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Texas Instruments LM61460AASQRJRRQ1
- Part No.:
- LM61460AASQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM61460AASQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 6A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,957
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Product details
Overview
LM61460AASQRJRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC-DC converter delivering up to 6 A output current across 3 V–36 V input, with ±1% output regulation accuracy, 42-V load dump tolerance, and spread-spectrum EMI reduction-designed for infotainment head units and ADAS power rails.
For engineers reviewing the LM61460AASQRJRRQ1 datasheet, LM61460AASQRJRRQ1 pinout, LM61460AASQRJRRQ1 application, or LM61460AASQRJRRQ1 equivalent, key selection criteria include adjustable 200 kHz–2.2 MHz switching frequency, Auto-mode light-load efficiency (7 µA no-load IQ), VQFN-HR 4.0 mm × 3.5 mm package with wettable flanks, and integrated high-side/low-side MOSFETs with 41 mΩ/21 mΩ RDS(ON).
Technical Context
The LM61460AASQRJRRQ1 implements peak-current mode control with pseudo-random spread spectrum and user-adjustable SW node rise time via RBOOT resistor. Its dual VIN pins (VIN1/VIN2) and parallel input path reduce parasitic inductance, while HotRod™ packaging minimizes switch-node ringing to meet CISPR-25 Class 5 conducted emissions limits.
It supports synchronization (200 kHz–2.2 MHz), soft recovery from dropout, and seamless PWM/PFM transition. The device features precision enable with UVLO hysteresis (24–32%), internal LDO (VCC = 3.3 V), and BIAS pin for external bias supply to improve efficiency at high VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V operating; withstands 42 V transient-enables direct connection to automotive battery without pre-regulator |
| Output Current | Up to 6 A continuous-supports high-power infotainment SoCs and radar modules |
| Output Regulation Accuracy | ±1% total over line/load/temperature-ensures stable core voltage for safety-critical processors |
| Switching Frequency | Adjustable 200 kHz to 2.2 MHz via RT resistor or SYNC pin-avoids AM band interference and enables compact magnetics |
| No-Load Quiescent Current | 7 µA typical at 13.5 VIN/3.3 VOUT in Auto-mode-extends battery life in always-on vehicle systems |
| EMI Reduction Features | Spread spectrum (±2% center frequency deviation), adjustable SW rise time, HotRod™ VQFN-HR package-eliminates need for shielding in ECU designs |
| Thermal Performance | RθJA = 25 °C/W on EVM (4-layer board)-supports 6 A operation at +105 °C ambient without forced airflow |
| AEC-Q100 Qualification | Grade 1 (–40 °C to +150 °C TJ)-certified for engine bay and dashboard-mounted automotive applications |
Pinout & Package
VQFN-HR (14-pin) package, 4.00 mm × 3.50 mm body size, wettable flanks for automated optical inspection (AOI) and solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS | Internal LDO input | Connect to VOUT (or ground if VOUT > 12 V) to improve efficiency; decoupling capacitor required for noise immunity |
| VCC | Internal LDO output | 3.3 V supply for control circuitry; must be decoupled with 1-µF capacitor to AGND-no external loading permitted |
| AGND | Analog reference ground | Reference point for FB and VCC; must be low-impedance connected to both PGND1 and PGND2 |
| FB | Feedback input | Connects to resistor divider tap; sets output voltage from 1 V to 95% of VIN; 10 nA input bias enables high-impedance dividers |
| PGOOD | Open-drain status output | Indicates regulation within ±3% window; requires external pull-up; asserts low during EN deactivation or fault |
| RT | Frequency setting input | Resistor-to-ground (5.76 kΩ–66.5 kΩ) sets fSW from 200 kHz to 2.2 MHz; enables precise noise band avoidance |
| EN/SYNC | Enable & sync input | Logic-level enable with 1.263 V threshold and 24–32% hysteresis; also accepts AC-coupled external clock for forced PWM |
| VIN1 / VIN2 | Dual input power pins | Parallel paths minimize input loop inductance; each requires local high-quality bypass capacitors to respective PGND |
| PGND1 / PGND2 | Power ground returns | Separate low-side MOSFET grounds; must be tied together with low-inductance PCB trace near IC |
