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Texas Instruments LMR14030SQDDARQ1
- Part No.:
- LMR14030SQDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR14030SQDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 3.5A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:10,458
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Product details
Overview
LMR14030SQDDARQ1 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 adjustable 200 kHz–2.5 MHz switching frequency. It delivers regulated power in battery-supplied vehicle subsystems such as infotainment and ADAS domain controllers.
For engineers reviewing the LMR14030SQDDARQ1 datasheet, LMR14030SQDDARQ1 pinout, LMR14030SQDDARQ1 application, or LMR14030SQDDARQ1 equivalent, key selection considerations include its ultra-low IQ for always-on systems, spread-spectrum EMI reduction capability, precision enable with adjustable UVLO, internal compensation for minimal external components, and thermal robustness in the HSOIC-8 PowerPAD™ package.
Technical Context
The LMR14030SQDDARQ1 implements fixed-frequency peak current mode control with slope compensation to ensure stability at >50% duty cycles. Its Sleep-mode dynamically reduces switching activity below ~300 mA load, maintaining 40 µA IQ while preserving regulation via COMP voltage clamping and recovery.
It supports both resistor-programmed (RT/SYNC pin to GND) and external clock synchronization (250 kHz–2.3 MHz), with built-in PLL lock detection and automatic fallback to RT mode if sync signal fails. The BOOT capacitor recharge circuit enables up to 97% effective duty cycle during low-VIN 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) and wide industrial rails without pre-regulation. |
| Output Current | 3.5 A continuous - sufficient for powering multi-rail SoCs, CAN transceivers, and sensor hubs in automotive ECUs. |
| Quiescent Current | 40 µA in Sleep-mode - extends battery life in always-on modules (e.g., telematics, gateway wake-up circuits). |
| Switching Frequency | 200 kHz to 2.5 MHz - allows trade-off between efficiency (low fSW) and solution size (high fSW with smaller inductors/caps). |
| High-Side RDS(on) | 90 mΩ typical - minimizes conduction loss at full load, enabling >90% efficiency at 12 VIN/5 VOUT @ 3 A. |
| Feedback Reference | 0.750 V ±1.2% over –40°C to +125°C - ensures accurate output regulation across automotive temperature range. |
| Min. On-Time | 75 ns - supports high VIN-to-low VOUT conversion (e.g., 36 V → 3.3 V) without pulse-skipping instability. |
| Thermal Shutdown | 170°C with 12°C hysteresis - protects against sustained overload or poor PCB heatsinking in enclosed enclosures. |
Pinout & Package
LMR14030SQDDARQ1 uses the 8-pin HSOIC (DDA) package with exposed PowerPAD™ thermal pad (4.9 mm × 6 mm), optimized for automotive board space and thermal performance (RθJA = 43.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply | Connects 0.1 µF ceramic capacitor to SW; supplies gate drive voltage for high-side MOSFET during ON state. |
| VIN | Main power input | Accepts 4–40 V; requires low-ESR input capacitor placed close to minimize high-frequency loop inductance. |
| EN | Enable control | Precision analog input with 1.2 V threshold and internal pull-up; supports system-level UVLO via resistor divider. |
| RT/SYNC | Frequency control | Dual-function pin: sets fSW via RT resistor or accepts external clock (250 kHz–2.3 MHz) with automatic mode switching. |
| FB | Voltage feedback | Compares output voltage (via resistive divider) to 0.75 V reference; determines regulation accuracy and transient response. |
| SS | Soft-start timing | Internal 3 µA current source charges external CSS capacitor to control output ramp time and limit inrush current. |
| GND | Power ground | System return path; must be connected to thermal pad for optimal heat dissipation and noise immunity. |
| SW | Power switch node | Drives external inductor; high dv/dt node requiring tight layout and Kelvin connection to minimize EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 90 mΩ high-side MOSFET | Eliminates need for external switch and driver, reducing BOM count and layout complexity in space-constrained automotive modules. |
| Internal loop compensation | Removes requirement for external compensation network, accelerating design cycle and improving stability across capacitor ESR/ESL variations. |
| Sleep-mode with 40 µA IQ | Maintains regulation at light loads without burst-mode noise, critical for low-power CAN/LIN standby receivers and real-time clocks. |
| Spread-spectrum modulation option | Reduces peak EMI by ±6% frequency dithering-helps meet CISPR 25 Class 5 radiated emissions limits without added shielding. |
| 97% max duty cycle with BOOT refresh | Enables operation down to 4.3 VIN for 3.3 VOUT (e.g., post-cold-crank battery recovery), extending functional uptime in automotive start-stop systems. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2 kV / CDM ±750 V ESD, and thermal reliability per automotive safety requirements. |
Applications
| Automotive Infotainment Power | ADAS Domain Controller Supply |
|---|---|
Use Scenario: Powers 5 V and 3.3 V rails for display processors, audio codecs, and USB interfaces in head-unit systems with variable battery voltage (6–16 V). IC Role / Device Role / Timing Role: Primary buck regulator delivering stable, low-noise DC power; manages cold-crank (4 V) and load-dump (40 V) transients without shutdown. Use Value: 40 µA Sleep-mode IQ prevents battery drain during vehicle sleep; spread-spectrum reduces interference with AM/FM radio reception. | Use Scenario: Supplies vision processor SoC and radar interface ICs in centralized ADAS ECUs where thermal density and EMI are tightly constrained. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter operating at 2.2 MHz to shrink passive size; synchronized to system clock for deterministic noise placement. Use Value: 90 mΩ RDS(on) and internal compensation deliver >92% efficiency at 3.5 A, minimizing thermal load on stacked PCB layers. |
| Telematics Control Unit (TCU) | Industrial Vehicle Telematics Gateway |
