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Texas Instruments LM61430AASQRJRRQ1
- Part No.:
- LM61430AASQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM61430AASQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,082
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Product details
Overview
LM61430AASQRJRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +150°C) synchronous step-down DC-DC converter delivering up to 3 A output current across a 3-V to 36-V input range, with 42-V surge tolerance and ±1% total output regulation accuracy. It integrates high-side and low-side MOSFETs, supports adjustable switching frequency from 200 kHz to 2.2 MHz, and features HotRod™ VQFN-HR packaging for ultra-low EMI in automotive infotainment and ADAS power rails.
For engineers reviewing the LM61430AASQRJRRQ1 datasheet, LM61430AASQRJRRQ1 pinout, LM61430AASQRJRRQ1 application, or LM61430AASQRJRRQ1 equivalent, key selection considerations include its automotive-grade thermal performance, adjustable SW node rise time for EMI control, Auto mode enabling 7-µA no-load quiescent current, and compatibility with scalable 3.5-A/4-A/6-A pin-compatible family members.
Technical Context
The LM61430AASQRJRRQ1 implements peak-current-mode control with soft recovery from dropout and seamless PWM-to-PFM transition. Its dual VIN pins (VIN1/VIN2) and parallel input path minimize parasitic inductance, while RBOOT-adjustable SW node rise time (2.15 ns to 2.7 ns) and HotRod™ package reduce switch-node ringing.
It supports functional safety system design with documented safety analysis, operates in AUTO mode for frequency foldback at light loads, and includes integrated thermal shutdown (158°C–180°C), hiccup-mode overcurrent protection, and precision enable with 24–32% hysteresis for robust UVLO sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V operating; tolerant to 42 V surges - eliminates need for external TVS in automotive load-dump scenarios. |
| Output Current | Up to 3 A continuous - supports head unit, display, and USB charging rails without external current boosting. |
| Output Regulation Accuracy | ±1% total - ensures stable voltage for sensitive SoCs and sensors in cluster and ADAS modules. |
| Quiescent Current | 7 µA in Auto mode at no load - enables always-on functionality in battery-backed automotive systems. |
| Switching Frequency | Adjustable 200 kHz to 2.2 MHz via RT resistor or SYNC pin - allows AM-band avoidance and compact magnetics selection. |
| Thermal Rating | Junction temperature range –40°C to +150°C - qualified for under-hood and engine-compartment proximity applications. |
| EMI Optimization | HotRod™ VQFN-HR package + parallel VIN paths + adjustable SW rise time - reduces conducted emissions without shielding or ferrites. |
Pinout & Package
LM61430AASQRJRRQ1 uses the VQFN-HR (14-pin) package, 4.00 mm × 3.50 mm body size, with exposed thermal pad for enhanced PCB heat dissipation. The package features HotRod™ construction to minimize switch-node ringing and optimize EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS | Internal LDO bias input | Connects to output rail to improve efficiency; capacitor to AGND enhances noise immunity; tie to GND if VOUT > 12 V. |
| VCC | Internal LDO output | Supplies internal control circuitry; requires 1-µF capacitor to AGND; not for external loading. |
| AGND | Analog ground reference | Reference point for FB and VCC; must be connected to both PGND1 and PGND2 on PCB. |
| FB | Feedback voltage input | Connects to resistive divider tap; sets output from 1 V to 95% of VIN; high-impedance (10 nA input current). |
| PGOOD | Open-drain power-good status | Indicates regulation status; pulls low during fault or EN = low; requires external pull-up resistor. |
| RT | Frequency setting/synchronization | Resistor to GND sets fSW (200–2200 kHz); also accepts external clock for synchronization. |
| EN/SYNC | Enable and sync input | Logic-high enables operation; rising edge synchronizes switching; blanking time prevents false triggering. |
| VIN1 / VIN2 | Dual input supply inputs | Parallel paths reduce input loop inductance; each requires local high-quality bypass capacitors to respective PGND. |
