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Texas Instruments LMR14050SQDPRRQ1
- Part No.:
- LMR14050SQDPRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LMR14050SQDPRRQ1.pdf
- Description:
- IC REG BUCK ADJ 5A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:524
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Product details
Overview
LMR14050SQDPRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade synchronous step-down DC-DC converter with integrated 90 mΩ high-side MOSFET, delivering 5 A continuous output current across a 4 V to 40 V input range, ultra-low 40 µA quiescent current in sleep mode, and support for spread-spectrum EMI reduction - deployed in battery regulation and ADAS power rails.
For engineers reviewing the LMR14050SQDPRRQ1 datasheet, LMR14050SQDPRRQ1 pinout, LMR14050SQDPRRQ1 application, or LMR14050SQDPRRQ1 equivalent, key selection considerations include its 10-pin WSON package with exposed thermal pad, 75 ns minimum on-time, adjustable 200 kHz–2.5 MHz switching frequency, precision enable threshold (1.2 V), and internal compensation eliminating external loop components.
Technical Context
The LMR14050SQDPRRQ1 implements fixed-frequency peak current mode control with slope compensation to prevent sub-harmonic oscillation above 50% duty cycle. Its sleep-mode operation reduces switching losses at light load by clamping COMP voltage at 400 mV and drawing only 40 µA IQ.
It supports both resistor-programmed timing (RT/SYNC pin) and external clock synchronization (250 kHz–2.3 MHz), with built-in spread-spectrum dithering (±6%) and BOOT capacitor recharge circuit enabling up to 97% effective duty cycle during dropout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V - supports direct connection to automotive battery (cold-crank down to 4 V) without pre-regulation. |
| Output Current | 5 A continuous - sufficient for powering radar modules, camera ISPs, or domain controllers without external current boosting. |
| Quiescent Current | 40 µA in sleep mode - extends battery life in always-on vehicle systems such as telematics or intrusion detection. |
| Switching Frequency | 200 kHz to 2.5 MHz - enables optimization between efficiency (low fSW) and component size (high fSW). |
| High-Side RDS(on) | 90 mΩ typical - minimizes conduction loss and thermal rise at full load in compact 4 mm × 4 mm WSON package. |
| Feedback Reference | 0.750 V ±1.5% over –40°C to +125°C - ensures stable output regulation across automotive temperature extremes. |
| Min. On-Time | 75 ns - supports high VIN-to-VOUT conversion ratios (e.g., 24 V → 3.3 V) without pulse-skipping instability. |
Pinout & Package
LMR14050SQDPRRQ1 uses a 10-pin WSON package (DPR) with 4 mm × 4 mm footprint and exposed thermal pad for low RθJC(bot) = 3.1 °C/W - optimized for high-power density automotive PCB layouts requiring minimal board area and robust thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary input supply connection (4–40 V); requires local high-frequency bypass capacitor to GND with minimal loop inductance. |
| BOOT | Bootstrap Supply | Connects 0.1 µF ceramic capacitor to SW; supplies gate drive voltage for integrated high-side MOSFET. |
| SW | Switch Node | Drives external power inductor; connects internally to drain of high-side MOSFET and source of low-side switch. |
| EN | Enable Control | Logic-level input with 1.2 V threshold and internal pull-up; supports system sequencing and adjustable UVLO via resistor divider. |
| RT/SYNC | Frequency Control | Configurable as resistor-set oscillator input or high-impedance clock sync input (250 kHz–2.3 MHz) with PLL lock-in time <100 µs. |
| FB | Feedback Sense | Monitors output voltage via resistive divider; internal 0.75 V reference enables precise VOUT setting from 0.8 V to 28 V. |
| SS | Soft-Start Control | Accepts external capacitor (≤4.7 nF) to program controlled output ramp time and limit inrush current. |
| PGOOD | Power-Good Flag | Open-drain output asserting when VOUT is within ±3% of target; requires external pull-up to ≤7 V logic rail. |
| GND | System Ground | Signal and power return path; must be connected to PCB ground plane under exposed thermal pad. |
| Thermal Pad | Heat Dissipation | Electrically connected to GND; primary thermal path with RθJB = 13.6 °C/W - requires solder mask defined thermal relief and ≥6 thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ±2 kV and CDM ±750 V ESD robustness - suitable for front-end ADAS ECUs. |
| Spread-spectrum EMI reduction | ±6% frequency dithering centered on programmed fSW - lowers peak radiated emissions without filter redesign. |
| Internal loop compensation | Eliminates need for external Type II/III compensation network - reduces BOM count and layout sensitivity to output capacitor ESR. |
| Ultra-low shutdown current | 1 µA max at VEN = 0 V - preserves battery charge during vehicle sleep modes exceeding 10 days. |
| Adjustable UVLO hysteresis | Enabled via EN pin resistor divider; allows precise system-level brown-out protection independent of VIN UVLO thresholds. |
Applications
| Automotive Battery Regulation | ADAS Power Management |
|---|---|
Use Scenario: Regulating 12 V battery supply to stable 5 V/3.3 V rails for infotainment head units and body control modules during cold-crank (4.5 V transients). IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, low-noise power with sleep-mode IQ management for always-on CAN gateway functions. Use Value: 40 µA quiescent current prevents parasitic drain during vehicle off-state; 40 V max input withstands load-dump surges up to 44 V. | Use Scenario: Powering 77 GHz radar sensor SoCs requiring clean, tightly regulated 1.2 V core and 3.3 V I/O rails in compact front-bumper modules. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with spread-spectrum operation to meet CISPR-25 Class 5 radiated emission limits. Use Value: 75 ns min on-time enables direct 12 V → 1.2 V conversion; 90 mΩ RDS(on) limits thermal rise in sealed enclosures. |
| Industrial Telematics | Commercial Vehicle Telematics |
