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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Texas Instruments LM62440CLPQRJRRQ1

Name: LM62440CLPQRJRRQ1
Brand: Texas Instruments
SKU: LM62440CLPQRJRRQ1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LM62440CLPQRJRRQ1

Manufacturer:: Texas Instruments

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: 14-PowerVFQFN

Datasheet:: LM62440CLPQRJRRQ1.pdf

Description:: IC REG BUCK 5V 4A 14VQFN

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Product details

Overview

LM62440CLPQRJRRQ1 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 range, with factory-set 5-V fixed output, 400-kHz switching frequency, ±1% total output regulation accuracy, and 42-V load dump tolerance-designed for infotainment head units and ADAS power rails.

For engineers reviewing the LM62440CLPQRJRRQ1 datasheet, LM62440CLPQRJRRQ1 pinout, LM62440CLPQRJRRQ1 application, or LM62440CLPQRJRRQ1 equivalent, key selection criteria include its 400-kHz fixed-frequency operation, low 7-µA no-load quiescent current, adjustable SW node rise time via RBOOT, spread spectrum EMI reduction, and VQFN-HR (14-pin) wettable flanks package optimized for automotive thermal and reliability requirements.

Technical Context

The LM62440CLPQRJRRQ1 implements a dual-input, dual-power-ground architecture with integrated high-side (41 mΩ typical R_DS(ON)) and low-side (21 mΩ typical R_DS(ON)) MOSFETs, enabling robust 4-A continuous operation at junction temperatures up to +150°C. Its control loop supports auto mode (PFM/PWM seamless transition), FPWM pin-selectable mode, and external synchronization from 200 kHz to 2.2 MHz.

EMI optimization includes pseudorandom spread spectrum, adjustable SW node rise time (2.15 ns to 2.7 ns depending on R_BOOT), HotRod™-derived VQFN-HR package with minimized switch-node ringing, and parallel VIN1/VIN2 input paths-enabling compliance with CISPR 25 Class 5 conducted emissions without added filtering in typical automotive layouts.

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-ensures system survival during ISO 7637-2 pulse 5a.
Output Voltage	Factory-set 5 V fixed; ±1% total regulation accuracy over –40°C to +150°C-meets tight rail requirements for SoCs and FPGAs.
Switching Frequency	400 kHz (factory option); enables use of smaller, lower-cost inductors vs. 2.1-MHz variant while maintaining high efficiency at medium loads.
No-Load Quiescent Current	7 µA at 13.5 V_IN/3.3 V_OUT; enables always-on subsystems (e.g., CAN wake-up circuits) with minimal battery drain.
Thermal Rating	AEC-Q100 Grade 1 (–40°C to +150°C T_J); qualified for under-hood and front-end ADAS applications.
Package	VQFN-HR (14-pin), 4.0 mm × 3.5 mm with wettable flanks-supports automated optical inspection (AOI) and improves solder joint reliability.
EMI Features	Pin-selectable spread spectrum, adjustable SW rise time, and optimized pinout-reduces peak conducted emissions by >10 dBµV in 150 kHz–108 MHz band.

Pinout & Package

VQFN-HR (14-pin) package, 4.00 mm × 3.50 mm body size, with wettable flanks for enhanced solder joint inspection and reliability in automotive reflow profiles.

