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Texas Instruments LMR50410Y3FQDBVRQ1
- Part No.:
- LMR50410Y3FQDBVRQ1
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6
- Datasheet:
-
LMR50410Y3FQDBVRQ1.pdf
- Description:
- IC REG BUCK 3.3V 1A SOT23-6
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR50410Y3FQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade synchronous buck converter delivering 3.3 V at up to 1 A from 4 V–36 V input, featuring 2.1-MHz fixed switching frequency, ±1% reference voltage accuracy, 60-ns minimum on-time, and integrated high- and low-side MOSFETs in SOT-23-6. It powers infotainment systems requiring stable, compact DC/DC conversion with hiccup-mode short-circuit protection.
For engineers reviewing the LMR50410Y3FQDBVRQ1 datasheet, LMR50410Y3FQDBVRQ1 pinout, LMR50410Y3FQDBVRQ1 application, or LMR50410Y3FQDBVRQ1 equivalent, key selection criteria include its FPWM operation for constant-frequency low-ripple output, precision enable for system-level UVLO sequencing, thermal shutdown at 170°C, and compatibility with 3.3-V fixed-output automotive power rails.
Technical Context
The LMR50410Y3FQDBVRQ1 employs fixed-frequency peak-current mode control with internal compensation, enabling stable regulation using minimal external components. Its FPWM mode maintains 2.1-MHz switching across full load range-unlike PFM variants-ensuring predictable EMI profile and tight output voltage regulation (±1.5% over temperature and line).
It integrates high-side (450 mΩ) and low-side (240 mΩ) NMOS switches, uses a bootstrap capacitor (CB) for high-side gate drive, and implements cycle-by-cycle current limiting with hiccup recovery. The device supports monotonic start-up into pre-biased outputs and features precision enable with 130-mV hysteresis for robust system sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V - supports direct connection to automotive battery rail including cold-crank (4.5 V) and load-dump (36 V) transients. |
| Output Voltage | Fixed 3.3 V ±1.5% - factory-trimmed; no external feedback resistors required, reducing BOM count and layout sensitivity. |
| Max Output Current | 1 A continuous - sufficient for powering microcontrollers, CAN transceivers, and sensor interfaces in body electronics. |
| Switching Frequency | 2.1 MHz (±14%) - enables use of sub-2.2-µH inductors and compact ceramic output capacitors for space-constrained modules. |
| Reference Voltage Accuracy | ±1% at TJ = 25°C - ensures precise output regulation critical for logic supply domains and ADC references. |
| Min On-Time | 60 ns - allows high step-down ratios (e.g., 24 V → 3.3 V) without frequency foldback at light loads. |
| Junction Temp Range | –40°C to +150°C - meets AEC-Q100 Grade 1 ambient requirements (–40°C to +125°C) with 25°C thermal margin. |
| Quiescent Current | 90 µA at VIN = 12 V, VOUT = 3.3 V, IOUT = 0 A - enables low-power always-on subsystems without excessive battery drain. |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm footprint, 0.95-mm height, thermally enhanced pad-less construction optimized for automotive PCB reliability and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap capacitor connection | Connects 100-nF ceramic capacitor to SW; supplies gate drive voltage for integrated high-side FET-critical for achieving full 98% duty cycle. |
| GND | Power ground | Common return for internal low-side FET source, CIN, and COUT; requires shortest possible trace to minimize switching noise coupling. |
| FB | Feedback input | Internally connected to 3.3-V output node; no external divider needed-eliminates resistor tolerance error and layout parasitics affecting regulation. |
| EN | Precision enable | Logic-controlled ON/OFF with 1.1–1.36 V turn-on threshold and 130-mV hysteresis; supports system-level UVLO via external resistor divider. |
| VIN | Main power input | Supplies internal bias LDO and high-side driver; must be decoupled with low-ESR ceramic capacitor placed adjacent to pin. |
| SW | Switching node | Drives external inductor; connects internally to source of high-side FET and drain of low-side FET-requires tight loop area with GND and CIN. |
Key Features
| Feature | Design Value |
|---|---|
| FPWM operation | Ensures constant 2.1-MHz switching across 0–1-A load-minimizes output voltage ripple and simplifies EMI filter design versus PFM alternatives. |
| Integrated synchronous rectification | Eliminates need for external Schottky diode; reduces conduction losses and improves full-load efficiency by >8% vs. asynchronous designs. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation-meets automotive cabin and engine bay thermal requirements without derating. |
| Monotonic start-up into pre-biased output | Prevents reverse current flow during hot-plug or power-rail sequencing-protects downstream logic and avoids bus contention. |
| Hiccup-mode short-circuit protection | Shuts down SW node upon overcurrent detection, then auto-retries after 135 ms-prevents thermal runaway while maintaining system recoverability. |
| Internal soft-start | 1.8-ms controlled ramp prevents inrush current surges into bulk capacitance-reduces stress on input capacitors and upstream power sources. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in vehicle head unit with wide-input battery supply. IC Role / Device Role / Timing Role: Primary 3.3-V buck regulator providing clean, low-noise logic supply with fast transient response to burst-mode processing loads. Use Value: FPWM mode delivers <15-mVpp output ripple at 1-A load-meets display timing controller noise immunity requirements without added LC filtering. | Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view camera ECU. IC Role / Device Role / Timing Role: Fixed 3.3-V point-of-load regulator with monotonic start-up ensuring reliable boot before MIPI CSI-2 link initialization. Use Value: 60-ns min on-time enables stable 3.3-V output even during 6-V cold-crank events-maintains camera functionality below standard battery voltage. |
| Body Control Module (BCM) | Automotive Gateway |
