LMQ61460AASQRJRRQ1 - 36V 6A Automotive Buck Converter
MPN: LMQ61460AASQRJRRQ1 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.17 | $3.17 |
| 10 | $3.03 | $30.30 |
| 100 | $2.65 | $265.00 |
| 500 | $2.28 | $1,140.00 |
| 1,000 | $1.96 | $1,960.00 |
LMQ61460AASQRJRRQ1 Overview
A synchronous buck converter is a switching voltage regulator that uses integrated high-side and low-side MOSFETs with an external inductor to step a higher DC input voltage down to a lower regulated output. Within the power-management hierarchy, it combines the efficiency of a switching regulator with the compact footprint of an integrated power solution. The LMQ61460AASQRJRRQ1 supports output adjustment up to 34.2 V and continuous current up to 6 A, making it useful for 12 V and 24 V vehicle systems, industrial buses, cameras, radar modules, and infotainment equipment.
Key features include the MINT, or Mitigated Interference and Noise Technology, architecture for reduced electromagnetic interference. Integrated input bypass capacitors reduce input-loop parasitics and can shrink the external component count. Soft recovery from dropout helps prevent output overshoot when the input voltage collapses. The higher-frequency AAS option supports smaller inductors, while the device’s automotive qualification and -40 °C to +150 °C junction-temperature range support harsh operating environments.
The synchronous topology improves conversion efficiency compared with a linear regulator when the input-to-output voltage difference is substantial. Integrated high-side and low-side MOSFETs reduce external switching-stage complexity, while the integrated bypass capacitors help contain high-current switching loops. The 42 V transient tolerance eases protection design in 12 V automotive systems exposed to load-dump events, although external protection and validation remain essential.
Typical applications include automotive body electronics, ADAS camera and radar modules, 12 V and 24 V industrial point-of-load supplies, USB or infotainment front ends, and low-noise embedded power rails. In a typical buck circuit, the inductor and output capacitors are placed close to the device, while input capacitors and the exposed thermal pad are connected to adequate copper.
At 36 V input and 6 A output, thermal design is a primary concern. The VQFN-HR exposed pad should be soldered to a substantial copper pour to reduce junction temperature and improve reliability. Verify inductor saturation current, MOSFET losses, capacitor ripple-current capability, and transient response using the manufacturer’s recommended compensation and layout guidance.
This page combines verified distributor pricing, package information, pin-compatible alternatives, and practical design considerations for engineers evaluating low-EMI automotive buck converters.
Drop-in alternatives for LMQ61460AASQRJRRQ1 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with LMQ61460AASQRJRRQ1 (same form factor and footprint) — differing in Maximum Output Current, Package, Output Type, Topology, Input Voltage Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
LM61460AASQRJRRQ1
✅ Drop-In📋 Reference alternative (not in catalog)
LMQ61480AASQRJRRQ1
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.98 / Unit
View Datasheet →LM61440Q-Q1
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$2.78 / Unit
View Datasheet →LM5164QDDARQ1
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.95 / Unit
View Datasheet →LMQ61460AASQRJRRQ1 Maximum Ratings & Electrical Characteristics
| Product Type | Automotive synchronous step-down DC-DC converter |
| Input Voltage Range | 3 V to 36 V |
| Transient Input Tolerance | 42 V for 400 ms load dump |
| Maximum Output Current | 6 A |
| Output Voltage Range | 1 V to 34.2 V |
| Switching Frequency | 2.2 MHz |
| Integrated Features | Integrated high-side and low-side MOSFETs and bypass capacitors |
| EMI Technology | MINT (Mitigated Interference and Noise Technology) |
| Dropout Behavior | Soft recovery from dropout with output overshoot reduction |
| Quiescent Current | 6 uA |
| Junction Temperature Range | -40 °C to +150 °C |
| Package | 14-pin VQFN-HR (RJR) |
| Package Features | Wettable flanks |
| Mounting Type | Surface mount |
| Output Polarity | Positive, adjustable |
| Number of Outputs | 1 |
| Input Protection Context | 42 V transient tolerance supports automotive load-dump protection design |
| RoHS Status | Compliant |
LMQ61460AASQRJRRQ1 wettable flanks Pin Configuration Guide
Pin configuration for LMQ61460AASQRJRRQ1 (wettable flanks package). This power device features gate, drain, and source terminals. For non-polarized packages, refer to the manufacturer datasheet for exact pin 1 orientation and footprint details. Common applications include power supply design, motor driving, and load switching.
No detailed pinout data available for LMQ61460AASQRJRRQ1.
Refer to the datasheet for full pin configuration.
Typical Applications
LMQ61460AASQRJRRQ1 is suitable for 6 applications: Automotive Body Electronics, ADAS Camera and Radar Modules, 12 V Industrial Point-of-Load Conversion, 24 V Industrial Bus Power Rails, Automotive Infotainment and USB Power, Low-Noise Embedded Sensor Rails.
Automotive Body Electronics
The LMQ61460AASQRJRRQ1 fits 12 V automotive body-control loads that require a compact 6 A buck rail with improved EMI behavior. Its 3 V to 36 V operating input range supports normal vehicle battery transients, while the 42 V, 400 ms load-dump tolerance helps simplify the transient-protection budget. MINT architecture and integrated input bypass capacitors reduce high-current loop area and switching interference that can otherwise affect nearby sensors, CAN transceivers, or body modules. The 14-pin VQFN-HR RJR package supports dense layouts, although thermal copper and automotive qualification requirements must be addressed.
