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Texas Instruments LMR14006XDDCR
- Part No.:
- LMR14006XDDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14006XDDCR.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:7,555
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Product details
Overview
LMR14006XDDCR from Texas Instruments is a 40 V input, 600 mA synchronous buck DC/DC regulator in TSOT-6L package, featuring 1.1 MHz fixed switching frequency, 0.765 V feedback reference, and ultra-low 28 µA quiescent current in sleep mode-designed for battery-powered industrial and automotive power conditioning.
For engineers reviewing the LMR14006XDDCR datasheet, LMR14006XDDCR pinout, LMR14006XDDCR application, or LMR14006XDDCR equivalent, key selection criteria include its 4–40 V input range, integrated high-side MOSFET with bootstrap gate drive, internal compensation, thermal shutdown at 170°C, and compatibility with ceramic output capacitors in space-constrained designs.
Technical Context
The LMR14006XDDCR implements constant-frequency peak current-mode control with internal slope compensation and leading-edge blanking to stabilize loop response and suppress noise-induced false triggering. Its integrated boot regulator refreshes the CB-to-SW capacitor during low-side conduction, enabling high-duty-cycle operation up to 96% while maintaining gate drive integrity.
Sleep mode activates when peak inductor current falls below ~80 mA, reducing switching and gate-drive losses to sustain 28 µA quiescent current; shutdown draws only 1 µA. Overvoltage transient protection (OVTP) clamps the high-side switch if FB exceeds 108% of 0.765 V, limiting output overshoot during load unload transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V - supports wide-input industrial and automotive rails without pre-regulation |
| Output Current | Up to 600 mA - sufficient for powering microcontrollers, sensors, and interface ICs |
| Switching Frequency | 1.1 MHz (X version) - enables compact 2.2–10 µH inductors and low-ESR ceramic output caps |
| Feedback Reference | 0.765 V ±1.5% - sets precise output voltage via external resistor divider (e.g., 5 V = R1=54.9 kΩ, R2=10 kΩ) |
| Quiescent Current | 28 µA in sleep mode - extends battery runtime in always-on portable equipment |
| Shutdown Current | 1 µA - minimizes leakage drain during system standby or storage |
| Thermal Shutdown | 170°C trip, 160°C hysteresis - protects against sustained overload or poor PCB thermal design |
Pinout & Package
LMR14006XDDCR is housed in a thermally enhanced TSOT-6L package (2.9 mm × 1.6 mm, 0.95 mm height) with exposed thermal pad for improved power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB (Pin 1) | Bootstrap bias supply | Connects external 100 nF ceramic capacitor to SW; supplies gate drive voltage for internal high-side MOSFET |
| GND (Pin 2) | Power ground | Main return path for input, output, and internal circuitry; must be low-impedance connection to thermal pad |
| FB (Pin 3) | Voltage feedback input | Monitors output via resistor divider; regulates output by comparing to 0.765 V internal reference |
| /SHDN (Pin 4) | Enable/disable control | High-voltage tolerant (≤40 V); pulled high internally; <1.2 V disables regulator and reduces IQ to 1 µA |
| VIN (Pin 5) | Main power input | Supplies internal bias and high-side MOSFET drain; accepts 4–40 V with UVLO at 4 V (rising) |
| SW (Pin 6) | Switch node | Connects to inductor, catch diode anode, and CB capacitor; carries high dv/dt switching waveform |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot recharge diode | Eliminates external diode, reducing BOM count and layout area in TSOT-6L footprint |
| Internal soft-start | Prevents inrush current during startup; eliminates need for external timing capacitor |
| Pulse-by-pulse overcurrent protection | Clamps COMP node to limit peak switch current to 1.2 A, preventing MOSFET failure under short-circuit |
| Overvoltage transient protection (OVTP) | Disables high-side switch if FB > 0.826 V (108% × 0.765 V), suppressing output overshoot with low-COUT designs |
