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Texas Instruments LM63460AASQRYFRQ1
- Part No.:
- LM63460AASQRYFRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 22-PowerTFQFN
- Datasheet:
-
LM63460AASQRYFRQ1.pdf
- Description:
- IC REG BUCK ADJ 6A 22VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,914
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Product details
Overview
LM63460AASQRYFRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous buck DC/DC converter delivering up to 6A output current, supporting 3V–36V input with 42V load-dump tolerance, 1% accurate adjustable output (1V to 95% VIN), 200kHz–2.2MHz programmable switching frequency, and MINT 1 noise-mitigation architecture for ADAS and infotainment power rails.
For engineers reviewing the LM63460AASQRYFRQ1 datasheet, LM63460AASQRYFRQ1 pinout, LM63460AASQRYFRQ1 application, or LM63460AASQRYFRQ1 equivalent, key selection criteria include automotive-grade thermal robustness (150°C max junction), spread-spectrum EMI control, FPWM/PFM light-load mode selection, wettable-flank QFN package for solder inspection, and integrated high-side/low-side MOSFETs with 41mΩ/21mΩ RDS(on).
Technical Context
The LM63460AASQRYFRQ1 implements a dual-input, dual-power-ground synchronous buck topology with four SW pins (SW1–SW4) and two VIN/PGND pairs to minimize parasitic inductance and improve FMEA margin. Its MINT 1 architecture integrates spread-spectrum modulation, symmetrical pinout for optimal input capacitor placement, and Enhanced HotRod™ QFN packaging to suppress switch-node ringing.
It supports precision enable with UVLO hysteresis (24–32%), soft-recovery dropout behavior, external bias input for efficiency optimization, and seamless PWM-to-PFM transition. The RT pin enables resistor-based frequency setting (200kHz–2.2MHz), while EN/SYNC doubles as synchronization input with rising-edge triggering and FPWM enforcement when active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3V to 36V, with 42V transient tolerance - enables direct connection to automotive battery without pre-regulator |
| Output Current | 6A continuous - supports high-power SoC rails in head units and ADAS ECUs |
| Output Voltage Accuracy | ±1% over temperature - ensures stable core voltage for safety-critical microcontrollers |
| Switching Frequency | 200kHz to 2.2MHz via RT pin or SYNC - avoids AM band and enables compact magnetics |
| Quiescent Current | 7µA typical at no load - extends battery life in always-on vehicle modules |
| Shutdown Current | 0.6µA typical - meets ultra-low-power requirements for parked-mode systems |
| Thermal Limit | 150°C max junction temperature - certified for under-hood operation per AEC-Q100 Grade 1 |
| EMI Mitigation | Spread-spectrum modulation + parallel input path + symmetrical pinout - reduces peak radiated emissions by >10dB |
Pinout & Package
LM63460AASQRYFRQ1 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) pins to improve FMEA results in functional safety designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN/SYNC | Enable & sync input | Active-high enable with UVLO hysteresis; accepts external clock for forced FPWM mode |
| RT | Frequency set input | Resistor-to-GND sets switching frequency from 200kHz to 2.2MHz |
| FB | Voltage feedback input | Connects to resistor divider for adjustable output; 1V reference enables 1V–95% VIN regulation |
| BIAS | Bias supply input | Connects to VOUT to power internal LDO efficiently; improves light-load efficiency |
| PGOOD | Power-good indicator | Open-drain output signals valid regulation (92–110% VOUT window); requires external pull-up |
| SW1–SW4 | Switch node terminals | Four parallel switch nodes reduce current density and trace inductance; connect to output inductor |
| VIN1/VIN2 | Main input supplies | Dual VIN inputs support low-impedance, parallel input capacitor routing for EMI reduction |
| PGND1/PGND2 | Power ground returns | Dual PGND pins isolate high-current return paths and improve thermal dissipation |
| CBOOT | Bootstrap supply | Connects 100nF capacitor between SW and CBOOT; internal diode charges bootstrap rail |
| GND | Exposed thermal pad | Internally connected to ground; must be soldered to PCB ground plane with multiple thermal vias |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for engine bay and dashboard mounting |
