LM51501QRUMRQ1

LM51501QRUMRQ1 is a Texas Instruments high-voltage DC-DC controller intended for automotive and industrial power applications. It’s a wide-input-range buck-boost type controller (external MOSFETs required) that can be used to implement buck, boost, or buck-boost topologies depending on the circuit you design around it.
Key features (typical):
- Wide input range and robust protection (overcurrent/short-circuit, undervoltage/overvoltage, thermal protection)
- Current-mode control with programmable switching frequency
- Soft-start and slope compensation for stable regulation
- Enable/shutdown control and fault reporting
- Programmable feedback and external-FET drive capabilities
Packaging/suffix:
- QRUMRQ1 indicates automotive-grade (Q), RoHS-compliant materials (R), and Tape-and-Reel packaging (the “Q1”/QR variants specify packaging and reel details).
Typical applications:
- Automotive power rails and pre-regulators
- Battery charging and protection circuits
- LED drivers and other wide-input DC-DC power supplies
For exact electrical specs (input range, switching frequency, current limit, efficiency) refer to the LM51501 data sheet and the packaging code notes for QRUMRQ1.

Here are typical features of TI LM51501QRUMRQ1 (power-controller with external FETs):
- Wide input range: 4.5 V to 75 V (automotive-grade range)
- Buck-boost controller for buck, boost, or buck-boost regulation
- Requires external N-channel MOSFETs (high-side and low-side)
- Peak current-mode control with slope compensation
- Programmable switching frequency via RT/resistor network
- Enable input with soft-start and UVLO
- Adjustable output voltage via feedback network
- Protections: cycle-by-cycle current limit, hiccup short-circuit protection, overvoltage, undervoltage lockout
- Thermal shutdown for robust operation
- Automotive temperature range (-40°C to 125°C)
- Packaging: QFN/tape-and-reel variant (LM51501QRUMRQ1)
Note: exact pinout, timing specs, and recommended external components are in the datasheet.

Package type: QFN (Quad Flat No-Lead), RoHS variant with exposed pad. For exact pin count and body size, refer to the LM51501 QRUMRQ1 datasheet.

- Pin count: 28 pins (QFN package)
- Function: High-voltage buck/boost switching regulator controller (PWM controller) that drives external MOSFETs to regulate output. Includes features such as enable/soft-start, current limit, and feedback control.

Manufacturer: Texas Instruments (TI).
Company type: An American multinational semiconductor company that designs and manufactures analog and embedded processing integrated circuits.

LM51501QRUMRQ1 is a wide-input, high-efficiency buck-boost DC-DC controller for automotive and industrial power management. Applications include:
- Automotive 12/24V rail regulation (ECUs, infotainment, sensors, ADAS)
- Industrial/off-line DC-DC converters with wide Vin (6–75V)
- LED lighting drivers
- Telecom and data-center power rails
- Solar/battery systems needing buck/boost regulation

LM51501QRUMRQ1 is TI’s automotive-grade, wide-input buck-boost controller. There isn’t a single drop-in equivalent. Closest cross-references by function/voltage range include:
- TI: LM51501 (non-Q1), LM5170/LM5172 (buck-boost controllers; Q1 variants)
- Analog Devices: LTC3780/LTC3856 (60 V buck-boost controllers)
- Monolithic Power Systems: MP214x/MP216x buck-boost families
Note: not pin-for-pin drops. Provide your required input/output voltages, current, and package for a precise cross-reference.