check_design_fit
Validate your component design parameters against datasheet absolute maximum ratings and recommended operating conditions. Returns PASS/FAIL/WARNING with margin percentages.
Instructions
Validate whether a component will work within your operating conditions. Compares your design parameters against the datasheet's absolute maximum ratings and recommended operating conditions. Returns PASS/FAIL/WARNING per parameter with margin percentages.
Parameter mapping by component type:
Buck/boost converters: input_voltage, output_voltage, output_current, ambient_temp
MOSFETs: supply_voltage=VDS, output_current=ID (drain current), ambient_temp
LDOs: input_voltage, output_voltage, output_current, ambient_temp
Logic ICs: supply_voltage=VCC, ambient_temp
Result semantics:
PASS: user value is more than 10% below the datasheet limit — comfortable margin.
WARNING: user value is within 10% of the limit — part will work but with thin margin for part-to-part variation, temperature drift, and transients. Consider derating.
FAIL: user value exceeds the limit — part is out of spec and will be stressed or damaged.
Behavior:
Two-tier validation. For parameters in our structured database (Vin, Iout, operating temp, etc.), returns instantly and free of LLM cost. For parameters only found in the datasheet text, falls back to an LLM read of the absolute-max and recommended-operating-conditions sections. The 'validation_method' field in the response tells you which path was used.
If the part hasn't been extracted yet and the LLM fallback is needed, this call triggers extraction (30s-2min). Returns status='extracting' if so — poll check_extraction_status and retry.
When NOT to use:
You need power dissipation or junction-temperature rise — this tool only checks nameplate limits. Pull RthJA from read_datasheet and calculate yourself.
You need SOA (safe-operating-area) curve checks for MOSFETs — use analyze_image on the SOA graph.
You're checking a passive or mechanical part with no abs-max table — there's nothing for this tool to compare against.
Example: check_design_fit('TPS54302', input_voltage=24, output_current=2.5, ambient_temp=70)
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| part_number | Yes | Specific manufacturer part number to validate. Not a value or description. | |
| ambient_temp | No | Ambient temperature TA (°C). | |
| input_voltage | No | Input voltage / VIN (V). For converters. | |
| output_current | No | Output current / IOUT (A). For MOSFETs, this is drain current ID. | |
| output_voltage | No | Output voltage / VOUT (V). For converters/LDOs. | |
| supply_voltage | No | Supply voltage / VCC / VDD (V). For MOSFETs, this is VDS (drain-source voltage). NOT used for power dissipation — compared against VDS(max) only. | |
| switching_frequency | No | Switching frequency FSW (kHz). For converters. |