HGSEMI DC-DC Converters, TO-263-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AP1501-ADJ

HGSEMI · DC-DC Converters · TO-263-5

AP1501-ADJ from HGSEMI, in a TO-263-5. 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 input that requires a DC source in the 4.5 V to 40 V range, with a large-value capacitor placed between this pin and GND to suppress supply noise.
2 OUTPUT output Power switch output pin; it is the switching node that supplies the output load.
3 GND power_in Ground pin that should be routed on the output capacitor ground path outside the Schottky diode path to keep switching-current spikes from coupling as noise.
4 FEEDBACK bidirectional Voltage feedback pin that monitors the output through an external resistor divider, with a threshold voltage of 1.23 V.
5 ON_OFF input Enable pin: a low level (below 0.8 V) turns the chip on and a high level (above 1.4 V) turns it off, and it defaults to low when floating.
6 EP passive Exposed pad (from the footprint; not named in the datasheet pin table).

Key specifications

Parameter Value
Manufacturer HGSEMI
Package TO-263-5
Category Power Management (PMIC)
Pins 6

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 regulation (ADJ version) VOUT 1.193 1.23 1.267 V VIN=4.5V40V, ILOAD=0.2A3A 4
Input operating voltage VIN 4.5 40 V 5
Standby current ISTBY 80 200 uA VON_OFF=5V 5
Quiescent operating current IQ 2 10 mA VON_OFF=0V, VFB=VIN 5
Operating frequency FOSC 127 150 173 KHz 5
Current limit IL 3.6 4.8 6.9 A VFB=0 5
ON_OFF pin threshold, high (control off) VON_OFF 1.4 V High level = control OFF 5
ON_OFF pin threshold, low (control on) VON_OFF 0.8 V Low level = control ON 5
ON_OFF pin leakage, OFF IH 5 30 uA VON_OFF=2.5V (OFF) 5
ON_OFF pin leakage, ON IL 0.2 10 uA VON_OFF=0.5V (ON) 5
Saturation voltage VCE 1.3 1.5 V VFB=0V, IOUT=3A 5
Maximum duty cycle DMAX 100 % VFB=0V 5
Input voltage VIN -0.3 45 V 3
Feedback pin voltage VFB -0.3 V Upper limit printed as VIN 3
ON_OFF pin voltage VON_OFF -0.3 V Upper limit printed as VIN 3
Power switch output pin voltage VOUT_PUT -0.3 V Upper limit printed as VIN 3
Operating junction temperature (absolute maximum range) TJ -40 125 °C Design temperature range; industrial grade, not automotive 3
Storage temperature TSTG -65 150 °C 3
Lead soldering temperature TLEAD 245 °C 10 s 3
ESD capability ESD 2000 V Human body model 3
Input voltage VIN 5 40 V 3
Operating junction temperature range TJ -40 125 °C 3
Thermal resistance, junction to ambient RJA 50 °C/W No heatsink, TO220 and TO263 packages 5

CAD (KiCad official)

  • Symbol: AP1501-ADJ
  • Footprint: Package_TO_SOT_SMD:TO-263-5_TabPin6
  • 3D model: TO-263-5 (KiCad packages3D, STEP)
  • 3D model files: ap1501-adj-etched.step / ap1501-adj-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ap1501-adj.step / ap1501-adj.glb are the bare package body.

Provenance

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

  • Datasheet: HGSEMI datasheet (11 pp, sha256 34c362dc826e84bf, retrieved 2026-10-18, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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