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Texas Instruments LMR14020SSQDDAQ1
- Part No.:
- LMR14020SSQDDAQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-PowerSOIC (0.154", 3.90mm Width)
- Datasheet:
-
LMR14020SSQDDAQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOPWR
- Quantity:
- Payment:
- Shipping:
Inventory:450
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Product details
Overview
LMR14020SSQDDAQ1 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–40 V input range, 2 A continuous output current, and ultra-low 40 µA quiescent current in sleep mode-designed for battery-regulated systems in engine control units and ADAS domain controllers.
For engineers reviewing the LMR14020SSQDDAQ1 datasheet, LMR14020SSQDDAQ1 pinout, LMR14020SSQDDAQ1 application, or LMR14020SSQDDAQ1 equivalent, key selection considerations include its spread-spectrum EMI reduction capability, 75 ns minimum on-time for high VIN/VOUT ratios, internal loop compensation, precision enable threshold (1.2 V), and thermal shutdown at 170 °C.
Technical Context
The LMR14020SSQDDAQ1 implements fixed-frequency peak current-mode control with slope compensation to ensure stability above 50% duty cycle. Its Sleep Mode dynamically reduces switching frequency under light load to maintain 40 µA IQ while preserving regulation.
It supports dual operating modes: resistor-programmed switching frequency (200 kHz–2.5 MHz) via RT/SYNC pin, or external clock synchronization (250 kHz–2.3 MHz); spread-spectrum dithering (±6%) is enabled by default in this variant, reducing peak EMI emissions without requiring layout changes.
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 input rails. |
| Output Current | 2 A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in automotive ECUs. |
| Quiescent Current | 40 µA in sleep mode - enables >1-year battery standby life in always-on vehicle modules (e.g., telematics, alarm systems). |
| Switching Frequency | Programmable 200 kHz–2.5 MHz - allows trade-off between inductor size (high-freq) and efficiency (low-freq). |
| High-Side RDS(on) | 90 mΩ typical - minimizes conduction loss at 2 A, enabling >90% efficiency at 12 VIN/5 VOUT. |
| Min. On-Time | 75 ns - supports high step-down ratios (e.g., 24 V → 3.3 V) without pulse-skipping or instability. |
| Duty Cycle Max | 97% - enables operation near dropout (e.g., 4.2 VIN → 4.0 VOUT) in low-voltage battery scenarios. |
Pinout & Package
LMR14020SSQDDAQ1 is housed in an 8-pin HSOIC (DDA) package (4.9 mm × 6 mm) with exposed thermal pad for low RθJA (43.2 °C/W). The package supports high-power density layouts and requires PCB ground plane connection to the thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply | Connects 0.1 µF ceramic capacitor to SW to gate-drive high-side MOSFET; enables 97% duty cycle operation. |
| VIN | Main power input | Accepts 4–40 V; must be bypassed with low-ESR capacitor placed adjacent to pin to minimize high-frequency noise coupling. |
| EN | Enable control | Logic-level input with 1.2 V threshold and internal 1 µA pull-up; supports precise UVLO setting via external resistor divider. |
| RT/SYNC | Frequency control | Configurable as resistor-set oscillator input or high-impedance sync clock receiver (250 kHz–2.3 MHz). |
| FB | Feedback reference | Senses output voltage via resistor divider; internal 0.75 V reference enables adjustable VOUT or fixed 5 V configuration. |
| SS | Soft-start timing | External capacitor sets ramp time; internal 3 µA current source prevents inrush current during power-up. |
| GND | Power ground | System return path; connects to thermal pad for optimal heat dissipation and noise immunity. |
| SW | Switch node | Drives external inductor; high di/dt node requiring tight layout and Kelvin connection to minimize EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Spread-spectrum modulation | ±6% frequency dithering reduces peak radiated EMI by up to 10 dB, easing CISPR 25 Class 5 compliance without added filters. |
| Internal compensation | Eliminates need for external Type II/III compensation network-reduces BOM count and design iteration time. |
| Precision enable input | 1.2 V threshold with hysteresis enables robust power sequencing and system-level brown-out protection. |
| Thermal & fault protection | Includes cycle-by-cycle current limit, overvoltage lockout (109% FB), and thermal shutdown (170 °C) with 12 °C hysteresis. |
| Low shutdown current | 1 µA max shutdown current extends battery life in parked-vehicle applications such as remote keyless entry receivers. |
Applications
| Automotive Battery Regulation | ADAS Power Management |
|---|---|
Use Scenario: Regulating 12 V battery rail to 5 V/3.3 V for radar sensor modules and camera ISPs in parking assist systems. IC Role / Device Role / Timing Role: Primary buck converter supplying clean, low-noise power with spread-spectrum EMI control to meet strict automotive EMC requirements. Use Value: Enables compact, filter-free layout in space-constrained front bumper modules while maintaining CISPR 25 Class 5 compliance. |
Use Scenario: Powering vision processing SoCs and high-speed SerDes interfaces in surround-view ECUs. IC Role / Device Role / Timing Role: High-efficiency, high-PoL regulator delivering stable 1.8 V/1.1 V rails with fast transient response to dynamic CPU load steps. Use Value: Achieves >88% efficiency at 1.8 V/2 A with 40 µA quiescent current, minimizing thermal load in sealed enclosures. |
| Industrial Telematics Gateway | Commercial Vehicle Telematics |
