My Inquiry
My Account
Texas Instruments LM62440BLPQRJRRQ1
- Part No.:
- LM62440BLPQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM62440BLPQRJRRQ1.pdf
- Description:
- IC REG BUCK 3.3V 4A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,898
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM62440BLPQRJRRQ1 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-set 3.3 V fixed output, 400 kHz switching frequency, ±1% total regulation accuracy, and 42 V load dump tolerance - deployed in infotainment head units and ADAS power rails.
For engineers reviewing the LM62440BLPQRJRRQ1 datasheet, LM62440BLPQRJRRQ1 pinout, LM62440BLPQRJRRQ1 application, or LM62440BLPQRJRRQ1 equivalent, key selection considerations include its 400 kHz factory frequency option for high efficiency at low operating frequency, adjustable SW node rise time via RBOOT, FPWM mode enablement, and VQFN-HR (14-pin) wettable flank package optimized for ultra-low EMI in automotive environments.
Technical Context
The LM62440BLPQRJRRQ1 integrates high-side and low-side MOSFETs (RDS(ON) = 41 mΩ / 21 mΩ typ.) and implements soft recovery from dropout to eliminate output overshoot. Its control architecture supports auto mode (PFM/PWM seamless transition), pin-selectable FPWM, and external synchronization from 200 kHz to 2.2 MHz.
EMI mitigation is achieved through pseudorandom spread spectrum, adjustable SW node rise time (2.15 ns–2.7 ns via RBOOT), parallel input path, and HotRod™-derived VQFN-HR package with minimized switch node ringing - validated per conducted EMI tests at 5 V output and 2.1 MHz/400 kHz frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V; supports 42 V load dump for 400 ms - enables robust operation in 12 V/24 V automotive systems. |
| Output Voltage | Factory-trimmed fixed 3.3 V (±1% total accuracy); eliminates external feedback divider in space-constrained designs. |
| Switching Frequency | 400 kHz (factory option); balances high light-load efficiency and compact magnetics vs. 2.1 MHz variant. |
| Quiescent Current | 7 µA at no load (13.5 VIN, 3.3 VOUT); extends battery runtime in always-on automotive modules. |
| Output Current | Up to 4 A continuous; derated based on thermal conditions - sufficient for powering SoCs, FPGAs, and display controllers. |
| Package | VQFN-HR (14-pin, 4.0 mm × 3.5 mm) with wettable flanks; supports automated optical inspection and high-reliability solder joint formation. |
| Thermal Performance | RθJA = 25 °C/W on 4-layer JEDEC board; junction temperature rated from –40 °C to +150 °C (Grade 1). |
Pinout & Package
VQFN-HR (14-pin) package with 4.00 mm × 3.50 mm body size and wettable flanks for enhanced solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS | LDO bias input | Connects to VOUT to improve efficiency; capacitor to AGND adds noise immunity - critical for low-noise analog rail generation. |
| 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 tied to both PGND1 and PGND2 to minimize ground bounce in high-dI/dt paths. |
| FB | Feedback input | Directly connected to 3.3 V output for fixed-option operation; open-circuit or grounding causes regulation failure. |
| MODE/SYNC | Mode selection & sync input | Configures auto/FPWM mode and spread spectrum; resistor-based voltage selection determines EMI behavior - no floating allowed. |
| EN | Enable control | Active-high precision enable with UVLO capability; threshold 1.263 V (±5%) - supports system-level power sequencing. |
| VIN1 / VIN2 | Power inputs | Dual input pins reduce trace inductance; must be low-impedance paralleled with separate bypass capacitors to respective PGND pins. |
| PGND1 / PGND2 | Power ground returns | Separate low-side MOSFET return paths; require low-inductance connection to system ground and local bypass caps. |
| SW | Switch node | Connects to output inductor; high dV/dt node - layout minimizes loop area to suppress EMI and ringing. |
| RBOOT | Bootstrap timing control | Sets SW node rise time (2.15–2.7 ns) via series resistor to CBOOT - key parameter for optimizing EMI vs. efficiency trade-off. |
| CBOOT | High-side gate driver supply | 100-nF capacitor between SW and CBOOT forms bootstrap network; internal diode charges it during low-SW phase. |
| PGOOD | Open-drain status output | Indicates valid regulation (105%/94% thresholds); requires external pull-up - used for downstream power sequencing and fault reporting. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to +150 °C junction operation - meets automotive power supply reliability requirements without derating. |
| Ultra-low EMI design | Combines spread spectrum, adjustable SW rise time, parallel input path, and VQFN-HR package - reduces peak conducted emissions below CISPR 25 Class 5 limits. |
| 400 kHz factory frequency option | Optimizes efficiency at light loads and enables use of larger, lower-cost inductors - improves thermal performance in high-ambient environments. |
| Soft recovery from dropout | Prevents output voltage overshoot during input transients - protects downstream logic and analog circuitry in start-stop and cold-crank scenarios. |
| External bias input (BIAS pin) | Allows connection to VOUT to reduce internal LDO losses - improves full-load efficiency by up to 2% compared to self-biased operation. |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers main SoC, audio codec, and USB-C PD controller in automotive head units with strict EMI limits and extended temperature operation. IC Role / Device Role / Timing Role: Primary 3.3 V buck regulator delivering 4 A with <1% regulation accuracy and 42 V load dump survival. Use Value: Factory-fixed 3.3 V output eliminates feedback resistor network, saving PCB area and BOM cost while ensuring consistent performance across production lots. | Use Scenario: Supplies image sensor, ISP, and serializer in front/rear camera modules where low noise and thermal stability are critical. IC Role / Device Role / Timing Role: High-efficiency 400 kHz buck converter providing clean 3.3 V rail with 7 µA quiescent current for always-on wake-up functionality. Use Value: Adjustable SW node rise time and spread spectrum allow EMI tuning to meet stringent CISPR 25 radiated emission limits without shielding or ferrites. |