Use Scenario: Converting wide-range 9–36 V truck battery supply to 5 V for GPS/GNSS receivers and LTE modems operating in harsh vibration environments. IC Role / Device Role / Timing Role: Robust DC-DC stage with thermal shutdown (170°C) and cycle-by-cycle current limiting to survive alternator ripple and jump-start transients. Use Value: AEC-Q100 qualification ensures reliability under extended temperature cycling; 10-pin WSON package resists mechanical stress better than SOIC. | Use Scenario: Powering fleet management ECUs that remain active during multi-week parking periods, requiring ultra-low standby consumption. IC Role / Device Role / Timing Role: Sleep-mode buck regulator with 1 µA shutdown current and precision enable input for controlled wake-up via CAN bus activity. Use Value: Enables >30-day battery hold-up without auxiliary power; PGOOD flag synchronizes microcontroller boot sequence with rail stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14030SQDPRRQ1 | 3.5 A output current, identical 10-pin WSON package and pinout, same 4–40 V input range and 40 µA IQ. | Lower current capability suits lower-power ADAS cameras or gateway MCUs where 5 A headroom is unnecessary. | Select when thermal margin or cost optimization is prioritized over maximum load capacity. |
| TPS54560QDDARQ1 | 5 A output but 6–60 V input range, SOIC-8 package, no spread spectrum, higher 120 µA IQ, external compensation required. | Better suited for industrial 24/48 V systems; lacks automotive thermal grade and EMI features needed for passenger vehicle integration. | Choose only if wider input range outweighs EMI compliance and thermal performance requirements. |
Compared with LMR14050SQDPRRQ1, LMR14030SQDPRRQ1 offers identical footprint and feature set at reduced current rating - ideal for cost-sensitive scaling - while TPS54560QDDARQ1 trades automotive qualification and integrated EMI mitigation for broader industrial input coverage and legacy SOIC compatibility.
Availability
LMR14050SQDPRRQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, ADAS power management, and commercial vehicle telematics requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for LMR14050SQDPRRQ1 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 deep expertise in automotive power management ICs and functional safety design.
The LMR14050-Q1 product line delivers SIMPLE SWITCHER® automotive-grade buck converters focused on high-reliability, low-EMI, and ultra-low-IQ operation for next-generation vehicle electrification and ADAS subsystems.
FAQ
What is the maximum input voltage rating for the LMR14050SQDPRRQ1?
The LMR14050SQDPRRQ1 has an absolute maximum input voltage rating of 44 V, with recommended operating range from 4 V to 40 V. This allows safe operation during automotive load-dump events up to 44 V while maintaining regulation across cold-crank (down to 4 V) and normal battery conditions (12–14 V or 24–28 V).
Does the LMR14050SQDPRRQ1 require external compensation components?
No, the LMR14050SQDPRRQ1 features fully internal loop compensation, eliminating the need for external Type II or Type III compensation networks. This simplifies design, reduces bill-of-materials count, and improves immunity to output capacitor ESR variations - confirmed in Section 6.3.1 and Table 5.5 of the official datasheet.
What package type does the LMR14050SQDPRRQ1 use, and how is thermal performance achieved?
The LMR14050SQDPRRQ1 uses a 10-pin WSON package (DPR) with 4 mm × 4 mm footprint and exposed thermal pad. Thermal performance is achieved via low junction-to-board resistance (RθJB = 13.6 °C/W) and mandatory connection of the thermal pad to a solid ground plane using ≥6 thermal vias - detailed in Section 5.4 and Figure 4-2 of the datasheet.
Can the LMR14050SQDPRRQ1 synchronize to an external clock, and what are the valid frequency ranges?
Yes, the LMR14050SQDPRRQ1 supports external clock synchronization on the RT/SYNC pin across 250 kHz to 2.3 MHz. The internal PLL locks within 100 µs, and the pin transitions from resistor-timing mode to high-impedance clock input when pulled above 1.7 V - specified in Section 5.6 and Figure 6-5 of the datasheet.
Is spread-spectrum operation enabled by default on the LMR14050SQDPRRQ1?
Yes, the LMR14050SQDPRRQ1 variant suffix "S" in LMR14050SQDPRRQ1 denotes factory-enabled spread-spectrum mode, providing ±6% frequency dithering around the programmed center frequency to reduce peak EMI - explicitly documented in the device information table and Section 6.3.8 of the datasheet.
LMR14050SQDPRRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 10-WDFN Exposed Pad
- 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):
- 4V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 28V
- Current - Output:
- 5A
- Frequency - Switching:
- 200kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (4x4)
LMR14050SQDPRRQ1 FAQ
1.How can I place an order for LMR14050SQDPRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14050SQDPRRQ1 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 LMR14050SQDPRRQ1 reliable?
The price and inventory of LMR14050SQDPRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14050SQDPRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR14050SQDPRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14050SQDPRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14050SQDPRRQ1?
LMR14050SQDPRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14050SQDPRRQ1 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 LMR14050SQDPRRQ1?
For technical support, including LMR14050SQDPRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14050SQDPRRQ1 requirements.
6.How does Aetrix verify that LMR14050SQDPRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14050SQDPRRQ1 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 LMR14050SQDPRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR14050SQDPRRQ1?
All LMR14050SQDPRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14050SQDPRRQ1, 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 LMR14050SQDPRRQ1 part is unused and in its original packaging.
Return procedure for LMR14050SQDPRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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