KA7500CDTF from onsemi, in a SO-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	IN1+	input	Non-inverting input of error amplifier 1 (EA1). Feedback sense input; common-mode range -0.3 V to VCC-2.0 V.
2	IN1-	input	Inverting input of error amplifier 1 (EA1). Typically tied to a reference divider from VREF for output voltage regulation.
3	FB/COMP	bidirectional	Feedback / compensation node. Common output of both error amplifiers and PWM comparator input. Used for loop compensation (typ. RC network to EA input).
4	DTC	input	Dead-Time Control input. Sets minimum dead time and maximum duty cycle. Threshold: 0 V for max duty (~45%), 3.0-3.3 V for zero duty. Input range 0.3-5.3 V.
5	CT	passive	Oscillator timing capacitor connection. Typical CT = 0.0047 µF to 10 µF sets ramp for oscillator (1 kHz-200 kHz operating range).
6	RT	passive	Oscillator timing resistor connection. RT sets charging current for CT; typical RT = 1.8 kΩ-500 kΩ. Ground RT and tie pin 5 to VREF for slave operation.
7	GND	power_in	Device ground reference. All internal circuit ground returns.
8	C1	output	Collector of output transistor 1. Uncommitted; supports common-emitter or emitter-follower drive. VC max 40 V, IC max 200 mA per output.
9	E1	output	Emitter of output transistor 1. Uncommitted output. Tie low for common-emitter drive; use for emitter-follower drive.
10	E2	output	Emitter of output transistor 2. Uncommitted output paired with C2.
11	C2	output	Collector of output transistor 2. Uncommitted; VC max 40 V, IC max 200 mA. Used with C1/E1 for push-pull or paralleled for single-ended operation.
12	VCC	power_in	Main device supply. Recommended 7-40 V (abs max 42 V). Typical operating current ~6 mA at VCC=15 V.
13	OC	input	Output Control. Selects operating mode: tie to GND for single-ended (parallel) output; tie to VREF for push-pull operation (outputs alternate at half oscillator frequency).
14	VREF	power_out	Trimmed 5 V ±1% bandgap reference output. Max source current 10 mA; short-circuit current limited to ~35 mA.
15	IN2-	input	Inverting input of error amplifier 2 (EA2). Can be used for a second regulation loop (e.g. current limit) or tied off if unused.
16	IN2+	input	Non-inverting input of error amplifier 2 (EA2). Second-loop sense input; common-mode range -0.3 V to VCC-2.0 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

KA7500CDTF

CAD (KiCad official)

Symbol: KA7500CDTF
Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm
3D model: SO-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ka7500cdtf.step`	217 KB	You want the bare part, or you mark your own boards.
`ka7500cdtf-etched.step`	2.3 MB	You want the part with `KA7500CDTF` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 575 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: onsemi datasheet (9 pp, sha256 8e9c49cee72bca94, 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