| PGND1 / PGND2 | Power ground terminals | Low-side MOSFET return paths; must be low-impedance and joined to AGND at single point. |
| SW | Switch node | Connects to output inductor; high dv/dt node requiring careful layout; CBOOT capacitor ties here. |
| RBOOT / CBOOT | Bootstrap timing control | RBOOT resistor adjusts SW rise time; CBOOT is 100-nF capacitor between SW and CBOOT for high-side gate drive. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40°C to +150°C junction temperature - meets stringent reliability requirements for infotainment and ADAS. |
| Adjustable SW node rise time | RBOOT resistor tunes rise time from 2.15 ns to 2.7 ns - directly controls EMI spectral content and reduces need for filtering. |
| Auto mode with frequency foldback | Reduces switching frequency at light loads to maintain high efficiency - achieves 7 µA no-load IQ and eliminates audible noise. |
| Integrated PGOOD with hysteresis | Monitors output within ±3% to ±6% window (PGDUV/PGDOV) - replaces external supervisor IC in most automotive power rails. |
| 42-V surge tolerance | Withstands automotive load dump without external clamping - simplifies front-end protection design and reduces BOM count. |
Applications
| Automotive Head Unit Power Supply | ADAS Camera Module Rail |
|---|---|
Use Scenario: Powers SoC, audio codec, and display interface in centralized infotainment head units with 12-V battery input and strict EMI limits. IC Role / Device Role / Timing Role: Primary 3.3-V/5-V buck regulator delivering regulated power with soft-start and PGOOD signaling for system boot sequencing. Use Value: Ultra-low EMI design avoids costly metal shielding; 7-µA quiescent current extends battery life during vehicle sleep mode. | Use Scenario: Supplies image sensor and ISP in forward-facing ADAS cameras mounted near engine compartments. IC Role / Device Role / Timing Role: High-reliability 5-V buck converter operating across –40°C to +125°C ambient with 42-V surge immunity. Use Value: AEC-Q100 Grade 1 rating and 150°C max junction temperature ensure uninterrupted operation under hood thermal stress. |
| USB-C Charging Port | Automotive Cluster Display Backlight |
Use Scenario: Generates 9-V or 12-V intermediate bus for USB PD controller and GaN FET driver in vehicle-mounted charging ports. IC Role / Device Role / Timing Role: Adjustable-output buck stage supporting wide VIN range and precise voltage setting via FB divider. Use Value: ±1% output accuracy maintains USB PD compliance; 2.2-MHz capability enables compact 1.0-µH inductor selection. | Use Scenario: Provides stable 24-V backlight supply for TFT LCD clusters with dimming control and thermal derating. IC Role / Device Role / Timing Role: Fixed or adjustable high-voltage buck converter with thermal shutdown and hiccup-mode overcurrent protection. Use Value: Integrated 180°C thermal shutdown prevents LED driver failure; PGOOD signal enables backlight enable/disable coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61435AASQRJRRQ1 | 3.5-A rated, identical pinout and package; higher current limit and slightly higher RDS(ON) | Preferred for 3.5-A peak loads; same PCB layout but requires higher-current inductor and output capacitor | Select when output current demand exceeds 3 A but board space and thermal budget allow marginal increase in conduction loss. |
| LM61440AASQRJRRQ1 | 4-A rated, identical pinout and package; supports same frequency range and EMI features | Suitable for next-generation ADAS modules with higher SoC power envelopes; shares layout and firmware interface | Choose for future-proofing or when scaling to 4-A continuous loads without redesigning power stage layout. |
Compared with LM61430AASQRJRRQ1, LM61435AASQRJRRQ1 and LM61440AASQRJRRQ1 offer higher output current capacity while retaining identical pinout, thermal profile, and EMI optimization - enabling drop-in scalability for evolving automotive power requirements without PCB revision.
Availability
LM61430AASQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and cluster display power supplies requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM61430AASQRJRRQ1 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 power management technologies, with deep expertise in automotive-grade IC design and functional safety certification.
