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Texas Instruments LM64460BPPQRYFRQ1
- Part No.:
- LM64460BPPQRYFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerTFQFN
- Datasheet:
-
LM64460BPPQRYFRQ1.pdf
- Description:
- IC REG BUCK 3.3V 6A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
LM64460BPPQRYFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering 6A output at fixed 3.3V, operating from 3V to 36V input with 42V load-dump tolerance, 2.1MHz fixed switching frequency, and integrated high-side/low-side MOSFETs for infotainment power rails.
For engineers reviewing the LM64460BPPQRYFRQ1 datasheet, LM64460BPPQRYFRQ1 pinout, LM64460BPPQRYFRQ1 application, or LM64460BPPQRYFRQ1 equivalent, this page delivers verified electrical specs, validated pin functions, confirmed thermal performance, EMI-mitigated layout guidance, and real-world automotive use-case mapping - all specific to the LM64460BPPQRYFRQ1 fixed-3.3V variant.
Technical Context
The LM64460BPPQRYFRQ1 implements MINT 1 architecture with spread-spectrum frequency modulation, symmetrical Enhanced HotRod QFN pinout, and parallel input paths to minimize parasitic inductance. It integrates dual N-channel MOSFETs (RDS(on) HS = 41–82 mΩ, LS = 21–45 mΩ) and supports FPWM/PFM light-load operation with 7µA no-load IQ.
Its fixed 3.3V output eliminates external feedback resistors, while the 2.1MHz switching frequency avoids AM radio bands and enables compact 2.2µH inductors. The device features soft-recovery-from-dropout, hiccup-mode overcurrent protection, and thermal shutdown at 158–180°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±1% - eliminates external feedback divider, reduces BOM count and layout sensitivity. |
| Output Current | 6A continuous - supports high-power ADAS sensors or multi-core MCU cores without external current sharing. |
| Input Voltage Range | 3V to 36V with 42V transient tolerance - sustains operation during cold-crank (3V) and load-dump (42V) events per ISO 7637-2. |
| Switching Frequency | Fixed 2.1MHz - enables small passive components, avoids 0.5–1.8MHz AM band, and supports tight EMI filtering. |
| No-Load Quiescent Current | 7µA typical - extends battery life in always-on vehicle modules such as telematics or gateway ECUs. |
| Junction Temperature Range | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard-mounted applications. |
| Thermal Resistance (RθJA) | 23.5°C/W on EVM - enables 6A operation at +85°C ambient without forced airflow when using recommended PCB layout. |
Pinout & Package
LM64460BPPQRYFRQ1 uses a 22-pin Enhanced HotRod™ QFN (RYF) package with wettable flanks for automated optical inspection and optimized thermal/EMI performance. Exposed thermal pad must be connected to inner-layer ground plane via ≥9 thermal vias (0.3mm diameter).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1–SW4 | Switch node terminals | Four parallel switch-node connections reduce current density and EMI; SW4 connects bootstrap capacitor to SW path. |
| VIN1 / VIN2 | Primary input power inputs | Dual high-current VIN pins enable low-impedance, symmetric input routing to minimize loop inductance. |
| PGND1 / PGND2 | Power ground return paths | Separated ground pins isolate high-di/dt return currents and improve FMEA robustness against adjacent-pin shorts. |
| FB | Feedback input | Internally tied to 3.3V reference - no external resistor required; floating FB disables regulation. |
| EN/SYNC | Enable and sync input | Logic-level enable (1.263V threshold); also accepts external clock for synchronization in FPWM mode. |
| PGOOD | Open-drain power-good indicator | Signals valid regulation (92–110% of 3.3V); asserts low during UVLO, overtemperature, or overvoltage faults. |
| BIAS | Bias supply input | Connects to 3.3V output to power internal LDO efficiently; improves light-load efficiency by reducing VCC losses. |
Key Features
| Feature | Design Value |
|---|---|
| MINT 1 EMI mitigation | Spread-spectrum modulation + symmetrical pinout + Enhanced HotRod package reduces peak radiated emissions by >10dB vs. standard QFN. |
| Automotive functional safety support | Documentation available for ISO 26262 ASIL-B system integration; includes FIT rate data and failure mode analysis reports. |
| Dropout recovery behavior | Soft-recovery-from-dropout prevents output overshoot during line transients - critical for powering sensitive SoCs. |
| Light-load PFM mode | Enables 7µA no-load IQ and maintains >71% efficiency at 100µA load - ideal for always-on vehicle subsystems. |
| FMEA-optimized pinout | NC pins separate high-voltage (VIN, SW, CBOOT) and low-voltage (PGND, GND, FB) terminals to prevent short-circuit propagation. |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers SoC, DDR memory, and display interface in automotive head units requiring stable 3.3V at up to 6A during video decoding. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator with fixed output, 2.1MHz switching, and load-dump immunity. Use Value: Eliminates external feedback network, reduces solution size by 25%, and maintains regulation during cranking (3V input). |
Use Scenario: Supplies image sensor and ISP in front-facing ADAS cameras exposed to engine bay temperatures up to +125°C ambient. IC Role / Device Role / Timing Role: High-reliability 3.3V power stage with AEC-Q100 Grade 1 qualification and thermal shutdown at 158°C. Use Value: Delivers 6A continuous current with <23.5°C/W RθJA, enabling convection-only cooling in sealed camera housings. |
| Body Control Module (BCM) Core Rail | Telematics Control Unit (TCU) Always-On Supply |
Use Scenario: Generates 3.3V core rail for microcontrollers and CAN transceivers in door modules and seat controllers. IC Role / Device Role / Timing Role: Automotive-grade buck converter with precision enable (1.263V threshold) for controlled wake-up sequencing. Use Value: Supports cold-crank operation down to 3V input and consumes only 7µA in standby - extends battery life during parking mode. |
Use Scenario: Provides always-on 3.3V supply for cellular modem, GNSS receiver, and secure element in TCU gateways. IC Role / Device Role / Timing Role: Low-IQ buck regulator with 0.6µA shutdown current and PGOOD monitoring for system health reporting. Use Value: Meets UNECE R155 cybersecurity gateway requirements via reliable power-good signaling and fail-safe shutdown behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM63460AQRYFRQ1 | Adjustable output (1V–95% VIN), 6A, 200kHz–2.2MHz RT-programmable frequency | Requires external feedback resistors; supports multiple output voltages on same PCB footprint | Select when design requires flexibility across 3.3V/5V/12V rails or frequency tuning for EMI compliance. |
| LM64460CPPQRYFRQ1 | Fixed 5V output, identical 6A rating, 2.1MHz, same RYF package and pinout | Same thermal and layout design; only differs in internal feedback reference | Choose for 5V-powered radar processors or Ethernet PHYs where 3.3V is not required. |
Compared with LM64460BPPQRYFRQ1, LM63460AQRYFRQ1 offers programmability at the cost of added BOM and layout complexity, while LM64460CPPQRYFRQ1 provides identical mechanical and thermal behavior with only output voltage changed - enabling drop-in voltage variant reuse in platform designs.
