VIPER17LN from STMicroelectronics, in a DIP-7. 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	GND	power_in	This pin represents the device ground and the source of the power section.
2	VDD	power_in	Supply voltage of the control section, operating range 8.5 V to 23.5 V after turn-on, which also provides the charging current of the external capacitor during start-up.
3	CONT	input	Control pin for current limit set point adjustment by an external resistor to ground and for output voltage monitoring, where a voltage exceeding 3 V shuts the IC down.
4	FB	input	Control input for duty cycle control where a voltage below 0.5 V activates burst-mode operation and a level close to 3.3 V means approaching the cycle-by-cycle over-current set point.
5	BR	input	Brownout protection input with hysteresis where a voltage below 0.45 V shuts down (not latch) the device and it can be connected to ground when not used.
7	DRAIN	passive	High voltage drain pin rated 800 V drain-to-source (ground) voltage, through which the built-in high voltage switched start-up bias current is drawn.
8	DRAIN	passive	High voltage drain pin rated 800 V drain-to-source (ground) voltage, through which the built-in high voltage switched start-up bias current is drawn.

Key specifications

Parameter	Value
Manufacturer	STMicroelectronics
Package	DIP-7
Category	Power Management (PMIC)
Pins	7

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Drain-to-source (ground) voltage	VDRAIN			800	V		6
Repetitive avalanche energy	EAV			2	mJ	limited by TJ = 150 °C	6
Repetitive avalanche current	IAR			0.6	A	limited by TJ = 150 °C	6
Pulse drain current	IDRAIN			0.7	A		6
Feedback voltage	VFB	-0.3		5.5	V		6
Brown-out input pin voltage	VBR			2	V		6
Power dissipation	PTOT			1	W	at TA < 50 °C	6
Operating junction temperature range	TJ	-40		150	°C		6
Storage temperature	TSTG	-55		150	°C		6
Thermal resistance junction pin	RthJP			40	°C/W		6
Thermal resistance junction ambient	RthJA			90	°C/W		6
Thermal resistance junction ambient	RthJA			80	°C/W	mounted on standard single side FR4 board with 200 mm2 (0.31 sq in) Cu (35 m thick)	6
Break-down voltage	VBVDSS	800			V	IDRAIN = 1 mA, VFB = GND, TJ = 25 °C	7
OFF state drain current	IOFF			60	µA	VDRAIN = max rating, VFB = GND	7
Drain-source on state resistance	RDS(on)		20	24	Ω	IDRAIN = 0.2 A, VFB = 3 V, VBR = GND, TJ = 25 °C	7
Drain-source on state resistance	RDS(on)		40	48	Ω	IDRAIN = 0.2 A, VFB = 3 V, VBR = GND, TJ = 125 °C	7
Drain-source start voltage	VDRAIN_START	60	80	100	V		7
Start up charging current	IDD_CH	-2	-3	-4	mA	VDRAIN = 120 V, VBR = GND, VFB = GND, VDD = 4 V	7
Start up charging current after fault	IDD_CH	-0.4	-0.6	-0.8	mA	VDRAIN = 120 V, VBR = GND, VFB = GND, VDD = 4 V after fault.	7
Operating voltage range	VDD	8.5		23.5	V	After turn-on	7
VDD start up threshold	VDDon	13	14	15	V	VDRAIN = 120 V, VBR = GND, VFB = GND	7
VDD under voltage shutdown threshold	VDDoff	7.5	8	8.5	V		7
VDD restart voltage threshold	VDD(RESTART)	4	4.5	5	V	VDRAIN = 120 V, VBR = GND, VFB = GND	7
Over load shut down threshold	VFB_olp	4.7	4.8	5.2	V		8
Linear dynamics upper limit	VFB_lin	3.2	3.3	3.4	V		8
Feedback sourced current	IFB	-150	-200	-280	uA	VFB = 0.3 V	8
Dynamic resistance	RFB(DYN)	14		19	kΩ	VFB < 3.3 V	8
∆VFB / ∆ID	HFB	4	9		V/A		8
Max drain current limitation	IDlim	0.38	0.4	0.42	A	VFB = 4 V, ICONT = -10 µA, TJ = 25 °C	8
Oscillator frequency VIPER17L	FOSC	54	60	66	kHz	VDD = operating voltage range, VFB = 1 V	8
Modulation depth VIPER17L	FD	-4		4	kHz	VIPER17L	8
Maximum duty cycle	DMAX	70		80	%		8
Over voltage protection threshold	VOVP	2.7	3	3.3	V		9
Brown out threshold	VBRth	0.41	0.45	0.49	V	Voltage falling	9
Current hysteresis	IBR Hyst	7	10		uA		9
Operating range	VBR	0.15		2	V		9
Brown out disable voltage	VDIS	50		150	mV		9
Thermal shutdown temperature	TSD	150		170	°C		9
VDD clamp voltage	VDDclamp		23.5		V	IDD = 20 mA	7
Operating supply current, not switching	IDD0		0.9		mA	VFB = GND, FSW = 0 kHz, VBR = GND, VDD = 10 V	7
Operating supply current, switching	IDD1		1.8		mA	VDRAIN = 120 V, FSW = 60 kHz	7
Operating supply current, with protection tripping	IDD_FAULT		400		uA		7
Operating supply current with VDD < VDD_OFF	IDD_OFF		270		uA	VDD = 7 V	7
Burst mode threshold	VFB_bm		0.5		V	Voltage falling	8
Burst mode hysteresis	VFB_bm_hys		50		mV	Voltage rising	8
Feedback sourced current	IFB		-3		uA	3.3 V < VFB < 4.8 V	8
Low level clamp voltage	VCONT_l			0.5	V	ICONT = -100 uA	8
Soft-start time	tSS		8.5		ms		8
Minimum turn ON time	TON_MIN		400		ns		8
Propagation delay	td		150		ns		8
Leading edge blanking	tLEB		300		ns		8
Peak drain current during burst mode	ID_BM		90		mA	VFB = 0.6 V	8
Modulation frequency	FM		250		Hz		8
Second over current threshold	IDMAX		0.6		A		9
Over voltage protection strobe time	TSTROBE		2.2		us		9
Voltage hysteresis above VBRth	VBR Hyst		50		mV		9
Effective (energy related) output capacitance	COSS		10		pF	VDRAIN = 0 to 640 V	7
Thermal shutdown hysteresis	THYST		30		°C		9

CAD (KiCad official)

Symbol: VIPER17LN
Footprint: Package_DIP:DIP-8-N6_W7.62mm
3D model: DIP-7 (KiCad packages3D, STEP)
3D model files: viper17ln-etched.step / viper17ln-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); viper17ln.step / viper17ln.glb are the bare package body.

Provenance

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

Datasheet: STMicroelectronics datasheet (31 pp, sha256 7fc924dd193648ca, retrieved 2026-11-05, tier: manufacturer)
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

VIPER17LN

Verified VIPER17LN

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

README