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Texas Instruments LM61480Q3RPHRQ1
- Part No.:
- LM61480Q3RPHRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerVFQFN
- Datasheet:
-
LM61480Q3RPHRQ1.pdf
- Description:
- IC REG BUCK 3.3V 8A 16VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
LM61480Q3RPHRQ1 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 fixed 3.3 V output, 2.2 MHz switching frequency (pin-selectable), and integrated RESET with filtered delayed release. It targets power rails in ADAS camera modules requiring low EMI, high power density, and functional safety support.
For engineers reviewing the LM61480Q3RPHRQ1 datasheet, LM61480Q3RPHRQ1 pinout, LM61480Q3RPHRQ1 application, or LM61480Q3RPHRQ1 equivalent, key selection criteria include its 8 A rated current, wettable-flank 4.5 mm × 3.5 mm VQFN-HR (RPH) package, CISPR 25 Class 5 compliance, adjustable SW node rise time, and dual-mode light-load operation (PFM/FPWM).
Technical Context
The LM61480Q3RPHRQ1 implements a synchronous buck topology with integrated high-side (21 mΩ typ.) and low-side (13 mΩ typ.) MOSFETs, internal compensation, and precision voltage reference (±0.5% initial accuracy for 3.3 V output). Its control loop supports frequency foldback during dropout and automatic transition between PFM and FPWM modes based on load.
EMI reduction is achieved via pin-configurable spread spectrum (±4% typical deviation), adjustable SW node rise time via RBOOT resistor, symmetrical low-inductance pinout, and operation at 400 kHz or 2.2 MHz-both outside AM band (530–1710 kHz). Thermal shutdown triggers at 168°C (typ.) with 9°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 8 A continuous - supports high-power ADAS sensors and infotainment SoCs without external current boosting. |
| Input Voltage Range | 3 V to 36 V - sustains operation during cold-crank (down to 3.7 V start-up) and load-dump transients (42 V/100 ms). |
| Fixed Output Voltage | 3.3 V ±0.5% - tightly regulated rail for MCU I/O, SerDes interfaces, and camera ISP cores. |
| Switching Frequency | 2.2 MHz (pin-selectable) - enables compact magnetics and avoids AM band interference; adjustable 200–2200 kHz via RT pin. |
| Quiescent Current | 5 µA (auto mode, unloaded) - extends battery life in always-on vehicle domains like telematics and parking cameras. |
| Thermal Resistance | θJA = 21.6°C/W (on EVM) - validated thermal performance enables 8 A operation in 4.5 mm × 3.5 mm footprint without forced air. |
| RESET Function | Open-drain, filtered, delayed-release - provides reliable power-good signaling with 1.2–3.75 ms activation delay and 94–96.5% UV threshold. |
Pinout & Package
LM61480Q3RPHRQ1 uses a 16-pin VQFN-HR (RPH) package with wettable flanks, measuring 4.5 mm × 3.5 mm, optimized for optical solder inspection and dual-side cooling. The pinout supports low-EMI layout with symmetrical high-current paths and separated PGND1/PGND2 planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN1, VIN2 | Primary and secondary input power inputs | Dual-input configuration reduces input loop inductance; requires low-impedance parallel connection to PGND1/PGND2. |
| PGND1, PGND2 | Power ground terminals for low-side FETs | Separated grounds minimize ground bounce; must be connected with low-inductance copper pour to shared system ground. |
| SW | Switch node | Connects directly to output inductor; critical for EMI; slew rate controlled via RBOOT–CBOOT network. |
| FB | Feedback input | Direct connection to 3.3 V output (no divider); 50 nA input bias enables high-impedance sensing without loading. |
| EN | Enable input | 1.263 V threshold with 0.5 V hysteresis; supports precision UVLO implementation using external resistor divider. |
| RESET | Open-drain power-good output | Asserts low on fault or EN deactivation; requires external pull-up; 44–125 Ω on-resistance ensures clean logic-level signaling. |
| RT | Frequency setting input | Resistor-to-GND sets 2.2 MHz; resistor-to-VCC sets 400 kHz; open-circuit disables frequency programming. |