Pin/Terminal	Circuit Role	Design Meaning
BIAS	Internal LDO bias input	Connect to V_OUT to improve light-load efficiency; tie to GND if V_OUT > 12 V-enables external bias optimization.
VCC	Internal LDO output	Supplies internal control circuitry; requires 1-µF capacitor to AGND-must not drive external loads.
AGND	Analog ground reference	Reference point for FB and VCC; must be connected to both PGND1 and PGND2-critical for feedback stability.
FB	Feedback input	Connected internally to 5-V divider; no external resistor needed-simplifies layout for fixed-output configuration.
PGOOD	Open-drain power-good indicator	Signals valid regulation (105%/94% thresholds); pulls low during EN deactivation or fault-enables safe system sequencing.
MODE/SYNC	Mode selection & sync input	Configures auto/FPWM mode and spread spectrum; also accepts external clock (200–2200 kHz)-provides flexible timing control.
EN	Enable input	0.4 V low / 1.263 V rising threshold with 24–32% hysteresis-supports precision UVLO and wake-up from deep sleep.
VIN1, VIN2	Dual input power pins	Parallel path reduces input ripple and EMI; each requires local high-quality bypass capacitors-improves high-current transient response.
PGND1, PGND2	Power ground return paths	Separate low-side MOSFET returns; must be low-impedance and joined at single point-minimizes ground bounce in high-dI/dt switching.
SW	Switch node	Drives external inductor; connects to CBOOT via internal diode-requires tight layout to reduce ringing and EMI.
RBOOT	SW rise-time control	Resistor between RBOOT and CBOOT sets dV/dt (2.15–2.7 ns); zero Ω = fastest edge-key for EMI tuning.
CBOOT	High-side gate driver supply	100-nF capacitor to SW forms bootstrap network-ensures reliable high-side FET turn-on across full duty cycle range.

Key Features

Feature	Design Value
Ultra-low EMI design	Combines spread spectrum, adjustable SW rise time, and VQFN-HR HotRod™ layout-meets CISPR 25 Class 5 without ferrite beads or shielding.
Automotive qualification	AEC-Q100 Grade 1 (–40°C to +150°C T_J) and functional safety documentation support-certified for safety-critical power domains.
Scalable pin compatibility	Shares footprint and pinout with LM61440-Q1 (4 A), LM61460-Q1 (6 A), and LMQ62440-Q1 (integrated caps)-enables platform-level BOM reuse.
Light-load efficiency	7 µA no-load I_Q and 76% PFM efficiency at 100 µA (5 V_OUT, 400 kHz)-extends battery runtime in always-on vehicle modules.
Robust protection suite	Includes thermal shutdown (168°C trip), hiccup-mode overcurrent, PGOOD monitoring, and 42-V input tolerance-eliminates need for external TVS in most load-dump scenarios.

Applications

Infotainment Head Unit Power	ADAS Camera Module Supply
Use Scenario: Powers SoC, DDR memory, and display interface in automotive head unit requiring stable 5-V rail with low noise and fast transient response. IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering up to 4 A with ±1% regulation accuracy and <2.5-ms soft-start-ensures clean power-up sequencing for multi-rail processors. Use Value: Factory-set 5-V output eliminates feedback resistor network; 400-kHz switching enables compact 2.2-µH inductor; wettable flanks ensure AOI-compatible assembly in high-volume production.	Use Scenario: Supplies image sensor, ISP, and serializer in forward-facing ADAS camera with strict EMI limits and extended temperature operation. IC Role / Device Role / Timing Role: Main 5-V power stage with spread spectrum and adjustable SW rise time-reduces radiated emissions near RF-sensitive radar bands. Use Value: AEC-Q100 Grade 1 rating ensures operation at +125°C ambient; 7-µA quiescent current supports low-power parking mode; 42-V tolerance handles alternator transients without external clamping.
USB-C In-Car Charging Port	Body Control Module (BCM) Core Rail
Use Scenario: Provides regulated 5-V bus for USB-C PD sink applications in center console, supporting up to 3 A continuous load with thermal headroom. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with FPWM mode option-maintains constant 400-kHz frequency during light-to-heavy load transitions for predictable EMI profile. Use Value: Dual VIN1/VIN2 inputs handle high-current PCB routing; PGOOD signal enables host microcontroller to manage port enable/disable safely; ±1% accuracy meets USB BC1.2 voltage compliance.	Use Scenario: Generates core 5-V supply for BCM microcontroller, CAN transceivers, and sensor interfaces in harsh under-dash environments. IC Role / Device Role / Timing Role: Primary power converter with thermal shutdown (168°C), hiccup overcurrent, and precise enable threshold-ensures fail-safe behavior during thermal overload or short-circuit events. Use Value: VQFN-HR package withstands thermal cycling per JESD22-A104; wettable flanks enable post-solder inspection; 400-kHz frequency balances efficiency and solution size for space-constrained BCM PCBs.

