LMQ61480AASQRJRRQ1 - 8A, 36V Automotive Buck | Texas Instruments
MPN: LMQ61480AASQRJRRQ1 ✓ AktifLMQ61480AASQRJRRQ1 Genel Bakış
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.
Drop-in alternatifler için LMQ61480AASQRJRRQ1 — aynı paket, pin-başına uyumlu. PCB yeniden montajı gerektiren farklı paket bileşenleri dışlanmıştır.
Bu Serideki Variantlar
Yedek parça uyumlu olan aynı serideki modeller LMQ61480AASQRJRRQ1 (aynı form faktörü ve ayağa oturma) — farklı olan Maximum Output Current, Output Voltage Range, Package, Transient Input Tolerance.
LMQ61460AASQRJRRQ1
✅ YerleştirmeFiyat için iletişime geçin
Veri Şablonunu Görüntüle →LMQ61495AASQRJRRQ1
✅ Yerleştirme ⚠️ Onaylanmamış Özellikler📋 Katalogda Olmayan Referans Alternatifi
LMQ61440AASQRJRRQ1
✅ Yerleştirme ⚠️ Onaylanmamış Özellikler📋 Katalogda Olmayan Referans Alternatifi
LM61440AASQRJRRQ1
✅ Yerleştirme ⚠️ Onaylanmamış Özellikler📋 Katalogda Olmayan Referans Alternatifi
LM61480QRPHRQ1
✅ Yerleştirme📋 Katalogda Olmayan Referans Alternatifi
LMQ61480AASQRJRRQ1 Maksimum Değerlendirmeler & Elektriksel Özellikler
| Ağ Yapısı | Synchronous Buck (step-down) Converter |
| Giriş电压范围 | 3 V to 36 V |
| Transient Input Tolerance | 42 V |
| Maksimum Çıkış Akımı | 8 A |
| Çıkış Gerilimi Aralığı | 1 V to 95% of input voltage |
| Çıkış Türü | 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 |
| İşletim Sıcaklığı | -40C to +125C |
| Paket | 16-Pin VQFN (RJR) |
| Montaj Türü | Surface Mount |
| Family | LM6x4xx-Q1 pin-compatible 6 A/8 A/10 A buck family |
LMQ61480AASQRJRRQ1 16-pin vqfn (rjr) Pin Yapısı Kılavuzu
LMQ61480AASQRJRRQ1 (16-pin vqfn (rjr) paket) için pin yapısı. Bu güç cihazı gate, drain ve kaynak terminal özelliklerlidir. Polarizasyonlu paketler için, doğru pin 1 yönlendirme ve ayak detayları için üretici veri kitapçığını referans alın. Orta uygulamalar arasında güç besleme tasarımı, motor kontrolü ve yük değiştirme bulunur.
Ayrıntılı pin çıkış verisi mevcut değil: LMQ61480AASQRJRRQ1.
Aşağıdaki veri sayfası tam pin konfigürasyonu için.
Tipik Uygulamalar
LMQ61480AASQRJRRQ1 için uygundur 6 uygulamas: 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).
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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.
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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.
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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.
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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.
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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.
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Önerilen Ürünler Özeti
Mühendislik referans verileri: LMQ61480AASQRJRRQ1 — karşılaştırma, tasarım rehberi ve uyumluluk bilgileri.
Seçim Kılavuzu
Alternatiflerle Karşılaştırma
| Parametre | Bu Ürün | 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) |
Ana Farklılayıcılar
- Highest current tier fits mid-range rails (karşılaştırma:LMQ61460AASQRJRRQ1)
- Lower thermal stress than the 10 A family member (karşılaştırma:LMQ61495AASQRJRRQ1)
- Ultra-series density and EMI optimization (karşılaştırma:LM61480QRPHRQ1)
Tasarım Notları
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.
Uyumluluk Bilgisi
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.
