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Texas Instruments LMR14030QDPRRQ1
- Part No.:
- LMR14030QDPRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LMR14030QDPRRQ1.pdf
- Description:
- IC REG BUCK ADJ 3.5A 10WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR14030QDPRRQ1 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 10-pin WSON package with exposed thermal pad. It delivers regulated power for battery-fed vehicle subsystems requiring low standby consumption and wide input tolerance.
For engineers reviewing the LMR14030QDPRRQ1 datasheet, LMR14030QDPRRQ1 pinout, LMR14030QDPRRQ1 application, or LMR14030QDPRRQ1 equivalent, key selection considerations include its 75 ns minimum on-time, adjustable 200 kHz–2.5 MHz switching frequency, spread-spectrum EMI reduction, internal compensation, and precision enable with programmable UVLO hysteresis.
Technical Context
The LMR14030QDPRRQ1 implements fixed-frequency peak current mode control with slope compensation to ensure stability at duty cycles >50%, and enters Sleep-mode below ~300 mA load to maintain 40 µA IQ. Its BOOT capacitor recharge circuit supports up to ~97% effective duty cycle during dropout operation.
It features a fully integrated feedback loop with 0.750 V ±1.5% reference voltage, internal error amplifier, and compensation-eliminating external compensation components. Frequency programming via RT resistor or synchronization to external clock (250 kHz–2.3 MHz) enables layout- and efficiency-optimized design across automotive and industrial applications.
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 unregulated rails. |
| Output Current | 3.5 A continuous - sufficient for powering ADAS sensors, infotainment SoCs, or body control modules. |
| Quiescent Current | 40 µA in sleep mode - extends battery life in always-on vehicle systems like telematics or alarm controllers. |
| Switching Frequency | 200 kHz to 2.5 MHz - selectable via RT resistor or external SYNC clock; higher frequencies reduce inductor size. |
| Feedback Reference | 0.750 V ±1.5% over –40°C to +125°C - enables accurate output regulation across full automotive temperature range. |
| High-Side RDS(on) | 90 mΩ typical - minimizes conduction loss and thermal rise at full load in compact WSON-10 package. |
| Min. On-Time | 75 ns - enables high VIN-to-low VOUT conversion (e.g., 24 V → 3.3 V) without pulse-skipping artifacts. |
Pinout & Package
LMR14030QDPRRQ1 is housed in a 10-pin WSON package (4 mm × 4 mm) with exposed thermal pad (Pin 11), optimized for low thermal resistance (RθJA = 36.5°C/W) and high-power density in space-constrained automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT (Pin 1) | Bootstrap supply | Connects 0.1 µF ceramic capacitor to SW; supplies gate drive voltage for integrated high-side MOSFET. |
| VIN (Pins 2,3) | Main power input | Accepts 4–40 V input; requires local high-frequency bypass capacitors placed near these pins for stable operation. |
| EN (Pin 4) | Enable control | Logic-level input with 1.2 V threshold and internal pull-up; supports precision UVLO via external resistor divider. |
| RT/SYNC (Pin 5) | Frequency control | Configurable as resistor-set oscillator input or high-impedance clock sync node (250 kHz–2.3 MHz). |
| FB (Pin 7) | Output voltage sense | Connects to resistor divider; regulates output using internal 0.75 V reference; avoid grounding during operation. |
| SS (Pin 6) | Soft-start timing | Charged by internal 3 µA current source; sets output ramp time (CSS ≤ 4.7 nF for WSON package). |
| PGOOD (Pin 8) | Power-good flag | Open-drain output asserting when VOUT is within ±3% of target; requires external pull-up ≤100 kΩ. |
| GND (Pin 9) | System ground | Reference for all analog and power circuits; must be connected to PCB ground plane with low-inductance path. |
| SW (Pin 10) | Power switch node | Drives external inductor; connects internally to high-side MOSFET drain; requires short, low-impedance trace. |
| Thermal Pad (Pin 11) | Heat dissipation | Exposed copper pad; must be soldered to solid ground plane for thermal performance and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2 kV, CDM ±750 V - meets automotive reliability requirements. |
| Sleep-mode with 40 µA IQ | Reduces no-load power draw in always-on systems (e.g., CAN gateway wake-up receivers) without sacrificing regulation accuracy. |
| Internal loop compensation | Eliminates need for external compensation network - simplifies design, reduces BOM count, and improves robustness across capacitor types. |
| Spread-spectrum EMI reduction | Dithers switching frequency ±6% around center value - lowers peak radiated emissions to ease EMC compliance in dense vehicle ECUs. |
| 97% max duty cycle support | Enables high-VIN-to-low-VOUT conversion (e.g., 24 V → 3.3 V) with minimal dropout voltage, critical for cold-crank scenarios. |
| Programmable soft-start (CSS) | Prevents inrush current into output capacitors and downstream loads - configurable from <1 ms to >100 ms via external capacitor. |
Applications
| Automotive Battery Regulation | ADAS Sensor Power Supply |
|---|---|
|
Use Scenario: Regulating 12 V/24 V battery rail to stable 5 V or 3.3 V for camera modules, radar transceivers, or ultrasonic parking sensors. IC Role / Device Role / Timing Role: Primary buck regulator delivering clean, low-noise, and thermally efficient power under wide input transients including load dump and cold crank. Use Value: 40 µA sleep current preserves battery during vehicle off-state; 75 ns min on-time ensures regulation even at 24 V → 3.3 V with high duty cycle. |
Use Scenario: Powering vision-processing SoCs and image signal processors in forward-facing cameras with strict thermal and EMI limits. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter synchronized to system clock to minimize beat-frequency noise in analog video paths. Use Value: Spread-spectrum mode reduces EMI peaks interfering with RF bands; internal compensation avoids layout sensitivity in high-speed imaging PCBs. |
