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Texas Instruments LMQ61460AASRJRR
- Part No.:
- LMQ61460AASRJRR
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LMQ61460AASRJRR.pdf
- Description:
- IC REG BUCK ADJ 6A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,925
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Product details
Overview
LMQ61460AASRJRR from Texas Instruments is a 3V to 36V input, 6A synchronous step-down DC-DC converter with integrated high-side and low-side MOSFETs, MINT 2 EMI mitigation architecture, and adjustable 200kHz–2.2MHz switching frequency. It delivers 95% efficiency at 4A/5V output with 7µA no-load quiescent current and supports 42V input transients - deployed in industrial robot CPU boards and USB Type-C power delivery systems.
For engineers reviewing the LMQ61460AASRJRR datasheet, LMQ61460AASRJRR pinout, LMQ61460AASRJRR application, or LMQ61460AASRJRR equivalent, key selection considerations include its VQFN-HR (RJR) 14-pin package, dual-VIN parallel input path for low parasitic inductance, adjustable SW node rise time via RBOOT, integrated bypass capacitors, and functional safety documentation support.
Technical Context
The LMQ61460AASRJRR implements peak-current-mode control with pseudo-random spread spectrum and auto mode frequency foldback. Its dual-input VIN1/VIN2 pins feed independent power paths to minimize loop inductance, while internal bypass capacitors reduce high-frequency noise injection into the input rail.
MINT 2 architecture integrates HotRod™ packaging, adjustable SW node rise time (2.15–2.7 ns), and optimized pinout to suppress switch-node ringing and peak EMI emissions - enabling compliance with CISPR 22 Class B without shielding. Synchronization capability (200kHz–2.2MHz) and external bias (BIAS pin) support system-level timing coordination and efficiency optimization across load ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V continuous; withstands 42 V transients - simplifies input surge protection design in industrial environments. |
| Output Current | 6 A continuous DC output - supports high-power rails for CPU cores and FPGA I/O banks. |
| Switching Frequency | Adjustable 200 kHz to 2.2 MHz via RT pin - enables compact magnetics at high frequency or high-efficiency operation at low frequency. |
| Quiescent Current | 7 µA typical at no load (VIN = 13.5 V, VOUT = 3.3 V) - extends battery life in always-on applications. |
| Efficiency | 95% typical at 4 A, 5 V output, 400 kHz - reduces thermal stress and eliminates need for heatsinks in space-constrained designs. |
| RDS(ON) | High-side: 41 mΩ typ; low-side: 21 mΩ typ - minimizes conduction loss and improves full-load efficiency. |
| Thermal Resistance | RθJA = 59 °C/W (4-layer JEDEC board) - supports >4 A operation at 70°C ambient with standard PCB layout. |
Pinout & Package
VQFN-HR (RJR) 14-pin package, 4.00 mm × 3.50 mm footprint, exposed thermal pad - optimized for low-inductance layout and enhanced thermal dissipation in high-density industrial PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS (1) | Power input to internal LDO | Connects to output voltage rail to improve light-load efficiency; optional 0.1–1 µF capacitor to AGND enhances noise immunity. |
| VCC (2) | Internal LDO output | Supplies internal control circuitry; requires 1 µF capacitor to AGND - not for external loading. |
| AGND (3) | Analog ground reference | Reference point for FB and VCC; must be tied to both PGND1 and PGND2 on PCB to prevent ground bounce. |
| FB (4) | Feedback input | Connects to resistor divider tap for adjustable output voltage; high-impedance input (10 nA bias current) enables precision regulation. |
| PGOOD (5) | Open-drain power-good status | Signals regulation status (high = OK); active-low fault indication during UVLO, overvoltage, or thermal shutdown. |
| RT (6) | Frequency setting/resync input | Resistor-to-ground sets fSW (200 kHz–2.2 MHz); also accepts external sync clock on rising edge. |
| EN/SYNC (7) | Enable/synchronization input | Logic-controlled startup (VEN = 1.263 V threshold); doubles as precision UVLO and system clock sync interface. |
| VIN1 (8), VIN2 (12) | Dual input power rails | Parallel input paths reduce parasitic inductance; each requires local high-quality bypass capacitor to respective PGND. |
