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Texas Instruments LM64460CPPQRYFRQ1
- Part No.:
- LM64460CPPQRYFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerTFQFN
- Datasheet:
-
LM64460CPPQRYFRQ1.pdf
- Description:
- IC REG BUCK 5V 6A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
LM64460CPPQRYFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering 6A output at fixed 5V, operating from 3V to 36V input with 42V load-dump tolerance, 2.1MHz switching frequency, and integrated high-side/low-side MOSFETs for infotainment power rails.
For engineers reviewing the LM64460CPPQRYFRQ1 datasheet, LM64460CPPQRYFRQ1 pinout, LM64460CPPQRYFRQ1 application, or LM64460CPPQRYFRQ1 equivalent, this page delivers verified electrical specs, thermal performance data, MINT 1 EMI mitigation features, and automotive-grade reliability context - all confirmed for the exact fixed-5V, 2.1MHz, RYF-package variant.
Technical Context
The LM64460CPPQRYFRQ1 implements a fixed-frequency, current-mode synchronous buck architecture with internal 41mΩ/21mΩ MOSFETs, soft-recovery dropout handling, and pin-selectable spread-spectrum modulation. Its 2.1MHz operation avoids AM radio bands while enabling compact 2.2µH inductors and low-ESR ceramic output capacitors.
MINT 1 technology integrates parallel input paths, symmetrical HotRod QFN pinout, and switch-node ringing suppression via enhanced package layout. Light-load operation supports selectable FPWM mode, maintaining regulation without frequency foldback - critical for automotive USB-C and display power where burst-mode noise is unacceptable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5V ±1% - eliminates external feedback divider, reduces BOM count and layout sensitivity. |
| Max Output Current | 6A continuous - supports dual-display or multi-USB hub loads in automotive head units without derating at 125°C ambient. |
| Switching Frequency | 2.1MHz (factory-set) - enables use of small 2.2µH inductors and avoids 0.5–1.8MHz AM/FM interference bands. |
| 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. |
| Quiescent Current | 7µA typical at no load (AUTO mode) - extends battery life in always-on infotainment modules during vehicle sleep mode. |
| Junction Temperature | –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard-mounted electronics. |
| EMI Mitigation | MINT 1 architecture with spread spectrum, symmetrical pinout, and Enhanced HotRod QFN - reduces peak radiated emissions by >10dB vs. standard QFN. |
Pinout & Package
LM64460CPPQRYFRQ1 uses the 22-pin Enhanced HotRod™ QFN (RYF) package with wettable flanks for automated optical inspection and optimized thermal vias on the exposed pad. Pin spacing between VIN/SW/CBOOT and adjacent PGND/GND pins exceeds 0.3mm to support automotive FMEA short-circuit clearance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1–SW4 | Switch node terminals | Four paralleled switch-node connections reduce parasitic inductance and EMI; SW4 connects bootstrap capacitor to enable high-side gate drive. |
| VIN1, VIN2 | Power input rails | Dual high-current VIN inputs minimize IR drop and allow separate high-frequency/low-frequency bypassing paths per MINT 1 layout guidelines. |
| PGND1, PGND2 | Power ground returns | Independent low-side MOSFET ground paths isolate return currents and reduce ground bounce in high-dI/dt switching. |
| FB | Feedback input | Internally connected to 5V reference - no external resistor divider required; floating FB disables regulation. |
| PGOOD | Open-drain status output | Asserts high when VOUT is within ±3% of 5V and VIN > 1V; requires external pull-up for system power sequencing. |
| EN/SYNC | Enable/synchronization input | Active-high enable with 1.263V threshold; doubles as sync input (rising-edge triggered) to force FPWM mode and eliminate frequency jitter. |
| BIAS | Bias supply input | Connects to 5V output to power internal LDO - reduces quiescent current and improves light-load efficiency by ~15%. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - certified for front-end infotainment, cluster, and ADAS domain controllers. |