Use Scenario: Provides always-on 3.3 V rail for cellular modem, GNSS receiver, and CAN transceivers in fleet management devices powered by 12/24 V truck batteries. IC Role / Device Role / Timing Role: System power manager with precision enable and adjustable UVLO; initiates controlled startup only above 10.5 V to prevent brownout resets. Use Value: 1 µA shutdown current extends backup battery life; thermal shutdown + OVP protect against field failures in unventilated enclosures. | Use Scenario: Regulates 5 V for dual-CAN, Ethernet PHY, and microcontroller in off-highway equipment gateways exposed to wide ambient temperatures (–40°C to +85°C). IC Role / Device Role / Timing Role: Automotive-qualified buck converter supporting extended temperature range and vibration-resistant HSOIC packaging. Use Value: AEC-Q100 Grade 1 qualification ensures long-term reliability in harsh environments; 40 V absolute max rating withstands ISO 7637-2 pulse 5a load dump. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14020SQDDARQ1 | 2 A output current, identical pinout and package; shares same control architecture and feature set. | Lower current capacity suits lower-power modules (e.g., LIN gateways, sensor nodes) where 3.5 A headroom is unnecessary. | Select when system load is ≤2 A and footprint compatibility with LMR14030SQDDARQ1 is required for design reuse. |
| LMR14050SQDDARQ1 | 5 A output current, same DDA package; higher RDS(on) (65 mΩ) and slightly higher IQ (45 µA). | Supports higher-power ADAS cameras or multi-core MCUs where 3.5 A is insufficient. | Choose for future-proofing or higher-current derivatives without PCB redesign-pin-to-pin compatible upgrade path. |
Compared with LMR14020SQDDARQ1 and LMR14050SQDDARQ1, the LMR14030SQDDARQ1 offers optimal balance of current capability, thermal performance, and quiescent power for mid-tier automotive ECUs-neither over-spec'd nor under-designed for 3–4 A typical loads.
Availability
LMR14030SQDDARQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics control units requiring stable component supply with AEC-Q100 compliance and long-lifecycle support.
Supply support for LMR14030SQDDARQ1 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 for automotive, industrial, and communications markets.
The LMR14030SQDDARQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family, engineered specifically for reliable, low-EMI DC-DC regulation in safety-critical vehicle subsystems operating across extreme temperature and voltage conditions.
FAQ
What is the maximum input voltage rating for the LMR14030SQDDARQ1?
The LMR14030SQDDARQ1 has an absolute maximum input voltage rating of 44 V, with recommended operating range from 4 V to 40 V. This allows it to safely handle automotive load-dump transients per ISO 7637-2 Pulse 5a (up to 40 V for 400 ms) without latch-up or damage, making it suitable for direct battery connection in 12 V and 24 V vehicle architectures.
Does the LMR14030SQDDARQ1 require external compensation components?
No, the LMR14030SQDDARQ1 features fully internal loop compensation. This eliminates the need for external Type II or Type III compensation networks, simplifying design, reducing bill-of-materials cost, and improving robustness across variations in output capacitor ESR and ESL-especially beneficial for automotive applications where component tolerances and temperature drift are critical.
How does the Sleep-mode function in the LMR14030SQDDARQ1 improve efficiency at light loads?
The LMR14030SQDDARQ1 enters Sleep-mode when output load drops below ~300 mA, disabling switching and clamping the COMP voltage at 400 mV. This reduces input current to 40 µA typical while maintaining regulation via periodic wake-up pulses. Unlike burst-mode converters, it avoids audible noise and output voltage ripple, making it ideal for always-on automotive subsystems like CAN wake-up receivers and real-time clocks.
Can the LMR14030SQDDARQ1 synchronize to an external clock, and what is the supported frequency range?
Yes, the LMR14030SQDDARQ1 supports external clock synchronization via the RT/SYNC pin across 250 kHz to 2.3 MHz. When an external square wave exceeds the PLL threshold (VHIGH > 1.7 V, VLOW < 0.5 V, pulse width > 30 ns), the internal oscillator locks to the falling edge. If sync is lost, it automatically reverts to RT-resistor programming-enabling deterministic EMI management in multi-converter systems.
What package type and thermal characteristics does the LMR14030SQDDARQ1 use?
The LMR14030SQDDARQ1 is packaged in an 8-pin HSOIC (DDA) with PowerPAD™ exposed thermal pad (4.9 mm × 6 mm). Its junction-to-ambient thermal resistance is 43.2°C/W, and junction-to-board is 16.4°C/W. The thermal pad must be soldered to a dedicated PCB ground plane for optimal heat dissipation-critical for sustaining 3.5 A continuous output in sealed automotive enclosures.
LMR14030SQDDARQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- 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:
- 8-SO PowerPad
LMR14030SQDDARQ1 FAQ
1.How can I place an order for LMR14030SQDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14030SQDDARQ1 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 LMR14030SQDDARQ1 reliable?
The price and inventory of LMR14030SQDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14030SQDDARQ1 is usually 5 days.
3.What payment methods are accepted for LMR14030SQDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14030SQDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14030SQDDARQ1?
LMR14030SQDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14030SQDDARQ1 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 LMR14030SQDDARQ1?
For technical support, including LMR14030SQDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14030SQDDARQ1 requirements.
6.How does Aetrix verify that LMR14030SQDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14030SQDDARQ1 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 LMR14030SQDDARQ1 meets industry standards.
7.What is the process for return or replacement of LMR14030SQDDARQ1?
All LMR14030SQDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14030SQDDARQ1, 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 LMR14030SQDDARQ1 part is unused and in its original packaging.
Return procedure for LMR14030SQDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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