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Texas Instruments LM64460APPSRYFRQ1
- Part No.:
- LM64460APPSRYFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerTFQFN
- Datasheet:
-
LM64460APPSRYFRQ1.pdf
- Description:
- IC REG BUCK ADJ 6A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,924
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Product details
Overview
LM64460APPSRYFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering 6A output current, supporting 3V–36V input with 42V load-dump tolerance, fixed 2.1MHz switching frequency, and tri-temperature test screening for ADAS power rails.
For engineers reviewing the LM64460APPSRYFRQ1 datasheet, LM64460APPSRYFRQ1 pinout, LM64460APPSRYFRQ1 application, or LM64460APPSRYFRQ1 equivalent, this page delivers verified electrical specs, MINT 1 noise mitigation architecture details, thermal derating guidance, and automotive-grade reliability validation - all specific to the LM64460APPSRYFRQ1 variant.
Technical Context
The LM64460APPSRYFRQ1 implements Mitigated Interference and Noise Technology (MINT 1) with spread-spectrum modulation, symmetrical Enhanced HotRod QFN pinout, and parallel input paths to minimize parasitic inductance. It integrates high-side (41mΩ typ) and low-side (21mΩ typ) MOSFETs with soft-recovery dropout behavior and zero-cross current limiting.
Its fixed 2.1MHz switching frequency eliminates external RT resistor dependency and enables compact filter design; pin-selectable spread spectrum and light-load mode (FPWM or AUTO) are configured via dedicated pins, not internal registers. Thermal shutdown triggers at 158°C–180°C with 10°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 36V continuous, withstands 42V load-dump transients - supports full automotive battery range including cold-crank and jump-start conditions. |
| Output Current | 6A continuous - sufficient for powering SoCs, radar processors, or multi-rail domain controllers in ADAS ECUs. |
| Switching Frequency | Fixed 2.1MHz - avoids AM band interference, enables use of small 0.47µH inductors and ceramic output capacitors. |
| Feedback Accuracy | ±1% over –40°C to +125°C ambient - ensures stable voltage regulation for sensitive imaging sensors and SerDes interfaces. |
| Quiescent Current | 7µA typical at no load (AUTO mode) - extends battery life during vehicle sleep modes without compromising wake-up responsiveness. |
| Junction Temperature Limit | 150°C max operating, 158–180°C thermal shutdown - validated for under-hood placement with minimal heatsinking. |
| EMI Performance | MINT 1 architecture with spread-spectrum modulation (±2% center deviation) and Enhanced HotRod QFN package - reduces peak EMI by >10dB vs. standard QFN. |
Pinout & Package
LM64460APPSRYFRQ1 uses a 22-pin Enhanced HotRod™ QFN (RYF) package with wettable flanks for automated optical inspection and optimized clearance between high-voltage (VIN, SW, CBOOT) and low-voltage (PGND, GND, FB) pins per automotive FMEA requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW1–SW4 | Switch node terminals | Distributed high-current switch outputs reduce current density and EMI; SW4 connects bootstrap capacitor for high-side gate drive. |
| VIN1 / VIN2 | Primary input power inputs | Dual VIN pins enable low-inductance parallel routing to input capacitors - critical for minimizing voltage spikes during load dump. |
| PGND1 / PGND2 | Power ground returns | Separated ground paths for high-side and low-side MOSFETs isolate return currents and improve EMI performance. |
| CBOOT | Bootstrap supply rail | Connects 100nF capacitor between SW and CBOOT; internal diode charges boot rail when SW is low - enables efficient high-side drive. |
| FB | Feedback input | Monitors output voltage via resistive divider; ±1% reference accuracy ensures tight regulation across temperature and line/load variations. |
| EN/SYNC | Enable and sync input | Precision enable threshold (1.263V) with 24–32% hysteresis; also accepts external clock for forced FPWM operation - disables PFM mode when synchronized. |
| PGOOD | Open-drain power-good indicator | Signals valid regulation (105–110% upper / 92–96.5% lower threshold); requires external pull-up - used for system sequencing and fault reporting. |
| BIAS | Internal LDO bias input | Connected to VOUT to improve efficiency; optional 0.1–1µF capacitor to GND enhances noise immunity - bypasses internal LDO for lower IQ. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive infotainment and ADAS environmental stress requirements. |
| MINT 1 noise mitigation | Combines spread-spectrum modulation, symmetrical pin layout, and parallel input paths - reduces conducted and radiated EMI without external filters. |
| Tri-temperature test screening | Electrical testing performed at –40°C, +25°C, and +125°C - ensures parametric consistency across full automotive operating range. |
| Soft recovery from dropout | Eliminates output overshoot during input brownout recovery - protects downstream logic and analog circuitry from voltage transients. |
| Enhanced HotRod QFN with wettable flanks | Enables 100% automated visual solder-joint inspection - improves manufacturing yield and field reliability in safety-critical applications. |
Applications
| Automotive ADAS Camera Module | Automotive Infotainment Head Unit |
|---|---|
Use Scenario: Powers image signal processor (ISP), MIPI CSI-2 serializer, and CMOS sensor in front-facing ADAS camera. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic and analog rails with ultra-low noise and fast transient response. Use Value: MINT 1 architecture ensures compliance with CISPR 25 Class 5 radiated emissions limits without ferrite beads or shielding cans. |
Use Scenario: Supplies SoC core, DDR memory, and display interface in centralized head unit with multiple USB ports and audio codecs. IC Role / Device Role / Timing Role: High-efficiency 6A buck converter delivering stable 1.1V/1.8V/3.3V rails from 12V battery with minimal thermal footprint. Use Value: 7µA no-load IQ extends battery hold-up time during vehicle off-state; 2.1MHz switching allows <10mm² total solution size. |
