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Texas Instruments LM62435CPPQRJRRQ1
- Part No.:
- LM62435CPPQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM62435CPPQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3.5A 14VQFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM62435CPPQRJRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC-DC converter delivering up to 3.5 A output current across 3 V–36 V input, with fixed 5-V output, ±1% regulation accuracy, and 2.1-MHz switching frequency. It supports 42-V load dump, operates from –40°C to +150°C junction temperature, and targets infotainment power rails.
For engineers reviewing the LM62435CPPQRJRRQ1 datasheet, LM62435CPPQRJRRQ1 pinout, LM62435CPPQRJRRQ1 application, or LM62435CPPQRJRRQ1 equivalent, this page delivers verified technical context, EMI-optimized design parameters, automotive-grade thermal and functional safety specifications, and validated alternative options for scalable 5-V automotive power supplies.
Technical Context
The LM62435CPPQRJRRQ1 implements peak-current-mode control with integrated high-side (41 mΩ typical RDS(on)) and low-side (21 mΩ) MOSFETs, enabling efficient 3.5-A operation at 2.1 MHz. Its HotRod™ VQFN-HR package minimizes switch-node ringing, while parallel VIN1/VIN2 paths reduce parasitic inductance.
EMI mitigation includes pseudo-random spread spectrum (±2% frequency deviation), adjustable SW node rise time via RBOOT, and pin-selectable FPWM mode for constant-frequency light-load operation. Synchronization range spans 200 kHz–2.2 MHz, and soft recovery from dropout prevents output overshoot.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V continuous; withstands 42-V load dump for 400 ms - enables direct battery connection without external TVS. |
| Output Voltage | Fixed 5 V (factory-trimmed, ±1% total accuracy over temp/load) - eliminates external feedback divider and reduces BOM count. |
| Switching Frequency | 2.1 MHz nominal (adjustable 200 kHz–2.2 MHz) - allows use of compact 1–2.2 µH inductors and avoids AM-band interference. |
| Quiescent Current | 7 µA at no load (VIN = 13.5 V, VOUT = 3.3 V) - supports always-on automotive modules with minimal battery drain. |
| Thermal Rating | AEC-Q100 Grade 1 (–40°C to +150°C TJ) - qualified for under-hood and head-unit applications requiring extended temperature reliability. |
| EMI Performance | CISPR-25 Class 5 compliant with spread spectrum and optimized layout - reduces need for shielding or ferrite beads in ECU designs. |
| Protection Features | Thermal shutdown (158°C–180°C trip), hiccup-mode short-circuit protection, PGOOD with 1.3% hysteresis, and input UVLO with 1-V hysteresis. |
Pinout & Package
VQFN-HR (14-pin) package, 4.00 mm × 3.50 mm body size, exposed thermal pad for enhanced PCB heat dissipation. Pinout optimized for low-EMI layout with dual VIN inputs and split PGND pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS | LDO bias input | Connects to VOUT to improve efficiency; optional 0.1–1 µF capacitor to AGND enhances noise immunity. |
| VCC | Internal LDO output | Supplies internal control circuitry; requires 1-µF capacitor to AGND - no external loading permitted. |
| AGND | Analog ground reference | Reference point for FB, VCC, and internal error amplifier; must be tied to both PGND1 and PGND2 on PCB. |
| FB | Feedback input | Internally connected to 5-V trim resistor network; not user-accessible - fixed-output configuration only. |
| PGOOD | Open-drain status output | Asserts high when output is within ±3% of 5 V; pulls low during EN deactivation or fault - replaces external supervisor IC. |
| MODE/SYNC | Mode selection & sync input | Configures Auto/FPWM mode and enables external clock synchronization; spread spectrum enabled by voltage level (2.5 V–4.9 V). |
| EN | Enable control | Active-high precision enable with 1.263-V threshold and 24–32% hysteresis - supports adjustable UVLO for system sequencing. |
| VIN1 / VIN2 | Dual input power rails | Parallel high-current paths minimize input loop inductance; each requires local high-quality bypass capacitors to respective PGND. |
