SG2525AP013TR from STMicroelectronics, in a SOIC-16. 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	INV.INPUT	input	Inverting input of the error amplifier. Common-mode input range includes the +5.1 V reference so external divider resistors are not required when regulating to VREF.
2	N.I.INPUT	input	Non-inverting input of the error amplifier. Typical input bias current 1 µA, input offset voltage 0.5 mV.
3	SYNC	bidirectional	Oscillator synchronization terminal. Allows multiple SG2525A units to be slaved together or the device to be synchronized to an external clock. Sync threshold ~2 V, sync input current ~1 mA at 3.5 V.
4	OSC.OUTPUT	output	Oscillator clock output. Provides the internal oscillator clock signal (blanking/clock pulse) for external use or synchronization of additional devices.
5	CT	passive	Oscillator timing capacitor connection. External CT to ground (0.001 µF to 0.1 µF) sets the oscillator frequency together with RT per f = 1/(CT·(0.7·RT + 3·RD)).
6	RT	passive	Oscillator timing resistor connection. External RT to ground (2 kΩ to 150 kΩ) sets the CT charging current, defining the oscillator frequency (100 Hz to 400 kHz range).
7	DISCHARGE	passive	Deadtime / discharge resistor terminal. A resistor RD (0 to 500 Ω) between CT (pin 5) and DISCHARGE sets the CT discharge time, providing adjustable deadtime between the two outputs.
8	SOFT-START	passive	Soft-start capacitor terminal. Internally source-pulled (~50 µA typical) to charge an external capacitor and ramp the PWM duty cycle from zero on start-up; also discharged during shutdown.
9	COMP	output	Error amplifier output / PWM comparator compensation node. Connect frequency compensation network here; also serves as an alternate shutdown pull-down (pulling to ground turns off the outputs).
10	SHUTDOWN	input	PWM shutdown input. A positive signal (threshold 0.6-1 V, typical 0.8 V) immediately terminates PWM output via the latch and begins discharging the soft-start capacitor (150 µA sink). Should not be left floating; tie low if unused.
11	OUTPUT A	output	Totem-pole PWM output A. Alternates with OUTPUT B at half the oscillator frequency. Capable of sourcing/sinking >200 mA (peak 400 mA), rise/fall times ~100/50 ns into 1 nF. VOH = VC − 1 V typ at 100 mA source.
12	GROUND	power_in	Signal / power ground reference for all internal circuitry and output stages.
13	VC	power_in	Collector supply for the totem-pole output driver stages. Separate from VI to allow the output drivers to be powered from a different rail (4.5 V to 35 V; absolute max 40 V). Bypass with 0.1 µF close to the pin.
14	OUTPUT B	output	Totem-pole PWM output B. Complementary alternating output to OUTPUT A (each at half the oscillator frequency). Capable of sourcing/sinking >200 mA (peak 400 mA); rise/fall ~100/50 ns into 1 nF.
15	+VI	power_in	Main IC supply voltage input (8 V to 35 V operation, absolute max 40 V). Powers the reference, oscillator, error amplifier and control logic. Typical supply current 14 mA. UVLO releases the outputs at 7 V typical.
16	VREF	power_out	Internal 5.1 V reference output (trimmed to ±1 %). Short-circuit limited to ~80 mA typical; load current 0 to 20 mA. Bypass with 0.1 µF to ground close to the pin.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	SOIC-16
Category	PMIC
Pins	16

Ordering variants

Same part, different packaging or reel option.

SG2525AP013TR
SG2525AP013TRAN

CAD (KiCad official)

Symbol: SG2525AP013TR
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SOIC-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sg2525ap013tr.step`	217 KB	You want the bare part, or you mark your own boards.
`sg2525ap013tr-etched.step`	3.3 MB	You want the part with `SG2525AP013TR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 797 faces against 267 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: STMicroelectronics datasheet (12 pp, sha256 8705894987220bb3, 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