| PGND1 (9), PGND2 (11) | Power ground returns | Separate low-side MOSFET ground paths; low-impedance connection between them minimizes ground loop noise. |
| SW (10) | Switch node | Connects to output inductor; features adjustable rise time (via RBOOT) and minimized ringing due to HotRod™ package. |
| RBOOT (13) | SW rise-time control | Resistor between RBOOT and CBOOT sets SW node slew rate (2.15–2.7 ns), directly tuning EMI performance. |
| CBOOT (14) | High-side gate driver supply | 100 nF capacitor between CBOOT and SW provides bootstrap charge; internal diode connects to VCC for self-recharge. |
Key Features
| Feature | Design Value |
|---|---|
| MINT 2 EMI mitigation | Combines HotRod™ package, internal bypass capacitors, parallel VIN paths, spread spectrum, and adjustable SW rise time - achieves CISPR 22 Class B compliance without shielding. |
| Functional safety support | Documentation available for ISO 26262 ASIL-B and IEC 61508 SIL-2 system-level design - includes FIT rate, failure modes, and diagnostic coverage analysis. |
| Dual-VIN input architecture | VIN1 and VIN2 enable independent high-frequency decoupling paths - reduces input loop inductance by >50% vs. single-VIN buck converters. |
| Auto mode light-load efficiency | Frequency foldback drops fSW under light loads, maintaining 90% PFM efficiency at 1 mA and 7 µA no-load IQ - ideal for always-on industrial sensors. |
| Robust transient handling | 42 V absolute max input rating and soft-dropout recovery eliminate output overshoot during 24 V automotive or industrial bus transients. |
Applications
| Industrial Robot CPU Board | USB Type-C Power Delivery |
|---|---|
|
Use Scenario: Powers ARM-based application processor and DDR memory subsystem on robotic motion controller PCB. IC Role / Device Role / Timing Role: Primary 5 V/3.3 V intermediate bus converter delivering stable 6 A output with tight regulation (<±1%) across wide temperature range. Use Value: MINT 2 EMI suppression prevents interference with motor encoder signals and CAN bus communication. |
Use Scenario: Generates 5 V, 9 V, 15 V, or 20 V output from variable USB PD source in portable test equipment. IC Role / Device Role / Timing Role: Adjustable-output buck regulator synchronized to system clock via EN/SYNC pin for deterministic power sequencing. Use Value: 36 V max input and 42 V transient tolerance allow direct connection to unregulated 24 V field bus without pre-regulator. |
| Industrial PC (SBC) | Test & Measurement Instrumentation |
|
Use Scenario: Supplies 3.3 V core logic and 1.8 V I/O rails for x86-based single-board computer in factory automation cabinet. IC Role / Device Role / Timing Role: High-efficiency synchronous buck with external bias (BIAS pin) to maintain >91% efficiency at 100 µA–6 A load range. Use Value: 7 µA no-load IQ extends uptime in fanless, sealed enclosure designs where thermal management is constrained. |
Use Scenario: Provides ultra-low-noise 3.3 V analog supply for ADC reference and op-amp signal chain in benchtop oscilloscope. IC Role / Device Role / Timing Role: Low-EMI buck converter operating at 2.1 MHz to avoid AM band interference with sensitive RF front-end circuits. Use Value: Adjustable SW node rise time and spread spectrum reduce peak radiated emissions below 30 MHz by >10 dBµV/m. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61460AASRJRR | Same pinout, identical RJR package, but lacks MINT 2 EMI features and functional safety documentation. | No integrated bypass capacitors; higher EMI requires additional filtering or shielding in noise-sensitive applications. | Select when cost sensitivity outweighs EMI requirements and functional safety certification is unnecessary. |
| TPSM63606RKR | Module format (integrated inductor); 6 A, 3–36 V input, but fixed 5 V or adjustable 3–12 V output; larger footprint (7.5 mm × 6.5 mm). | Reduces design cycle time but sacrifices layout flexibility and thermal performance vs. discrete solution. | Choose for rapid prototyping or low-volume production where board area and development schedule are critical. |
Compared with LM61460AASRJRR, LM61460AASRJRR offers identical mechanical compatibility but reduced EMI robustness, while TPSM63606RKR trades PCB area and thermal headroom for faster time-to-market - making LMQ61460AASRJRR optimal for high-reliability, EMI-critical industrial deployments.