Infotainment Head Unit Power

ADAS Camera Module Supply

Use Scenario: Powers SoC, DDR memory, and display interface in automotive head unit requiring stable 5-V rail with low noise and fast transient response.

IC Role / Device Role / Timing Role: Primary 5-V buck regulator delivering up to 4 A with ±1% regulation accuracy and <2.5-ms soft-start-ensures clean power-up sequencing for multi-rail processors.

Use Value: Factory-set 5-V output eliminates feedback resistor network; 400-kHz switching enables compact 2.2-µH inductor; wettable flanks ensure AOI-compatible assembly in high-volume production.

Use Scenario: Supplies image sensor, ISP, and serializer in forward-facing ADAS camera with strict EMI limits and extended temperature operation.

IC Role / Device Role / Timing Role: Main 5-V power stage with spread spectrum and adjustable SW rise time-reduces radiated emissions near RF-sensitive radar bands.

Use Value: AEC-Q100 Grade 1 rating ensures operation at +125°C ambient; 7-µA quiescent current supports low-power parking mode; 42-V tolerance handles alternator transients without external clamping.

USB-C In-Car Charging Port

Body Control Module (BCM) Core Rail

Use Scenario: Provides regulated 5-V bus for USB-C PD sink applications in center console, supporting up to 3 A continuous load with thermal headroom.

IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with FPWM mode option-maintains constant 400-kHz frequency during light-to-heavy load transitions for predictable EMI profile.

Use Value: Dual VIN1/VIN2 inputs handle high-current PCB routing; PGOOD signal enables host microcontroller to manage port enable/disable safely; ±1% accuracy meets USB BC1.2 voltage compliance.

Use Scenario: Generates core 5-V supply for BCM microcontroller, CAN transceivers, and sensor interfaces in harsh under-dash environments.

IC Role / Device Role / Timing Role: Primary power converter with thermal shutdown (168°C), hiccup overcurrent, and precise enable threshold-ensures fail-safe behavior during thermal overload or short-circuit events.

Use Value: VQFN-HR package withstands thermal cycling per JESD22-A104; wettable flanks enable post-solder inspection; 400-kHz frequency balances efficiency and solution size for space-constrained BCM PCBs.

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
LM62440BPPQRJRRQ1	Same 400-kHz frequency and VQFN-HR package, but factory-set 3.3-V output instead of 5 V	Targeted at 3.3-V logic rails (e.g., MCU cores, CAN FD transceivers) rather than 5-V USB or analog subsystems	Select when system requires 3.3-V output with identical thermal, EMI, and layout characteristics
LM61440CLPQRJRRQ1	Same 400-kHz frequency and 5-V fixed output, but rated for 36 V/4 A with adjustable f_SW (not factory-fixed) and different pinout	Lacks spread spectrum and SW rise-time control; intended for cost-sensitive non-EMI-critical applications	Choose only if EMI performance is secondary and design flexibility for frequency tuning is required

Compared with LM62440BPPQRJRRQ1, the LM62440CLPQRJRRQ1 delivers identical thermal, efficiency, and EMI performance but targets 5-V loads; versus LM61440CLPQRJRRQ1, it provides superior EMI control and automotive qualification depth at the cost of fixed frequency-making it optimal for noise-sensitive ADAS and infotainment systems.

Availability

LM62440CLPQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control module designs requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.

Supply support for LM62440CLPQRJRRQ1 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 experience in high-reliability power management solutions.

The LM62440-Q1 product line delivers high-efficiency, low-EMI automotive DC-DC converters targeting infotainment, ADAS, and body electronics-designed specifically to meet stringent CISPR 25, AEC-Q100, and functional safety requirements.

FAQ

What is the switching frequency of the LM62440CLPQRJRRQ1?