Use Scenario: Powers microcontroller, LIN transceiver, and LED drivers in door module or seat control unit. IC Role / Device Role / Timing Role: Compact, qualified DC/DC converter replacing discrete LDOs to improve efficiency and thermal performance in sealed enclosures. Use Value: SOT-23-6 footprint fits within 12 mm² board area-enables integration into space-limited plastic housings without thermal vias. | Use Scenario: Provides isolated 3.3-V rail for CAN FD and Ethernet AVB controllers in central gateway ECU. IC Role / Device Role / Timing Role: Secondary regulated supply supporting communication stack timing margins and ESD-robust PHY interfaces. Use Value: ±1% reference accuracy ensures CAN FD bit timing compliance under ±10% input variation-avoids frame errors during load-dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR50410YFQDBVRQ1 | Same FPWM architecture and 2.1-MHz frequency, but adjustable output (requires external FB divider). | Used where multiple output voltages are needed on same PCB or where post-production trimming is required. | Select when flexibility in output voltage outweighs BOM simplicity-adds two 1% resistors and layout sensitivity. |
| TPS560430QDBVRQ1 | Pin-to-pin compatible; identical SOT-23-6 package and 2.1-MHz FPWM operation, but 3.3-V fixed version not offered-only adjustable variant available. | Requires external feedback network for 3.3-V output; lacks factory-trimmed reference of LMR50410Y3FQDBVRQ1. | Choose if existing design uses TPS560430-Q1 and only minor validation is needed-no PCB change, but adds FB resistors and calibration risk. |
Compared with LMR50410YFQDBVRQ1, the LMR50410Y3FQDBVRQ1 eliminates feedback resistors and associated tolerance drift, improving long-term output stability; compared with TPS560430QDBVRQ1, it provides guaranteed 3.3-V accuracy without external component dependencies-reducing qualification effort for safety-critical automotive functions.
Availability
LMR50410Y3FQDBVRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply with AEC-Q100 qualification and long-term production continuity.
Supply support for LMR50410Y3FQDBVRQ1 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 manufacturing scale.
The LMR50410-Q1 product line delivers compact, AEC-Q100-qualified buck converters for automotive power conditioning-designed specifically for body electronics, infotainment, and ADAS subsystems needing wide-input, low-noise, and thermally robust DC/DC conversion.
FAQ
What is the output voltage tolerance of the LMR50410Y3FQDBVRQ1 over temperature and line?
The LMR50410Y3FQDBVRQ1 delivers 3.3 V with ±1.5% regulation over the full operating junction temperature range (–40°C to +150°C) and input voltage range (4 V to 36 V), as specified in Section 7.8 System Characteristics of the datasheet. This tolerance includes effects of line, load, and temperature variation-no external calibration is required due to factory trimming of the internal reference and feedback path.
Does the LMR50410Y3FQDBVRQ1 require external feedback resistors?
No, the LMR50410Y3FQDBVRQ1 does not require external feedback resistors. It is a fixed 3.3-V output variant with the feedback network integrated internally-pin FB is directly connected to the output node inside the IC. This eliminates resistor tolerance errors, temperature drift, and PCB layout sensitivity associated with external dividers, simplifying design and improving long-term stability.
What protection features are built into the LMR50410Y3FQDBVRQ1?
The LMR50410Y3FQDBVRQ1 includes cycle-by-cycle current limiting, hiccup-mode short-circuit protection (with 135-ms retry interval), thermal shutdown at 170°C, input undervoltage lockout (UVLO) with 3.75-V rising threshold, and precision enable with hysteresis. These features collectively prevent damage during fault conditions such as output shorts, overtemperature, or brownout-ensuring robust operation in automotive environments.
Can the LMR50410Y3FQDBVRQ1 operate during automotive cold-crank conditions?
Yes, the LMR50410Y3FQDBVRQ1 supports cold-crank operation down to 4 V input-meeting typical automotive battery minimums during cranking. Its 60-ns minimum on-time and frequency foldback capability maintain regulation even at 6-V input, ensuring uninterrupted 3.3-V supply to critical microcontrollers and sensors without dropout or reset events.
Is the LMR50410Y3FQDBVRQ1 pin-compatible with other devices in the same family?
Yes, the LMR50410Y3FQDBVRQ1 shares the same SOT-23-6 (DBV) package and pinout with other members of the LMR50410-Q1 family-including LMR50410YFQDBVRQ1 (FPWM adjustable) and LMR50410YQDBVRQ1 (PFM adjustable)-as well as the pin-compatible TPS560430-Q1 series. This enables flexible sourcing and design reuse across voltage and control-mode variants without PCB redesign.
LMR50410Y3FQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- SOT-23-6
- 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):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
LMR50410Y3FQDBVRQ1 FAQ
1.How can I place an order for LMR50410Y3FQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR50410Y3FQDBVRQ1 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 LMR50410Y3FQDBVRQ1 reliable?
The price and inventory of LMR50410Y3FQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR50410Y3FQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for LMR50410Y3FQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR50410Y3FQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR50410Y3FQDBVRQ1?
LMR50410Y3FQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR50410Y3FQDBVRQ1 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 LMR50410Y3FQDBVRQ1?
For technical support, including LMR50410Y3FQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR50410Y3FQDBVRQ1 requirements.
6.How does Aetrix verify that LMR50410Y3FQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR50410Y3FQDBVRQ1 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 LMR50410Y3FQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of LMR50410Y3FQDBVRQ1?
All LMR50410Y3FQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR50410Y3FQDBVRQ1, 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 LMR50410Y3FQDBVRQ1 part is unused and in its original packaging.
Return procedure for LMR50410Y3FQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LMR50410Y3FQDBVRQ1 Tags
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