LMQ61460AASQRJRRQ1 - 36V 6A Automotive Buck Converter
MPN： LMQ61460AASQRJRRQ1 ✓ 啟用中LMQ61460AASQRJRRQ1 概覽
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.
直接替換替代品，適用於 LMQ61460AASQRJRRQ1 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： LMQ61460AASQRJRRQ1 （相同外形與佔位） — 差異在於 Maximum Output Current, Package, Output Type, Topology, Input Voltage Range.
LM61460AASQRJRRQ1
✅ 直接替換📋 參考替代品（不在目錄中）
LMQ61480AASQRJRRQ1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM61440Q-Q1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LM5164QDDARQ1
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →LMQ61460AASQRJRRQ1 最大額定值與電氣特性
| Product Type | Automotive synchronous step-down DC-DC converter |
| 輸入電壓範圍 | 3 V to 36 V |
| Transient Input Tolerance | 42 V for 400 ms load dump |
| 最大輸出電流 | 6 A |
| 輸出電壓範圍 | 1 V to 34.2 V |
| 切換頻率 | 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 |
| 靜態電流 | 6 uA |
| Junction Temperature Range | -40 °C to +150 °C |
| 封裝 | 14-pin VQFN-HR (RJR) |
| Package Features | Wettable flanks |
| 安裝類型 | Surface mount |
| Output Polarity | Positive, adjustable |
| 輸出數量 | 1 |
| Input Protection Context | 42 V transient tolerance supports automotive load-dump protection design |
| RoHS 狀態 | Compliant |
LMQ61460AASQRJRRQ1 wettable flanks 腳位配置指南
LMQ61460AASQRJRRQ1（wettable flanks 封裝）的腳位配置。 此功率元件具有閘極、汲極與源極端子。對於非極性封裝，請參閱製造商資料表以取得確切的第 1 腳方向與佈局詳細資訊。常見應用包括電源設計、馬達驅動與負載切換。
無詳細腳位定義資料： LMQ61460AASQRJRRQ1.
請參閱 資料表 以查看完整腳位配置。
典型應用
LMQ61460AASQRJRRQ1 適用於 6 應用s: 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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 LMQ61460AASQRJRRQ1 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 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 |
主要差異化特點
- Integrated bypass capacitors improve high-frequency EMI behavior (對比LM61460AASQRJRRQ1)
- MINT architecture targets automotive EMI compliance (對比Generic 6 A buck converter)
- Automotive transient headroom (對比Lower-voltage 6 A buck converter)
設計說明
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.
合規資訊
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.