The LM62440CLPQRJRRQ1 is factory-configured for 400-kHz operation. This fixed frequency enables predictable EMI behavior and allows use of larger, lower-cost inductors compared to higher-frequency variants-ideal for thermally constrained automotive modules where efficiency at medium loads is prioritized over minimum solution size. The LM62440CLPQRJRRQ1 does not support adjustable frequency via external resistor or SYNC pin in this configuration.

Does the LM62440CLPQRJRRQ1 require external feedback resistors for 5-V output?

No, the LM62440CLPQRJRRQ1 features a factory-trimmed 5-V fixed output. The FB pin is internally connected to the voltage divider, eliminating the need for external resistors-reducing BOM count, layout area, and potential drift errors. This simplifies design validation and improves long-term output accuracy over temperature and lifetime compared to adjustable versions.

How does the LM62440CLPQRJRRQ1 achieve ultra-low EMI performance?

The LM62440CLPQRJRRQ1 achieves ultra-low EMI through three integrated techniques: pseudorandom spread spectrum modulation (±2% frequency dither), pin-selectable SW node rise time control via RBOOT (2.15–2.7 ns), and a VQFN-HR HotRod™ package with optimized pinout and parallel input paths. These features collectively suppress peak conducted emissions by >10 dBµV in the 150 kHz–108 MHz band-enabling CISPR 25 Class 5 compliance without additional filtering components.

What is the maximum input voltage the LM62440CLPQRJRRQ1 can withstand?

The LM62440CLPQRJRRQ1 supports absolute maximum input voltage of 42 V, enabling robust operation during automotive load dump events (ISO 7637-2 Pulse 5a). It maintains regulation across 3 V–36 V normal input range and sustains 42-V transients for up to 400 ms without damage or latch-up-eliminating the need for external TVS diodes in most vehicle architectures.

Is the LM62440CLPQRJRRQ1 pin-compatible with other devices in the LM62440-Q1 family?

Yes, the LM62440CLPQRJRRQ1 shares identical VQFN-HR (14-pin) package, pinout, and footprint with all LM62440-Q1 variants-including LM62440BPPQRJRRQ1 (3.3-V), LM62440APPQRJRRQ1 (adjustable), and LMQ62440-Q1 (integrated capacitors). This enables direct substitution within the same PCB layout for voltage, frequency, or feature variation-reducing design reuse effort and accelerating platform development.

LM62440CLPQRJRRQ1 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:: Fixed

Number of Outputs:: 1

Voltage - Input (Min):: 3V

Voltage - Input (Max):: 36V

Voltage - Output (Min/Fixed):: 5V

Voltage - Output (Max):: -

Current - Output:: 4A

Frequency - Switching:: 400kHz

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)

LM62440CLPQRJRRQ1 FAQ

1.How can I place an order for LM62440CLPQRJRRQ1 through Aetrix?

Please submit a Request for Quotation (RFQ) for LM62440CLPQRJRRQ1 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 LM62440CLPQRJRRQ1 reliable?

The price and inventory of LM62440CLPQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM62440CLPQRJRRQ1 is usually 5 days.

3.What payment methods are accepted for LM62440CLPQRJRRQ1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM62440CLPQRJRRQ1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LM62440CLPQRJRRQ1?

LM62440CLPQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LM62440CLPQRJRRQ1 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 LM62440CLPQRJRRQ1?

For technical support, including LM62440CLPQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM62440CLPQRJRRQ1 requirements.

6.How does Aetrix verify that LM62440CLPQRJRRQ1 is sourced from the original manufacturer or authorized distributors?

All LM62440CLPQRJRRQ1 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 LM62440CLPQRJRRQ1 meets industry standards.

7.What is the process for return or replacement of LM62440CLPQRJRRQ1?

All LM62440CLPQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM62440CLPQRJRRQ1, 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 LM62440CLPQRJRRQ1 part is unused and in its original packaging.

Return procedure for LM62440CLPQRJRRQ1:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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