National Semiconductor LM5642MTCX/NOPB
LM5642 4.5-36V, CURRENT MODE DUA
Answer first: this page is a purchasing reference for the exact part number LM5642MTCX/NOPB from National Semiconductor. Use it to start datasheet, package, manufacturer and RFQ verification; do not treat page text as a live stock, price or lead-time promise.
Key Parameters
| Part Number | LM5642MTCX/NOPB |
|---|---|
| Manufacturer | National Semiconductor |
| Category | DC DC Switching Controllers |
| package | 28-TSSOP (0.173", 4.40mm Width) |
| series | - |
| packaging | Bulk |
| product status | Active |
| param 1 | Transistor Driver |
| param 2 | Step-Down |
| param 3 | Positive |
| param 4 | Buck |
| param 5 | 2 |
| param 6 | 2 |
| param 7 | 4.5V ~ 36V |
| param 8 | 200kHz |
| param 9 | 98.9% |
| param 10 | Yes |
| param 11 | Yes |
| param 12 | - |
| param 13 | Current Limit, Enable, Soft Start |
| param 14 | -40°C ~ 125°C (TJ) |
| param 15 | - |
| param 16 | - |
| param 17 | Surface Mount |
| param 18 | 28-TSSOP |
Parameters are provided for purchasing review. Confirm package, suffix, lifecycle status, datasheet revision and approved substitutes before ordering.
How to Verify LM5642MTCX/NOPB Before Ordering
Datasheet and parameter checks
- Confirm the full manufacturer part number, not only a shortened search keyword.
- Compare package, pinout, dimensions, voltage or rating fields, temperature range and compliance wording against the released BOM.
- Use the manufacturer datasheet or drawing for electrical and mechanical limits before approving a substitute.
RFQ fields SENICO needs
- Send exact part number, manufacturer, quantity, target delivery date, destination and required packaging.
- State whether alternates are allowed, and list any date-code, certificate, traceability or customer AVL requirement.
- Keep exact stock, factory lead time and proposed alternatives in separate quote lanes.
For LM5642MTCX/NOPB, SENICO recommends checking manufacturer marking, package, date code, requested quantity, approved vendor requirements and replacement risk before issuing a purchase order. If a supplier suggests an equivalent, record the changed fields and approval owner before comparing price.
We do not treat displayed data as a real-time stock or price commitment. The RFQ reply is the verified commercial reference.
Related buying guides: stock and lead-time verification, equivalent IC comparison, and BOM RFQ preparation.