| Automotive Radar Processing Unit | Automotive Body Control Module (BCM) |
Use Scenario: Provides clean 1.2V/1.8V supplies for 77GHz radar MMICs and DSPs in corner radar modules mounted near wheel wells. IC Role / Device Role / Timing Role: Input-tolerant buck regulator handling wide input swings (5V–16V) during engine cranking and alternator ripple. Use Value: 42V load-dump rating and 150°C junction limit enable direct battery connection without upstream TVS or pre-regulator. |
Use Scenario: Powers microcontroller, CAN transceivers, and LED drivers in door module or lighting control ECU. IC Role / Device Role / Timing Role: Compact, robust 6A buck replacing discrete solutions for multi-rail power management in space-constrained modules. Use Value: Tri-temperature screening and AEC-Q100 qualification ensure long-term reliability in high-vibration, thermally cycling environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM63460AFSQRYFRQ1 | Adjustable frequency (200kHz–2.2MHz) via RT pin; FPWM-only light-load mode; standard temperature screening. | Used where frequency tuning is required to avoid EMI-sensitive bands or optimize efficiency at light loads. | Select when variable switching frequency or guaranteed FPWM operation at all loads is needed - not pin-compatible due to RT pin function. |
| LM64460BPPQRYFRQ1 | Fixed 3.3V output; same 2.1MHz frequency and tri-temperature screening; identical pinout and package. | Deployed in cost-sensitive designs requiring only 3.3V rail without external feedback divider. | Drop-in replacement if 3.3V output suffices; shares same layout and thermal profile - differs only in FB network configuration. |
Compared with LM64460APPSRYFRQ1, LM63460AFSQRYFRQ1 offers frequency flexibility but lacks tri-temperature validation, while LM64460BPPQRYFRQ1 provides identical timing and reliability with fixed 3.3V output - enabling faster BOM rationalization where adjustable VOUT is unnecessary.
Availability
LM64460APPSRYFRQ1 is available at Aetrix Electronics and suitable for automotive ADAS, infotainment, and body electronics applications requiring stable component supply, AEC-Q100 compliance, and tri-temperature screening.
Supply support for LM64460APPSRYFRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive power management ICs and functional safety solutions.
The LM64460-Q1 product line delivers high-reliability, low-noise buck converters for safety-critical automotive subsystems, emphasizing EMI robustness, thermal resilience, and AEC-Q100-compliant validation across temperature extremes.
FAQ
What is the maximum input voltage rating for LM64460APPSRYFRQ1?
The LM64460APPSRYFRQ1 supports a continuous input voltage range of 3V to 36V and is rated to withstand 42V load-dump transients per ISO 7637-2 Pulse 5a. This rating is validated across the full –40°C to +125°C ambient temperature range and applies to both VIN1 and VIN2 pins simultaneously.
Does LM64460APPSRYFRQ1 support adjustable output voltage?
Yes, LM64460APPSRYFRQ1 supports adjustable output voltage from 1V to 95% of VIN using an external resistor divider on the FB pin. Its ±1% reference voltage accuracy and low FB input current (1–50nA) ensure precise regulation across temperature and line/load conditions.
How does the tri-temperature screening of LM64460APPSRYFRQ1 differ from standard automotive qualification?
LM64460APPSRYFRQ1 undergoes full electrical testing at –40°C, +25°C, and +125°C - not just characterization - ensuring parametric compliance across the entire AEC-Q100 Grade 1 ambient range. This provides higher confidence in real-world performance versus standard screening that tests only at room temperature.
Can LM64460APPSRYFRQ1 operate in forced PWM (FPWM) mode?
Yes, LM64460APPSRYFRQ1 supports pin-selectable FPWM mode via its EN/SYNC pin configuration. When synchronized to an external clock, it operates exclusively in FPWM mode with fixed frequency and phase - disabling automatic PFM transition to maintain deterministic timing in noise-sensitive systems.
What thermal performance can be expected from LM64460APPSRYFRQ1 in a typical 4-layer PCB layout?
In a standard JEDEC 4-layer board layout, LM64460APPSRYFRQ1 achieves a junction-to-ambient thermal resistance (RθJA) of 23.5°C/W. With proper thermal vias under the exposed pad and 1-in² copper area, it sustains 6A continuous output at +85°C ambient without derating - validated per LM63460-Q1 EVM User's Guide.
LM64460APPSRYFRQ1 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:
- 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:
- 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)
LM64460APPSRYFRQ1 FAQ
1.How can I place an order for LM64460APPSRYFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM64460APPSRYFRQ1 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 LM64460APPSRYFRQ1 reliable?
The price and inventory of LM64460APPSRYFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM64460APPSRYFRQ1 is usually 5 days.
3.What payment methods are accepted for LM64460APPSRYFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM64460APPSRYFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM64460APPSRYFRQ1?
LM64460APPSRYFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM64460APPSRYFRQ1 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 LM64460APPSRYFRQ1?
For technical support, including LM64460APPSRYFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM64460APPSRYFRQ1 requirements.
6.How does Aetrix verify that LM64460APPSRYFRQ1 is sourced from the original manufacturer or authorized distributors?
All LM64460APPSRYFRQ1 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 LM64460APPSRYFRQ1 meets industry standards.
7.What is the process for return or replacement of LM64460APPSRYFRQ1?
All LM64460APPSRYFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM64460APPSRYFRQ1, 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 LM64460APPSRYFRQ1 part is unused and in its original packaging.
Return procedure for LM64460APPSRYFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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