| PGND1 / PGND2 | Power ground returns | Separate low-side MOSFET ground paths; low-impedance tie to system ground and to each other minimizes ground bounce. |
| SW | Switch node | Connects to output inductor; fast edge rate controlled by RBOOT/CBOOT - critical for EMI performance. |
| RBOOT | Rise-time adjustment | Resistor between SW and CBOOT sets SW node rise time (2.15 ns to 2.7 ns); zero Ω yields fastest edge. |
| CBOOT | Bootstrap supply rail | Charged via internal diode from VCC; 100-nF capacitor to SW provides gate drive for high-side MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| HotRod™ VQFN-HR packaging | Reduces switch-node ringing and parasitic inductance - enables >93% efficiency at 3.5 A and 2.1 MHz without shielding. |
| Pseudo-random spread spectrum | ±2% frequency deviation at 1.5-Hz pattern rate - lowers peak conducted emissions by up to 10 dB for CISPR-25 Class 5 compliance. |
| Adjustable SW node rise time | Configurable via RBOOT (0 Ω to open) - balances EMI reduction against efficiency loss in high-frequency operation. |
| Auto-mode frequency foldback | Reduces switching frequency at light loads - maintains 73% efficiency at 100 µA while holding quiescent current to 7 µA. |
| Integrated bias LDO (VCC) | 3.3-V internal supply with 3.6-V UVLO - eliminates need for external bias rail and simplifies multi-rail system design. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Supply |
|---|---|
Use Scenario: Powers SoC, display interface, and USB charging circuits in centralized head units operating from 12-V battery with load dump transients. IC Role / Device Role / Timing Role: Primary 5-V buck regulator supplying core logic and I/O rails; handles cold-crank (3.0 V) and load dump (42 V) without external protection. Use Value: Fixed 5-V output eliminates feedback resistors; 2.1-MHz operation enables <2.2-µH inductors, reducing solution size by 35% vs. 400-kHz alternatives. |
Use Scenario: Supplies image sensor, ISP, and serializer in front-facing ADAS cameras mounted near engine compartment. IC Role / Device Role / Timing Role: High-reliability 5-V source with Grade 1 temperature rating and thermal shutdown - ensures uninterrupted operation at 125°C ambient. Use Value: 7-µA quiescent current extends battery backup runtime; PGOOD output replaces discrete reset IC for camera boot sequencing. |
| Automotive Cluster Display | Body Control Module (BCM) Subsystem |
Use Scenario: Generates stable 5-V rail for TFT-LCD timing controller, backlight driver, and touch controller in digital instrument clusters. IC Role / Device Role / Timing Role: EMI-optimized buck converter placed near display module; spread spectrum and low-ringing SW node prevent display noise coupling. Use Value: CISPR-25 Class 5 compliance achieved without shielded inductors or metal cans - lowers BOM cost and assembly complexity. |
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in BCMs requiring always-on functionality and low standby power. IC Role / Device Role / Timing Role: Always-on 5-V regulator with precision enable and 1-V UVLO hysteresis - enables clean wake-up from deep sleep states. Use Value: 0.6–6 µA shutdown current eliminates need for external load switch; integrated PGOOD simplifies MCU reset timing. |
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 |
|---|---|---|---|
| LM62435APPQRJRRQ1 | Adjustable output (1 V to 95% VIN); same 2.1-MHz default, identical pinout and package. | Requires external feedback divider; suited for systems needing non-standard voltages like 3.8 V or 4.2 V. | Select when output voltage flexibility outweighs BOM simplicity - no layout change required. |
| LM62435BPPQRJRRQ1 | Fixed 3.3-V output; otherwise identical electrical specs, thermal performance, and EMI features. | Targets 3.3-V logic rails (e.g., MCU cores, FPGAs) instead of 5-V peripherals or interfaces. | Choose for 3.3-V systems where tighter regulation tolerance (±1%) and automotive qualification are mandatory. |
Compared with LM62435APPQRJRRQ1 and LM62435BPPQRJRRQ1, the LM62435CPPQRJRRQ1 offers optimized 5-V delivery with factory-trimmed accuracy, eliminating feedback component variation and improving long-term stability in infotainment and cluster applications.
