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Texas Instruments LMR14020SQDDARQ1
- Part No.:
- LMR14020SQDDARQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR14020SQDDARQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR14020SQDDARQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 40V input, 2A synchronous step-down DC/DC converter with integrated 90mΩ high-side MOSFET, 40µA quiescent current in sleep mode, 75ns minimum on-time, and adjustable 200kHz–2.5MHz switching frequency. It delivers regulated power in battery-supplied vehicle subsystems such as infotainment head units and ADAS camera modules.
For engineers reviewing the LMR14020SQDDARQ1 datasheet, LMR14020SQDDARQ1 pinout, LMR14020SQDDARQ1 application, or LMR14020SQDDARQ1 equivalent, key selection considerations include its 4V–40V wide input range, ultra-low IQ for always-on systems, internal compensation for minimal external components, and HSOIC-8 thermal performance (RθJA = 43.2°C/W).
Technical Context
The LMR14020SQDDARQ1 implements fixed-frequency peak current-mode control with slope compensation to ensure stability at >50% duty cycles. Its internal error amplifier compares FB voltage against a 0.75V reference and adjusts peak switch current command to regulate output voltage.
Sleep mode activates below ~300mA load, clamping COMP voltage at 400mV and halting switching to sustain 40µA IQ; recovery occurs when output droop lifts COMP above threshold. The BOOT/SW bootstrap circuit enables up to 97% effective duty cycle, supported by automatic low-side discharge for capacitor recharge during dropout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports direct connection to automotive battery (cold-crank down to 4V) and industrial 24V/36V rails without pre-regulation. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and interface ICs in automotive body control modules. |
| Quiescent Current | 40µA in sleep mode - extends battery life in always-on telematics and gateway ECUs during vehicle sleep states. |
| Switching Frequency | 200kHz–2.5MHz (adjustable via RT resistor or external SYNC clock) - enables trade-off between efficiency (low fSW) and compact size (high fSW with small inductors). |
| High-Side RDS(on) | 90mΩ typical - reduces conduction loss and thermal stress in 12V/24V-to-5V/3.3V conversion at full load. |
| Minimum On-Time | 75ns - supports high VIN/VOUT ratios (e.g., 36V→3.3V at 2.2MHz) without pulse-skipping or instability. |
| Feedback Reference | 0.750V ±1.2% over –40°C to +125°C - ensures accurate output regulation across automotive ambient temperature extremes. |
| Thermal Resistance | RθJA = 43.2°C/W (HSOIC-8 package) - enables 2A operation at +85°C ambient with standard 2-layer PCB and thermal pad soldered to ground plane. |
Pinout & Package
LMR14020SQDDARQ1 is packaged in an 8-pin HSOIC (DDA) with exposed thermal pad (4.9mm × 6mm), optimized for automotive board space and thermal dissipation. Pin functions are validated per TI SNVSAG4B Rev. December 2024.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply for high-side gate driver | Connect 0.1µF X7R ceramic capacitor to SW; enables high-side MOSFET turn-on during each switching cycle. |
| VIN | Main power input | Accepts 4V–40V; requires local 10µF+ ceramic bypass capacitor placed adjacent to pin to suppress high-frequency noise. |
| EN | Enable control with precision UVLO | Pull below 1.2V to disable; internal 1µA pull-up allows floating-enable; external resistor divider sets system-level undervoltage lockout. |
| RT/SYNC | Frequency programming or external clock sync | Connect resistor to GND for 200kHz–2.5MHz setting; apply 250kHz–2.3MHz square wave for synchronization to system clock. |
| FB | Output voltage feedback sense | Connect resistor divider from VOUT to set output; internal 0.75V reference enables precise 3.3V/5V/12V regulation. |
| SS | Soft-start timing control | Capacitor from SS to GND sets ramp time; internal 3µA current source provides controlled VOUT rise to prevent inrush. |
| GND | Power and signal ground reference | Low-impedance return path; must be connected to PCB ground plane under thermal pad for thermal and EMI performance. |
| SW | Switch node output | Drives external power inductor; high di/dt node requiring tight layout and Kelvin connection to minimize ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Internal loop compensation | Eliminates need for external compensation network - reduces BOM count and design iteration time for stable 2A buck operation. |
| Spread spectrum option | Reduces peak EMI amplitude by ±6% frequency dithering - aids compliance with CISPR 25 Class 5 radiated emissions limits in automotive cabins. |
| Precision enable with UVLO hysteresis | 1.2V threshold with programmable hysteresis via external resistors - enables robust power sequencing and battery undervoltage protection in multi-rail systems. |
| Thermal, OVP, and cycle-by-cycle current limit | 170°C shutdown with 12°C hysteresis, output overvoltage protection at 107% of FB, and current limiting at 2.13–4.6A - ensures fault containment without external protection ICs. |
| 97% max duty cycle support | Enables operation down to 4.12V input for 5V output (VIN–VOUT < 1V) - critical for cold-crank survival in 12V automotive systems. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head unit with battery input subject to load dump and cold-crank transients. IC Role / Device Role / Timing Role: Primary 5V/3.3V step-down regulator delivering clean, regulated power with fast transient response to dynamic SoC loads. Use Value: 40µA sleep current prevents battery drain during vehicle off-state; 40V absolute max rating withstands ISO 7637-2 pulse 5a load dump. |
Use Scenario: Supplies image sensor, ISP, and SerDes in rear-view or surround-view camera with strict EMI and thermal constraints. IC Role / Device Role / Timing Role: Compact, low-noise 3.3V buck converter operating at 2.2MHz to avoid AM band interference and fit within tight camera housing. Use Value: Spread spectrum and internal compensation reduce conducted/radiated noise; 75ns min on-time supports 12V→3.3V conversion at high frequency. |
