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Texas Instruments LMR14030SQDPRRQ1
- Part No.:
- LMR14030SQDPRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LMR14030SQDPRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3.5A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,160
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Product details
Overview
LMR14030SQDPRRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade synchronous step-down DC-DC converter with integrated 90 mΩ high-side MOSFET, 4 V to 40 V input range, 3.5 A continuous output current, 40 µA quiescent current in sleep mode, and spread-spectrum EMI reduction - designed for battery regulation in engine control units and ADAS domain controllers.
For engineers reviewing the LMR14030SQDPRRQ1 datasheet, LMR14030SQDPRRQ1 pinout, LMR14030SQDPRRQ1 application, or LMR14030SQDPRRQ1 equivalent, key selection considerations include its WSON-10 package thermal performance (RθJC(bot) = 3.1 °C/W), 75 ns minimum on-time for high VIN/VOUT ratios, precision enable threshold (1.2 V typ), and RT/SYNC dual-mode frequency control (200 kHz–2.5 MHz).
Technical Context
The LMR14030SQDPRRQ1 implements fixed-frequency peak current mode control with internal compensation and slope compensation to prevent subharmonic oscillation above 50% duty cycle. It supports both resistor-programmed (RT-to-GND) and external clock synchronization (250 kHz–2.3 MHz) modes via the same RT/SYNC pin.
Sleep-mode operation reduces switching losses at light load by clamping COMP voltage at 400 mV and disabling the high-side MOSFET until output droop triggers recovery - achieving 40 µA IQ while maintaining regulation. Its bootstrap circuit enables up to 97% effective duty cycle, supported by a dedicated BOOT pin and internal low-side switch for BOOT capacitor recharge during dropout.
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) and industrial 24 V/36 V rails without pre-regulation. |
| Output Current | 3.5 A continuous - delivers full rated load at TA = 125°C in WSON-10 package with PCB thermal relief. |
| Quiescent Current | 40 µA in sleep mode - extends battery runtime in always-on vehicle modules (e.g., telematics, body ECUs). |
| Switching Frequency | 200 kHz to 2.5 MHz - adjustable via RT resistor or external clock; higher frequencies reduce inductor size, lower frequencies improve light-load efficiency. |
| High-Side RDS(on) | 90 mΩ (typ) - minimizes conduction loss at 3.5 A, enabling >90% efficiency at 12 VIN/5 VOUT @ 2 A. |
| Min. On-Time | 75 ns - enables high step-down ratios (e.g., 36 V → 3.3 V at 2.2 MHz) without pulse-skipping instability. |
| Feedback Reference | 0.750 V ±1.2% (–40°C to 125°C) - sets output accuracy; supports precise 3.3 V, 5 V, or custom voltages with 1% resistors. |
| Thermal Resistance | RθJC(bot) = 3.1 °C/W - enables direct die-to-PCB heat transfer via exposed thermal pad, critical for automotive under-hood operation. |
Pinout & Package
LMR14030SQDPRRQ1 uses a 10-pin WSON package (4 mm × 4 mm) with exposed thermal pad (Pin 11) for low-junction-to-board thermal resistance (RθJB = 13.6 °C/W). The package is RoHS-compliant and moisture-sensitive level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Power Input | Main input supply connection; bypassed externally with high-frequency ceramic capacitor to minimize noise injection. |
| 2,3 GND | Ground Return | Dual ground pins reduce impedance path for high di/dt return currents; must connect directly to solid ground plane. |
| 4 EN | Enable Control | Logic-level enable with 1.2 V threshold and internal 1 µA pull-up; supports system power sequencing and UVLO customization via resistor divider. |
| 5 RT/SYNC | Frequency Control | Dual-function pin: sets switching frequency via RT resistor (200 kHz–2.5 MHz) or accepts external sync clock (250 kHz–2.3 MHz). |
| 6 SS | Soft-Start Timing | Connects to external capacitor (max 4.7 nF) to program controlled output ramp; prevents inrush current during startup. |
| 7 FB | Voltage Feedback | High-impedance input sensing output voltage via resistor divider; 0.75 V reference enables accurate regulation across temperature. |
| 8 PGOOD | Power-Good Flag | Open-drain output asserting when VOUT is within ±3% of target; requires external pull-up to logic rail ≤7 V. |
| 9,10 SW | Switch Node | Drives external power inductor; high di/dt node requiring tight layout and minimal trace length to reduce EMI. |
| 11 Thermal Pad | Heat Dissipation | Exposed copper pad (Pin 11) - must be soldered to ≥2 cm² internal/external ground plane for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | Reduces peak EMI by ±6% frequency dithering - meets CISPR 25 Class 5 requirements without added shielding or filters. |
| Internal loop compensation | Eliminates need for external compensation network - reduces BOM count and design iteration time for stable operation. |
| Precision enable with UVLO hysteresis | EN threshold (1.2 V) + programmable hysteresis via external resistors - enables robust system-level brownout protection. |
| Ultra-low shutdown current | 1 µA max shutdown IQ - preserves battery charge during vehicle sleep mode (e.g., parking surveillance systems). |
| Thermal & fault protection | Integrated thermal shutdown (170°C), cycle-by-cycle current limit, output overvoltage protection, and short-circuit foldback - ensures safe operation under fault conditions. |
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to 125°C ambient), HBM ±2 kV, CDM ±750 V - validated for under-hood and safety-critical applications. |
Applications
| Automotive Battery Regulation | ADAS Domain Controller Power |
|---|---|
|
Use Scenario: Regulating 12 V battery supply to 5 V/3.3 V for infotainment head units and gateway ECUs during cold-crank (4 V min) and load-dump (40 V max) transients. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, low-noise, and thermally robust power conversion with spread-spectrum EMI control. Use Value: Maintains regulation across full automotive voltage range while meeting strict EMC limits and junction temperature constraints (TJ ≤ 125°C). |
Use Scenario: Powering SoC, memory, and sensor interfaces in radar or camera domain controllers requiring high PSRR and fast transient response. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with 75 ns min on-time enabling 36 V→3.3 V conversion at 2.2 MHz. Use Value: Enables compact 2-layer PCB layout with small inductors and achieves <1% load regulation across 0.1–3.5 A load steps. |
| Industrial PLC I/O Module | Telematics Control Unit (TCU) |
|
Use Scenario: Converting 24 V industrial bus to 5 V for digital I/O drivers and communication interfaces in harsh factory environments. IC Role / Device Role / Timing Role: Robust wide-input buck converter with thermal shutdown and overvoltage protection for unattended operation. Use Value: Delivers 3.5 A continuously at 70°C ambient with no derating, supported by RθJC(bot) = 3.1 °C/W thermal path. |
Use Scenario: Supplying LTE modem, GNSS receiver, and microcontroller in always-connected vehicle telematics units with multi-year battery backup. IC Role / Device Role / Timing Role: Ultra-low-IQ buck regulator enabling >10-year battery life in sleep mode via 40 µA quiescent current. Use Value: Extends backup battery life by 3× vs conventional buck converters, while supporting fast wake-up via precision enable input. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14030QDPRRQ1 | No spread-spectrum feature; identical pinout, specs, and thermal performance. | Lacks EMI reduction - suitable where board-level filtering suffices and cost sensitivity outweighs EMC margin. | Select LMR14030QDPRRQ1 only if spread-spectrum is unnecessary and BOM cost reduction is prioritized. |
| LMR14050SQDPRRQ1 | 5 A output rating, same 4–40 V input, 40 µA IQ, and WSON-10 package - pin-compatible upgrade path. | Supports higher-power loads (e.g., multi-core ADAS SoCs); requires larger inductor and output capacitance. | Choose LMR14050SQDPRRQ1 when future-proofing for >3.5 A loads or designing scalable power architecture. |
Compared with LMR14030QDPRRQ1, the LMR14030SQDPRRQ1 adds spread-spectrum EMI reduction without sacrificing efficiency or thermal performance; versus LMR14050SQDPRRQ1, it offers optimal cost/size trade-off for 3.5 A applications without overdesign.
Availability
LMR14030SQDPRRQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, ADAS domain controller power, and industrial PLC I/O modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMR14030SQDPRRQ1 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 IC design expertise and AEC-Q100 validation infrastructure.
The LMR14030SQDPRRQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family - engineered specifically for high-reliability, wide-input, low-quiescent-current DC-DC conversion in engine compartments and safety-critical domains.
FAQ
What is the maximum input voltage rating for the LMR14030SQDPRRQ1?
The LMR14030SQDPRRQ1 has an absolute maximum input voltage rating of 44 V, with recommended operating range from 4 V to 40 V. This allows reliable operation during automotive load-dump events (up to 40 V) while maintaining functional safety margins per AEC-Q100 stress guidelines.
Does the LMR14030SQDPRRQ1 require external compensation components?
No, the LMR14030SQDPRRQ1 features fully internal loop compensation. This eliminates the need for external Type II or Type III compensation networks, reducing component count, PCB area, and design validation effort while ensuring stable operation across all qualified output capacitors.
How does the spread-spectrum feature in the LMR14030SQDPRRQ1 reduce EMI?
The LMR14030SQDPRRQ1 modulates its switching frequency by ±6% around the center value, spreading energy across a wider bandwidth. This lowers peak radiated emissions by up to 10 dB, helping designs meet stringent CISPR 25 Class 5 automotive EMC requirements without additional ferrites or shielding.
What is the thermal pad connection requirement for the LMR14030SQDPRRQ1 WSON package?
The exposed thermal pad (Pin 11) of the LMR14030SQDPRRQ1 must be soldered to a minimum 2 cm² copper area on an internal or external PCB ground plane. This establishes the primary heat dissipation path, achieving RθJC(bot) = 3.1 °C/W and enabling full 3.5 A output at 125°C ambient.
Can the LMR14030SQDPRRQ1 synchronize to an external clock, and what are the timing requirements?
Yes, the LMR14030SQDPRRQ1 supports external clock synchronization on the RT/SYNC pin across 250 kHz–2.3 MHz. Required signal levels are VHIGH ≥ 1.7 V, VLOW ≤ 0.5 V, and minimum pulse width ≥ 30 ns, with lock-in time of 100 µs after clock initiation.
LMR14030SQDPRRQ1 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:
- 3.5A
- 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)
LMR14030SQDPRRQ1 FAQ
1.How can I place an order for LMR14030SQDPRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14030SQDPRRQ1 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 LMR14030SQDPRRQ1 reliable?
The price and inventory of LMR14030SQDPRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14030SQDPRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR14030SQDPRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14030SQDPRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14030SQDPRRQ1?
LMR14030SQDPRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14030SQDPRRQ1 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 LMR14030SQDPRRQ1?
For technical support, including LMR14030SQDPRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14030SQDPRRQ1 requirements.
6.How does Aetrix verify that LMR14030SQDPRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14030SQDPRRQ1 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 LMR14030SQDPRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR14030SQDPRRQ1?
All LMR14030SQDPRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14030SQDPRRQ1, 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 LMR14030SQDPRRQ1 part is unused and in its original packaging.
Return procedure for LMR14030SQDPRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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