UM1663S Part Verification


Verify UM1663S only
Edit only this active personal part project. No children. Confirm owner jharwinbarrozo; wrong owner stops. Exact identity+pins verified dsq_f92b801a8c56a9fadaac src_md_1ee3a1c9029e091b; geometry dsq_992a48d8861e9332f126 src_md_d5bf98fa29fc6922. Datasheet https://www.union-ic.com/upload/Datasheet/Datasheet_UM1663_Rev01.pdf . Numbered pins 1 SW passive,2 GND/PGND ground,3 FB input,4 SHDN input,5 OVP input,6 VIN power in. SOT23-6 required lands0.7x0.9mm, pitch0.95mm, row centers2.4mm. Use parametric model node (not missing simply because no model asset); nominal model is not maximum envelope.
Read symbol/pins and actual pads, check distinct pads/no overlap, number mapping/top-view pin1, geometry, body and model fit. Repair confirmed errors only, do not qualify unverified body/model dimensions. Report skipped checks explicitly. No anchor edits, duplicate creation, sharing changes. Return owner, same UID, latest version and full short-ID URL, pin/pad counts, measured geometry/model fit and check verdicts.
After fixes are committed, publish corrected part as a new version of existing part and give version identifier. If no fixes needed do not republish.
I’ll verify the owner, pins, pad geometry, and existing parametric model, and repair only confirmed errors. I’ll publish a new version only if a correction is needed.
Created a project doc

Part Verification

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Part Verification Identity and publication
  • Owner confirmed: jharwinbarrozo.
  • Existing project: /jharwinbarrozo/um1663s
  • Same part UID: d6442b9c-9392-4aac-9bc4-6bd7e3bdc0a5.
  • Latest published version: d338d030-a70d-49bc-a252-41f8f1840426 (2026-10-26).
  • No confirmed electrical or land-pattern error found. No part-definition edits, anchor edits, duplicates, sharing changes, or republishing performed. This report is the only project addition.
Pins and actual pad mapping — PASS
Six terminals and six distinct enabled top-copper pad nodes. Each pad UID exactly matches its terminal element UID. Pin numbers are unique 1–6. Terminal names and electrical types match the supplied requirements. Top-view pinout is left top-to-bottom 1 SW, 2 GND, 3 FB; ...
Verified UM1663S, owned by jharwinbarrozo: 6 pins and 6 distinct pads pass mapping, pin-1 orientation, 0.7 × 0.9 mm land size, 0.95 mm pitch, 2.4 mm row spacing, and non-overlap checks. No confirmed fixes were needed, so I did not republish; UID remains d6442b9c-9392-4aac-9bc4-6bd7e3bdc0a5, latest version d338d030-a70d-49bc-a252-41f8f1840426.
The parametric model declares 1.600 × 2.900 × 1.175 mm, but rendered model fit and graphical-symbol checks remain unverified; measured results and skipped checks are recorded in project files: Part Verification.

VIN
Pin Number
6
OVP
Pin Number
5
SW
Pin Number
1
GND/PGND
Pin Number
2
FB
Pin Number
3
SHDN
Pin Number
4
Name
Pin #
Type
Section
Pin Group
Orientation
Order
Sub-symbol
Pin Description
SW
1
Passive
Inductor and Schottky diode switch node
GND/PGND
2
Ground
FB
3
Input
Feedback voltage
SHDN
4
Input
Chip enable and PWM/pulse dimming
OVP
5
Input
Overvoltage sense
VIN
6
Power In

UM1663S

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