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Texas Instruments LM62440CPPQRJRRQ1
- Part No.:
- LM62440CPPQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM62440CPPQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 4A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,535
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Product details
Overview
LM62440CPPQRJRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC-DC converter delivering up to 4 A output current across 3 V–36 V input, with factory-trimmed 5-V fixed output, ±1% total regulation accuracy, and 42-V load dump tolerance. It serves as a primary power supply for infotainment head units and ADAS domain controllers requiring low EMI and high reliability.
For engineers reviewing the LM62440CPPQRJRRQ1 datasheet, LM62440CPPQRJRRQ1 pinout, LM62440CPPQRJRRQ1 application, or LM62440CPPQRJRRQ1 equivalent, key selection criteria include its 2.1-MHz fixed switching frequency, HotRod™ VQFN-HR package with wettable flanks, spread spectrum and adjustable SW rise time for EMI reduction, and functional safety documentation support.
Technical Context
The LM62440CPPQRJRRQ1 integrates high-side and low-side MOSFETs (RDS(on) = 41 mΩ / 21 mΩ) and implements soft recovery from dropout to eliminate output overshoot. Its dual VIN pins (VIN1/VIN2) and parallel input path reduce parasitic inductance, while the RBOOT/CBOOT interface enables precise control of switch-node rise time (2.15 ns to 2.7 ns).
It supports Auto mode (PFM/PWM seamless transition), FPWM mode via MODE/SYNC pin, and external synchronization from 200 kHz to 2.2 MHz. The device uses a precision 1-V internal reference with feedback accuracy of ±1%, and features integrated thermal shutdown (168°C trip) and hiccup-mode overcurrent protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V; supports 42-V automotive load dump for 400 ms without damage. |
| Output Voltage | Fixed 5 V (±1% accuracy); no external resistor divider required. |
| Switching Frequency | Factory-set 2.1 MHz; enables compact magnetics and avoids AM-band interference. |
| Max Output Current | 4 A continuous; derated above 125°C junction temperature per thermal design. |
| Quiescent Current | 7 µA at no load (13.5 VIN, 3.3 VOUT); enables always-on system rail efficiency. |
| EMI Mitigation | Integrated spread spectrum (±2% deviation), adjustable SW rise time, and HotRod™ VQFN-HR package minimize peak conducted emissions. |
| Package | VQFN-HR (14-pin, 4.0 mm × 3.5 mm) with wettable flanks for automated optical inspection (AOI) and robust solder joint reliability. |
Pinout & Package
VQFN-HR (14-pin) package with 4.00 mm × 3.50 mm body size and wettable flanks for automotive-grade solder joint inspection and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS (1) | Internal LDO bias input | Connect to output voltage to improve light-load efficiency; tie to GND if VOUT > 12 V. |
| VCC (2) | Internal LDO output | Supplies internal control circuitry; requires 1-µF capacitor to AGND; no external loading permitted. |
| AGND (3) | Analog ground reference | Reference point for FB and VCC; must be connected to both PGND1 and PGND2 on PCB. |
| FB (4) | Feedback input | Internally connected to 5-V trim network; no external divider needed for fixed-output operation. |
| PGOOD (5) | Open-drain power-good indicator | Asserts high when output is within ±7% of 5 V; pulls low during EN deactivation or fault. |
| MODE/SYNC (6) | Mode selection & sync input | Selects Auto/FPWM mode or external clock sync; controls spread spectrum enable/disable via voltage threshold. |
| EN (7) | Enable input | Active-high precision enable with 1.263 V threshold and 24% hysteresis; supports adjustable UVLO. |
| VIN1 (8), VIN2 (12) | Dual input power rails | Parallel input paths reduce loop inductance; each requires local high-quality bypass capacitors to respective PGND. |
| PGND1 (9), PGND2 (11) | Power ground returns | Low-impedance return paths for internal low-side MOSFET; must be tied together near device footprint. |
| SW (10) | Switch node | Drives external output inductor; connects to CBOOT via internal diode and external 100-nF bootstrap capacitor. |
| RBOOT (13) | Bootstrap timing resistor | Adjusts SW node rise time (2.15–2.7 ns); 0 Ω to open connection supported. |
| CBOOT (14) | Bootstrap capacitor connection | Connects 100-nF capacitor between SW and CBOOT; supplies gate drive for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for –40°C to +150°C junction temperature; qualified for under-hood and infotainment applications. |
| Functional Safety Documentation | Includes FIT rate, failure mode analysis, and diagnostic coverage data to accelerate ISO 26262 ASIL-B system integration. |
| Ultra-low EMI architecture | HotRod™ package minimizes switch-node ringing; spread spectrum reduces peak emissions by >10 dBµV. |
| Scalable pin compatibility | Shares footprint and pinout with LM61440-Q1 (4 A), LM61460-Q1 (6 A), and LMQ62440-Q1 (integrated caps). |
| Light-load efficiency optimization | Auto mode enables frequency foldback; achieves 73% efficiency at 100 µA load (5 VOUT, 2.1 MHz). |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and USB-C PD controller in automotive head units operating from 12-V battery with transient load dump events. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering stable, low-noise power with fast transient response and hiccup-mode overload protection. Use Value: Eliminates need for external EMI filters due to integrated spread spectrum and optimized layout; supports 42-V load dump per ISO 7637-2 Pulse 5a. |
Use Scenario: Supplies image sensor, ISP, and MIPI serializer in front-facing ADAS cameras exposed to wide ambient temperature swings. IC Role / Device Role / Timing Role: High-reliability 5-V power source with thermal shutdown (168°C) and ±1% output accuracy over –40°C to +125°C ambient. Use Value: Enables single-layer PCB design with minimal external components; wettable flanks ensure AOI-compatible solder joints for zero-defect manufacturing. |
