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Texas Instruments LM62435BPPQRJRRQ1
- Part No.:
- LM62435BPPQRJRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 14-PowerVFQFN
- Datasheet:
-
LM62435BPPQRJRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3.5A 14VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,963
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Product details
Overview
LM62435BPPQRJRRQ1 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 factory-trimmed 3.3 V fixed output, ±1% total regulation accuracy, and 2.1 MHz switching frequency. It supports 42-V load dump transients and operates from –40°C to +150°C junction temperature in infotainment head units and ADAS power rails.
For engineers reviewing the LM62435BPPQRJRRQ1 datasheet, LM62435BPPQRJRRQ1 pinout, LM62435BPPQRJRRQ1 application, or LM62435BPPQRJRRQ1 equivalent, key selection criteria include ultra-low EMI performance (CISPR 25 Class 5 compliant), adjustable SW node rise time, spread-spectrum operation, FPWM mode enablement, and thermal shutdown at 168°C with 10°C hysteresis.
Technical Context
The LM62435BPPQRJRRQ1 implements peak-current-mode control with integrated high-side (41 mΩ typical RDS(ON)) and low-side (21 mΩ typical RDS(ON)) MOSFETs, enabling stable regulation across wide VIN–VOUT ratios. Its pseudo-random spread spectrum (±2% frequency deviation at 1.5 Hz pattern rate) and parallel input path reduce peak conducted emissions without external shielding.
Auto-mode enables seamless PWM-to-PFM transition with 7 µA no-load quiescent current at 13.5 VIN/3.3 VOUT, while MODE/SYNC pin selects FPWM, synchronization (200 kHz–2.2 MHz), or spread-spectrum activation via resistor-based voltage thresholds (6 kΩ for on, 30 kΩ for off).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 36 V continuous; withstands 42 V for 400 ms during automotive load dump |
| Output Voltage | Factory-trimmed fixed 3.3 V ±1% total regulation accuracy over temperature and line |
| Max Output Current | 3.5 A DC continuous; derated above 150°C junction or with high fSW |
| Switching Frequency | 2.1 MHz nominal free-running; synchronizable from 200 kHz to 2.2 MHz to avoid noise-sensitive bands |
| Quiescent Current | 7 µA at no load (13.5 VIN/3.3 VOUT, Auto mode); 0.6 µA shutdown current |
| EMI Optimization | CISPR 25 Class 5 compliant; HotRod™ VQFN-HR package minimizes switch-node ringing |
| Thermal Protection | Thermal shutdown at 168°C (rising threshold), 10°C hysteresis; RθJA = 58.7°C/W (JEDEC 4-layer board) |
Pinout & Package
VQFN-HR (RJR) 14-pin package, 4.00 mm × 3.50 mm body size, wettable flank terminals for automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BIAS | LDO bias input | Connect to VOUT to improve light-load efficiency; ground if VOUT > 12 V |
| VCC | Internal LDO output | Supplies internal control circuitry; requires 1-µF capacitor to AGND; no external loading |
| AGND | Analog reference ground | Reference point for FB and VCC; must be tied to both PGND1 and PGND2 on PCB |
| FB | Feedback input | Connected directly to 3.3 V output for fixed-option use; not adjustable for this variant |
| PGOOD | Open-drain status output | Asserts high when output is within ±7% of 3.3 V; pulls low during EN = low or fault |
| MODE/SYNC | Mode selection & sync input | Resistor-programmable: sets FPWM, spread-spectrum, or external clock sync (rising-edge triggered) |
| EN | Enable input | Active-high precision enable with 1.263 V threshold and 28% hysteresis; supports adjustable UVLO |
| VIN1 / VIN2 | Power inputs | Dual high-current inputs with parallel path; require low-inductance bypass capacitors to respective PGND pins |
| PGND1 / PGND2 | Power ground returns | Separate low-side MOSFET return paths; must be low-impedance and joined at single-point AGND tie |
| SW | Switch node | Connects to output inductor; rise time adjustable via RBOOT (0–100 Ω) for EMI tuning |
| RBOOT | Rise-time control | Resistor between RBOOT and CBOOT sets SW node dV/dt; 0 Ω yields 2.15 ns (10%–80%) |
| CBOOT | Bootstrap supply | 100-nF capacitor between CBOOT and SW; internal diode charges from VCC during low-SW phase |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +150°C TJ; meets automotive reliability and stress test requirements |
| Ultra-low EMI architecture | HotRod™ package + parallel VIN paths + spread spectrum + adjustable SW rise time eliminate need for metal shielding |
| Load-dump robustness | 42-V absolute maximum rating supports ISO 7637-2 Pulse 5a for 400 ms without external TVS |
| High-efficiency light-load operation | 7 µA no-load IQ enables always-on systems; PFM mode achieves 73% efficiency at 100 µA (5 VOUT) |
| Flexible frequency control | Pin-selectable FPWM or sync mode allows optimization for size (2.1 MHz) or efficiency (400 kHz) |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Power Rail |
|---|---|
Use Scenario: Powering SoC, display interface, and USB charging circuits in a vehicle head unit with strict EMI limits near AM/FM receivers. IC Role / Device Role / Timing Role: Primary 3.3 V buck regulator supplying core logic and memory subsystems; delivers stable output during cold-crank (3.0 VIN) and load-dump (42 VIN) events. Use Value: 2.1 MHz switching enables compact 2.2 µH inductor and 22 µF ceramic output capacitance; CISPR 25 Class 5 compliance avoids costly shielded enclosures. | Use Scenario: Providing clean, regulated 3.3 V to image sensor and ISP in forward-facing ADAS camera module operating under engine bay temperature extremes. IC Role / Device Role / Timing Role: High-reliability point-of-load converter with thermal shutdown at 168°C and functional safety documentation support for ASIL-B system integration. Use Value: ±1% output accuracy ensures consistent sensor biasing; 7 µA quiescent current extends battery life during vehicle sleep mode. |