| MINT 1 noise mitigation | Combines spread-spectrum modulation, symmetrical pinout, and Enhanced HotRod™ packaging to meet CISPR 25 Class 5 EMI limits |
| Soft recovery from dropout | Eliminates output overshoot during input brownout - prevents downstream logic upset in safety-critical systems |
| Wettable-flank QFN (RYF) | Enables 100% automated visual solder inspection - reduces manufacturing defect escape in automotive production |
| Functional safety documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage data - accelerates ISO 26262 ASIL-B system certification |
| Low-noise PFM mode | 7µA no-load IQ with frequency foldback - maintains high efficiency below 100mA load without audible switching noise |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers SoC, DDR memory, and display interface in centralized vehicle head unit with CAN/FlexRay connectivity. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator supplying core logic and I/O rails; operates at 2.1MHz to avoid AM radio interference. Use Value: Spread-spectrum modulation and symmetrical pinout reduce conducted EMI by >15dB, eliminating need for additional filtering components. | Use Scenario: Supplies image sensor and ISP in front-facing ADAS camera module mounted behind windshield. IC Role / Device Role / Timing Role: High-efficiency 3.3V/1.8V dual-rail source with 7µA quiescent current enabling always-on vision processing during vehicle sleep mode. Use Value: Wettable-flank RYF package ensures solder joint reliability under thermal cycling; 150°C junction rating supports operation near heated glass. |
| Automotive Body Control Module | USB-C Charging Port Regulator |
Use Scenario: Provides regulated 5V/12V outputs for door module actuators, LED lighting, and LIN transceivers in body electronics ECU. IC Role / Device Role / Timing Role: Main buck converter handling load-dump transients up to 42V; uses FPWM mode for consistent timing in real-time control loops. Use Value: Dual VIN/PGND inputs and parallel SW pins minimize input ripple and thermal stress during 100A cranking pulses. | Use Scenario: Delivers 5V/3A USB Power Delivery output from 12V vehicle battery in center console charging hub. IC Role / Device Role / Timing Role: Adjustable-output buck stage preceding USB PD controller; configured for 5V ±1% accuracy across temperature. Use Value: 1% FB reference and soft-dropout recovery prevent USB enumeration failures during cold-cranking voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM63440AASQRYFRQ1 | 4A output current, identical pinout and feature set except lower current rating and reduced high-side current limit (7A vs. 10.3A) | Suitable for lower-power infotainment modules or auxiliary rails where 6A headroom is unnecessary | Select when system load is ≤4A and cost optimization is prioritized over future-proofing |
| LM64460APPQRYFRQ1 | Fixed 2.1MHz frequency (no RT pin), pin-selectable spread-spectrum and light-load mode, tri-temperature test grade | Targeted at production programs requiring guaranteed frequency stability and extended test coverage for zero-defect manufacturing | Choose when fixed-frequency operation simplifies EMI compliance testing and tri-temp validation is mandated |
Compared with LM63440AASQRYFRQ1, LM63460AASQRYFRQ1 provides higher current headroom and thermal margin for demanding ADAS loads; compared with LM64460APPQRYFRQ1, it offers design flexibility via adjustable frequency and AUTO light-load mode but requires external RT resistor and layout tuning for EMI.
Availability
LM63460AASQRYFRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM63460AASQRYFRQ1 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.
LM63460AASQRYFRQ1 belongs to the LM634x0-Q1 family of automotive synchronous buck converters designed specifically for high-reliability, low-EMI power delivery in ADAS, infotainment, and body electronics systems.
FAQ
What is the maximum input voltage transient rating for LM63460AASQRYFRQ1?
The LM63460AASQRYFRQ1 supports input transients up to 42V, making it compatible with automotive load-dump conditions defined in ISO 7637-2 Pulse 5a. This rating is validated across the full operating temperature range and allows direct connection to the vehicle battery without external TVS clamping in most implementations. The absolute maximum VIN rating remains 42V, and operation beyond this risks permanent damage to the internal MOSFETs and control circuitry of the LM63460AASQRYFRQ1.