| Body Control Module Rail | Telematics Gateway Core Supply |
|
Use Scenario: Generates 5-V rail for microcontroller, CAN transceivers, and LIN interface in centralized body electronics modules. IC Role / Device Role / Timing Role: Efficient, low-quiescent-current (7 µA) buck converter supporting always-on functionality with wake-up via EN pin. Use Value: Reduces standby power consumption by >50% vs. legacy 36-V buck converters; precision enable allows programmable UVLO for battery monitoring. |
Use Scenario: Provides clean 5-V core supply for cellular modem, GNSS receiver, and Ethernet PHY in vehicle telematics gateways. IC Role / Device Role / Timing Role: Low-EMI synchronous buck with 2.1-MHz switching enabling small 1.0-µH inductors and <1000-µF output capacitance. Use Value: Meets CISPR 25 Class 5 conducted EMI limits without ferrite beads or shielding; simplifies EMC validation cycle. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61440CPPQRJRRQ1 | Same 5-V fixed output and 2.1-MHz frequency, but rated for 36-V max input (not 42-V tolerant). | Lacks 42-V load dump support; unsuitable for direct replacement in systems requiring ISO 7637-2 compliance. | Select LM62440CPPQRJRRQ1 when 42-V transient immunity is mandatory; LM61440CPPQRJRRQ1 only where input clamping is externally implemented. |
| LM62440BPPQRJRRQ1 | Identical package, pinout, and 2.1-MHz frequency, but factory-trimmed to 3.3-V output. | Requires redesign of downstream logic voltage levels; not drop-in for 5-V systems. | Choose LM62440BPPQRJRRQ1 only when migrating to 3.3-V core rails; LM62440CPPQRJRRQ1 remains optimal for existing 5-V architectures. |
Compared with LM61440CPPQRJRRQ1, LM62440CPPQRJRRQ1 adds 42-V load dump capability and enhanced thermal robustness; compared with LM62440BPPQRJRRQ1, it delivers higher output voltage for legacy 5-V peripherals without level-shifting overhead.
Availability
LM62440CPPQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control unit designs requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for LM62440CPPQRJRRQ1 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 ICs, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The LM62440-Q1 product line delivers high-efficiency, low-EMI DC-DC converters engineered specifically for automotive power systems demanding AEC-Q100 Grade 1 reliability, functional safety readiness, and scalable platform design.
FAQ
What is the maximum input voltage rating for LM62440CPPQRJRRQ1, and how does it handle automotive transients?
The LM62440CPPQRJRRQ1 supports absolute maximum input voltage of 42 V, enabling direct connection to 12-V automotive batteries during load dump events per ISO 7637-2 Pulse 5a. Its internal protection circuits maintain regulation and avoid latch-up or damage during 400-ms 42-V transients, eliminating need for external TVS clamping in many designs.
Does LM62440CPPQRJRRQ1 require external feedback resistors for its 5-V output?
No, LM62440CPPQRJRRQ1 is factory-trimmed to deliver a precise 5-V output with ±1% total regulation accuracy. The FB pin is internally connected to the 5-V reference network, so no external resistor divider is required-reducing BOM count, layout area, and calibration uncertainty.
How does the MODE/SYNC pin configure operation modes on LM62440CPPQRJRRQ1?
The MODE/SYNC pin on LM62440CPPQRJRRQ1 selects Auto mode (default, PFM/PWM auto-transition), FPWM mode (constant frequency at light loads), or external clock synchronization (200 kHz–2.2 MHz). Spread spectrum is enabled/disabled via voltage thresholds (2.5 V / 4.9 V), and resistance-based configuration (6 kΩ / 30 kΩ) sets EMI behavior without firmware.
What thermal performance can be expected from LM62440CPPQRJRRQ1 in a typical 4-layer PCB layout?
In a standard 4-layer JEDEC board, LM62440CPPQRJRRQ1 achieves RθJA = 25°C/W. With proper copper pour and thermal vias under the exposed pad, it sustains 4-A continuous output at +85°C ambient without derating. Thermal shutdown activates at 168°C (±10°C hysteresis), ensuring safe operation under overload or airflow loss.
Is LM62440CPPQRJRRQ1 pin-compatible with other devices in the LM6x440-Q1 family?
Yes, LM62440CPPQRJRRQ1 shares identical VQFN-HR (14-pin) package, pinout, and footprint with LM61440-Q1, LM61460-Q1, and LMQ62440-Q1. This enables scalable power design-e.g., upgrading from 4 A to 6 A by swapping to LM61460CPPQRJRRQ1 without PCB revision.
LM62440CPPQRJRRQ1 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:
- 4A
- 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)
LM62440CPPQRJRRQ1 FAQ
1.How can I place an order for LM62440CPPQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM62440CPPQRJRRQ1 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 LM62440CPPQRJRRQ1 reliable?
The price and inventory of LM62440CPPQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM62440CPPQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM62440CPPQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM62440CPPQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM62440CPPQRJRRQ1?
LM62440CPPQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM62440CPPQRJRRQ1 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 LM62440CPPQRJRRQ1?
For technical support, including LM62440CPPQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM62440CPPQRJRRQ1 requirements.
6.How does Aetrix verify that LM62440CPPQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM62440CPPQRJRRQ1 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 LM62440CPPQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM62440CPPQRJRRQ1?
All LM62440CPPQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM62440CPPQRJRRQ1, 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 LM62440CPPQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM62440CPPQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM62440CPPQRJRRQ1 Tags
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