Availability
LM62435CPPQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply, AEC-Q100 compliance, and production-ready EMI performance.
Supply support for LM62435CPPQRJRRQ1 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 and embedded processing technologies, with decades of automotive-grade power management innovation.
The LM62435-Q1 product line delivers high-efficiency, low-EMI DC-DC conversion for demanding automotive environments - designed specifically for infotainment, ADAS, and body electronics where size, thermal robustness, and regulatory compliance are critical.
FAQ
What is the output voltage configuration of the LM62435CPPQRJRRQ1?
The LM62435CPPQRJRRQ1 is factory-configured for fixed 5-V output with ±1% total regulation accuracy across temperature, line, and load. Unlike adjustable variants, it does not require external feedback resistors - the FB pin is internally connected to the 5-V trim network, simplifying layout and improving long-term stability.
Does the LM62435CPPQRJRRQ1 support synchronization to an external clock?
Yes, the LM62435CPPQRJRRQ1 supports external clock synchronization via the MODE/SYNC pin. It accepts input frequencies from 200 kHz to 2.2 MHz, with rising-edge triggering. This capability enables noise-sensitive systems to avoid AM-band interference or align multiple converters for reduced beat frequencies.
How does the LM62435CPPQRJRRQ1 achieve CISPR-25 Class 5 compliance?
The LM62435CPPQRJRRQ1 achieves CISPR-25 Class 5 compliance through integrated EMI-reduction techniques: HotRod™ package geometry minimizing switch-node ringing, parallel VIN1/VIN2 paths lowering input loop inductance, pseudo-random spread spectrum (±2% deviation), and adjustable SW node rise time via RBOOT - all validated in standard test setups without added shielding.
What thermal performance can be expected from the LM62435CPPQRJRRQ1 in a 4-layer PCB design?
In a standard 4-layer JEDEC board, the LM62435CPPQRJRRQ1 exhibits a junction-to-ambient thermal resistance (RθJA) of 58.7°C/W. With proper thermal pad soldering and copper pour, real-world designs achieve ~25°C/W - enabling full 3.5-A output at 125°C ambient without derating when using recommended layout guidelines.
Is the LM62435CPPQRJRRQ1 pin-compatible with other devices in the LM624xx-Q1 family?
Yes, the LM62435CPPQRJRRQ1 shares identical VQFN-HR (14-pin) package, pinout, and footprint with LM62435APPQRJRRQ1 (adjustable) and LM62435BPPQRJRRQ1 (3.3-V fixed). This enables drop-in replacement across output voltage variants without PCB redesign - supporting flexible platform development and last-minute BOM optimization.
LM62435CPPQRJRRQ1 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:
- 3.5A
- 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)
LM62435CPPQRJRRQ1 FAQ
1.How can I place an order for LM62435CPPQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM62435CPPQRJRRQ1 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 LM62435CPPQRJRRQ1 reliable?
The price and inventory of LM62435CPPQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM62435CPPQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM62435CPPQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM62435CPPQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM62435CPPQRJRRQ1?
LM62435CPPQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM62435CPPQRJRRQ1 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 LM62435CPPQRJRRQ1?
For technical support, including LM62435CPPQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM62435CPPQRJRRQ1 requirements.
6.How does Aetrix verify that LM62435CPPQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM62435CPPQRJRRQ1 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 LM62435CPPQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM62435CPPQRJRRQ1?
All LM62435CPPQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM62435CPPQRJRRQ1, 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 LM62435CPPQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM62435CPPQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM62435CPPQRJRRQ1 Tags
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