LMQ61480AASQRJRRQ1 - 8A, 36V Automotive Buck | Texas Instruments
料号： LMQ61480AASQRJRRQ1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.45 | $44.50 |
| 100 | $3.85 | $385.00 |
| 500 | $3.4 | $1,700.00 |
| 1,000 | $2.98 | $2,980.00 |
LMQ61480AASQRJRRQ1 概述
A buck converter (step-down regulator) is a switching voltage regulator that converts a higher input voltage to a lower output voltage using a high-side and low-side power stage switched by a PWM control loop. Within the power management IC hierarchy, the LMQ61480-Q1 sits in the family of point-of-load DC/DC converters feeding microcontrollers, SoCs, and ADAS processors from 12 V or 48 V automotive batteries.
Key features include the wide 3 V to 36 V operating input range with transient tolerance up to 42 V, an adjustable output from 1 V to 95% of the input voltage, and pin-selectable light-load mode for efficiency optimization. The device incorporates pin-selectable spread spectrum to reduce EMI peaks, a design intent explicitly stated by TI for the LM6x4xx-Q1 family.
The LMQ61480-Q1 belongs to a pin-compatible 6 A/8 A/10 A automotive family (LM62460-Q1, LM61480-Q1, LM61495-Q1 per the TI datasheet), allowing current-rating changes without PCB respin. Synchronous rectification integrates the power FETs, minimizing external components and improving efficiency at 8 A loads, while internal compensation and protection (current limit, thermal shutdown per family datasheet) simplify design-in.
Typical applications include automotive infotainment SoC rails, ADAS camera and radar power supplies, body electronics and gateway modules stepping 12 V down to 5 V or 3.3 V, and industrial clusters sharing the same 24 V-class rails. The 8 A rating directly supports multi-core processors and FPGA core rails.
Design-wise, keep the switch-node and input capacitor loops tight to exploit the low-EMI layout, and use the pin-selectable spread spectrum when CISPR 25 compliance is required; note the trade-off that forced-PWM or light-load selection affects standby quiescent power.
This page synthesizes distributor availability data, drop-in family alternatives, and design notes beyond what the manufacturer datasheet provides.
直接替换替代料： LMQ61480AASQRJRRQ1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： LMQ61480AASQRJRRQ1 （相同外形与封装尺寸） ——差异在于 Maximum Output Current, Output Voltage Range, Package, Transient Input Tolerance.
快速对比工具——选择替代料号进行并排对比：
LMQ61460AASQRJRRQ1
✅ 直接替换✓ 有现货
$1.96 / 个
查看数据手册 →LMQ61495AASQRJRRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LMQ61440AASQRJRRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM61440AASQRJRRQ1
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
LM61480QRPHRQ1
✅ 直接替换📋 参考替代料（不在目录中）
LMQ61480AASQRJRRQ1 最大额定值与电气特性
| 拓扑 | Synchronous Buck (step-down) Converter |
| 输入电压范围 | 3 V to 36 V |
| Transient Input Tolerance | 42 V |
| 最大输出电流 | 8 A |
| 输出电压范围 | 1 V to 95% of input voltage |
| 输出类型 | Adjustable or fixed options |
| Light-Load Mode | Pin selectable |
| Spread Spectrum | Pin selectable |
| EMI Optimization | Low-EMI design for automotive (CISPR 25 targeted per TI) |
| Qualification | AEC-Q100 automotive qualified |
| 工作温度 | -40C to +125C |
| 封装 | 16-Pin VQFN (RJR) |
| 安装类型 | Surface Mount |
| Family | LM6x4xx-Q1 pin-compatible 6 A/8 A/10 A buck family |
LMQ61480AASQRJRRQ1 16-pin vqfn (rjr) 引脚配置指南
LMQ61480AASQRJRRQ1（16-pin vqfn (rjr) 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： LMQ61480AASQRJRRQ1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
LMQ61480AASQRJRRQ1 适用于 6 应用s: ADAS Domain Controller Power, Automotive Infotainment Rails, Automotive Gateway and Body Electronics, Camera and Radar Sensor Modules, Industrial 24V Bus Point-of-Load, Battery-Powered and Communications Equipment Power.
