TI AUTOMOTIVE · PART DECISION PAGE
LMR33630-Q1
3.8–36V, 3A synchronous buck converter
A 3A buck with integrated switches, compensation and power-good signaling for automotive load rails. Frequency depends on the variant; 400kHz, 1.4MHz and 2.1MHz are not an arbitrary runtime menu for every OPN.
5-second verdict
Key specifications
Orderable variants (OPNs)
The GPN is for selection; the full OPN is for ordering. These examples were observed on the verification date, not live stock. Variants may differ in package, temperature, gain/threshold and, for PMICs, NVM/sequencing. Distinguish TA from TJ in the exact datasheet.
| OPN | Package | Temperature | Note |
|---|---|---|---|
| LMR33630AQRNXRQ1 | VQFN-HR (RNX) · 12 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| LMR33630AQRNXTQ1 | VQFN-HR (RNX) · 12 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| LMR33630BQRNXRQ1 | VQFN-HR (RNX) · 12 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| LMR33630BQRNXTQ1 | VQFN-HR (RNX) · 12 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| LMR33630CQRNXRQ1 | VQFN-HR (RNX) · 12 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
| LMR33630CQRNXTQ1 | VQFN-HR (RNX) · 12 pin | -40 to +125°C (TI OPN listing; verify TA/TJ) | Verify exact OPN, temperature definition and revision; not a stock claim. |
Official ordering page: https://www.ti.com/product/LMR33630-Q1
Typical applications
FAQ
Is the highest-frequency variant always better?
Higher frequency may shrink passives but changes switching loss, minimum-on-time constraints and EMI margin. Evaluate VIN/VOUT ratio and thermal budget, not size alone.
Can it boost the voltage?
No. It is a buck. When cold-crank input approaches or falls below output, check dropout or select an appropriate buck-boost architecture.
How should I verify the LMR33630-Q1 orderable?
The page lists 6 OPN examples from official material checked on 2026-11-06. Match package, function options and temperature definitions; obtain live price/stock from TI or authorized distributors.
Sources and verification
Related selection and design checks
NuAxi is an independent semiconductor market-intelligence platform and is not affiliated with Texas Instruments. Information is for selection reference only and is not a design, certification or procurement guarantee; verify against TI's official datasheet, ordering page and terms.