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Texas Instruments LMQ61460AASQRJRRQ1
- Part No.:
- LMQ61460AASQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LMQ61460AASQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 6A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,305
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Product details
Overview
LMQ61460AASQRJRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck converter delivering up to 6A output current across a 3V–36V input range, supporting 42V load dump for 400ms. It integrates high-side and low-side MOSFETs (RDS(ON) = 41 mΩ / 21 mΩ), features MINT 2 architecture for CISPR25 Class 5 compliance, and enables soft-dropout recovery in infotainment power rails.
For engineers reviewing the LMQ61460AASQRJRRQ1 datasheet, LMQ61460AASQRJRRQ1 pinout, LMQ61460AASQRJRRQ1 application, or LMQ61460AASQRJRRQ1 equivalent, key selection considerations include its 200kHz–2.2MHz adjustable switching frequency, 7µA no-load quiescent current at 13.5VIN, integrated bypass capacitors, spread-spectrum EMI reduction, and VQFN-HR 14-pin wettable-flank package with dual VIN/PGND inputs.
Technical Context
The LMQ61460AASQRJRRQ1 implements peak-current-mode control with auto-mode frequency foldback and seamless PWM/PFM transition. Its MINT 2 architecture incorporates pseudo-random spread spectrum, adjustable SW node rise time via RBOOT, internal bypass capacitors, and parallel VIN paths to suppress common-mode EMI.
It supports functional safety system design with documented failure modes and diagnostic coverage, operates over –40°C to +150°C junction temperature, and delivers 95% efficiency at 4A/5V with 400kHz switching-while maintaining 73% efficiency at 100µA light load using Auto Mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V continuous; withstands 42 V load dump for 400 ms-enables direct connection to automotive battery without external TVS. |
| Output Current | Up to 6 A DC; supported by integrated 41 mΩ HS / 21 mΩ LS MOSFETs-eliminates need for external power switches in compact 5V/3.3V rails. |
| Switching Frequency | Adjustable 200 kHz to 2.2 MHz via RT pin or SYNC input-allows AM-band avoidance (e.g., 400 kHz or 2.1 MHz) and optimization of size vs. efficiency. |
| No-Load Quiescent Current | 7 µA typical at 13.5 VIN, 3.3 VOUT in Auto Mode-supports always-on systems like telematics with minimal battery drain. |
| EMI Performance | CISPR25 Class 5 compliant; achieved via HotRod™ VQFN-HR package, internal bypass caps, spread spectrum, and adjustable SW rise time-reduces need for shielding or ferrites. |
| Thermal Rating | AEC-Q100 Grade 1: –40°C to +150°C TJ; thermal shutdown at 158°C–180°C with 10°C hysteresis-ensures reliability in under-hood environments. |
| Feedback Accuracy | ±1% initial VFB reference (1.0 V); supports fixed 3.3 V/5 V or adjustable outputs-enables precise regulation for sensitive SoCs and displays. |
Pinout & Package
The LMQ61460AASQRJRRQ1 is housed in a 4 mm × 3.5 mm VQFN-HR (RJR) package with wettable flanks for automated optical inspection and enhanced solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS (Pin 1) | External bias supply input | Connects to regulated output voltage (≤12 V) to improve light-load efficiency; optional 0.1–1 µF capacitor to AGND enhances noise immunity. |
| VCC (Pin 2) | Internal LDO output | Supplies internal control circuitry; requires 1 µF capacitor to AGND-no external loading permitted. |
| AGND (Pin 3) | Analog ground reference | Reference point for FB and VCC; must be connected to both PGND1 and PGND2 on PCB to minimize ground bounce. |
| FB (Pin 4) | Feedback input | Senses output voltage; connects directly to fixed-output versions or feedback divider tap-critical for regulation accuracy and stability. |
| PGOOD (Pin 5) | Open-drain power-good indicator | Signals valid regulation (high) or fault (low); pull-up required; asserts low during EN deactivation or VIN < 1 V. |
| RT (Pin 6) | Frequency setting input | Resistor-to-ground (5.76 kΩ–66.5 kΩ) sets fSW from 200 kHz to 2.2 MHz-enables system-level frequency coordination. |
| EN/SYNC (Pin 7) | Enable and synchronization input | Logic-high enables operation; also accepts external clock (200 kHz–2.2 MHz) for forced PWM sync-disables PFM when synchronized. |
| VIN1 & VIN2 (Pins 8, 12) | Dual input power terminals | Parallel high-current paths reduce parasitic inductance; each requires local high-quality bypass capacitors to respective PGND pins. |