ADAS Domain Controller Power
ADAS domain controllers and SoC modules need multi-amp core rails derived from the 12 V automotive battery. The LMQ61480AASQRJRRQ1's 8 A output directly powers SoC core or DRAM rails, while its 3 V to 36 V input with 42 V transient tolerance survives automotive load-dump events without front-end clamping. Low-EMI design and pin-selectable spread spectrum help the module meet CISPR 25 emissions requirements near sensitive radar and camera front ends. Placed after a reverse-protection stage, the converter steps 12 V to 5 V or 3.3 V with synchronous efficiency; the AEC-Q100 qualification supports ASIL-relevant supply architectures. Thermal design centers on the exposed pad and via farm under the VQFN (RJR).
推荐
Automotive Infotainment Rails
Infotainment head units combine processors, display drivers, and audio amplifiers on shared 5 V and 3.3 V rails fed from the vehicle battery. The LMQ61480AASQRJRRQ1's 8 A capability covers processor core rails during burst workloads, and its light-load pin-selectable mode preserves efficiency when the unit idles, reducing standby battery drain. The 36 V input and 42 V transient rating tolerate cranking and load-dump conditions on the always-on battery line, while spread spectrum limits radiated emissions into AM/FM tuner bands. Its compact 16-pin VQFN (RJR) footprint suits the dense layouts typical of HMI boards, and the family pin-compatibility lets one layout serve 6 A/8 A/10 A tier variants across trim levels.
推荐
Automotive Gateway and Body Electronics
Gateway modules aggregate CAN/LIN/Ethernet traffic and must supply network PHYs, microcontrollers, and memory from a permanently connected battery line. The LMQ61480AASQRJRRQ1 steps the 12 V rail down efficiently with its 3 V to 36 V input and 8 A rating, covering peak transmission bursts and cold-crank transients up to 42 V. Pin-selectable light-load mode minimizes quiescent draw during vehicle sleep states, a key parameter for key-off battery drain budgets. The low-EMI layout aids EMC compliance in the metal-dense gateway environment, and AEC-Q100 qualification aligns with body-electronics reliability requirements. Output settable from 1 V to 95% of VIN lets one regulator serve 5 V, 3.3 V, and 1.8 V PHY/core rails across the board.
推荐
Camera and Radar Sensor Modules
Automotive camera and radar modules are size-constrained and emissions-sensitive, pairing image sensors or MMICs with compact power stages. The LMQ61480AASQRJRRQ1's low-EMI optimization and pin-selectable spread spectrum directly reduce clock harmonics that degrade radar IF chains and camera imagers. Its 8 A rating, while beyond a single camera's need, supports multi-sensor aggregators and radar domain boards; the compact 16-pin VQFN (RJR) fits module-level PCBs. The 42 V transient tolerance removes the need for bulky front-end TVS sizing on the battery-fed line, and AEC-Q100 qualification plus -40C to +125C operation meet under-hood-adjacent mounting conditions. Efficiency at light load preserves the module thermal budget in sealed enclosures.
推荐
Industrial 24V Bus Point-of-Load
Industrial PLCs, motor-control boards, and drives distribute 24 V and derive 5 V or 3.3 V logic rails locally. The LMQ61480AASQRJRRQ1's 3 V to 36 V input accepts 24 V buses with margin (and 42 V transients common in industrial wiring), while its 8 A output powers FPGA core rails, embedded processors, and multi-PHY Ethernet switches. Synchronous operation maintains high efficiency at full load, easing convection-cooled enclosure design. Though automotive-qualified, AEC-Q100 parts are frequently reused in industrial designs for their robustness margin. Pin-selectable spread spectrum simplifies EN 55011-style conducted emissions compliance, and the 16-pin VQFN (RJR) footprint lets one layout cover 6 A/8 A/10 A product tiers within the same machine platform.