| SPSP | Spread spectrum enable | Pull to GND enables tone-corrected spread spectrum; pull to VCC disables tone correction but retains modulation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-EMI architecture | CISPR 25 Class 5 compliant on EVM; eliminates need for shielding cans or ferrite beads in most automotive layouts. |
| Dual-side cooling compatibility | PIN-to-pin compatible with LM61480T-Q1 and LM61495T-Q1; enables thermal relief via PCB copper on top and bottom layers. |
| Functional safety documentation | Available FIT data, failure mode analysis, and safety manual - accelerates ISO 26262 ASIL-B system certification. |
| Adjustable SW node rise time | RBOOT resistor (0–100 Ω) tunes dV/dt to balance EMI suppression vs. efficiency loss - no external gate driver needed. |
| Auto-mode light-load efficiency | 5 µA quiescent current at zero load; transitions seamlessly between PFM (high efficiency at <100 mA) and FPWM (low noise at full load). |
Applications
| ADAS Camera Power Supply | Automotive Infotainment Core Rail |
|---|---|
Use Scenario: Powers 3.3 V domain of 8 MP automotive camera module with real-time image processing ASIC. IC Role / Device Role / Timing Role: Primary buck regulator supplying stable 3.3 V at up to 8 A peak current during burst exposure and video streaming. Use Value: Delivers >92% efficiency at 5 A/2.2 MHz while meeting CISPR 25 Class 5 radiated emissions limits without shielded inductors. |
Use Scenario: Generates 3.3 V core voltage for infotainment head unit SoC with dynamic load ranging from 10 mA (standby) to 6 A (navigation + audio playback). IC Role / Device Role / Timing Role: High-density point-of-load regulator with auto PFM/FPWM mode switching and RESET monitoring for safe boot sequence. Use Value: Reduces BOM count by eliminating discrete reset IC and backup LDO; 5 µA quiescent current extends battery reserve time. |
| Instrument Cluster Display Backlight Driver | Telematics Control Unit (TCU) I/O Rail |
Use Scenario: Supplies 3.3 V rail to TFT display controller and touch interface in digital instrument cluster with ambient temperature range –40°C to +125°C. IC Role / Device Role / Timing Role: Automotive-grade DC/DC converter with AEC-Q100 Grade 1 qualification and thermal shutdown at 168°C. Use Value: Wettable flank RPH package enables automated optical inspection (AOI); 21.6°C/W θJA allows convection-only cooling in sealed enclosure. |
Use Scenario: Provides always-on 3.3 V supply to CAN/FlexRay transceivers, GNSS receiver, and cellular modem in TCU during vehicle sleep mode. IC Role / Device Role / Timing Role: Low-IQ buck regulator with precision enable input used as programmable UVLO for wake-up event detection. Use Value: 0.662 µA shutdown current (typ.) and 1.263 V EN threshold ensure reliable wake-on-CAN while minimizing parasitic drain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61495Q3RPHRQ1 | 10 A rated output current; higher current limit (17.3 A typ.), lower RDS-ON (21/13 mΩ same), identical pinout and features. | Suitable where future-proofing for higher load or margin-critical designs is required; same PCB layout but higher thermal derating at 8 A. | Select when 10 A capability or lower conduction loss at full load is prioritized over cost optimization at 8 A. |
| LM62460Q3RPHRQ1 | 6 A rated output current; reduced current limit (10.35 A typ.), slightly higher RDS-ON (25/18 mΩ typ.), identical pinout and features. | Better suited for lower-power domains like body control modules or gateway MCUs where 6 A suffices and cost sensitivity is higher. | Select when system load never exceeds 6 A and BOM cost reduction is critical; shares same layout and firmware interface. |
Compared with LM61495Q3RPHRQ1 and LM62460Q3RPHRQ1, the LM61480Q3RPHRQ1 delivers optimal balance of 8 A capability, thermal performance in compact RPH package, and EMI robustness - making it the preferred choice for mid-tier ADAS and infotainment power rails where neither 6 A nor 10 A variants fully match the design envelope.
