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HE9116A33NR

HEERMICR · DC-DC Converters · SOT-23

HE9116A33NR from HEERMICR, in a SOT-23. 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	VOUT	power_out	Output voltage pin; the VOUT pin voltage is limited to VSS-0.3 V to VSS+8 V (absolute maximum).
2	GND	power_in	GND pin, the circuit reference (VSS) against which the VOUT, EN and LX absolute maximum ratings are specified.
3	LX	passive	External inductor connection pin; the LX pin voltage is limited to VSS-0.3 V to VSS+8 V and the LX pin current to 500 mA (absolute maximum).

Key specifications

Parameter	Value
Manufacturer	HEERMICR
Package	SOT-23
Category	Power Management (PMIC)
Pins	3

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Output Voltage	VOUT	0.98		1.02	x VOUT(S)		3
Input Voltage	VIN			7.5	V		3
Operation Start Voltage	VST1			0.9	V	IOUT=1mA	3
Input Current At No Load	ISS1		15		uA	VIN=1.8V, VOUT=3.0V	3
Current Consumption 2	ISS2		6	10	uA	VOUT=VOUT(s)+0.5V	3
Current Consumption During Shutdown	ISSS			1	uA	VEN=0V	3
Maximum Oscillation Frequency	fosc			300	KHz	VOUT=0.95xVOUT(s), measure waveform at LX pin	3
Duty Ratio1	Duty1	70	78	85	%	VOUT=0.95xVOUT(s)	3
Efficiency	EFF1	90			%		3
Shutdown Pin Input Voltage (high)	VSH	0.75			V	VOUT=0.95xVOUT(s), judge oscillation at LX pin	3
Shutdown Pin Input Voltage (low)	VSL			0.3	V	VOUT=0.95xVOUT(s), judge stop at LX pin	3
Shutdown Pin Input Current (high)	ISH	-0.1		0.1	uA	VEN=6V	3
Shutdown Pin Input Current (low)	ISL	-0.1		0.1	uA	VEN=0V	3
VOUT Pin Voltage	VOUT	-0.3		8	V	Relative to VSS (printed VSS-0.3~VSS+8)	3
EN Pin Voltage	EN	-0.3		8	V	Relative to VSS (printed VSS-0.3~VSS+8)	3
LX Pin Voltage	VLX	-0.3		8	V	Relative to VSS (printed VSS-0.3~VSS+8)	3
LX Pin Current	ILX			500	mA		3
Power Dissipation	PD			250	mW	Package SOT23	3
Operating Temperature	TOPR	-40		85	℃		3
Storage Temperature	TSTG	-40		125	℃		3
Soldering Temperature	TSOLDER			260	℃	10 s	3

CAD (KiCad official)

Symbol: HE9116A33NR
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)
3D model files: he9116a33nr-etched.step / he9116a33nr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); he9116a33nr.step / he9116a33nr.glb are the bare package body.

Provenance

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

Datasheet: HEERMICR datasheet (7 pp, sha256 2e71334f2591137e, retrieved 2026-10-17, tier: lcsc)
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