SG3525ANG from onsemi, in a DIP-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 internal error amplifier. Common-mode input range includes the +5.1 V reference so no external divider is required. Input bias current ~1 µA typ.
2	Noninv. Input	input	Non-inverting input of the internal error amplifier. Common-mode range +1.5 V to +5.2 V. Used to compare feedback against reference or user setpoint.
3	Sync	bidirectional	Oscillator sync pin. Allows multiple SG3525A units to be slaved together or a single unit to be synchronized to an external system clock. Sync threshold 1.2-2.8 V; sync input current ~1 mA at 3.5 V.
4	OSC. Output	output	Oscillator clock output. Provides the internal clock signal (~3.5 V amplitude, 0.3-1.0 µs pulse width) for external synchronization or monitoring.
5	CT	passive	Oscillator timing capacitor connection. External CT (0.001-0.2 µF) sets oscillator charge time together with RT. Frequency range 100 Hz to 400 kHz.
6	RT	passive	Oscillator timing resistor connection. External RT (2.0-150 kΩ) sets the oscillator charging current.
7	Discharge	passive	Deadtime programming pin. A resistor RD (0-500 Ω) between CT (pin 5) and Discharge (pin 7) sets the oscillator discharge/deadtime.
8	Soft-Start	passive	Soft-start capacitor connection. An external capacitor charged by an internal ~50 µA source implements soft-start of the PWM duty cycle. Can also accept a pull-down (~100 µA) to disable outputs.
9	Compensation	output	Error amplifier output / PWM comparator input. Compensation network is tied here to shape the loop response. Also accepts a pull-down (~100 µA) to force outputs off.
10	Shutdown	input	Active-high shutdown. Positive signal immediately sets the PWM latch (fast turn-off) and enables a 150 µA sink that discharges the soft-start cap for extended shutdowns. Should not be left floating.
11	Output A	output	Totem-pole PWM output A. Sources/sinks up to ±100 mA steady state, ±400 mA peak. Alternates with Output B on successive oscillator cycles; NOR-logic low in off-state.
12	Ground	power_in	Signal and power ground return for the device.
13	VC	power_in	Collector supply for the totem-pole output drivers (Output A/B). Operating range 4.5-35 Vdc; absolute max +40 Vdc. May be tied to VCC or a separate rail suited to the gate/base drive voltage required.
14	Output B	output	Totem-pole PWM output B. Complements Output A (alternates each oscillator cycle). Sources/sinks up to ±100 mA steady state, ±400 mA peak.
15	VCC	power_in	Main IC supply. Operating range 8.0-35 Vdc; absolute max +40 Vdc. Under-voltage lockout inhibits outputs and soft-start charging when VCC is below ~7 V.
16	Vref	power_out	Internal +5.1 V reference output, trimmed to ±1%. Sources up to 20 mA of load current; short-circuit limited to ~80 mA. Bypass to ground with a small ceramic (typ 0.1 µF).

Key specifications

Parameter	Value
Manufacturer	onsemi
Package	DIP-16
Category	PMIC
Pins	16

Ordering variants

Same part, different packaging or reel option.

SG3525ANGN
SG3525ANG
SG3525ANGDW
SG3525ANGDWG
SG3525ANGDWR2
SG3525ANGDWR2G

CAD (KiCad official)

Symbol: SG3525ANG
Footprint: Package_DIP:DIP-16_W7.62mm
3D model: DIP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`sg3525ang.step`	505 KB	You want the bare part, or you mark your own boards.
`sg3525ang-etched.step`	2.7 MB	You want the part with `SG3525ANG` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 651 faces against 284 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: onsemi datasheet (10 pp, sha256 2c62cf949fb3216e, retrieved 2026-08-17, tier: manufacturer)
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