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Texas Instruments LMR14020SQDDAQ1
- Part No.:
- LMR14020SQDDAQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR14020SQDDAQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:724
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Product details
Overview
LMR14020SQDDAQ1 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, and adjustable 200kHz–2.5MHz switching frequency. It delivers regulated power in battery-fed automotive subsystems such as infotainment head units and ADAS camera modules.
For engineers reviewing the LMR14020SQDDAQ1 datasheet, LMR14020SQDDAQ1 pinout, LMR14020SQDDAQ1 application, or LMR14020SQDDAQ1 equivalent, key selection considerations include its 4V–40V wide VIN range, ultra-low IQ for always-on systems, spread-spectrum EMI reduction capability, precision enable threshold (1.2V typ), and internal compensation eliminating external loop components.
Technical Context
The LMR14020SQDDAQ1 implements fixed-frequency peak current mode control with slope compensation to ensure stability at >50% duty cycles. Its sleep-mode operation reduces switching losses at light loads, maintaining 40µA IQ while regulating output voltage via internal error amplifier clamping at 400mV COMP voltage.
It integrates a bootstrap gate driver with 75ns minimum on-time and supports high-duty-cycle operation up to ~97% via BOOT capacitor recharge circuitry. Frequency programming uses RT resistor (200kHz–2.5MHz), and synchronization accepts external clocks from 250kHz–2.3MHz with PLL lock-in time of 100µs.
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 ECUs. |
| Quiescent Current | 40µA in sleep mode - enables multi-week battery hold-up in always-on telematics or gateway modules. |
| High-Side RDS(on) | 90mΩ typical - minimizes conduction loss and thermal rise at full load, supporting compact thermal design. |
| Switching Frequency | 200kHz–2.5MHz adjustable - allows trade-off between efficiency (low fSW) and component size (high fSW). |
| Feedback Reference | 0.750V ±1.2% over –40°C to +125°C - ensures accurate output regulation across automotive temperature range. |
| Protection Features | Thermal shutdown (170°C), cycle-by-cycle current limit, output overvoltage protection, and UVLO with 285mV hysteresis - provides robust fault tolerance in harsh environments. |
Pinout & Package
LMR14020SQDDAQ1 is housed in an 8-pin HSOIC (DDA) package with exposed thermal pad (4.9mm × 6mm), optimized for automotive PCB layouts requiring low thermal resistance (RθJA = 43.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply | Connects 0.1µF ceramic capacitor to SW to generate gate drive voltage for integrated high-side MOSFET. |
| VIN | Main power input | Accepts 4V–40V unregulated input; requires local high-frequency bypass capacitor with minimal trace inductance. |
| EN | Enable control | Precision analog input with 1.2V threshold and internal pull-up; supports system-level UVLO via external resistor divider. |
| RT/SYNC | Frequency control | Configurable as resistor-set oscillator input (200kHz–2.5MHz) or high-impedance clock sync input (250kHz–2.3MHz). |
| FB | Output voltage feedback | Senses output via resistor divider; internal 0.75V reference enables adjustable VOUT or direct connection for fixed 5V option. |
| SS | Soft-start timing | Accepts external capacitor to program controlled output ramp-up; prevents inrush current during power-on. |
| GND | Power ground | System return path; must be connected to PCB ground plane with low-inductance layout. |
| SW | Power switch node | Drives external inductor; connects internally to high-side MOSFET drain and BOOT capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C ambient), HBM ESD H1C, CDM ESD C4A - certified for under-hood and cabin applications. |
| Internal compensation | Eliminates need for external Type II/III compensation network - reduces BOM count and design iteration time. |
| Spread spectrum modulation | ±6% frequency dithering - lowers peak EMI by spreading energy across bandwidth, easing CISPR 25 Class 5 compliance. |
| Shutdown current | 1µA max - extends battery life in parked vehicle scenarios where LMR14020SQDDAQ1 remains powered but disabled. |
| Minimum on-time | 75ns - enables high step-down ratios (e.g., 36V→3.3V at 2.2MHz) without pulse-skipping artifacts. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powering SoC, display drivers, and audio codecs in head unit with cold-crank resilience and low standby drain. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 5V/3.3V from 12V battery rail with sleep-mode IQ management. Use Value: 40µA quiescent current enables >30-day battery hold-up; 40V rating survives load-dump transients per ISO 7637-2. |
Use Scenario: Providing clean, low-noise 3.3V for image sensor and ISP in rear-view or surround-view cameras. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with spread-spectrum EMI reduction to avoid RF interference with camera data lines. Use Value: Internal compensation and 75ns min on-time support compact 2-layer PCB layout; thermal pad ensures <125°C junction temp at full load. |
| Industrial Telematics Gateway | Railway Onboard Control Unit |
|
Use Scenario: Regulating 5V for cellular modem, GNSS receiver, and CAN transceivers in fleet management hardware. IC Role / Device Role / Timing Role: Wide-VIN buck converter with precision enable sequencing and PGOOD flag for system health monitoring. Use Value: Adjustable UVLO via EN divider ensures reliable startup during brown-out; 1µA shutdown current meets EN 50121-3-2 standby requirements. |
Use Scenario: Powering microcontroller and I/O peripherals in train door control or signaling modules operating from 72V/110V DC traction supply. IC Role / Device Role / Timing Role: Pre-regulator stepping down high-voltage rail to intermediate 12V/5V for downstream converters. Use Value: 40V absolute max rating allows use with external pre-buck stage; 90mΩ RDS(on) sustains >90% efficiency at 2A across wide temperature range. |
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 | 3.5A output current, WSON-10 package, same pinout and feature set except higher current capability. | Required when load exceeds 2A or higher thermal margin needed in confined spaces. | Select if future-proofing for higher current or leveraging shared layout with LMR14020SQDDAQ1 in scalable designs. |
| TPS54240QDGQRQ1 | Non-synchronous buck, 42V input, 2A, 110µA IQ, no spread spectrum, different pinout and compensation scheme. | Lacks integrated low-side FET and spread-spectrum EMI reduction; less suitable for noise-sensitive automotive domains. | Consider only if cost sensitivity outweighs EMI performance and layout simplicity requirements. |
Compared with LMR14020SQDDAQ1, the LMR14030QDPRRQ1 offers higher current headroom in a pin-compatible WSON package, while the TPS54240QDGQRQ1 trades integration and EMI features for lower BOM cost - making LMR14020SQDDAQ1 optimal for space-constrained, EMI-critical automotive applications demanding 2A.
