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Texas Instruments LM61480QRPHRQ1
- Part No.:
- LM61480QRPHRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerVFQFN
- Datasheet:
-
LM61480QRPHRQ1.pdf
- Description:
- IC REG BUCK ADJ 8A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,042
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Product details
Overview
LM61480QRPHRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive buck converter delivering up to 8 A output current, operating from 3 V to 36 V input, with adjustable or fixed output (1 V to 95% of VIN), and optimized for low EMI in space-constrained ADAS and infotainment systems.
For engineers reviewing the LM61480QRPHRQ1 datasheet, LM61480QRPHRQ1 pinout, LM61480QRPHRQ1 application, or LM61480QRPHRQ1 equivalent, key selection criteria include its 200 kHz–2.2 MHz adjustable switching frequency, pin-configurable spread spectrum, 4.5 mm × 3.5 mm wettable-flank QFN package, RESET output with filtered delayed release, and functional safety documentation support.
Technical Context
The LM61480QRPHRQ1 integrates a high-side and low-side MOSFET pair with RDS(on) of 21 mΩ (HS) and 13 mΩ (LS), enabling high-efficiency operation across automotive transients (up to 42 V/100 ms). Its adaptive frequency foldback maintains regulation during cranking, while dual-mode light-load control (FPWM/PFM) achieves 5 µA quiescent current in auto mode.
EMI reduction is implemented via three hardware-configurable features: adjustable SW node rise time (via RBOOT), pin-selectable spread spectrum (±4% typical Δf), and symmetrical low-inductance pinout - all validated to CISPR 25 Class 5 on evaluation modules without shielding.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 3 V to 36 V continuous; withstands 42 V transients ≤100 ms - supports automotive load dump and cold-crank conditions. |
| Output current rating | 8 A maximum continuous - matches system-level power needs for instrument clusters and ADAS domain controllers. |
| Switching frequency | Pin-selectable 400 kHz / 2.2 MHz or adjustable 200 kHz–2.2 MHz via RT resistor - enables AM-band avoidance and layout optimization. |
| Quiescent current | 5 µA in auto mode at no load - extends battery life in always-on vehicle subsystems. |
| Thermal resistance | RθJA = 21.6 °C/W on LM61495RPHEVM - enables high-power density designs with minimal heatsinking. |
| RESET output | Open-drain with 1.2–3.75 ms active delay and ±2.5% hysteresis - provides reliable system power-good signaling with built-in filtering. |
| Package | 16-pin VQFN-HR (RPH), 4.5 mm × 3.5 mm with wettable flanks - supports automated optical inspection and dual-side cooling. |
Pinout & Package
LM61480QRPHRQ1 uses a 4.5 mm × 3.5 mm, 16-pin VQFN-HR (RPH) package with wettable flanks for solder joint inspection and enhanced thermal performance via dual-side cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Power inputs | Dual high-current input paths reduce PCB trace inductance and improve EMI; must be low-impedance coupled to PGND1/PGND2. |
| PGND1, PGND2 | Power ground terminals | Separate low-side MOSFET return paths minimize ground bounce; require direct, low-inductance connection to input capacitors. |
| SW | Switch node | Connects to output inductor; slew rate controlled via RBOOT–CBOOT to reduce high-frequency EMI emissions. |
| FB | Feedback input | Monitors output voltage; supports adjustable (1 V reference) or fixed-output configurations via external divider or internal trim. |
| EN | Enable input | Precision UVLO-capable enable (1.263 V threshold, 0.5 V hysteresis); allows system-level brown-out protection and sequencing. |
| RESET | Open-drain status output | Asserts low when EN = low or FB falls below 94% of target; includes deglitching (10–45 µs) and delayed release (1.2–3.75 ms). |
| RT | Frequency set | Resistor-to-ground sets fSW from 200 kHz–2.2 MHz; tied to VCC for 400 kHz, to GND for 2.2 MHz. |
| SPSP | Spread spectrum control | Ground or resistor-to-ground enables Dual Random Spread Spectrum (DRSS); VCC disables tone correction to reduce ripple. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-configurable spread spectrum | Reduces peak EMI by spreading energy across ±4% bandwidth - eliminates need for external EMI filters in CISPR 25 Class 5 compliance. |
| Adjustable SW node rise time | Controlled via RBOOT (0–100 Ω) to tune dV/dt - balances efficiency vs. radiated emissions without sacrificing transient response. |
| Auto-mode PFM/PWM transition | Enables 5 µA no-load IQ while maintaining regulated output - removes need for auxiliary LDO in always-on domains like telematics. |
| Built-in protection suite | Includes thermal shutdown (168 °C trip), hiccup-mode overcurrent (13.8 A HS limit), and input UVLO with hysteresis - reduces external component count. |
| Wettable flank QFN package | Facilitates AOI of solder joints and improves thermal conduction to PCB - critical for automotive reliability and long-term field performance. |
Applications
| Automotive Infotainment | Instrument Cluster |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head-unit systems requiring stable 5 V or 3.3 V rails under wide input voltage swings. IC Role / Device Role / Timing Role: Primary buck regulator supplying core logic and interface power; operates in FPWM mode during video processing bursts. Use Value: 95.1% efficiency at 8 A/5 V (400 kHz) minimizes thermal stress in sealed enclosures; spread spectrum avoids interference with FM radio reception. |
Use Scenario: Delivering regulated 3.3 V to microcontroller, CAN transceivers, and TFT backlight drivers in digital dashboards. IC Role / Device Role / Timing Role: Main DC/DC converter with RESET output used for MCU reset assertion during undervoltage events. Use Value: 5 µA quiescent current extends battery runtime during vehicle sleep mode; wettable flanks ensure solder joint reliability over 15-year lifecycle. |
| ADAS Camera Module | Body Control Module (BCM) |
|