Does LM63460AASQRYFRQ1 support both PFM and FPWM light-load modes?
Yes, LM63460AASQRYFRQ1 supports AUTO mode (default), which automatically transitions between PWM and PFM based on load, and FPWM mode, which forces continuous switching regardless of load. FPWM is enabled either by pulling EN/SYNC high above 2.4V or by applying an external sync signal. In AUTO mode, LM63460AASQRYFRQ1 achieves 7µA typical no-load quiescent current; in FPWM mode, minimum off-time control maintains fixed frequency but increases light-load IQ. Both modes are fully supported across the entire 200kHz–2.2MHz frequency range of the LM63460AASQRYFRQ1.
What package type and pin count does LM63460AASQRYFRQ1 use?
LM63460AASQRYFRQ1 uses a 22-pin Enhanced HotRod™ QFN package designated RYF, featuring wettable flanks for automated optical inspection and optimized pin spacing to improve short-circuit-to-adjacent-pin FMEA scores. The RYF package has an exposed thermal pad (GND) and integrates four SW pins (SW1–SW4), dual VIN inputs (VIN1/VIN2), and dual PGND returns (PGND1/PGND2) to reduce parasitic inductance. This mechanical configuration is shared across the LM634x0-Q1 family and is documented in TI's SNVSBW1E datasheet revision July 2026 for LM63460AASQRYFRQ1.
How is output voltage adjusted on LM63460AASQRYFRQ1?
LM63460AASQRYFRQ1 uses resistor-divider feedback on the FB pin to set adjustable output voltage from 1V to 95% of VIN, with ±1% initial accuracy over temperature. A 1V internal reference connects to FB, so VOUT = 1V × (1 + RFBT/RFBB). For example, a 100kΩ top resistor (RFBT) and 24.9kΩ bottom resistor (RFBB) yields 5.02V output. The FB pin draws only 1–50nA, minimizing divider current error. This configuration is validated for all operating conditions specified in the LM63460AASQRYFRQ1 datasheet, including load transients and temperature extremes from –40°C to +125°C.
Is LM63460AASQRYFRQ1 qualified for functional safety applications?
Yes, LM63460AASQRYFRQ1 is functional safety-capable with documentation available to support ISO 26262 ASIL-B system development, including FIT rate calculation, failure mode analysis, and diagnostic coverage data. It features integrated diagnostics such as PGOOD monitoring, thermal shutdown (158–180°C trip), and current limiting (high-side: 8.9–11.5A, low-side: 6.1–8.1A), all validated per AEC-Q100 Grade 1. Texas Instruments provides safety manuals and FMEDA reports specifically for LM63460AASQRYFRQ1 to accelerate automotive safety case development without requiring external monitoring circuits.
LM63460AASQRYFRQ1 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:
- 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:
- 22-VQFN-HR (3.5x4)
LM63460AASQRYFRQ1 FAQ
1.How can I place an order for LM63460AASQRYFRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM63460AASQRYFRQ1 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 LM63460AASQRYFRQ1 reliable?
The price and inventory of LM63460AASQRYFRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM63460AASQRYFRQ1 is usually 5 days.
3.What payment methods are accepted for LM63460AASQRYFRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM63460AASQRYFRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM63460AASQRYFRQ1?
LM63460AASQRYFRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM63460AASQRYFRQ1 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 LM63460AASQRYFRQ1?
For technical support, including LM63460AASQRYFRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM63460AASQRYFRQ1 requirements.
6.How does Aetrix verify that LM63460AASQRYFRQ1 is sourced from the original manufacturer or authorized distributors?
All LM63460AASQRYFRQ1 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 LM63460AASQRYFRQ1 meets industry standards.
7.What is the process for return or replacement of LM63460AASQRYFRQ1?
All LM63460AASQRYFRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM63460AASQRYFRQ1, 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 LM63460AASQRYFRQ1 part is unused and in its original packaging.
Return procedure for LM63460AASQRYFRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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