LTC4364-Arduino Shield

LTC4364 Arduino Uno Shield

An editable KiCad reconstruction of a board I drew during my internship, recreated from the schematic and PCB screenshots available in reference/. The original project files were unavailable. This repository documents the reconstructed design; it does not establish that the original or reconstructed board was manufactured or tested.

Open the project

Open LTC4364-Arduino-Shield.kicad_pro in KiCad 10.0 or later. The repository includes the schematic, routed two-layer PCB, BOM, the project-local Arduino header footprint, and inspection outputs. All other footprints and 3D models use the standard KiCad libraries. fp-lib-table points to Reconstruction.pretty through ${KIPRJMOD}.

Circuit reconstructed from the screenshots

• LTC4364HS in SOIC-16, with two back-to-back N-channel power MOSFETs in inferred TO-252 / DPAK packages.
• Three 5 mΩ resistors in parallel between SENSE and OUT.
• BSS123 pulls the common SHDN/UV node low under Arduino D7 control through 1 kΩ; 100 kΩ pulls that node toward VIN.
• ENOUT is connected to Arduino D2 with a 10 kΩ pull-up to the Arduino +5 V rail.
• FLT drives an LED through 1 kΩ to +5 V.
• 10 µF input bypass and 1 µF timer capacitor; two MMSZ15T1G gate zeners.
• J1: pin 1 GND, pin 2 VIN. J2: pin 1 VOUT, pin 2 GND. Pin 1 is marked by the square pad. Observe these assignments rather than assuming both terminal blocks have the same polarity order.
• Arduino +5 V is a separate logic supply. VIN is not routed to Arduino VIN or +5 V.

The screenshot's “+60V” label is retained as historical context only. It is not a verified operating rating.

Reconstruction choices and open items

FB and OV are grounded as in the reference, so no feedback-divider surge clamp or OV-input threshold is configured here. SHDN and UV share the pulled-up control node; no useful input undervoltage threshold is established by that connection. Q1 has no added gate pull-down, matching the reference; its reset/start-up behavior needs review.

The three shunts have a nominal combined resistance of about 1.67 mΩ. Applying the datasheet's typical 50 mV current-sense threshold gives about 30 A, not a supported board current rating. MOSFET safe operating area, shunt dissipation/tolerance, terminal ratings, trace and zone capacity, copper thickness, thermal behavior, capacitor voltage rating and transients have not been qualified. Select these parts and review the circuit before powering hardware. This version is a portfolio reconstruction, not a released manufacturing design; Gerbers are intentionally not presented as a qualified production release.

Checks

Checked with KiCad 10.0.4 after filling zones:

• 0 unconnected items.
• 0 schematic/PCB parity issues.
• 0 physical-layout DRC violations; 1 library warning: the CLI reports that the project-local Reconstruction library is not enabled in its current configuration. The footprint geometry is embedded in the PCB and supplied in the local library; if the editor shows this warning, add/enable Reconstruction.pretty in the project's footprint-library table before updating footprints.

The complete report is in docs/drc-report.json. These software checks do not verify electrical function or fabrication suitability. No hardware measurements are claimed.

Reference

Analog Devices LTC4364 datasheet. The supplied screenshots are kept separately in reference/ to distinguish visible source information from reconstruction assumptions.