Availability
LMR14020SQDDAQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial telematics gateways requiring stable component supply with AEC-Q100 compliance and long-term production support.
Supply support for LMR14020SQDDAQ1 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-grade power management ICs.
The LMR14020SQDDAQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family, designed specifically for robust, easy-to-use DC/DC regulation in safety-critical vehicle subsystems operating across extended temperature and voltage ranges.
FAQ
What is the maximum input voltage rating for the LMR14020SQDDAQ1?
The LMR14020SQDDAQ1 has an absolute maximum input voltage rating of 44V on the VIN pin, with recommended operating range from 4V to 40V. This 40V upper limit ensures compatibility with automotive battery systems including load-dump transients per ISO 7637-2, while the 44V absolute rating provides margin against short-duration overvoltage events. Operation beyond 40V is not supported in normal use.
Does the LMR14020SQDDAQ1 support fixed 5V output without external resistors?
Yes, the LMR14020SQDDAQ1 supports fixed 5V output configuration: connect the FB pin directly to the output (VOUT), bypassing the external resistor divider. In this mode, the device achieves ±2% output accuracy over temperature (4.90V to 5.10V at –40°C to +125°C), verified per TI's characterization data. The LMR14020SSQ5DDARQ1 variant is factory-configured for this fixed 5V option.
How does the spread-spectrum feature reduce EMI in the LMR14020SQDDAQ1?
The LMR14020SQDDAQ1 implements spread-spectrum modulation by dithering the switching frequency ±6% around the center value set by the RT resistor or SYNC clock. This spreads radiated and conducted EMI energy across a wider bandwidth, reducing peak amplitudes by up to 10dB compared to fixed-frequency operation - simplifying compliance with CISPR 25 Class 5 automotive EMI limits without additional filtering components.
What thermal performance can be expected from the LMR14020SQDDAQ1 in HSOIC package?
In its 8-pin HSOIC (DDA) package, the LMR14020SQDDAQ1 exhibits a junction-to-ambient thermal resistance (RθJA) of 43.2°C/W with standard 2-layer PCB layout and 2-in² copper pour. With proper thermal pad soldering to inner ground plane, it sustains 2A continuous output at +85°C ambient without derating. Thermal shutdown activates at 170°C junction temperature with 12°C hysteresis to prevent cycling.
Can the LMR14020SQDDAQ1 be synchronized to an external clock, and what are the timing requirements?
Yes, the LMR14020SQDDAQ1 supports external clock synchronization via the RT/SYNC pin across 250kHz–2.3MHz. The clock must meet: high-level ≥1.7V, low-level ≤0.5V, minimum pulse width ≥30ns, and falling-edge triggering. PLL lock-in occurs within 100µs. When clock stops, the device automatically reverts to RT-resistor mode - ensuring seamless fallback without system interruption.
LMR14020SQDDAQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
LMR14020SQDDAQ1 FAQ
1.How can I place an order for LMR14020SQDDAQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14020SQDDAQ1 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 LMR14020SQDDAQ1 reliable?
The price and inventory of LMR14020SQDDAQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14020SQDDAQ1 is usually 5 days.
3.What payment methods are accepted for LMR14020SQDDAQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14020SQDDAQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14020SQDDAQ1?
LMR14020SQDDAQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14020SQDDAQ1 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 LMR14020SQDDAQ1?
For technical support, including LMR14020SQDDAQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14020SQDDAQ1 requirements.
6.How does Aetrix verify that LMR14020SQDDAQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14020SQDDAQ1 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 LMR14020SQDDAQ1 meets industry standards.
7.What is the process for return or replacement of LMR14020SQDDAQ1?
All LMR14020SQDDAQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14020SQDDAQ1, 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 LMR14020SQDDAQ1 part is unused and in its original packaging.
Return procedure for LMR14020SQDDAQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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