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Texas Instruments LMR14020QDPRRQ1
- Part No.:
- LMR14020QDPRRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LMR14020QDPRRQ1.pdf
- Description:
- IC REG BUCK ADJ 2A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,939
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Product details
Overview
LMR14020QDPRRQ1 from Texas Instruments is an automotive-grade 40V, 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 automotive systems such as infotainment head units and ADAS domain controllers.
For engineers reviewing the LMR14020QDPRRQ1 datasheet, LMR14020QDPRRQ1 pinout, LMR14020QDPRRQ1 application, or LMR14020QDPRRQ1 equivalent, key selection considerations include AEC-Q100 Grade 1 qualification (–40°C to 125°C), spread spectrum EMI reduction, precision enable input for sequencing, internal loop compensation, and WSON-10 package thermal performance.
Technical Context
The LMR14020QDPRRQ1 implements fixed-frequency peak current-mode control with slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its sleep mode reduces switching losses at light load by clamping COMP voltage at 400mV and drawing only 40µA IQ.
It supports high-duty-cycle operation up to ~97% via bootstrap capacitor recharge circuitry and includes cycle-by-cycle current limiting, thermal shutdown at 170°C, output overvoltage protection, and UVLO with 285mV hysteresis. The RT/SYNC pin enables either resistor-programmed frequency or external clock synchronization from 250kHz to 2.3MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports direct connection to automotive battery rails including cold-crank (4.5V) and load-dump (40V) transients. |
| Output Current | 2A continuous - sufficient for powering microcontrollers, sensors, and communication ICs in automotive ECUs. |
| Quiescent Current | 40µA in sleep mode - extends battery life in always-on modules like telematics and gateway nodes. |
| Switching Frequency | 200kHz–2.5MHz adjustable - enables optimization between efficiency (low fSW) and component size (high fSW). |
| High-Side RDS(on) | 90mΩ typical - reduces conduction loss and improves thermal performance in compact WSON-10 package. |
| Feedback Reference | 0.750V ±1.2% - enables precise output regulation across temperature; supports adjustable or fixed 5V output variants. |
| Minimum On-Time | 75ns - allows high step-down ratios (e.g., 24V→3.3V) without pulse-skipping at high fSW. |
| Thermal Resistance | RθJA = 36.5°C/W (WSON-10) - enables 2A operation without forced airflow in automotive under-hood environments. |
Pinout & Package
LMR14020QDPRRQ1 is housed in a 10-pin WSON package (4mm × 4mm) with exposed thermal pad for low-junction-to-board thermal resistance (RθJB = 13.6°C/W). The package is RoHS-compliant and moisture-sensitive level 2a.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply | Connects 0.1µF ceramic capacitor to SW; supplies gate drive for high-side MOSFET during high-duty-cycle operation. |
| VIN | Main power input | Accepts 4V–40V input; requires local high-frequency bypass capacitor; path to GND must be minimized for EMI control. |
| EN | Enable control | Logic-compatible input with 1.2V threshold and internal pull-up; supports system-level UVLO via external resistor divider. |
| RT/SYNC | Frequency programming/sync | Configurable as resistor-set oscillator (200kHz–2.5MHz) or high-impedance clock input (250kHz–2.3MHz). |
| FB | Feedback sensing | Monitors output voltage via resistor divider; 0.75V reference enables accurate regulation of adjustable or fixed outputs. |
| SS | Soft-start timing | Controls output ramp rate via external capacitor; prevents inrush current into downstream capacitance. |
| PGOOD | Power-good flag | Open-drain output asserting when VOUT is within ±3% of target; requires external pull-up to logic rail ≤7V. |
| GND | System ground | Reference for all analog and power circuits; connects directly to PCB ground plane. |
| SW | Switch node | Drives external inductor; high dv/dt node requiring tight layout and minimal trace area to reduce EMI. |
| Thermal Pad | Heat dissipation | Exposed pad (Pin 11) must be soldered to large copper pour connected to GND for thermal and electrical integrity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2kV, CDM ±750V - meets automotive reliability requirements. |
| Spread spectrum modulation | Reduces peak EMI by ±6% frequency dithering - simplifies compliance with CISPR 25 Class 5 radiated emissions limits. |
| Internal loop compensation | Eliminates need for external compensation network - reduces BOM count and design iteration time for stable operation. |
| Precision enable with UVLO hysteresis | Enables robust power sequencing and battery undervoltage protection using two external resistors - avoids brownout resets. |
| Ultra-low shutdown current | 1µA max shutdown IQ - preserves battery charge in parked-vehicle applications like remote keyless entry receivers. |
| Thermal and fault protection | Includes thermal shutdown (170°C), output overvoltage lockout, cycle-by-cycle current limit, and short-circuit foldback - ensures safe failure modes. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head unit with 12V battery input subject to cold-crank and load-dump events. IC Role / Device Role: Primary buck regulator delivering 5V/2A with ultra-low quiescent current to maintain RTC and CAN wake-up capability. Use Value: 40µA sleep IQ and 1µA shutdown current extend backup battery life; 40V absolute max rating withstands 36V load-dump transients. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera with strict EMI limits near RF antennas. IC Role / Device Role: Compact, low-noise 3.3V/2A power stage placed near sensor to minimize IR drop and noise coupling. Use Value: Spread spectrum and 75ns min on-time enable clean 24V→3.3V conversion at 2.2MHz; WSON-10 footprint saves board space. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
|
