LD7515AGL from Leadtrend Tech, in a SOT-26. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	VCC	power_in	Supply voltage pin. Operating range 4.8 V to 16 V (absolute max 20 V). UVLO ON at ~13 V, OFF at ~4 V; OVP trips at ~18 V. Requires a 0.1-0.47 uF ceramic bypass placed close to the pin.
2	GND	power_in	Device ground reference.
3	FB	input	Auxiliary winding voltage sense and Quasi-Resonant detection input. Provides primary-side feedback for CV regulation, QRD trip level ~300 mV (100 mV hysteresis) and FB under-voltage protection at ~1.0 V. Absolute max -0.3 V to 3.3 V.
4	CS	input	Current sense pin; connect to the emitter/source sense resistor to monitor the switch current. VCS max clamp ~1 V, minimum ~0.15 V; internal leading-edge blanking of ~650 ns. Absolute max -0.3 V to 3.3 V.
5	COMP	output	Error amplifier output for loop voltage compensation. Internal 2.0 V reference, gm ~85 uA/V, upper clamp ~3.0 V. Requires an external compensation capacitor (470-4700 pF). Absolute max -0.3 V to 3.3 V.
6	OUT	output	Base drive output for the external BJT power switch. Delivers up to ~60 mA base current (Ib-max), max on-time ~13 us, switching frequency up to 75 kHz. Absolute max -0.3 V to 3.3 V.

Key specifications

Parameter	Value
Manufacturer	Leadtrend Tech
Package	SOT-26
Category	PMIC
Pins	6

Ordering variants

Same part, different packaging or reel option.

LD7515AGL

CAD (KiCad official)

Symbol: LD7515AGL
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-26 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Leadtrend Tech datasheet (14 pp, sha256 a967313cbb2f125f, retrieved 2026-08-17, tier: lcsc)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF