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Texas Instruments LM62440BPPQRJRRQ1
- Part No.:
- LM62440BPPQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM62440BPPQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 4A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,960
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Product details
Overview
LM62440BPPQRJRRQ1 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 3.3 V fixed output, ±1% total regulation accuracy, and 2.1-MHz switching frequency. It integrates high-side/low-side MOSFETs and supports 42-V load dump for infotainment power rails.
For engineers reviewing the LM62440BPPQRJRRQ1 datasheet, LM62440BPPQRJRRQ1 pinout, LM62440BPPQRJRRQ1 application, or LM62440BPPQRJRRQ1 equivalent, key selection criteria include ultra-low EMI performance (HotRod™ package, spread spectrum, adjustable SW rise time), functional safety documentation support, and compatibility with scalable 36-V automotive power architectures.
Technical Context
The LM62440BPPQRJRRQ1 implements a current-mode control architecture with integrated 41 mΩ high-side and 21 mΩ low-side MOSFETs, enabling high-efficiency conversion at light loads (7 µA no-load quiescent current) and full load (91% efficiency at 3.3 V/4 A, 2.1 MHz). Its dual-VIN architecture (VIN1/VIN2) and parallel input path minimize loop inductance for EMI reduction.
It features pin-selectable FPWM mode for constant-frequency operation under light loads, programmable SW node rise time via RBOOT, and MODE/SYNC pin control of spread spectrum activation, synchronization, and auto/FPWM mode selection - all operating across –40°C to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V; supports 42-V transient load dump for 400 ms - enables robust front-end power in 12-V/24-V automotive systems. |
| Output Voltage | Factory-trimmed fixed 3.3 V ±1% accuracy - eliminates external feedback resistor network, reduces BOM count and layout sensitivity. |
| Switching Frequency | 2.1 MHz nominal (±10%); enables compact solution size with small inductors and ceramic capacitors - avoids AM radio band and simplifies EMI filtering. |
| Output Current | Up to 4 A continuous; derated above 125°C - sufficient for USB-C PD, display bias, and ADAS sensor rails. |
| Quiescent Current | 7 µA at 13.5 VIN/3.3 VOUT, no load - extends battery runtime during vehicle sleep modes. |
| EMI Optimization | HotRod™ VQFN-HR package, pseudorandom spread spectrum, adjustable SW rise time, and parallel VIN paths - meets CISPR 25 Class 5 conducted emissions without shielding. |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +150°C TJ) - qualified for under-hood and infotainment module placement. |
Pinout & Package
The LM62440BPPQRJRRQ1 is housed in a 14-pin VQFN-HR (RJR) package measuring 4.00 mm × 3.50 mm with wettable flanks for automated optical inspection (AOI) and improved solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS | LDO bias input | Connects to VOUT to improve light-load efficiency; ties to GND if VOUT > 12 V - enables internal LDO optimization without external supply. |
| VCC | Internal LDO output | Powers internal control circuitry; requires 1-µF capacitor to AGND - decouples gate driver supply from noisy power paths. |
| AGND | Analog ground reference | Reference point for FB, VCC, and internal error amplifier - must be star-connected to PGND1/PGND2 to avoid noise coupling into regulation loop. |
| FB | Feedback input | Internally connected to 3.3-V reference; no external divider needed - eliminates resistor tolerance drift and thermal coefficient errors in fixed-output configuration. |
| MODE/SYNC | Mode control & sync input | Selects auto/FPWM mode, enables spread spectrum (via voltage/resistor), or accepts external clock - provides flexible EMI and timing coordination in multi-rail systems. |
| VIN1 / VIN2 | Dual input power pins | Parallel input path minimizes high-frequency loop area - reduces common-mode EMI and improves transient response versus single-VIN converters. |
| PGND1 / PGND2 | Power ground terminals | Separate low-side MOSFET return paths - allows independent high-current grounding to reduce ground bounce and improve thermal spreading. |
| SW | Switch node | Drives external inductor; connects to CBOOT via 100-nF capacitor - forms bootstrap gate drive for high-side FET with minimal ringing due to HotRod™ layout. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low EMI design | HotRod™ VQFN-HR package + parallel VIN paths + spread spectrum + adjustable SW rise time - achieves CISPR 25 Class 5 compliance without ferrite beads or metal shields. |
| Functional safety support | Documentation available for ISO 26262 ASIL-B system integration - includes FIT rate, failure mode analysis, and diagnostic coverage guidance for safety-critical power domains. |
| Load-dump robustness | 42-V absolute maximum input rating sustained for 400 ms - withstands ISO 7637-2 Pulse 5a without external TVS, reducing protection component count. |
| Scalable pin compatibility | Identical footprint and pinout with LM61440-Q1 (4 A), LM61460-Q1 (6 A), and LMQ62440-Q1 (4 A with integrated caps) - enables single PCB design across multiple power tiers. |
| Light-load efficiency | 7 µA no-load IQ and seamless PFM/PWM transition - maintains >71% efficiency at 100 µA output, critical for always-on vehicle modules. |
Applications
| Automotive Infotainment Head Unit Power | ADAS Camera Module Bias Supply |
|---|---|
Use Scenario: Powers SoC, DDR memory, and audio codec in centralized head unit with strict EMI limits near AM/FM antennas. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator delivering stable, low-noise rail with fast transient response to CPU burst loads. Use Value: Factory-trimmed 3.3 V output eliminates feedback resistor calibration; 2.1-MHz switching avoids AM band interference without added shielding. | Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera, operating continuously in parking mode. IC Role / Device Role / Timing Role: Always-on 3.3-V power stage with ultra-low quiescent current and thermal shutdown protection. Use Value: 7 µA no-load IQ extends battery life during 72-hour parking mode; AEC-Q100 Grade 1 ensures reliability at +105°C ambient under dash. |
