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Texas Instruments LMR14050QDPRTQ1
- Part No.:
- LMR14050QDPRTQ1
- Manufacturer:
- Texas Instruments
- Package:
- 10-WDFN Exposed Pad
- Datasheet:
-
LMR14050QDPRTQ1.pdf
- Description:
- IC REG BUCK ADJ 5A 10WSON
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
LMR14050QDPRTQ1 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, 5 A continuous output current, 40 µA quiescent current in sleep mode, and adjustable 200 kHz–2.5 MHz switching frequency. It delivers regulated 0.8 V–28 V output for battery-powered vehicle subsystems requiring low-noise, high-efficiency power conversion.
For engineers reviewing the LMR14050QDPRTQ1 datasheet, LMR14050QDPRTQ1 pinout, LMR14050QDPRTQ1 application, or LMR14050QDPRTQ1 equivalent, key selection considerations include its ultra-low IQ for always-on systems, spread-spectrum EMI reduction capability, precision enable input for sequencing, internal compensation for minimal external components, and thermal shutdown protection in automotive environments.
Technical Context
The LMR14050QDPRTQ1 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 40 µA IQ while dynamically adjusting frequency to sustain regulation.
It features a bootstrap gate drive architecture enabling up to 97% duty cycle for low-dropout operation, synchronized switching via RT/SYNC pin (250 kHz–2.3 MHz), and internal loop compensation eliminating external compensation networks - all within an AEC-Q100 qualified 8-pin HSOIC package with PowerPAD™ thermal pad.
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 withstands load-dump transients up to 44 V. |
| Output Current | 5 A continuous - sufficient for powering ADAS sensors, infotainment processors, or body control modules without external current boosting. |
| Quiescent Current | 40 µA in sleep mode - enables multi-week battery hold-up in parked vehicle applications without excessive drain. |
| Switching Frequency | 200 kHz to 2.5 MHz - allows trade-off between inductor size (high-freq) and conduction loss (low-freq); programmable via RT resistor or external clock sync. |
| High-Side RDS(on) | 90 mΩ typical - minimizes conduction loss and thermal rise at full 5 A load, supporting compact thermal design in constrained automotive PCB layouts. |
| Feedback Reference | 0.750 V ±1.5% over –40°C to +125°C - enables precise output voltage setting across automotive temperature extremes with minimal drift. |
| Min. On-Time | 75 ns - supports high VIN-to-VOUT ratios (e.g., 24 V → 3.3 V) at high switching frequencies without pulse-skipping instability. |
Pinout & Package
LMR14050QDPRTQ1 is housed in an 8-pin HSOIC (DDA) package with exposed thermal pad (4.9 mm × 6 mm), optimized for automotive thermal reliability and board-level manufacturability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOT | Bootstrap supply | Provides gate drive voltage for high-side MOSFET; requires 0.1 µF ceramic capacitor to SW for stable operation. |
| VIN | Main power input | Accepts 4–40 V input; must be bypassed with low-ESR capacitors placed close to pin to suppress high-frequency noise. |
| EN | Enable control | Logic-level input with 1.2 V threshold and internal pull-up; supports precision UVLO configuration using external resistor divider. |
| RT/SYNC | Frequency control | Configures switching frequency via resistor to GND (200 kHz–2.5 MHz) or accepts external clock (250 kHz–2.3 MHz) for EMI synchronization. |
| FB | Voltage feedback | Monitors output via resistive divider; internal 0.75 V reference enables accurate VOUT setting from 0.8 V to 28 V. |
| SS | Soft-start timing | Controls output ramp rate via external capacitor; prevents inrush current during power-up and resets during shutdown or thermal fault. |
| GND | Power ground | System return path; connects to thermal pad for primary heat dissipation - must be tied to large copper area on PCB. |
| SW | Power switch node | Drives external inductor; high dv/dt node requiring tight layout and minimized trace length to reduce EMI and ringing. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2 kV / CDM ±750 V ESD, ensuring robustness in under-hood automotive environments. |
| Synchronized spread-spectrum mode | Reduces peak EMI by ±6% frequency dithering - simplifies compliance with CISPR 25 Class 5 radiated emissions limits without added filtering. |
| Internal compensation network | Eliminates need for external Type II/III compensation components - cuts BOM count, saves board space, and guarantees stable loop response across all output capacitors. |
| Precision enable with UVLO hysteresis | Enables reliable system power sequencing and battery undervoltage protection using two external resistors - no additional supervisor IC required. |
| Thermal shutdown with hysteresis | Shuts down at 170°C junction temperature and restarts after 12°C cooldown - prevents thermal runaway during overload or poor heatsinking conditions. |
Applications
| Automotive Battery Regulation | Industrial Power Supplies |
|---|---|
Use Scenario: Regulating 12 V/24 V battery rail to 5 V or 3.3 V for always-on telematics modules during vehicle sleep mode. IC Role / Device Role / Timing Role: Primary buck converter delivering stable, low-noise output with 40 µA IQ to minimize parasitic battery drain over extended parking periods. Use Value: Extends vehicle battery life beyond 30 days in parked state while maintaining CAN bus wake-up readiness and GPS tracking functionality. | Use Scenario: Powering PLC I/O modules in factory automation systems where wide-input industrial supplies (18–36 V) feed distributed 5 V logic rails. IC Role / Device Role / Timing Role: High-reliability step-down regulator handling input transients and operating continuously at 60°C ambient without derating. Use Value: Eliminates need for external TVS or pre-regulator stages due to 40 V absolute max rating and integrated OVP/UVLO protection. |
| Telecom/Datacom Systems | General Purpose Wide Vin Regulation |