| Industrial Control Unit | Telematics Gateway |
|
Use Scenario: Providing isolated 5 V and 3.3 V rails for PLC I/O modules, motor drivers, or fieldbus interfaces operating from 24 V industrial supply. IC Role / Device Role / Timing Role: Robust primary DC-DC stage handling line surges, reverse polarity, and extended temperature cycling in factory environments. Use Value: 40 V absolute max input withstands 36 V transients per IEC 61000-4-5; thermal shutdown and OVP protect against fault conditions. |
Use Scenario: Powering LTE/C-V2X modems, GPS receivers, and CAN/FlexRay interface ICs in vehicle telematics units with cellular connectivity. IC Role / Device Role / Timing Role: Low-quiescent-current buck converter enabling "always-on" modem wake-up capability while meeting OEM battery drain budgets. Use Value: 1 µA shutdown current prevents parasitic drain; PGOOD flag enables safe firmware-controlled power sequencing during boot and sleep transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14020QDPRRQ1 | 2 A output current, identical 10-pin WSON package and pinout, same 4–40 V input range and 40 µA IQ. | Lower current capacity suits lower-power modules (e.g., LIN gateways, interior lighting controllers) where 3.5 A headroom is unnecessary. | Select when load current remains ≤2 A and board space/layout reuse is prioritized over margin. |
| LMR14050QDPRRQ1 | 5 A output current, same package footprint and pinout, identical feature set including spread spectrum and SYNC capability. | Higher current delivery supports multi-rail SoC power domains or dual-sensor fusion units requiring >3.5 A combined load. | Choose for future-proofing or designs with peak transient loads exceeding 3.5 A, with no PCB change required. |
Compared with LMR14030QDPRRQ1, the LMR14020QDPRRQ1 offers reduced cost and thermal footprint for lighter loads, while the LMR14050QDPRRQ1 provides headroom for higher-current or multi-output configurations-all sharing identical layout, control interface, and qualification status.
Availability
LMR14030QDPRRQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, ADAS sensor power supply, and industrial control unit applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.
Supply support for LMR14030QDPRRQ1 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 power management technologies, with deep expertise in automotive-grade IC design and manufacturing.
The LMR14030QDPRRQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family, engineered specifically for reliable, low-EMI, wide-input DC-DC conversion in safety-critical vehicle subsystems.
FAQ
What is the maximum input voltage rating for the LMR14030QDPRRQ1?
The LMR14030QDPRRQ1 has an absolute maximum input voltage rating of 44 V, with recommended operating input range from 4 V to 40 V. This allows robust operation during automotive load-dump events (up to 40 V sustained) and cold-crank conditions (down to 4 V), while maintaining functional integrity per AEC-Q100 Grade 1 specifications.
Does the LMR14030QDPRRQ1 require external compensation components?
No, the LMR14030QDPRRQ1 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 capacitor aging and temperature drift-critical for automotive reliability validation of the LMR14030QDPRRQ1.
How does the LMR14030QDPRRQ1 achieve ultra-low quiescent current?
The LMR14030QDPRRQ1 achieves 40 µA quiescent current through Sleep-mode operation: when load current drops below ~300 mA, it disables switching and clamps the internal COMP voltage at 400 mV, drawing only bias current. In shutdown (EN < 1.2 V), it further reduces to 1 µA-enabling extended battery life in always-on vehicle functions powered by the LMR14030QDPRRQ1.
Can the LMR14030QDPRRQ1 be synchronized to an external clock?
Yes, the LMR14030QDPRRQ1 supports frequency synchronization via its RT/SYNC pin, accepting external clock signals from 250 kHz to 2.3 MHz. When the pin voltage exceeds the PLL upper threshold (~1.7 V), the internal oscillator locks to the falling edge of the external clock-enabling EMI reduction through deterministic switching alignment in systems with multiple LMR14030QDPRRQ1 regulators.
What package type and thermal characteristics does the LMR14030QDPRRQ1 use?
The LMR14030QDPRRQ1 uses a 10-pin WSON package (4 mm × 4 mm) with exposed thermal pad (Pin 11). Its junction-to-ambient thermal resistance is 36.5°C/W, and junction-to-board is 13.6°C/W-enabling 3.5 A continuous operation with minimal heatsinking when the thermal pad is properly soldered to a multilayer PCB ground plane.
LMR14030QDPRRQ1 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)
LMR14030QDPRRQ1 FAQ
1.How can I place an order for LMR14030QDPRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14030QDPRRQ1 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 LMR14030QDPRRQ1 reliable?
The price and inventory of LMR14030QDPRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14030QDPRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR14030QDPRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14030QDPRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14030QDPRRQ1?
LMR14030QDPRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14030QDPRRQ1 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 LMR14030QDPRRQ1?
For technical support, including LMR14030QDPRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14030QDPRRQ1 requirements.
6.How does Aetrix verify that LMR14030QDPRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14030QDPRRQ1 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 LMR14030QDPRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR14030QDPRRQ1?
All LMR14030QDPRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14030QDPRRQ1, 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 LMR14030QDPRRQ1 part is unused and in its original packaging.
Return procedure for LMR14030QDPRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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