For an LM1117, LM317 or AMS1117 availability request, specify the manufacturer and complete ordering code before comparing prices. Familiar regulator names can hide differences in package, output option and electrical limits. A supplier quotation should identify the exact offered device rather than treating these names as interchangeable descriptions.
Resolve the manufacturer and output option
Start with the approved BOM and confirm whether the circuit uses a fixed-output or adjustable regulator. Record the full output-voltage option where applicable. If the board only shows a shortened marking such as an 1117 family name, use the original purchasing record and package details to establish the approved device.
The TI LM1117 product page lists both fixed and adjustable options and points to the relevant datasheet. Use the equivalent original manufacturer documentation for every proposed item. Do not apply one manufacturer’s electrical limits to a different vendor’s similarly named part without checking.
Check the circuit conditions before accepting alternatives
Record input voltage at its minimum and maximum, output current and ambient conditions. Have engineering review dropout and power dissipation with the actual package and PCB copper. The same nominal output voltage does not establish adequate headroom or continuous thermal capability.
Compare the regulator’s output capacitor requirements with the assembled board. Include capacitance, ESR and behavior across temperature. For an adjustable circuit, verify the reference and feedback arrangement. Review pin assignments and the electrical connection of tabs or thermal pads before assuming that matching package names permit direct substitution.
Make supply and acceptance terms explicit
Specify quantity, required arrival date, packing format and whether partial shipments are acceptable. Request the offered manufacturer part number, lot identification and applicable documentation. If a quotation proposes a different manufacturer, treat that as a technical change requiring approval.
For an approved alternate, retain measurements of startup, output regulation, load transients and temperature on a representative production board. Keep the accepted capacitor values and footprint revision with the substitution record. This allows purchasing to repeat a qualified order without reopening assumptions or accepting another undocumented variant.
Frequently asked questions
Are all parts called 1117 electrically identical?
No. Compare the exact manufacturer datasheets, including voltage limits, output options, stability conditions and package pinout. A shared family-style name is not a complete specification.
Can a higher-current regulator solve an overheating problem?
Not by itself. Dissipation, package thermal performance and board cooling need review. A different power architecture may be required for the operating conditions.
Send SENICO a voltage-regulator RFQ with complete ordering codes and quantities. Availability, price and delivery timing require confirmation against the exact offered material.