# LT8301IS5#WTRMPBF

**Analog Devices** · DC-DC Converters · TSOT-23-5

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](https://www.analog.com/media/en/technical-documentation/data-sheets/LT8301.pdf) (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](docs/lt8301is5-wtrmpbf-datasheet.pdf)