Availability
LMQ61460AASRJRR is available at Aetrix Electronics and suitable for industrial robot CPU boards, USB Type-C power delivery systems, and test & measurement instrumentation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LMQ61460AASRJRR 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 power management ICs - serving industrial, automotive, and communications markets with high-reliability, application-optimized solutions.
The LMQ61460AASRJRR belongs to TI's high-performance, wide-VIN buck converter product line - engineered specifically for rugged industrial applications demanding low EMI, functional safety readiness, and 42 V transient resilience.
FAQ
What is the maximum input voltage rating for the LMQ61460AASRJRR?
The LMQ61460AASRJRR has an absolute maximum input voltage rating of 42 V across VIN1 and VIN2 pins relative to AGND or PGND. It operates continuously from 3.0 V to 36 V, enabling robust deployment in 24 V industrial buses subject to load-dump transients. This 42 V tolerance eliminates the need for external TVS clamping in many applications.
Does the LMQ61460AASRJRR support synchronization to an external clock?
Yes, the LMQ61460AASRJRR supports external clock synchronization via the EN/SYNC pin. A rising-edge-triggered signal between 200 kHz and 2.2 MHz locks the internal oscillator to the external clock, forcing PWM mode and disabling PFM light-load operation. This ensures deterministic timing in multi-rail power systems and avoids beat frequencies in dense PCB layouts.
How does the BIAS pin improve efficiency in the LMQ61460AASRJRR?
The BIAS pin on the LMQ61460AASRJRR supplies the internal LDO from the output voltage rail instead of VIN, reducing power loss in the bias supply path. When connected to ≥3.4 V outputs, it lowers no-load quiescent current to 7 µA and improves light-load efficiency - especially valuable in battery-powered or energy-harvesting systems where standby power is critical.
What package type and thermal characteristics does the LMQ61460AASRJRR use?
The LMQ61460AASRJRR uses the VQFN-HR (RJR) 14-pin package, measuring 4.00 mm × 3.50 mm with an exposed thermal pad. Its junction-to-ambient thermal resistance is 59 °C/W on a 4-layer JEDEC board, supporting >4 A continuous output at 70°C ambient with standard copper pour. The HotRod™ leadframe minimizes switch-node ringing and improves thermal transfer.
Can the LMQ61460AASRJRR operate in dropout condition, and how is recovery handled?
Yes, the LMQ61460AASRJRR supports dropout operation with soft recovery: when VIN drops near VOUT, the device maintains regulation down to a 0.4 V dropout (at 4 A, 3.3 V out) and avoids output voltage overshoot during recovery. This behavior eliminates the need for external post-regulation LDOs in wide-input industrial power supplies.
LMQ61460AASRJRR 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)
LMQ61460AASRJRR FAQ
1.How can I place an order for LMQ61460AASRJRR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMQ61460AASRJRR 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 LMQ61460AASRJRR reliable?
The price and inventory of LMQ61460AASRJRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMQ61460AASRJRR is usually 5 days.
3.What payment methods are accepted for LMQ61460AASRJRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMQ61460AASRJRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMQ61460AASRJRR?
LMQ61460AASRJRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMQ61460AASRJRR 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 LMQ61460AASRJRR?
For technical support, including LMQ61460AASRJRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMQ61460AASRJRR requirements.
6.How does Aetrix verify that LMQ61460AASRJRR is sourced from the original manufacturer or authorized distributors?
All LMQ61460AASRJRR 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 LMQ61460AASRJRR meets industry standards.
7.What is the process for return or replacement of LMQ61460AASRJRR?
All LMQ61460AASRJRR units undergo pre-shipment inspection (PSI). If there is an issue with LMQ61460AASRJRR, 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 LMQ61460AASRJRR part is unused and in its original packaging.
Return procedure for LMQ61460AASRJRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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