Use Scenario: Supplying 1.8 V or 1.2 V to image signal processors and high-speed SerDes links in surround-view camera ECUs. IC Role / Device Role / Timing Role: Adjustable-output buck stage preceding low-noise LDOs; configured for 2.2 MHz switching to avoid AM band. Use Value: 21.6 °C/W RθJA enables compact layout near heat-sensitive sensors; fast transient response (<1.2 ms soft-start) ensures clean power-up sequencing. |
Use Scenario: Generating 5 V for microcontroller, LIN transceivers, and sensor interfaces in centralized body electronics units. IC Role / Device Role / Timing Role: High-integration power manager with integrated current limit, thermal shutdown, and power-good signaling. Use Value: Pin-to-pin compatibility with LM61495QRPHRQ1 allows scalable design reuse across 5 A/8 A/10 A BCM variants without PCB redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61495QRPHRQ1 | 10 A rated, identical pinout and package; higher current capability with 14–20 A short-circuit limit. | Suitable for higher-power ADAS domain controllers or radar modules requiring >8 A output. | Select when system peak load exceeds 8 A or future-proofing for higher-power derivatives is required. |
| LM62460QRPHRQ1 | 6 A rated, same footprint and feature set; lower RDS(on) (18 mΩ HS / 11 mΩ LS) but reduced current capability. | Ideal for cost-optimized body electronics or gateway modules with <6 A rail requirements. | Choose for lower BOM cost where full 8 A headroom is unnecessary and thermal margin is sufficient. |
Compared with LM61495QRPHRQ1 and LM62460QRPHRQ1, the LM61480QRPHRQ1 delivers optimal balance of current capability (8 A), thermal performance (21.6 °C/W), and EMI robustness for mid-tier automotive ECUs - avoiding overdesign while ensuring scalability within the LM6x4xx-Q1 family.
Availability
LM61480QRPHRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, instrument cluster, and ADAS camera module designs requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LM61480QRPHRQ1 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 deep expertise in automotive-grade power management ICs.
The LM6x4xx-Q1 product line was designed specifically for high-density, low-EMI automotive DC/DC conversion - targeting infotainment, ADAS, and digital cockpit applications where reliability, thermal performance, and regulatory compliance are critical.
FAQ
What is the maximum input voltage transient tolerance for LM61480QRPHRQ1?
The LM61480QRPHRQ1 withstands 42 V transients at the VIN pins for durations ≤100 ms and duty cycle ≤0.01%, supporting automotive load dump conditions. Continuous operation is rated from 3 V to 36 V, with 3.7 V minimum required for startup. This transient rating is verified per AEC-Q100 stress test conditions and applies to both VIN1 and VIN2 pins simultaneously.
Does LM61480QRPHRQ1 support adjustable output voltage?
Yes, LM61480QRPHRQ1 supports adjustable output voltage from 1 V to 95% of the input voltage using an external resistor divider on the FB pin. It also offers fixed-output variants (e.g., LM61480Q3RPHRQ1 for 3.3 V), but the base LM61480QRPHRQ1 part is configured for adjustable operation with ±1% reference accuracy over temperature.
How does the RESET output of LM61480QRPHRQ1 behave during startup and fault conditions?
The LM61480QRPHRQ1 RESET output remains low until the FB voltage reaches 94% of target and stays valid for ≥1.2 ms, then releases high. It asserts low again if FB drops below 94% or EN is pulled low. The open-drain output includes internal deglitching (10–45 µs) and hysteresis (±2.5%), providing robust power-good signaling for microcontrollers in automotive environments.
Can LM61480QRPHRQ1 be synchronized to an external clock?
Yes, LM61480QRPHRQ1 supports external synchronization via the SYNC/MODE pin. When driven with a clean CMOS clock (200 kHz–2.2 MHz), it locks within 4.3 ms (typical) and maintains phase alignment. The RT pin should be configured to set the internal oscillator close to the sync frequency to prevent disturbance during clock enable/disable transitions.
What thermal metrics apply to LM61480QRPHRQ1 in real-world PCB layouts?
LM61480QRPHRQ1 achieves RθJA = 21.6 °C/W on the LM61495RPHEVM reference board - a 4-layer JEDEC-standard layout with 2 oz copper and thermal vias. On custom automotive PCBs with 2–4 oz copper, thermal vias under the exposed pad, and adequate ground plane area, RθJA typically ranges from 25–35 °C/W, enabling 8 A operation at ≤70°C ambient with no heatsink.
LM61480QRPHRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-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:
- 8A
- Frequency - Switching:
- 400kHz, 2.2MHz, 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:
- 16-VQFN-HR (4.5x3.5)
LM61480QRPHRQ1 FAQ
1.How can I place an order for LM61480QRPHRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61480QRPHRQ1 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 LM61480QRPHRQ1 reliable?
The price and inventory of LM61480QRPHRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61480QRPHRQ1 is usually 5 days.
3.What payment methods are accepted for LM61480QRPHRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61480QRPHRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61480QRPHRQ1?
LM61480QRPHRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61480QRPHRQ1 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 LM61480QRPHRQ1?
For technical support, including LM61480QRPHRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61480QRPHRQ1 requirements.
6.How does Aetrix verify that LM61480QRPHRQ1 is sourced from the original manufacturer or authorized distributors?
All LM61480QRPHRQ1 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 LM61480QRPHRQ1 meets industry standards.
7.What is the process for return or replacement of LM61480QRPHRQ1?
All LM61480QRPHRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM61480QRPHRQ1, 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 LM61480QRPHRQ1 part is unused and in its original packaging.
Return procedure for LM61480QRPHRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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