| PGND1 & PGND2 (Pins 9, 11) | Power ground terminals | Low-impedance return paths for low-side MOSFET; must be shorted together on PCB and tied to AGND at single point. |
| SW (Pin 10) | Switch node output | Drives external inductor; exhibits minimized ringing due to HotRod package and optimized layout-key for low EMI. |
| RBOOT (Pin 13) | Bootstrap rise-time control | Resistor between RBOOT and CBOOT adjusts SW node rise time (2.15 ns to 2.7 ns)-fine-tunes EMI vs. efficiency trade-off. |
| CBOOT (Pin 14) | High-side gate driver supply | Connected via 100 nF capacitor to SW; charged internally from VCC-enables robust high-side drive without external bootstrap diode. |
Key Features
| Feature | Design Value |
|---|---|
| MINT 2 EMI mitigation | Combines spread spectrum, internal bypass capacitors, parallel VIN paths, and adjustable SW rise time to meet CISPR25 Class 5 without shielding. |
| Auto-mode light-load efficiency | Reduces switching frequency under light loads to achieve 7 µA no-load current and 73% efficiency at 100 µA-ideal for always-on modules. |
| Dual-VIN/PGND architecture | Minimizes loop inductance and improves thermal distribution-enables stable 6A operation in compact 4 mm × 3.5 mm footprint. |
| Integrated power stage | 41 mΩ HS / 21 mΩ LS MOSFETs with 10.3 A high-side current limit-supports full 6A output with margin and eliminates external FETs. |
| Functional safety support | Documentation available for FMEDA and safety analysis-facilitates ISO 26262 ASIL-B system integration in ADAS and body controllers. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and USB-C PD controller in centralized head unit with strict EMI limits near AM/FM receivers. IC Role / Device Role / Timing Role: Primary 5V/3.3V synchronous buck regulator with adjustable 2.1 MHz switching to avoid AM band interference. Use Value: MINT 2 architecture achieves CISPR25 Class 5 compliance without shielded inductors or metal cans-reducing BOM cost and board area by >15%. |
Use Scenario: Supplies image sensor and ISP in front-facing ADAS camera exposed to engine bay temperatures up to +125°C ambient. IC Role / Device Role / Timing Role: High-reliability 3.3V buck converter with –40°C to +150°C TJ rating and 42V load dump tolerance. Use Value: Integrated 41 mΩ/21 mΩ MOSFETs and soft-dropout recovery maintain stable output during cold-crank transients-preventing camera reset events. |
| Automotive Cluster Display Backlight | Body Control Module (BCM) Core Rail |
|
Use Scenario: Generates 5V rail for TFT-LCD timing controller and LED backlight driver in digital instrument cluster with tight space constraints. IC Role / Device Role / Timing Role: Compact 4 mm × 3.5 mm VQFN-HR buck converter with wettable flanks for AOI-compatible assembly. Use Value: 95% efficiency at 4A/5V with 400kHz switching enables use of smaller inductors and ceramic capacitors-reducing solution height to <1.2 mm. |
Use Scenario: Provides always-on 3.3V core supply for microcontroller and CAN transceiver in BCM with 10-year battery life requirement. IC Role / Device Role / Timing Role: Ultra-low-quiescent-current buck regulator with 7 µA no-load current and programmable UVLO via EN/SYNC pin. Use Value: BIAS pin support and Auto Mode extend battery runtime in sleep mode-meeting OEM requirements for <10 µA system standby current. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMQ61460AFSQRJRRQ1 | Fixed FPWM mode (no Auto-mode frequency foldback); identical MINT 2 EMI features and pinout. | Better suited for noise-sensitive systems requiring constant-frequency operation (e.g., radar power supplies). | Select when deterministic switching frequency is mandatory and light-load efficiency is secondary. |
| LM61460QRJRRQ1 | Non-MINT variant; lacks spread spectrum, internal bypass caps, and adjustable SW rise time-CISPR25 Class 5 not guaranteed. | Lower-cost option for less stringent EMI environments (e.g., non-radio cabin modules). | Choose only if EMI testing passes without additional filtering and 42V load dump margin is sufficient. |
Compared with LMQ61460AFSQRJRRQ1, the LMQ61460AASQRJRRQ1 provides superior light-load efficiency via Auto Mode but sacrifices frequency determinism; versus LM61460QRJRRQ1, it delivers certified CISPR25 Class 5 performance and higher reliability in harsh automotive transients-justifying its use in safety-critical infotainment and ADAS rails.