| Body Control Module Core Rail | Cluster Display Backlight Driver Bias |
Use Scenario: Generates core 3.3 V supply for microcontroller, CAN transceivers, and LIN interface in body electronics with long-term reliability demands. IC Role / Device Role / Timing Role: Automotive-grade synchronous buck converter with functional safety documentation support and thermal shutdown at 168 °C. Use Value: Pin compatibility with LM61440-Q1 and LM61460-Q1 enables scalable power architecture across vehicle platforms with minimal layout changes. | Use Scenario: Provides stable 3.3 V bias for LED driver ICs in digital instrument clusters requiring flicker-free backlight operation. IC Role / Device Role / Timing Role: Low-noise, high-PSRR buck regulator with soft-start and PGOOD signaling for safe power sequencing. Use Value: ±1% output regulation accuracy ensures consistent LED current and brightness across temperature and line variations - critical for visual quality compliance. |
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 |
|---|---|---|---|
| LM62440ALPQRJRRQ1 | Same 400 kHz frequency but adjustable output (1 V to 95% VIN); no fixed 3.3 V trim. | Used where flexible VOUT configuration is required - e.g., multi-rail systems needing 1.8 V or 2.5 V outputs. | Select LM62440ALPQRJRRQ1 only if adjustable output is needed; LM62440BLPQRJRRQ1 saves BOM and layout effort for dedicated 3.3 V use. |
| LM62440CPPQRJRRQ1 | Same 2.1 MHz frequency and 5 V fixed output; higher switching frequency enables smaller magnetics. | Preferred for space-constrained designs requiring 5 V rails - e.g., USB hub or Ethernet PHY supplies. | Choose LM62440CPPQRJRRQ1 when 5 V output and faster transient response are prioritized over light-load efficiency. |
Compared with LM62440ALPQRJRRQ1 and LM62440CPPQRJRRQ1, the LM62440BLPQRJRRQ1 offers optimal balance of low-light-load efficiency (7 µA IQ), EMI performance at 400 kHz, and zero-component fixed 3.3 V output - making it the most direct fit for cost-sensitive, thermally demanding automotive 3.3 V applications.
Availability
LM62440BLPQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control unit power supplies requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for LM62440BLPQRJRRQ1 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 synchronous buck converters specifically engineered for automotive power rails - targeting infotainment, ADAS, and body electronics where reliability, thermal resilience, and EMI compliance are non-negotiable.
FAQ
What is the switching frequency of the LM62440BLPQRJRRQ1?
The LM62440BLPQRJRRQ1 is factory-configured for a 400 kHz switching frequency. This fixed option optimizes light-load efficiency and enables use of larger, lower-cost inductors compared to the 2.1 MHz variant. The device does not support user-adjustable frequency via external resistor or SYNC pin in this configuration - the 400 kHz setting is hard-coded at manufacture.
Does the LM62440BLPQRJRRQ1 require external feedback resistors?
No, the LM62440BLPQRJRRQ1 does not require external feedback resistors. It features a factory-trimmed 3.3 V fixed output, with FB pin internally connected to the regulation circuit. Connecting external resistors or floating the FB pin will disrupt regulation - the device is designed for zero-component output configuration in 3.3 V applications.
What package type and dimensions does the LM62440BLPQRJRRQ1 use?
The LM62440BLPQRJRRQ1 uses the VQFN-HR (14-pin) package with nominal body size 4.00 mm × 3.50 mm and wettable flanks. This low-profile, thermally enhanced package supports automated optical inspection and provides superior solder joint reliability under automotive thermal cycling stress.
How does the LM62440BLPQRJRRQ1 handle automotive load dump conditions?
The LM62440BLPQRJRRQ1 withstands 42 V load dump transients for up to 400 ms without damage or regulation loss. Its input stage is rated for 42 V absolute maximum, and internal protection circuits maintain stable 3.3 V output during such events - meeting ISO 7637-2 Pulse 5a requirements when paired with appropriate input filtering.
Is the LM62440BLPQRJRRQ1 pin-compatible with other devices in the LM62440-Q1 family?
Yes, the LM62440BLPQRJRRQ1 is pin-compatible with LM62440ALPQRJRRQ1 (adjustable 400 kHz), LM62440CPPQRJRRQ1 (5 V, 2.1 MHz), and LM62440BPPQRJRRQ1 (3.3 V, 2.1 MHz). Identical VQFN-HR (14-pin) footprint and pin functions enable drop-in substitution across frequency and output voltage variants - simplifying platform scalability and design reuse.
LM62440BLPQRJRRQ1 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):
- 3.3V
- 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)
LM62440BLPQRJRRQ1 FAQ
1.How can I place an order for LM62440BLPQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM62440BLPQRJRRQ1 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 LM62440BLPQRJRRQ1 reliable?
The price and inventory of LM62440BLPQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM62440BLPQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM62440BLPQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM62440BLPQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM62440BLPQRJRRQ1?
LM62440BLPQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM62440BLPQRJRRQ1 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 LM62440BLPQRJRRQ1?
For technical support, including LM62440BLPQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM62440BLPQRJRRQ1 requirements.
6.How does Aetrix verify that LM62440BLPQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM62440BLPQRJRRQ1 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 LM62440BLPQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM62440BLPQRJRRQ1?
All LM62440BLPQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM62440BLPQRJRRQ1, 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 LM62440BLPQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM62440BLPQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM62440BLPQRJRRQ1 Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
