LT8301IS5#WTRMPBF from Analog Devices, in a TSOT-23-5. 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	EN/UVLO	input	Pulling this pin below 0.2V shuts down the LT8301, its accurate 1.228V threshold can program a VIN undervoltage lockout through a resistor divider, and it should be tied directly to VIN if neither function is used.
2	GND	power_in	Ground reference pin that should be tied directly to the local ground plane.
3	RFB	input	Input for the external feedback resistor connected to the SW side of the transformer primary, where the resistor ratio to an internal 10kΩ resistor times the trimmed 1.0V reference sets the output voltage and trace area should be minimized.
4	SW	output	Drain of the 65V internal DMOS power switch, rated to 65V for transients, where trace area should be minimized to reduce EMI and voltage spikes.
5	VIN	power_in	Input supply pin that powers internal circuitry and serves as the reference for the RFB feedback circuitry over a 2.7V to 42V input range, and should be locally bypassed to ground with a capacitor.

Key specifications

Parameter	Value
Manufacturer	Analog Devices
Package	TSOT-23-5
Category	Power Management ICs
Pins	5

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
VIN Input Voltage Range	VIN	2.7		42	V		3
SW pin voltage	SW			65	V		2
VIN pin voltage	VIN			42	V		2
Current into RFB				200	µA		2
Operating Junction Temperature Range (LT8301I)		-40		125	°C	LT8301I	2
Storage Temperature Range		-65		150	°C		2
Minimum Switching Frequency	fMIN	9.4	10	10.6	kHz		3
Maximum SW Current Limit	ISW(MAX)	1.2	1.375	1.55	A	l	3
Minimum SW Current Limit	ISW(MIN)	0.22	0.29	0.36	A	l	3
RFB Regulation Current	IRFB	97.5	100	102.5	µA	l	3
EN/UVLO Enable Threshold Falling		1.204	1.228	1.248	V		3
EN/UVLO Hysteresis Current	IHYS	-0.1	0	0.1	µA	VEN/UVLO = 0.2V	3
EN/UVLO Hysteresis Current	IHYS	2.2	2.5	2.8	µA	VEN/UVLO = 1.1V	3
Thermal resistance, junction to ambient (5-lead TSOT-23)	θJA		150		°C/W		2

CAD (KiCad official)

Symbol: LT8301IS5#WTRMPBF
Footprint: Package_TO_SOT_SMD:TSOT-23-5
3D model: TSOT-23-5 (KiCad packages3D, STEP)
3D model files: lt8301is5-wtrmpbf-etched.step / lt8301is5-wtrmpbf-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lt8301is5-wtrmpbf.step / lt8301is5-wtrmpbf.glb are the bare package body.

Provenance

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

Datasheet: Analog Devices datasheet (24 pp, sha256 ccd1820493fb3148, retrieved 2026-10-30, 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

LT8301IS5#WTRMPBF

Verified LT8301IS5#WTRMPBF

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3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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