推荐
Battery-Powered and Communications Equipment Power
Battery-backed communications equipment, routers, and 5G small-cell hardware need efficient step-down conversion from 12 V to 48 V-class supplies. The LMQ61480AASQRJRRQ1's 8 A output supports processor and RF power-amplifier rails, its 36 V input tolerates telecom -48 V rectified inputs with transient headroom to 42 V, and pin-selectable light-load mode optimizes efficiency during low-traffic periods, extending battery runtime. Spread spectrum reduces conducted emissions into shared power infrastructure, easing system-level EMC testing. The compact VQFN (RJR) package suits high-density line-card and radio layouts, and the pin-compatible 6 A/8 A/10 A family enables a single PCB to be populated per SKU power tier without redesign, shortening variant qualification cycles.
推荐
推荐产品汇总
工程参考数据： LMQ61480AASQRJRRQ1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | LMQ61460AASQRJRRQ1 | LMQ61495AASQRJRRQ1 | LMQ61440AASQRJRRQ1 | LM61480QRPHRQ1 |
|---|---|---|---|---|---|
| Package | 16-Pin VQFN (RJR) | 16-Pin VQFN (RJR) - same | 16-Pin VQFN (RJR) - same | 16-Pin VQFN (RJR) - same | 16-Pin VQFN (RPH) |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Output Current | 8 A | 6 A | 10 A | 4 A | 8 A |
| Input Voltage Range | 3 V to 36 V (42 V transient) | 3 V to 36 V (42 V transient) | 3 V to 36 V (42 V transient) | 3 V to 36 V (42 V transient) | 3 V to 36 V |
| AEC-Q100 Qualification | Qualified (automotive -Q1) | Qualified (-Q1) | Qualified (-Q1) | Qualified (-Q1) | Qualified (-Q1) |
| Light-Load / Spread Spectrum | Pin selectable | Pin selectable | Pin selectable | Pin selectable | Pin selectable (family feature) |
| Package Fit / Drop-In | 16-Pin VQFN (RJR) baseline | Drop-in on same footprint | Drop-in on same footprint | Drop-in on same footprint | Verify footprint (RPH code) |
关键差异点
- Highest current tier fits mid-range rails （对比 LMQ61460AASQRJRRQ1)
- Lower thermal stress than the 10 A family member （对比 LMQ61495AASQRJRRQ1)
- Ultra-series density and EMI optimization （对比 LM61480QRPHRQ1)
设计说明
The LM6x4xx-Q1 family is designed for low EMI, and its performance depends heavily on layout. Keep the input capacitor-to-PVIN/PGND loop as small as possible, place the BST capacitor close to the device, and route the switch node as a short, narrow island away from sensitive analog traces. Use the exposed pad of the 16-pin VQFN (RJR) with a solid ground plane and a via array for both thermal and EMI performance. Follow the TI LM6x4xx-Q1 datasheet layout section and TI reference designs for a CISPR 25-ready starting point.
Estimated: at 12 V input, 5 V output, 8 A load, and roughly 95% peak synchronous efficiency, dissipation is on the order of 2 W. The actual junction rise depends on board copper; a conservative layout provides at least 2 oz copper with a 1-square-inch ground pour under the exposed pad. For sustained 8 A loads or higher VIN-VOUT deltas, verify junction temperature with the datasheet thermal metrics and consider the thermally enhanced dual-side-cooled LM61480T-Q1 package option for demanding automotive environments.
Do not confuse package codes when sourcing: LMQ61480AASQRJRRQ1 uses the RJR 16-pin VQFN, while LM61480QRPHRQ1 uses the RPH 16-pin VQFN - these are not footprint-identical despite similar specifications. Also set the pin-selectable light-load mode deliberately: forced operation at light load raises standby power, while skipping pulses can increase output ripple in sensitive rails. Confirm the output setting network against the 1 V to 95% of VIN adjustable range and respect the 42 V absolute transient limit - do not treat 42 V as continuous operation.
合规信息
AEC-Q100 automotive qualification is confirmed by the -Q1 designation and TI product page. RoHS/REACH status should be confirmed on the TI ordering & quality page for the exact ordering part number.