Availability
LM61480Q3RPHRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and instrument cluster electronics requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LM61480Q3RPHRQ1 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 and embedded processing technologies, with deep expertise in automotive power management and functional safety solutions.
The LM6x4xx-Q1 product line was designed specifically for high-reliability automotive power conversion - emphasizing low EMI, AEC-Q100 compliance, thermal resilience, and integration to reduce system size and bill-of-materials complexity.
FAQ
What is the maximum continuous output current rating for the LM61480Q3RPHRQ1?
The LM61480Q3RPHRQ1 is rated for 8 A continuous output current under recommended operating conditions (–40°C to +125°C ambient, proper PCB layout, and thermal management). This rating is validated per TI's LM61480RPHEVM test data and accounts for internal MOSFET RDS-ON, thermal resistance (θJA = 21.6°C/W), and current-limit thresholds (13.8 A typ. high-side limit).
Does the LM61480Q3RPHRQ1 support spread spectrum modulation, and how is it configured?
Yes, the LM61480Q3RPHRQ1 supports pin-configurable spread spectrum modulation via the SPSP pin. Pulling SPSP to ground enables tone-corrected spread spectrum (±4% typical frequency deviation), reducing peak EMI emissions. Connecting SPSP to VCC disables tone correction but retains basic modulation. Floating SPSP is not allowed and may cause undefined behavior.
What package type and dimensions does the LM61480Q3RPHRQ1 use?
The LM61480Q3RPHRQ1 uses a 16-pin VQFN-HR (RPH) package measuring 4.5 mm × 3.5 mm with wettable flanks. This package supports optical solder-joint inspection, dual-side cooling, and low-inductance layout - critical for automotive EMI compliance and thermal reliability in confined spaces.
How does the RESET output function on the LM61480Q3RPHRQ1, and what are its timing characteristics?
The LM61480Q3RPHRQ1 features an open-drain RESET output with built-in filtering and delayed release. It asserts low when EN is de-asserted or FB falls below 94–96.5% of nominal output. Activation delay (tRESET_ACT) is 1.2–3.75 ms after FB stabilizes; deglitch filter (tRESET_FILTER) is 10–45 µs. RESET requires an external pull-up resistor to a valid logic supply.
Can the LM61480Q3RPHRQ1 operate with input voltages below 3.7 V, and what are the startup requirements?
The LM61480Q3RPHRQ1 requires ≥3.7 V at VIN to initiate startup, but once running, it sustains regulation down to 3.0 V input. This enables operation during automotive cold-crank events where battery voltage dips transiently. Startup is disabled below 3.7 V to ensure reliable internal LDO (VCC) and gate driver initialization.
LM61480Q3RPHRQ1 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:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- 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)
LM61480Q3RPHRQ1 FAQ
1.How can I place an order for LM61480Q3RPHRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61480Q3RPHRQ1 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 LM61480Q3RPHRQ1 reliable?
The price and inventory of LM61480Q3RPHRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61480Q3RPHRQ1 is usually 5 days.
3.What payment methods are accepted for LM61480Q3RPHRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61480Q3RPHRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61480Q3RPHRQ1?
LM61480Q3RPHRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61480Q3RPHRQ1 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 LM61480Q3RPHRQ1?
For technical support, including LM61480Q3RPHRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61480Q3RPHRQ1 requirements.
6.How does Aetrix verify that LM61480Q3RPHRQ1 is sourced from the original manufacturer or authorized distributors?
All LM61480Q3RPHRQ1 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 LM61480Q3RPHRQ1 meets industry standards.
7.What is the process for return or replacement of LM61480Q3RPHRQ1?
All LM61480Q3RPHRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM61480Q3RPHRQ1, 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 LM61480Q3RPHRQ1 part is unused and in its original packaging.
Return procedure for LM61480Q3RPHRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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