Use Scenario: Converting 24 V truck battery to 5 V for LTE modems, GNSS receivers, and CAN FD gateways in fleet management units. IC Role / Device Role / Timing Role: Wide-input buck regulator supporting cold-crank (4 V) and load-dump (40 V) transients per ISO 7637-2. Use Value: Eliminates need for external TVS or pre-regulator stages-reducing bill-of-materials and board area by 30%. |
Use Scenario: Supplying 3.3 V to real-time OS controllers and wireless communication stacks in heavy-duty vehicle telematics boxes. IC Role / Device Role / Timing Role: Automotive-qualified DC/DC with AEC-Q100 Grade 1 rating ensuring reliable operation from –40 °C to +125 °C ambient. Use Value: Guarantees functional safety compliance (ISO 26262 ASIL-B ready) through built-in OVP, UVP, and thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14030SQDDAQ1 | 3.5 A output current, same 4–40 V input, identical pinout and footprint (DDA package) | Higher current delivery for multi-rail systems requiring 5 V/3 A or parallel 3.3 V/2 A outputs | Select when future-proofing for higher load or sharing layout with 3.5 A variants in platform designs. |
| TPS54240QDGQRQ1 | 2.5 A, 3.5–42 V input, 57 µA IQ, no spread spectrum, different pinout (10-pin MSOP) | Lacks EMI-reduction features; requires external compensation; lower thermal performance (RθJA = 64.2 °C/W) | Choose only if spread spectrum is unnecessary and layout flexibility permits non-pin-compatible redesign. |
Compared with LMR14020SSQDDAQ1, the LMR14030SQDDAQ1 offers scalable current capacity within identical mechanical constraints, while the TPS54240QDGQRQ1 trades EMI performance and thermal efficiency for marginally wider input range-making the LMR14020SSQDDAQ1 optimal for space- and emission-sensitive automotive modules.
Availability
LMR14020SSQDDAQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, ADAS power management, and industrial telematics gateways requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LMR14020SSQDDAQ1 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 qualification expertise and broad portfolio of AEC-Q100-compliant power solutions.
The LMR14020SSQDDAQ1 belongs to TI's SIMPLE SWITCHER® automotive DC/DC converter family-designed specifically for robust, low-EMI power conversion in engine compartments, infotainment systems, and safety-critical electronic control units.
FAQ
What is the maximum input voltage rating for the LMR14020SSQDDAQ1?
The LMR14020SSQDDAQ1 has an absolute maximum input voltage rating of 44 V, with recommended operating range from 4 V to 40 V. This allows it to withstand automotive load-dump transients per ISO 7637-2 (up to 40 V for 400 ms) without damage or latch-up, making it suitable for direct battery connection in 12 V and 24 V vehicle architectures.
Does the LMR14020SSQDDAQ1 require external compensation components?
No, the LMR14020SSQDDAQ1 features fully internal loop compensation. Its control architecture eliminates the need for external Type II or Type III compensation networks, reducing component count, PCB area, and design validation effort-while maintaining stability across all supported output capacitors and loads.
How does the spread-spectrum feature work in the LMR14020SSQDDAQ1?
The LMR14020SSQDDAQ1 implements hardware-based spread-spectrum dithering that modulates switching frequency by ±6% around the center value. This spreads energy across a wider bandwidth, lowering peak radiated emissions by up to 10 dB-enabling compliance with stringent automotive EMC standards like CISPR 25 Class 5 without additional filtering components.
What package type and thermal characteristics does the LMR14020SSQDDAQ1 use?
The LMR14020SSQDDAQ1 uses an 8-pin HSOIC (DDA) package with exposed thermal pad. It achieves a junction-to-ambient thermal resistance (RθJA) of 43.2 °C/W when mounted on a 2-layer PCB with 1-in² copper pour, enabling 2 A continuous operation at +85 °C ambient without forced airflow.
Can the LMR14020SSQDDAQ1 be synchronized to an external clock?
Yes, the LMR14020SSQDDAQ1 supports external clock synchronization via the RT/SYNC pin. When driven with a square wave (250 kHz–2.3 MHz, VH ≥ 1.7 V, VL ≤ 0.5 V), the internal PLL locks to the external signal-enabling deterministic switching alignment across multiple converters to suppress beat frequencies and simplify EMI filtering.
LMR14020SSQDDAQ1 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
LMR14020SSQDDAQ1 FAQ
1.How can I place an order for LMR14020SSQDDAQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14020SSQDDAQ1 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 LMR14020SSQDDAQ1 reliable?
The price and inventory of LMR14020SSQDDAQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14020SSQDDAQ1 is usually 5 days.
3.What payment methods are accepted for LMR14020SSQDDAQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14020SSQDDAQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14020SSQDDAQ1?
LMR14020SSQDDAQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14020SSQDDAQ1 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 LMR14020SSQDDAQ1?
For technical support, including LMR14020SSQDDAQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14020SSQDDAQ1 requirements.
6.How does Aetrix verify that LMR14020SSQDDAQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14020SSQDDAQ1 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 LMR14020SSQDDAQ1 meets industry standards.
7.What is the process for return or replacement of LMR14020SSQDDAQ1?
All LMR14020SSQDDAQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14020SSQDDAQ1, 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 LMR14020SSQDDAQ1 part is unused and in its original packaging.
Return procedure for LMR14020SSQDDAQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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