The LM61430-Q1 product line delivers high-efficiency, low-EMI synchronous buck converters optimized for automotive power rails where reliability, thermal robustness, and electromagnetic compatibility are critical - especially in infotainment, ADAS, and body electronics.
FAQ
What is the maximum input voltage the LM61430AASQRJRRQ1 can withstand without damage?
The LM61430AASQRJRRQ1 has an absolute maximum input voltage rating of 42 V across VIN1 and VIN2 pins relative to AGND or PGND. This 42-V tolerance enables direct connection to automotive 12-V battery systems without external transient voltage suppression for standard load-dump events per ISO 7637-2. Operation above 36 V is limited to transient conditions only; continuous operation must remain within the 3-V to 36-V recommended range.
Does the LM61430AASQRJRRQ1 support synchronization to an external clock source?
Yes, the LM61430AASQRJRRQ1 supports external clock synchronization via its EN/SYNC pin. When AC-coupled with a rising-edge clock signal between 200 kHz and 2.2 MHz, the device locks its internal oscillator to the external frequency. During synchronization, it operates in forced PWM mode and disables Auto mode's frequency foldback. The EN/SYNC pin must be held low for more than 28 µs to ensure reliable disable behavior before re-enabling.
How does the RBOOT pin affect EMI performance in the LM61430AASQRJRRQ1?
The RBOOT pin on the LM61430AASQRJRRQ1 connects to an external resistor that controls the rise time of the SW node. With RBOOT = 0 Ω, SW rise time is 2.15 ns; with RBOOT = 100 Ω, it increases to 2.7 ns. Slower rise times reduce high-frequency harmonic content in conducted and radiated EMI, allowing designers to tune EMI performance without changing layout or adding filters - a key advantage in space-constrained automotive modules.
What is the purpose of the BIAS pin on the LM61430AASQRJRRQ1, and how should it be connected?
The BIAS pin on the LM61430AASQRJRRQ1 supplies the internal LDO that powers control circuitry. When connected to the output voltage rail (VOUT), it improves conversion efficiency by reducing internal LDO dropout losses. A 0.1-µF to 1-µF capacitor must be placed between BIAS and AGND for noise immunity. If VOUT exceeds 12 V, BIAS must be tied to AGND instead to prevent overstress - this configuration is explicitly required per the datasheet to avoid damage.
Is the LM61430AASQRJRRQ1 pin-compatible with other devices in the LM614xx-Q1 family?
Yes, the LM61430AASQRJRRQ1 is pin-compatible with LM61435AASQRJRRQ1 (3.5 A), LM61440AASQRJRRQ1 (4 A), and LM61460AASQRJRRQ1 (6 A). All share identical VQFN-HR (14-pin) package dimensions, pinout, and thermal pad layout. This enables scalable power design - upgrading output current requires only changes to inductor, output capacitor, and thermal management, not PCB redesign - accelerating development across automotive platform generations.
LM61430AASQRJRRQ1 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:
- 3A
- 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:
- 14-VQFN-HR (4x3.5)
LM61430AASQRJRRQ1 FAQ
1.How can I place an order for LM61430AASQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM61430AASQRJRRQ1 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 LM61430AASQRJRRQ1 reliable?
The price and inventory of LM61430AASQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM61430AASQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM61430AASQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM61430AASQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM61430AASQRJRRQ1?
LM61430AASQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM61430AASQRJRRQ1 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 LM61430AASQRJRRQ1?
For technical support, including LM61430AASQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM61430AASQRJRRQ1 requirements.
6.How does Aetrix verify that LM61430AASQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM61430AASQRJRRQ1 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 LM61430AASQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM61430AASQRJRRQ1?
All LM61430AASQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM61430AASQRJRRQ1, 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 LM61430AASQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM61430AASQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM61430AASQRJRRQ1 Tags
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