Availability
LM64460BPPQRYFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control systems requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM64460BPPQRYFRQ1 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 ICs, with decades of automotive qualification expertise and broad functional safety documentation support.
The LM64460BPPQRYFRQ1 belongs to TI's LM634x0-Q1 family of automotive synchronous buck converters, designed specifically for high-reliability power delivery in infotainment, ADAS, and body electronics where EMI, thermal, and transient robustness are critical.
FAQ
What is the output voltage setting of the LM64460BPPQRYFRQ1?
The LM64460BPPQRYFRQ1 has a factory-trimmed fixed 3.3V output voltage with ±1% accuracy over temperature and line. Unlike adjustable variants, it requires no external feedback resistors - the FB pin is internally connected to the 3.3V reference, simplifying layout and improving noise immunity. This makes LM64460BPPQRYFRQ1 ideal for dedicated 3.3V rails in automotive SoC or sensor power domains.
Does the LM64460BPPQRYFRQ1 support synchronization to an external clock?
Yes, the LM64460BPPQRYFRQ1 supports external clock synchronization via its EN/SYNC pin. When a clean CMOS clock signal (200kHz–2.2MHz) is AC-coupled to EN/SYNC, the device locks to the external frequency and operates in forced PWM (FPWM) mode, disabling automatic PFM transitions. This ensures deterministic timing for EMI reduction and multi-rail phase alignment in complex automotive power trees.
What package type and thermal characteristics does the LM64460BPPQRYFRQ1 use?
The LM64460BPPQRYFRQ1 uses a 22-pin Enhanced HotRod™ QFN (RYF) package with wettable flanks for automated optical inspection. Its thermal resistance is 23.5°C/W on the TI evaluation module, achieved via an exposed thermal pad connected to inner-layer ground planes with ≥9 thermal vias. This allows full 6A output at +85°C ambient without forced airflow when following TI's layout guidelines.
How does the LM64460BPPQRYFRQ1 handle automotive load-dump transients?
The LM64460BPPQRYFRQ1 withstands 42V load-dump transients per ISO 7637-2 thanks to its 42V absolute maximum input rating and integrated overvoltage protection circuitry. During such events, the device remains latched in regulation if input stays within 3V–42V, and its soft-recovery-from-dropout feature prevents output overshoot when input recovers - protecting downstream 3.3V logic and memory interfaces powered by LM64460BPPQRYFRQ1.
Is the LM64460BPPQRYFRQ1 qualified for functional safety applications?
Yes, the LM64460BPPQRYFRQ1 is functional safety-capable with documentation available to support ISO 26262 ASIL-B system development. TI provides FIT rate data, failure mode distribution reports, and diagnostic coverage analysis for the LM64460BPPQRYFRQ1, enabling integration into safety-critical domains like ADAS domain controllers and vehicle gateways where power integrity directly impacts system-level safety goals.
LM64460BPPQRYFRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 22-PowerTFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 6A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 22-VQFN-HR (3.5x4)
LM64460BPPQRYFRQ1 FAQ
1.How can I place an order for LM64460BPPQRYFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM64460BPPQRYFRQ1 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 LM64460BPPQRYFRQ1 reliable?
The price and inventory of LM64460BPPQRYFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM64460BPPQRYFRQ1 is usually 5 days.
3.What payment methods are accepted for LM64460BPPQRYFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM64460BPPQRYFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM64460BPPQRYFRQ1?
LM64460BPPQRYFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM64460BPPQRYFRQ1 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 LM64460BPPQRYFRQ1?
For technical support, including LM64460BPPQRYFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM64460BPPQRYFRQ1 requirements.
6.How does Aetrix verify that LM64460BPPQRYFRQ1 is sourced from the original manufacturer or authorized distributors?
All LM64460BPPQRYFRQ1 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 LM64460BPPQRYFRQ1 meets industry standards.
7.What is the process for return or replacement of LM64460BPPQRYFRQ1?
All LM64460BPPQRYFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM64460BPPQRYFRQ1, 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 LM64460BPPQRYFRQ1 part is unused and in its original packaging.
Return procedure for LM64460BPPQRYFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM64460BPPQRYFRQ1 Tags
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