Part Review and Datasheet Update

flux

2:05

Reviewing the bill of materials.

Analyzing the schematic.

Analyzing the PCB layout.

Looking for "Extract the exact manufacturer part number, manufacturer name, package/package code, pin count, package drawings, pin names and numbers, and a concise functional description for TPS543021DRLR." in tps543021.pdf?ts=1769604993373&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS543021

Looking for "Extract the complete pin table for TPS543021DRLR with pin number, pin name, and pin description/function." in tps543021.pdf?ts=1769604993373&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS543021

Looking for "Summarize the key electrical specifications for TPS543021DRLR: input voltage range, output current, switching frequency, operating temperature, and any notable package/thermal details." in tps543021.pdf?ts=1769604993373&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS543021

Analyzing package drawing requirements.

Reviewing symbol and footprint details.

I reviewed the part project and compared it to the official TI datasheet. The audit followed the standard part-project datasheet-sync workflow: verify metadata first, then compare terminal definitions and footprint pad coverage against the datasheet pin table
What I found

Metadata status

FieldCurrent / ObservedDatasheetStatus
MPNTPS543021DRLRTPS543021DRLRMatch
ManufacturerTexas InstrumentsTexas InstrumentsMatch
Datasheet URLAlready set to TI official PDFOfficial TI PDFMatch, no URL update needed
Package / caseWas SOT-5X3 (DRL) after correctionDRL, SOT-563 / SOT-5X3, 6 pins, 1.6 mm x 1.6 mmMatch
Part typeWas Buck Converter after correction4.5 V to 28 V, 3 A synchronous step-down converterMatch
Pin count66Match
DescriptionPresent, but wording said wide input voltage and 3 ADatasheet confirms 4.5 V to 28 V, 3 A synchronous buckMostly match

Key specs

SpecValue
FunctionSynchronous step-down converter
Input voltage range4.5 V to 28 V
Output currentUp to 3 A
Switching frequency400 kHz typ
Operating temperature-40 C to 150 C junction
PackageDRL / SOT-563 / SOT-5X3
Package size1.6 mm x 1.6 mm
Symbol vs datasheet pinout
The schematic symbol has all 6 required terminals, and the pin numbers match the datasheet exactly.

Pin map check

Datasheet pinProject terminalStatus
1 = VINVINMatch
2 = SWSWMatch
3 = GNDGNDMatch
4 = BOOTBOOTMatch
5 = ENENMatch
6 = FBFBMatch
Footprint vs datasheet
The footprint contains 6 pads, one for each required pin: VIN, SW, GND, BOOT, EN, FB.

Footprint audit result

CheckResult
Pad count6 / 6 correct
Pad naming coverageCorrect
Package family alignmentConsistent with DRL 6-pin package
Detailed geometry verificationNot fully provable from the current layout data alone

Mismatches and gaps

ItemFindingSeverity
Pin Type propertiesAll terminals are currently Unspecified instead of mapped from the datasheetMedium
Pin descriptionsNo per-pin description properties are populatedMedium
Package metadataPackage field was inconsistent before correctionFixed
Part type metadataNeeded normalization to Buck ConverterFixed
Footprint geometry dimensionsPad existence is correct, but exact land pattern dimensions were not exposed by the project data I can read hereReview manually if you want full package-land-pattern validation
Recommended pin typing
Based on the datasheet pin functions, these should be the terminal types:

Table

TerminalRecommended Pin TypeShort description
VINPower InInput supply
SWPower OutSwitch node
GNDGroundGround return
BOOTPower InBootstrap supply
ENInputEnable input
FBInputFeedback input
Summary
  • The official datasheet URL was already present, so no datasheet-URL update was needed.
  • The symbol is structurally correct: all 6 pins exist and match the datasheet numbering.
  • The footprint appears complete at the pad-count/name level.
  • The biggest remaining issues are metadata completeness on the terminals:
    • pin types are unset
    • pin descriptions are missing
  • I also corrected the project metadata for Package or Case Code and Part Type to match the datasheet.
If you want, I can next populate the terminal properties for VIN, SW, GND, BOOT, EN, and FB with correct pin types and short pin descriptions from the datasheet.
Fix flagged mismatches
Prioritize critical parts
Use official datasheets
Check footprint accuracy
2 days

Set Package or Case Code to "SOT-5X3 (DRL)" and Set Part Type to "Buck Converter"

0:03

Set Package or Case Code to "SOT-5X3 (DRL)"

Set Part Type to "Buck Converter"

2 days
Sign up to send
SW
Pin Number
2
BOOT
Pin Number
4
FB
Pin Number
6
EN
Pin Number
5
GND
Pin Number
3
VIN
Pin Number
1
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TPS543021DRLR

TPS543021DRLR thumbnail
Buck Switching Regulator IC Positive, Isolation Capable Adjustable 0.596V 1 Output 3A SOT-563, SOT-666 The TPS543021DRLR is a compact, integrated power regulator that converts a wide input voltage (typically from batteries or power rails) into a regulated lower output voltage with high efficiency. It includes internal power switches and control circuitry, simplifying power supply design and reducing external component count. Key Features Topology: Synchronous buck converter Input Voltage Range: ~4.5 V to 28 V Output Voltage: Adjustable (via external resistors) Output Current: Up to 3 A continuous Switching Frequency: ~500 kHz (fixed) Efficiency: High efficiency (up to ~90%+) Quiescent Current: Low, suitable for power-sensitive designs Protection Features: Overcurrent protection (OCP) Thermal shutdown Undervoltage lockout (UVLO) Package & Physical Info Package Type: SOT-563 / VSON (compact, no-lead package) Mounting: Surface Mount (SMT) Packaging: Tape & reel (DRLR suffix) #CommonPartsLibrary #IntegratedCircuit #PowerManagement #Voltage-regulator #Switching-regulator

Properties

TPS543021DRLR

Texas Instruments

Buck Converter

ti.com/lit/ds/symlink/tps543021.pdf?ts=1769604993373&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FTPS543021

IC

SOT-5X3 (DRL)

creativecommons.org/licenses/by/4.0/

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