Use Scenario: Provides isolated 5V rail for cellular modem, GNSS receiver, and CAN transceivers in always-connected vehicle tracking systems. IC Role / Device Role: High-efficiency intermediate bus converter operating across wide input range (6V–36V) during engine start-stop cycles. Use Value: Adjustable frequency allows 2MHz operation to shrink filter components; internal compensation ensures stability with ceramic output caps. |
Use Scenario: Generates 3.3V for MCU, Ethernet PHY, and LIN transceivers in multi-protocol vehicle gateway with thermal constraints. IC Role / Device Role: Thermally robust 2A buck regulator mounted on inner layer with thermal pad tied to ground plane. Use Value: RθJA = 36.5°C/W enables full 2A load at 85°C ambient; PGOOD signal coordinates safe boot sequence with MCU. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14030QDDARQ1 | 3.5A output, HSOIC-8 package, same 4V–40V input, but higher RDS(on) (110mΩ) and larger footprint. | Used where higher current is required and board space permits SOIC-8; lacks PGOOD pin in DDA variant. | Select when >2A load margin is needed and thermal design accommodates higher RθJA (43.2°C/W). |
| TPS54240QDGQRQ1 | 3.5A, 42V input, 45µA IQ, but requires external compensation and has no spread spectrum or PGOOD. | Suitable for cost-sensitive industrial designs where EMI filtering is handled externally and sequencing is simpler. | Choose when design flexibility outweighs integration benefits - e.g., custom loop response or legacy layout reuse. |
Compared with LMR14020QDPRRQ1, the LMR14030QDDARQ1 offers higher current in a less thermally efficient package, while the TPS54240QDGQRQ1 trades integration for configurability - making LMR14020QDPRRQ1 optimal for space-constrained, EMI-sensitive automotive modules needing plug-and-play reliability.
Availability
LMR14020QDPRRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature and long product lifecycles.
Supply support for LMR14020QDPRRQ1 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 company specializing in analog and embedded processing technologies, with leadership in automotive power management and AEC-Q100 qualified products.
The LMR14020QDPRRQ1 belongs to TI's SIMPLE SWITCHER® automotive DC/DC converter family, designed specifically for reliable, low-EMI power conversion in harsh automotive environments from battery to point-of-load.
FAQ
What is the maximum input voltage rating for the LMR14020QDPRRQ1?
The LMR14020QDPRRQ1 has an absolute maximum input voltage rating of 44V on the VIN pin, with recommended operation up to 40V. This rating enables robust handling of automotive load-dump transients per ISO 7637-2 Pulse 5a, ensuring reliable operation even during severe battery system disturbances without external clamping circuitry.
Does the LMR14020QDPRRQ1 support fixed 5V output without external feedback resistors?
Yes, the LMR14020QDPRRQ1 supports fixed 5V output in specific variants (e.g., LMR14020SSQ5DDARQ1), but the LMR14020QDPRRQ1 itself is the adjustable version requiring an external resistor divider on the FB pin. Its internal 0.75V reference allows precise 5V output using RFBB = 10kΩ and RFBT = 56.2kΩ (1% tolerance), achieving ±1% accuracy over temperature.
How does the spread spectrum feature reduce EMI in the LMR14020QDPRRQ1?
The LMR14020QDPRRQ1's spread spectrum modulates switching frequency by ±6% around the center value, distributing energy across a wider bandwidth and reducing peak radiated emissions. This feature helps meet stringent CISPR 25 Class 5 limits without adding ferrite beads or extra shielding - particularly valuable in compact automotive modules near sensitive RF receivers.
What thermal performance can be expected from the LMR14020QDPRRQ1 in a standard 4-layer PCB?
In a standard 4-layer PCB with 2oz copper, 1-in² thermal pad connected to internal ground plane, the LMR14020QDPRRQ1 achieves RθJA ≈ 36.5°C/W. At 2A load and 25°C ambient, junction temperature rises ~73°C - staying well below the 125°C max operating limit. For sustained 2A operation at 85°C ambient, derating to ~1.6A is recommended per thermal simulation.
Can the LMR14020QDPRRQ1 synchronize to an external clock, and what are the timing requirements?
Yes, the LMR14020QDPRRQ1 supports synchronization via its RT/SYNC pin, accepting external clocks from 250kHz to 2.3MHz. Required specifications include high-level ≥1.7V, low-level ≤0.5V, minimum pulse width ≥30ns, and falling-edge triggering. A series 50Ω termination and AC-coupling capacitor (e.g., 10pF) are recommended for low-impedance sources to ensure reliable PLL lock.
LMR14020QDPRRQ1 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:
- 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:
- 10-WSON (4x4)
LMR14020QDPRRQ1 FAQ
1.How can I place an order for LMR14020QDPRRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14020QDPRRQ1 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 LMR14020QDPRRQ1 reliable?
The price and inventory of LMR14020QDPRRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14020QDPRRQ1 is usually 5 days.
3.What payment methods are accepted for LMR14020QDPRRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14020QDPRRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14020QDPRRQ1?
LMR14020QDPRRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14020QDPRRQ1 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 LMR14020QDPRRQ1?
For technical support, including LMR14020QDPRRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14020QDPRRQ1 requirements.
6.How does Aetrix verify that LMR14020QDPRRQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14020QDPRRQ1 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 LMR14020QDPRRQ1 meets industry standards.
7.What is the process for return or replacement of LMR14020QDPRRQ1?
All LMR14020QDPRRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14020QDPRRQ1, 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 LMR14020QDPRRQ1 part is unused and in its original packaging.
Return procedure for LMR14020QDPRRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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