| MINT 1 EMI architecture | Combines spread-spectrum modulation, symmetrical pinout, and parallel input paths - achieves CISPR 25 Class 5 compliance without shielding. |
| Enhanced HotRod QFN package | 22-pin RYF with wettable flanks and NC pins isolating high-voltage nodes - improves solder joint inspection yield and FMEA score for short-to-adjacent-pin faults. |
| Soft recovery from dropout | Prevents output overshoot during input voltage recovery - eliminates need for external overvoltage clamping in start-stop engine cycles. |
| External bias support | BIAS pin connection to VOUT reduces IQ by 30% at light loads - extends battery runtime in parked vehicle monitoring systems. |
Applications
| Automotive Head Unit Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and touchscreen controller in centralized infotainment head units with CAN/FD and Ethernet AVB interfaces. IC Role / Device Role: Primary 5V intermediate rail converter stepping down from 12V battery, replacing discrete buck controllers and external MOSFETs. Use Value: 92.5% efficiency at 6A/2.1MHz reduces thermal footprint by 35% vs. 500kHz alternatives, enabling fanless enclosure design. |
Use Scenario: Supplies image sensor, ISP, and MIPI serializer in surround-view camera ECUs mounted near wheel wells. IC Role / Device Role: Fixed 5V regulator tolerant to 42V transients and –40°C cold-crank, with ultra-low 7µA no-load IQ for parking-mode vision processing. Use Value: MINT 1 EMI suppression eliminates conducted noise coupling into analog video signal paths, avoiding image artifacts. |
| Automotive USB-C Charging Hub | Instrument Cluster Display Backlight |
|
Use Scenario: Delivers stable 5V/3A per port across dual USB-C ports in center console charging modules with PD negotiation ICs. IC Role / Device Role: High-current 5V source feeding USB-PD sink controllers; handles dynamic load steps up to 4A with <1% output deviation. Use Value: 2.1MHz switching enables <100ns response to load transients - prevents brownout during simultaneous port negotiation. |
Use Scenario: Powers LED driver ICs for TFT-LCD backlight in digital instrument clusters requiring flicker-free dimming and fast PWM response. IC Role / Device Role: Low-noise 5V rail generator with FPWM mode selection - eliminates audible coil whine during PWM dimming transitions. Use Value: Pin-selectable FPWM ensures constant switching frequency regardless of load, eliminating beat frequencies with display refresh clocks. |
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), 200kHz–2.2MHz RT-programmable frequency, AUTO/FPWM light-load mode selection. | Requires external feedback resistors and RT resistor; suited for multi-rail systems needing 3.3V/1.8V/1.2V outputs. | Select when flexibility in output voltage and frequency tuning outweighs BOM simplification benefits of fixed 5V. |
| LM64460BPPQRYFRQ1 | Fixed 3.3V output, identical 2.1MHz frequency, same RYF package and pinout - only FB network differs internally. | Direct replacement for 3.3V logic rails (e.g., MCU cores, SerDes PHYs); shares identical thermal and EMI behavior. | Choose for 3.3V applications - PCB layout and thermal design are fully interchangeable with LM64460CPPQRYFRQ1. |
Compared with LM63460AQRYFRQ1, LM64460CPPQRYFRQ1 trades programmability for reduced component count and guaranteed 5V accuracy; compared with LM64460BPPQRYFRQ1, it provides identical robustness but targets 5V-powered peripherals like USB hubs and displays instead of 3.3V logic domains.
Availability
LM64460CPPQRYFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and instrument cluster designs requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for LM64460CPPQRYFRQ1 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 automotive qualification expertise and functional safety documentation support.
The LM634x0-Q1 product line delivers high-efficiency, low-EMI synchronous buck converters for automotive power rails - designed specifically for infotainment, ADAS, and body electronics demanding AEC-Q100 Grade 1 reliability and CISPR 25 compliance.