| SW | Switch node | Connects to output inductor; high dV/dt node requiring tight layout; CBOOT capacitor referenced to this pin |
| RBOOT | Rise-time control | Resistor between RBOOT and CBOOT adjusts SW node rise time (2.15 ns to 2.7 ns), reducing EMI peaks |
| CBOOT | Bootstrap supply rail | 100-nF capacitor between CBOOT and SW powers high-side gate driver; internal diode charges it from VCC |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40 °C to +150 °C TJ)-validates reliability for under-hood and instrument cluster deployment |
| Ultra-low EMI architecture | HotRod™ package + parallel VIN paths + spread spectrum + adjustable SW rise time-meets CISPR-25 Class 5 without ferrite beads or metal shields |
| Light-load efficiency | Auto-mode frequency foldback achieves 7 µA no-load IQ and 83% PFM efficiency at 1 mA-critical for always-on telematics modules |
| Robust input surge handling | 42-V absolute maximum rating and soft-dropout recovery-tolerates ISO 7637-2 pulse 5a load dump without external TVS |
| Scalable pin compatibility | Same footprint as LM61440-Q1 (4 A) and LM62440-Q1 (4 A fixed-fSW)-enables power-tiering across vehicle platforms with minimal PCB redesign |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration-including FIT rate, failure modes, and diagnostic coverage analysis |
Applications
| Infotainment Head Unit Power | ADAS Radar Module Supply |
|---|---|
Use Scenario: Powers SoC, DDR memory, and display interface in automotive head unit with strict EMI limits and cold-crank operation. IC Role / Device Role / Timing Role: Primary 5 V/3.3 V buck regulator supplying processor core and I/O rails; operates at 2.1 MHz to avoid AM band interference. Use Value: ±1% regulation accuracy maintains SoC stability during battery transients; 7 µA quiescent current extends parking mode duration. | Use Scenario: Supplies 1.2 V core and 3.3 V analog rails for 77 GHz radar transceivers in forward collision warning systems. IC Role / Device Role / Timing Role: High-efficiency, low-noise intermediate converter stepping down from 12 V battery to clean 3.3 V for RF front-end biasing. Use Value: Spread spectrum and adjustable SW rise time suppress conducted emissions below CISPR-25 Class 5 limits-eliminating shielded enclosures. |
| Body Control Module (BCM) | USB-C In-Car Charging |
Use Scenario: Delivers regulated 5 V/3.3 V to microcontrollers, CAN transceivers, and sensor interfaces in door modules and lighting controllers. IC Role / Device Role / Timing Role: Main power source for ASIL-B compliant BCMs; uses EN/SYNC for coordinated power sequencing with other ECUs. Use Value: AEC-Q100 Grade 1 qualification ensures 15-year lifetime at 150 °C junction temperature; dual VIN pins reduce input ripple current stress. | Use Scenario: Provides 5 V/3 A USB Power Delivery output in center console, supporting fast charging of smartphones and tablets. IC Role / Device Role / Timing Role: Pre-regulator feeding USB PD controller; configured for 400 kHz switching to maximize efficiency at medium loads. Use Value: 0.4 V dropout at 4 A enables full USB-C spec compliance down to 6.5 V battery voltage during cold crank. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61440AANQRJRRQ1 | 4 A output current; no spread spectrum; same 200 kHz–2.2 MHz fSW adjustability and VQFN-HR package | Suitable for lower-power infotainment modules where EMI margin is less constrained | Select when peak current demand ≤ 4 A and CISPR-25 Class 5 compliance is not required |
| LMQ61460QRHFRQ1 | 6 A output with integrated input/output capacitors; fixed 2.1 MHz fSW; QFN-28 package (5 mm × 4 mm) | Targeted at space-constrained ADAS cameras where solution size is prioritized over layout flexibility | Select when board area is critical and fixed-frequency operation suffices for EMI management |
Compared with LM61440AANQRJRRQ1 and LMQ61460QRHFRQ1, the LM61460AASQRJRRQ1 uniquely combines 6-A capability, spread-spectrum EMI suppression, and adjustable frequency in a 4.0 mm × 3.5 mm footprint-making it optimal for scalable, high-reliability automotive power designs requiring both performance and regulatory compliance.