Availability
LMQ61460AASQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMQ61460AASQRJRRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive-grade power management ICs with decades of AEC-Q100 qualification expertise.
The LMQ61460-Q1 product line targets high-reliability automotive DC-DC conversion, specifically engineered for EMI-sensitive infotainment, ADAS, and body electronics where small size, wide input range, and functional safety support are critical.
FAQ
What is the maximum input voltage the LMQ61460AASQRJRRQ1 can withstand during load dump events?
The LMQ61460AASQRJRRQ1 supports 42 V input for durations up to 400 ms, satisfying ISO 7637-2 Pulse 5a load dump requirements for 12 V automotive systems. This rating is validated per absolute maximum specifications and enables direct battery connection without external transient protection-reducing system complexity and cost. The device maintains regulation and does not latch off during such events, provided thermal limits are observed.
How does the LMQ61460AASQRJRRQ1 achieve CISPR25 Class 5 compliance?
The LMQ61460AASQRJRRQ1 achieves CISPR25 Class 5 compliance through its MINT 2 architecture: HotRod™ VQFN-HR package minimizes switch-node ringing; integrated bypass capacitors reduce high-frequency noise; parallel VIN/PGND paths lower loop inductance; pseudo-random spread spectrum lowers peak emissions; and adjustable SW node rise time via RBOOT fine-tunes EMI profile. These features are validated in TI's certified test lab per CISPR25 Ed.4.
Can the LMQ61460AASQRJRRQ1 operate with an external clock synchronization signal?
Yes, the LMQ61460AASQRJRRQ1 accepts external synchronization via the EN/SYNC pin (Pin 7). A clean CMOS clock signal (200 kHz–2.2 MHz) applied to this pin forces the device into FPWM mode, disabling Auto Mode frequency foldback. The rising edge triggers synchronization, and AC coupling with a capacitor is recommended to block DC offset. When synchronized, the device maintains tight frequency alignment across multiple converters in a system.
What is the purpose of the BIAS pin on the LMQ61460AASQRJRRQ1, and how should it be connected?
The BIAS pin (Pin 1) on the LMQ61460AASQRJRRQ1 supplies the internal LDO that powers control circuitry. Connecting it to a regulated output voltage (≤12 V) reduces internal power loss and improves light-load efficiency. If the output exceeds 12 V, BIAS must be grounded. A 0.1–1 µF capacitor to AGND is recommended for noise immunity. This configuration lowers IQ to 7 µA at no load-critical for always-on automotive subsystems.
Does the LMQ61460AASQRJRRQ1 support adjustable output voltage, and what is the feedback reference voltage?
Yes, the LMQ61460AASQRJRRQ1 supports adjustable output voltage via the FB pin (Pin 4). The internal reference voltage is 1.0 V ±1% over temperature and line, enabling precise regulation using standard resistor dividers. Fixed 3.3 V and 5 V factory options are also available. For adjustable designs, the FB pin must be connected to the divider tap point-floating or grounding FB will disable regulation and may cause damage.
LMQ61460AASQRJRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 34.2V
- Current - Output:
- 6A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-VQFN-HR (4x3.5)
LMQ61460AASQRJRRQ1 FAQ
1.How can I place an order for LMQ61460AASQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMQ61460AASQRJRRQ1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LMQ61460AASQRJRRQ1 reliable?
The price and inventory of LMQ61460AASQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMQ61460AASQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LMQ61460AASQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMQ61460AASQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMQ61460AASQRJRRQ1?
LMQ61460AASQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMQ61460AASQRJRRQ1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LMQ61460AASQRJRRQ1?
For technical support, including LMQ61460AASQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMQ61460AASQRJRRQ1 requirements.
6.How does Aetrix verify that LMQ61460AASQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMQ61460AASQRJRRQ1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LMQ61460AASQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LMQ61460AASQRJRRQ1?
All LMQ61460AASQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMQ61460AASQRJRRQ1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LMQ61460AASQRJRRQ1 part is unused and in its original packaging.
Return procedure for LMQ61460AASQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMQ61460AASQRJRRQ1 Tags
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