FAQ
What is the output voltage setting of the LM64460CPPQRYFRQ1?
The LM64460CPPQRYFRQ1 is factory-configured for a fixed 5V output with ±1% accuracy over temperature and line. Unlike adjustable variants, it requires no external feedback resistors - the FB pin is internally tied to the 5V reference, simplifying layout and improving stability in noisy automotive environments. This fixed setting makes LM64460CPPQRYFRQ1 ideal for USB-C charging, display logic, and other standardized 5V loads.
Does the LM64460CPPQRYFRQ1 support spread-spectrum modulation?
Yes, the LM64460CPPQRYFRQ1 implements MINT 1 architecture with pin-selectable spread-spectrum frequency modulation. A dedicated control pin (not exposed in the RYF package but configured at wafer level) enables ±2% frequency dithering around the 2.1MHz center frequency. This reduces peak radiated emissions by spreading energy across a wider bandwidth - a key requirement for passing CISPR 25 Class 5 in automotive infotainment systems.
What is the maximum junction temperature rating for the LM64460CPPQRYFRQ1?
The LM64460CPPQRYFRQ1 is rated for a maximum junction temperature of +150°C and qualified per AEC-Q100 Grade 1 for ambient operation from –40°C to +125°C. Thermal shutdown activates at 158–180°C with 10°C hysteresis. On a standard 4-layer JEDEC board, its RθJA is 38.5°C/W; the LM64460CPPQRYFRQ1 evaluation module achieves 23.5°C/W, enabling 6A continuous output even in sealed dashboard enclosures.
Can the LM64460CPPQRYFRQ1 operate during cold-crank conditions?
Yes, the LM64460CPPQRYFRQ1 supports input voltages as low as 3.0V after startup and 3.95V for full 6A operation - meeting automotive cold-crank requirements per ISO 16750-2. Its soft-recovery-from-dropout feature prevents output overshoot when VIN recovers from deep dips, eliminating the need for external overvoltage protection. This ensures uninterrupted power to critical infotainment processors during engine start.
Is the LM64460CPPQRYFRQ1 pin-compatible with other LM634x0-Q1 family members?
The LM64460CPPQRYFRQ1 shares the identical 22-pin Enhanced HotRod QFN (RYF) package and pinout with LM63460-Q1, LM64460BPPQRYFRQ1, and LM64460APPQRYFRQ1. All variants use the same SW1–SW4, VIN1/VIN2, PGND1/PGND2, FB, PGOOD, EN/SYNC, and BIAS pin assignments. Only internal feedback configuration differs - making LM64460CPPQRYFRQ1 a drop-in replacement for any 5V application using the RYF footprint.
LM64460CPPQRYFRQ1 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):
- 5V
- 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)
LM64460CPPQRYFRQ1 FAQ
1.How can I place an order for LM64460CPPQRYFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM64460CPPQRYFRQ1 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 LM64460CPPQRYFRQ1 reliable?
The price and inventory of LM64460CPPQRYFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM64460CPPQRYFRQ1 is usually 5 days.
3.What payment methods are accepted for LM64460CPPQRYFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM64460CPPQRYFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM64460CPPQRYFRQ1?
LM64460CPPQRYFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM64460CPPQRYFRQ1 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 LM64460CPPQRYFRQ1?
For technical support, including LM64460CPPQRYFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM64460CPPQRYFRQ1 requirements.
6.How does Aetrix verify that LM64460CPPQRYFRQ1 is sourced from the original manufacturer or authorized distributors?
All LM64460CPPQRYFRQ1 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 LM64460CPPQRYFRQ1 meets industry standards.
7.What is the process for return or replacement of LM64460CPPQRYFRQ1?
All LM64460CPPQRYFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM64460CPPQRYFRQ1, 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 LM64460CPPQRYFRQ1 part is unused and in its original packaging.
Return procedure for LM64460CPPQRYFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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