Use Scenario: Generating intermediate 12 V rail from 48 V telecom backplane in remote radio units with strict EMI requirements. IC Role / Device Role / Timing Role: Synchronized buck converter locked to system clock to avoid beat frequencies and meet FCC Part 15 Class B conducted emissions limits. Use Value: Achieves >85% efficiency at 3 A load while reducing filter component count via spread-spectrum operation and internal compensation. | Use Scenario: Universal input power stage for test equipment accepting 9–36 V DC inputs and requiring stable 3.3 V/5 V outputs across varying line conditions. IC Role / Device Role / Timing Role: Flexible, single-chip solution supporting both fixed-frequency and sync modes - simplifies design reuse across multiple product variants. Use Value: Reduces time-to-market by removing loop compensation design effort and enabling rapid validation with TI's WEBENCH® tool. |
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 | 3.5 A output current, 10-pin WSON package, identical pinout and feature set except lower current rating and different thermal resistance (36.5°C/W vs 43.2°C/W). | Used where 3.5 A suffices and smaller 4 mm × 4 mm footprint is preferred; not suitable for sustained 5 A loads. | Select when board space is critical and peak load remains ≤3.5 A; verify thermal margin with actual airflow and copper area. |
| TPS54560QDGQRQ1 | 60 V input, 5 A, but higher 110 µA IQ, no spread spectrum, uses external compensation, and lacks PGOOD pin. | Preferred for 48 V industrial or commercial applications where input exceeds 40 V; less optimal for ultra-low-IQ automotive sleep modes. | Choose only if input voltage may exceed 40 V; otherwise LMR14050QDPRTQ1 offers superior IQ, EMI control, and ease-of-use for automotive 12 V/24 V systems. |
Compared with LMR14030QDPRRQ1, LMR14050QDPRTQ1 delivers higher current in the same family architecture but requires larger HSOIC thermal pad layout; versus TPS54560QDGQRQ1, it trades off input voltage headroom for significantly lower IQ, integrated EMI reduction, and simplified design - making it the optimal choice for AEC-Q100-compliant 5 A automotive buck regulation.
Availability
LMR14050QDPRTQ1 is available at Aetrix Electronics and suitable for automotive battery regulation, industrial power supplies, and telecom/datacom systems requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for LMR14050QDPRTQ1 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 solutions for automotive, industrial, personal electronics, and enterprise systems.
The LMR14050QDPRTQ1 belongs to TI's SIMPLE SWITCHER® automotive power converter family, engineered specifically for robust, low-EMI, high-efficiency DC-DC conversion in safety-critical vehicle subsystems operating across extreme temperature and voltage conditions.
FAQ
What is the maximum input voltage rating for the LMR14050QDPRTQ1?
The LMR14050QDPRTQ1 has an absolute maximum input voltage rating of 44 V, with recommended operating input range from 4 V to 40 V. This allows safe operation during automotive load-dump events and cold-crank conditions while maintaining regulation down to 4 V - a key requirement for AEC-Q100 Grade 1 qualification.
Does the LMR14050QDPRTQ1 require external compensation components?
No, the LMR14050QDPRTQ1 features fully internal loop compensation. This eliminates the need for external Type II or Type III compensation networks, reduces BOM count, saves PCB area, and guarantees stable operation across all supported output capacitor types - including ceramic, polymer, and electrolytic.
How does the LMR14050QDPRTQ1 achieve ultra-low quiescent current?
The LMR14050QDPRTQ1 achieves 40 µA quiescent current in sleep mode by disabling switching activity while maintaining regulation through periodic burst-mode pulses. In shutdown mode, it draws only 1 µA - extending battery life in always-on automotive modules such as telematics control units and gateway ECUs.
Can the LMR14050QDPRTQ1 synchronize to an external clock signal?
Yes, the LMR14050QDPRTQ1 supports synchronization via its RT/SYNC pin, accepting external clock signals from 250 kHz to 2.3 MHz. The device locks to the falling edge of the input clock and disables its internal oscillator - enabling EMI reduction through frequency alignment with other system clocks in complex automotive or telecom designs.
What thermal performance can be expected from the LMR14050QDPRTQ1 in its HSOIC package?
In the 8-pin HSOIC (DDA) package, the LMR14050QDPRTQ1 has a junction-to-ambient thermal resistance (RθJA) of 43.2°C/W with standard 2 oz copper and 2-in² thermal pad. With proper PCB layout - including thermal vias under the exposed PowerPAD™ - it sustains 5 A continuous output at +85°C ambient without derating.
LMR14050QDPRTQ1 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:
- 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:
- 10-WSON (4x4)
LMR14050QDPRTQ1 FAQ
1.How can I place an order for LMR14050QDPRTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14050QDPRTQ1 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 LMR14050QDPRTQ1 reliable?
The price and inventory of LMR14050QDPRTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14050QDPRTQ1 is usually 5 days.
3.What payment methods are accepted for LMR14050QDPRTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14050QDPRTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14050QDPRTQ1?
LMR14050QDPRTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14050QDPRTQ1 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 LMR14050QDPRTQ1?
For technical support, including LMR14050QDPRTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14050QDPRTQ1 requirements.
6.How does Aetrix verify that LMR14050QDPRTQ1 is sourced from the original manufacturer or authorized distributors?
All LMR14050QDPRTQ1 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 LMR14050QDPRTQ1 meets industry standards.
7.What is the process for return or replacement of LMR14050QDPRTQ1?
All LMR14050QDPRTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LMR14050QDPRTQ1, 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 LMR14050QDPRTQ1 part is unused and in its original packaging.
Return procedure for LMR14050QDPRTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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