Alternatives to Texas Instruments LM5126AQRHBRQ1
Texas Instruments LM5126AQRHBRQ1 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 LM5126AQRHBRQ1Texas Instruments | LM51261AQRHBRQ1Texas Instruments | LM5125AQRHBRQ1Texas Instruments | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Most pin assignments match, but pins 25, 26, 27, and 28 differ to accommodate the I2C interface (SDA/SCL, nFAULT, CFG) instead of hardware-configured pins (CFG2, CFG1, CFG0, PGOOD).Housed in the identical 32-VQFN (5x5 mm) package.Provides the same core synchronous boost regulation with VOUT tracking, but adds a digital I2C interface. | Layout differences exist around the driver pins because this is a dual-phase controller (includes Phase 2 pins like HB2, HO2, LO2, SW2) instead of single-phase NC pins.Housed in the identical 32-VQFN (5x5 mm) footprint.Meets or exceeds all performance parameters; can be configured for single-phase or dual-phase operation. | ||
 AI Summary | LM5126AQRHBRQ1 by Texas Instruments: Boost Regulator Positive Output Step-Up DC-DC Controller IC 32-VQFN (5x5). | The LM51261AQRHBRQ1 belongs to the same controller family and offers identical electrical performance (42V max input, 2.2MHz switching frequency) but includes an I2C interface. It uses the same physical package, although minor board layout adjustments are required for the I2C and fault pin functions. This is an ideal alternative if digital interface configuration can be integrated.
| The LM5125AQRHBRQ1 is a dual-phase sibling in the same series, sharing the same 32-VQFN package and electrical capabilities. It can be designed to run in single-phase mode while allowing a future path to dual-phase scalability if power requirements grow. Pin reconfigurations are necessary on the phase-2 driver nodes which are otherwise non-connected on the LM5126A.
| |
| Lifecycle Status | Active | Unknown | Unknown | |
| Market Availability | In stock | Unknown | Unknown | |
| REACH | REACH | Unknown | Unknown | |
| RoHS | RoHS | Unknown | Unknown | |
| Description | Boost Regulator Positive Output Step-Up DC-DC Controller IC 32-VQFN (5x5) | The LM51261AQRHBRQ1 belongs to the same controller family and offers identical electrical performance (42V max input, 2.2MHz switching frequ | The LM5125AQRHBRQ1 is a dual-phase sibling in the same series, sharing the same 32-VQFN package and electrical capabilities. It can be desig | |
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | |
| Type | Power Management (PMIC) | Component | Component | |
| Datasheet | N/A | N/A | N/A | |
| Lead Time | 16 weeks | Unknown | Unknown | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8542.39.0070 | - | - | |
| Moisture Sensitivity Level | 2 (1 Year) | - | - | |
| Grade | Automotive | - | - | |
| Function | Step-Up | - | - | |
| Topology | Boost | - | - | |
| Clock Sync | Yes | - | - | |
| Output Type | Transistor Driver | - | - | |
| Mounting Type | Surface Mount, Wettable Flank | - | - | |
| Output Phases | 1 | - | - | |
| Qualification | AEC-Q100 | - | - |
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Frequently asked questions
Yes. The Texas Instruments LM5126AQRHBRQ1 is active and in production. The parts listed here are qualified equivalents if you need a second source or better availability.
The closest qualified second sources for the Texas Instruments LM5126AQRHBRQ1 are the LM51261AQRHBRQ1 (Texas Instruments) and the LM5125AQRHBRQ1 (Texas Instruments), out of 3 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the LM5126AQRHBRQ1 are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The LM5126AQRHBRQ1 (Texas Instruments) is a part in the Power Management (PMIC) category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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