| Automotive Body Control Module | Cluster Display Backlight Driver Supply |
Use Scenario: Powering microcontroller, CAN transceiver, and LED drivers in a door module requiring long-term stability and low standby consumption. IC Role / Device Role / Timing Role: Main 3.3 V supply with precision enable (VEN = 1.263 V) used as programmable UVLO to coordinate wake-up sequencing with vehicle bus activity. Use Value: 0.6 µA shutdown current prevents battery drain; PGOOD output replaces external supervisor IC for reset generation. | Use Scenario: Generating stable 3.3 V rail for TFT-LCD timing controller and gamma correction circuitry in digital instrument cluster with variable backlight brightness. IC Role / Device Role / Timing Role: Fixed-output buck converter operating in FPWM mode to eliminate audible switching noise during dimming transitions. Use Value: Pin-selectable FPWM ensures constant 2.1 MHz frequency regardless of load, eliminating beat frequencies with display refresh rates. |
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 | Same package and pinout; adjustable output (1 V to 95% VIN) instead of fixed 3.3 V | Used where dynamic voltage scaling or multiple output rails are required | Select when output voltage flexibility outweighs fixed-voltage simplicity and cost |
| LM62435CPPQRJRRQ1 | Same package and pinout; factory-trimmed 5 V fixed output instead of 3.3 V | Deployed in systems requiring 5 V for USB peripherals or legacy interfaces | Choose for 5 V applications without redesigning feedback network or layout |
Compared with LM62435APPQRJRRQ1 and LM62435CPPQRJRRQ1, the LM62435BPPQRJRRQ1 offers optimized BOM simplicity and reduced layout risk for dedicated 3.3 V loads, eliminating external resistors and trimming tolerance effects while maintaining identical thermal, EMI, and transient performance.
Availability
LM62435BPPQRJRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply, long-lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for LM62435BPPQRJRRQ1 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and automotive-grade power management solutions.
The LM62435-Q1 product line delivers high-efficiency, low-EMI DC-DC conversion for automotive subsystems demanding AEC-Q100 qualification, functional safety readiness, and robust operation across –40°C to +150°C.
FAQ
What is the output voltage configuration of the LM62435BPPQRJRRQ1?
The LM62435BPPQRJRRQ1 is factory-trimmed to deliver a fixed 3.3 V output with ±1% total regulation accuracy across line, load, and temperature. Unlike adjustable variants, it does not require external feedback resistors - the FB pin connects directly to the output node, simplifying layout and reducing BOM count.
Does the LM62435BPPQRJRRQ1 support spread-spectrum operation?
Yes, the LM62435BPPQRJRRQ1 supports spread-spectrum operation via the MODE/SYNC pin. When configured with a 6-kΩ pull-down resistor, it activates pseudo-random frequency modulation with ±2% deviation at 1.5 Hz, reducing peak conducted EMI to meet CISPR 25 Class 5 requirements without added filtering.
What is the maximum input voltage the LM62435BPPQRJRRQ1 can withstand during automotive load dump?
The LM62435BPPQRJRRQ1 has an absolute maximum input rating of 42 V and is designed to sustain 42-V transients for up to 400 ms per ISO 7637-2 Pulse 5a, eliminating the need for external TVS diodes in many automotive front-end designs.
How does the LM62435BPPQRJRRQ1 achieve ultra-low EMI performance?
The LM62435BPPQRJRRQ1 achieves ultra-low EMI through four integrated techniques: (1) HotRod™ VQFN-HR package minimizing switch-node parasitic inductance, (2) dual parallel VIN paths reducing input loop area, (3) adjustable SW node rise time via RBOOT pin, and (4) pseudo-random spread spectrum modulation - collectively enabling CISPR 25 Class 5 compliance without shielding.
Is the LM62435BPPQRJRRQ1 pin-compatible with other devices in the LM624xx-Q1 family?
Yes, the LM62435BPPQRJRRQ1 shares identical VQFN-HR (14-pin) packaging and pinout with LM62440-Q1 (4 A) and LM61460-Q1 (6 A), enabling scalable power design. However, current capability, thermal limits, and certain electrical characteristics differ - layout reuse is possible, but validation of thermal performance and current handling is required.
LM62435BPPQRJRRQ1 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)
LM62435BPPQRJRRQ1 FAQ
1.How can I place an order for LM62435BPPQRJRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM62435BPPQRJRRQ1 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 LM62435BPPQRJRRQ1 reliable?
The price and inventory of LM62435BPPQRJRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM62435BPPQRJRRQ1 is usually 5 days.
3.What payment methods are accepted for LM62435BPPQRJRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM62435BPPQRJRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM62435BPPQRJRRQ1?
LM62435BPPQRJRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM62435BPPQRJRRQ1 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 LM62435BPPQRJRRQ1?
For technical support, including LM62435BPPQRJRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM62435BPPQRJRRQ1 requirements.
6.How does Aetrix verify that LM62435BPPQRJRRQ1 is sourced from the original manufacturer or authorized distributors?
All LM62435BPPQRJRRQ1 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 LM62435BPPQRJRRQ1 meets industry standards.
7.What is the process for return or replacement of LM62435BPPQRJRRQ1?
All LM62435BPPQRJRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LM62435BPPQRJRRQ1, 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 LM62435BPPQRJRRQ1 part is unused and in its original packaging.
Return procedure for LM62435BPPQRJRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM62435BPPQRJRRQ1 Tags
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