Recommended
ADAS Camera and Radar Modules
The LMQ61460AASQRJRRQ1 is suitable for powering image sensors, radar transceivers, and compute electronics from an automotive 12 V input. Its synchronous buck topology delivers up to 6 A while minimizing external switching components, and MINT technology helps reduce radiated emissions in compact electronic assemblies. The 42 V transient tolerance provides additional margin for vehicle load-dump events, while soft recovery from dropout helps prevent output overshoot when the input collapses. Place the converter close to the camera or radar supply entry and use the recommended input and output capacitors to control high-frequency current paths.
Recommended
12 V Industrial Point-of-Load Conversion
The LMQ61460AASQRJRRQ1 can convert a nominal 12 V industrial bus into regulated 5 V, 3.3 V, or other adjustable rails for embedded controllers and sensors. Its 6 A capability supports moderate loads while the synchronous architecture improves efficiency compared with a linear regulator at large voltage differentials. The 3 V to 36 V input range also gives useful margin for supply variation, and the 42 V transient capability can simplify protection design in some industrial environments. Validate conducted and radiated emissions against the applicable industrial EMC standard, and confirm that the selected inductor, output capacitors, and thermal copper support the full load.
Recommended
24 V Industrial Bus Power Rails
For nominal 24 V industrial systems, the LMQ61460AASQRJRRQ1 accepts the full 3 V to 36 V range and can regulate an adjustable output down to the required rail voltage. The 6 A synchronous stage is useful for controllers, isolated interface circuitry, and instrumentation requiring more current than a compact low-power regulator can provide. Its high 2.2 MHz switching frequency supports a compact inductor, while MINT operation and integrated bypass capacitors help contain conducted and radiated emissions. The 42 V transient rating does not replace industrial surge protection, so upstream fusing, TVS selection, isolation boundaries, and fault response should be reviewed as part of the complete power-tree design.
Recommended
Automotive Infotainment and USB Power
The LMQ61460AASQRJRRQ1 is useful for local 5 V or 3.3 V generation in infotainment, connectivity, and USB power modules connected to a 12 V vehicle bus. Its integrated high-side and low-side MOSFETs reduce board area, and the integrated bypass capacitors help reduce the input-loop impedance responsible for much of the converter’s radiated emissions. The 6 A rating can power multiple downstream loads, but actual USB current limits and inrush requirements still determine the usable output. MINT operation is especially helpful in compact modules where switching node traces and connectors can radiate into nearby radio or display circuitry.
Recommended
Low-Noise Embedded Sensor Rails
The LMQ61460AASQRJRRQ1 can provide efficient, adjustable low-noise rails for sensors, analog front ends, and embedded compute in automotive or industrial systems. Compared with a linear regulator, the synchronous topology avoids dissipating the full VIN-to-VOUT difference as heat, which is important when converting 12 V or 24 V down to 3.3 V or 5 V. Low-EMI MINT operation and integrated input bypass capacitors reduce switching disturbances reaching sensitive analog sections. Post-regulation filtering may still be required when extremely low ripple or noise is specified, and the converter’s switching node should be kept away from precision sensor inputs.
Recommended
Recommended Products Summary
Engineering reference data for LMQ61460AASQRJRRQ1 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LM61460AASQRJRRQ1 | LMQ61480AASQRJRRQ1 | LM61440Q-Q1 | LM5164QDDARQ1 |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-HR-14 (RJR) | VQFN-HR-14 (RJR) | VQFN-HR-14 (RJR) | VQFN-HR-14 (RJR) | QFN-14; exact RJR footprint compatibility requires verification |
Key Differentiators
- Integrated bypass capacitors improve high-frequency EMI behavior (vs LM61460AASQRJRRQ1)
- MINT architecture targets automotive EMI compliance (vs Generic 6 A buck converter)
- Automotive transient headroom (vs Lower-voltage 6 A buck converter)
Design Notes
Use the Texas Instruments RJR recommended land pattern and keep the VIN, GND, and switching-node connections compact. Place input bypass capacitors immediately across the device input pins, and route the high-current loop through the shortest possible path to the inductor. The LMQ61460 integrated bypass capacitors reduce external input-loop area, but external ceramic capacitance may still be required for ripple and transient performance.
Treat the VQFN-HR exposed pad as the primary thermal path. Solder it to a continuous copper pour with multiple thermal vias where space permits. Estimated at VIN = 36 V, VOUT = 5 V, and IOUT = 6 A, the ideal pass-device dissipation from the voltage difference alone is approximately 186 W before accounting for converter efficiency and topology losses; actual converter losses must be calculated from the datasheet parameters and validated with thermal measurement.
MINT technology and integrated input bypass capacitors reduce switching interference, but EMI still depends on layout. Keep the switch node away from sensitive analog traces, minimize the high-current loop, use a continuous ground plane, and place input filtering close to the power entry. Validate radiated and conducted emissions at the final cable, connector, enclosure, and load conditions because board-level EMI performance is system dependent.
Do not treat the 42 V, 400 ms transient tolerance as permission to omit upstream automotive surge protection. Confirm that the input TVS, fuse, reverse-battery structure, and filtering can handle the complete vehicle transient waveform. Also verify inductor saturation current, output-capacitor ripple current, feedback resistor accuracy, compensation values, and startup behavior against the manufacturer recommendations before enabling 6 A operation.
Compliance Information
RoHS compliance is shown in the verified distributor listing. The LMQ61460-Q1 family is automotive-focused, but individual certification documents and REACH, lead-free, halogen-free, and conflict-minerals declarations were not provided in the verified data.