| Industrial PLC I/O Module | Telematics Control Unit (TCU) |
|
Use Scenario: Regulates 24V field bus to 5V logic rail in DIN-rail mounted programmable logic controller with wide ambient temperature range. IC Role / Device Role / Timing Role: Robust buck converter handling 4V–40V input variation and providing isolated 5V for microcontroller and communication peripherals. Use Value: AEC-Q100 Grade 1 qualification ensures reliability at 125°C junction temperature; internal current limit protects against shorted I/O channels. |
Use Scenario: Powers cellular modem, GNSS receiver, and CAN controller in vehicle telematics unit requiring always-on connectivity and GPS accuracy. IC Role / Device Role / Timing Role: High-efficiency 3.3V/1.8V dual-stage regulator (with downstream LDO) supporting low-power LTE/NB-IoT sleep modes. Use Value: 1µA shutdown current preserves battery during extended parking; precision enable allows controlled wake-up via CAN or GNSS interrupt. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14030SQDDARQ1 | 3.5A output current, same 4V–40V input, pin-to-pin compatible HSOIC-8 package, identical features and pinout | Required where higher load current (e.g., multi-core MCU + Ethernet PHY) exceeds 2A capability of LMR14020SQDDARQ1 | Select when future-proofing for higher power or sharing layout with 3.5A variant; no PCB change needed. |
| TPS54240DGQR | 3.5V–40V input, 2A, 57µA IQ, no spread spectrum, external compensation required, MSOP-10 package | Used in cost-sensitive industrial designs where EMI requirements are less stringent and layout flexibility allows MSOP-10 | Choose when lower BOM cost outweighs need for internal compensation and automotive qualification; not AEC-Q100 rated. |
Compared with LMR14030SQDDARQ1, the LMR14020SQDDARQ1 offers optimal size/power balance for sub-2A loads while sharing footprint and feature set; versus TPS54240DGQR, it delivers superior automotive readiness, lower IQ, and simplified design at the cost of slightly higher unit price.
Availability
LMR14020SQDDARQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial PLC I/O modules requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMR14020SQDDARQ1 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 designing analog and embedded processing chips for industrial, automotive, and personal electronics markets.
The LMR14020SQDDARQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family, engineered specifically for reliable, low-EMI DC/DC regulation in harsh vehicular environments with wide input transients and extreme temperature ranges.
FAQ
What is the maximum input voltage rating for the LMR14020SQDDARQ1?
The LMR14020SQDDARQ1 has an absolute maximum input voltage rating of 44V on the VIN pin, with recommended operation up to 40V. This 40V rating enables direct connection to 24V and 36V industrial rails and withstands automotive load dump transients per ISO 7637-2, making the LMR14020SQDDARQ1 suitable for demanding vehicle power systems without external clamping.
Does the LMR14020SQDDARQ1 require external compensation components?
No, the LMR14020SQDDARQ1 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 ensures stable 2A operation across all output voltages and capacitor types - a key advantage over competitors like the TPS54240DGQR that require manual compensation.
How does the LMR14020SQDDARQ1 achieve ultra-low quiescent current?
The LMR14020SQDDARQ1 achieves 40µA quiescent current through adaptive sleep mode: when load drops below ~300mA, it halts switching, clamps the internal COMP voltage at 400mV, and powers only essential bias circuits. In shutdown (EN < 1.2V), IQ drops further to 1µA - directly extending battery runtime in always-on automotive modules powered by LMR14020SQDDARQ1.
Can the LMR14020SQDDARQ1 synchronize to an external clock?
Yes, the LMR14020SQDDARQ1 supports frequency synchronization via its RT/SYNC pin. When driven with a 250kHz–2.3MHz square wave meeting VIH ≥ 1.7V and VIL ≤ 0.5V, the internal PLL locks to the external clock edge, enabling deterministic switching alignment across multiple converters to reduce beat frequencies and EMI peaks - a critical capability in complex automotive ECUs.
What package type and thermal performance does the LMR14020SQDDARQ1 use?
The LMR14020SQDDARQ1 uses an 8-pin HSOIC (DDA) package with exposed thermal pad (4.9mm × 6mm). Its junction-to-ambient thermal resistance is 43.2°C/W, enabling 2A continuous output at +85°C ambient on a standard 2-layer PCB with the thermal pad soldered to a solid ground plane - verified per TI's SNVSAG4B thermal characterization data.
LMR14020SQDDARQ1 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:
- 2A
- 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
LMR14020SQDDARQ1 FAQ
1.How can I place an order for LMR14020SQDDARQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14020SQDDARQ1 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 LMR14020SQDDARQ1 reliable?
The price and inventory of LMR14020SQDDARQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14020SQDDARQ1 is usually 5 days.
3.What payment methods are accepted for LMR14020SQDDARQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14020SQDDARQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14020SQDDARQ1?
LMR14020SQDDARQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14020SQDDARQ1 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 LMR14020SQDDARQ1?
For technical support, including LMR14020SQDDARQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14020SQDDARQ1 requirements.
6.How does Aetrix verify that LMR14020SQDDARQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14020SQDDARQ1 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 LMR14020SQDDARQ1 meets industry standards.
7.What is the process for return or replacement of LMR14020SQDDARQ1?
All LMR14020SQDDARQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14020SQDDARQ1, 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 LMR14020SQDDARQ1 part is unused and in its original packaging.
Return procedure for LMR14020SQDDARQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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