Availability
LM61460AASQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS sensor power, and body electronics applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LM61460AASQRJRRQ1 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.
The LM61460-Q1 product line delivers high-efficiency, low-EMI synchronous buck converters engineered specifically for automotive power rails-from infotainment and digital clusters to radar and ADAS sensors-where reliability, thermal robustness, and regulatory compliance are non-negotiable.
FAQ
What is the maximum input voltage the LM61460AASQRJRRQ1 can withstand during load dump events?
The LM61460AASQRJRRQ1 has an absolute maximum input voltage rating of 42 V, enabling direct connection to automotive battery systems without external TVS protection during ISO 7637-2 Pulse 5a load dump events. This rating is validated across its full operating temperature range (–40 °C to +150 °C junction), making LM61460AASQRJRRQ1 suitable for under-hood applications where transient surges exceed standard 36 V operating limits.
Does the LM61460AASQRJRRQ1 support synchronization to an external clock, and what are the timing requirements?
Yes, the LM61460AASQRJRRQ1 supports external clock synchronization via the EN/SYNC pin, which accepts rising-edge-triggered signals between 200 kHz and 2.2 MHz. The sync signal must have rise/fall times under 30 ns and edge height ≥2.4 V. When synchronized, the device operates in forced PWM mode and disables Auto-mode frequency foldback-ensuring deterministic switching for noise-sensitive systems like radar or audio subsystems.
How does the spread spectrum feature of the LM61460AASQRJRRQ1 reduce EMI, and is it configurable?
The LM61460AASQRJRRQ1 implements pseudo-random spread spectrum with ±2% frequency deviation around the center switching frequency, reducing peak conducted and radiated emissions by distributing energy across a wider bandwidth. This feature is enabled by default in the LM61460AASQRJRRQ1 variant and cannot be disabled-it is integral to meeting CISPR-25 Class 5 compliance without additional filtering components.
What is the purpose of the RBOOT pin on the LM61460AASQRJRRQ1, and how does it affect performance?
The RBOOT pin on the LM61460AASQRJRRQ1 allows adjustment of the SW node rise time by placing a resistor between RBOOT and CBOOT. With RBOOT = 0 Ω, tRISE is 2.15 ns (10% to 80%); with RBOOT = 100 Ω, it increases to 2.7 ns. Slower rise time reduces high-frequency EMI harmonics but slightly increases switching losses-enabling fine-tuned trade-offs between EMI compliance and efficiency in final layout validation.
Can the LM61460AASQRJRRQ1 operate with an output voltage lower than 1 V, and what is the minimum adjustable output?
No, the LM61460AASQRJRRQ1 specifies a minimum output voltage of 1 V for adjustable configurations, as defined in its recommended operating conditions. The feedback reference voltage is 1.0 V (±1%), and the device is not characterized or guaranteed to regulate stably below this threshold. Attempting sub-1-V operation may result in loss of regulation accuracy, increased output ripple, or failure to maintain PGOOD assertion.
LM61460AASQRJRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-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:
- 6A
- Frequency - Switching:
- 200kHz ~ 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:
- 14-VQFN-HR (4x3.5)
LM61460AASQRJRRQ1 FAQ
1.How can I place an order for LM61460AASQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61460AASQRJRRQ1 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 LM61460AASQRJRRQ1 reliable?
The price and inventory of LM61460AASQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61460AASQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM61460AASQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61460AASQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61460AASQRJRRQ1?
LM61460AASQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61460AASQRJRRQ1 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 LM61460AASQRJRRQ1?
For technical support, including LM61460AASQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61460AASQRJRRQ1 requirements.
6.How does Aetrix verify that LM61460AASQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM61460AASQRJRRQ1 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 LM61460AASQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM61460AASQRJRRQ1?
All LM61460AASQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM61460AASQRJRRQ1, 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 LM61460AASQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM61460AASQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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