| Automotive Cluster Display Backlight Driver | Body Control Module (BCM) Microcontroller Rail |
Use Scenario: Generates 3.3 V for TFT display controller and touch processor in digital instrument cluster with tight space constraints. IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter supporting dynamic brightness scaling and cold-cranking down to 3.0 V. Use Value: 4.0 mm × 3.5 mm VQFN-HR package fits narrow bezel layouts; 3.0-V minimum input sustains operation during engine cranking transients. | Use Scenario: Powers 32-bit ARM Cortex-M MCU and CAN transceiver in door module or seat control unit. IC Role / Device Role / Timing Role: Main system rail with enable-controlled sequencing, PGOOD monitoring, and load-dump survival. Use Value: Precision EN pin enables programmable UVLO; PGOOD signal validates rail stability before MCU boot; 42-V tolerance removes need for upstream TVS. |
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 |
|---|---|---|---|
| LM61440BPPQRJRRQ1 | Same 36-V/4-A rating and VQFN-HR package, but with adjustable switching frequency (200 kHz–2.2 MHz) instead of fixed 2.1 MHz. | Suitable when system-level frequency coordination or lower-frequency operation (e.g., for higher efficiency at light loads) is required. | Select LM61440BPPQRJRRQ1 if adjustable fSW is needed; LM62440BPPQRJRRQ1 offers optimized EMI performance at its factory-set 2.1 MHz. |
| LM62440CPPQRJRRQ1 | Identical package, pinout, and EMI features, but factory-trimmed to 5 V output instead of 3.3 V. | Used where 5-V logic rails or USB charging circuits require direct regulation without post-regulation LDOs. | Choose LM62440CPPQRJRRQ1 only when 5-V output is mandatory; LM62440BPPQRJRRQ1 provides tighter regulation margin for 3.3-V-sensitive interfaces like LVDS or MIPI. |
Compared with LM61440BPPQRJRRQ1, LM62440BPPQRJRRQ1 trades frequency flexibility for superior EMI performance at 2.1 MHz; compared with LM62440CPPQRJRRQ1, it delivers higher PSRR and lower dropout at 3.3 V, making it preferred for noise-sensitive digital subsystems.
Availability
LM62440BPPQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.
Supply support for LM62440BPPQRJRRQ1 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 broad power management portfolio.
The LM62440-Q1 product line delivers high-efficiency, low-EMI DC-DC solutions specifically engineered for demanding automotive subsystems including infotainment, ADAS, and body electronics - emphasizing functional safety readiness and AEC-Q100 Grade 1 reliability.
FAQ
What is the output voltage configuration of the LM62440BPPQRJRRQ1?
The LM62440BPPQRJRRQ1 is factory-trimmed to deliver a fixed 3.3 V output with ±1% total regulation accuracy over temperature, line, and load. No external feedback resistors are required - the FB pin is internally connected to the 3.3-V reference, simplifying design and improving long-term stability compared to adjustable versions.
Does the LM62440BPPQRJRRQ1 support spread spectrum operation?
Yes, the LM62440BPPQRJRRQ1 supports pseudorandom spread spectrum modulation to reduce peak EMI emissions. Spread spectrum is enabled or disabled via the MODE/SYNC pin using specific voltage thresholds or external resistor values, and operates across its full 2.1-MHz switching frequency range without affecting regulation accuracy or transient response.
What is the minimum input voltage required for the LM62440BPPQRJRRQ1 to maintain full 4-A output capability?
The LM62440BPPQRJRRQ1 requires a minimum input voltage of 3.95 V to sustain full 4-A output current at 3.3 V while maintaining regulation accuracy and thermal limits. Below this, current capability is reduced - though the device remains operational down to 3.0 V for lower-load scenarios such as standby or microcontroller bias.
How does the LM62440BPPQRJRRQ1 handle automotive load dump conditions?
The LM62440BPPQRJRRQ1 is rated for 42-V absolute maximum input voltage and designed to survive ISO 7637-2 Pulse 5a load dump events lasting up to 400 ms without external protection components. Its internal MOSFETs and control circuitry remain functional throughout the transient, eliminating the need for discrete TVS diodes in many automotive front-end designs.
Is the LM62440BPPQRJRRQ1 pin-compatible with other devices in the LM62440-Q1 family?
Yes, the LM62440BPPQRJRRQ1 shares identical pinout, package (14-pin VQFN-HR), and footprint with LM61440-Q1, LM61460-Q1, and LMQ62440-Q1. This enables hardware reuse across power levels (4 A/6 A) and feature sets (adjustable fSW, integrated caps), accelerating design iteration and reducing PCB revision cycles in automotive platforms.
LM62440BPPQRJRRQ1 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)
LM62440BPPQRJRRQ1 FAQ
1.How can I place an order for LM62440BPPQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM62440BPPQRJRRQ1 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 LM62440BPPQRJRRQ1 reliable?
The price and inventory of LM62440BPPQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM62440BPPQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM62440BPPQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM62440BPPQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM62440BPPQRJRRQ1?
LM62440BPPQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM62440BPPQRJRRQ1 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 LM62440BPPQRJRRQ1?
For technical support, including LM62440BPPQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM62440BPPQRJRRQ1 requirements.
6.How does Aetrix verify that LM62440BPPQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM62440BPPQRJRRQ1 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 LM62440BPPQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM62440BPPQRJRRQ1?
All LM62440BPPQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM62440BPPQRJRRQ1, 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 LM62440BPPQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM62440BPPQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM62440BPPQRJRRQ1 Tags
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