| High-voltage enable input | /SHDN tolerates up to 40 V, allowing direct connection to unregulated 12/24 V rails without level-shifting |
Applications
| Industrial Distributed Power | Automotive Body Control |
|---|---|
Use Scenario: Powering PLC I/O modules and fieldbus interface ICs from 24 V DC rail with intermittent load demand. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3 V or 5 V to microcontroller and CAN transceiver. Use Value: 28 µA sleep current preserves backup battery life during extended idle periods; 40 V max input withstands load-dump transients. | Use Scenario: Supplying infotainment display logic and sensor fusion MCU in 12 V vehicle architecture. IC Role / Device Role / Timing Role: Point-of-load converter stepping down battery voltage to 5 V for USB peripherals and touch controller. Use Value: 1.1 MHz switching enables small 3.3 µH inductor and 10 µF ceramic output cap, meeting tight EMI and space constraints. |
| Battery-Powered Handheld Testers | Portable Medical Sensors |
Use Scenario: Power management in handheld multimeter or insulation tester operating from two Li-ion cells (6–8.4 V). IC Role / Device Role / Timing Role: Main DC/DC regulator generating 3.3 V for ADC, LCD driver, and BLE radio. Use Value: 1 µA shutdown current prevents measurable battery drain during storage; internal compensation simplifies layout validation. | Use Scenario: Long-life wearable pulse oximeter powered by coin cell or small LiPo battery. IC Role / Device Role / Timing Role: Efficient step-down converter delivering regulated 1.8 V or 3.3 V to analog front-end and low-power MCU. Use Value: Sleep mode engagement at <80 mA peak inductor current ensures ultra-low IQ across full operating temperature range (–40°C to 125°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006YDDCR | 2.1 MHz switching frequency vs. 1.1 MHz; identical pinout, package, and electrical specs otherwise | Better suited for ultra-compact designs requiring smaller inductors (<4.7 µH) and lower output capacitance | Select Y version when board area is constrained and higher-frequency EMI filtering is manageable |
| TPS54202DDCR | 2.1 MHz, 4.5–28 V input, 2 A output; requires external compensation; no integrated boot diode | Higher current capability but larger solution size and more complex loop tuning | Choose TPS54202DDCR only when >600 mA load or wider VIN range beyond 40 V is required |
Compared with LMR14006YDDCR, the LMR14006XDDCR offers lower EMI and relaxed layout sensitivity due to its 1.1 MHz frequency, while TPS54202DDCR trades integration for higher output current and flexibility-neither is pin-compatible, but both serve overlapping mid-power buck use cases.
Availability
LMR14006XDDCR is available at Aetrix Electronics and suitable for industrial distributed power systems, automotive body electronics, and battery-powered handheld instruments requiring stable component supply and long-term lifecycle support.
Supply support for LMR14006XDDCR 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, embedded processing, and power management technologies, with decades of expertise in high-reliability DC/DC conversion.
The LMR14006 series belongs to TI's SIMPLE SWITCHER® portfolio-designed specifically for ease-of-use, minimal external component count, and robust operation in harsh industrial and automotive environments.
FAQ
What is the maximum duty cycle supported by the LMR14006XDDCR?
The LMR14006XDDCR supports up to 96% maximum duty cycle, enabled by its bootstrap UVLO circuit and internal boot capacitor refresh mechanism. This allows operation down to output voltages near the 0.765 V feedback reference-even at high input-to-output ratios-provided the CB-to-SW voltage remains above 3 V. The device maintains regulation during dropout conditions by dynamically managing boot charge transfer.
Does the LMR14006XDDCR require an external bootstrap diode?
No, the LMR14006XDDCR integrates the bootstrap recharge diode internally, eliminating the need for an external component between CB and VIN. This reduces bill-of-materials count and PCB area while improving reliability. Only a single 100 nF ceramic capacitor between CB and SW is required to establish the gate drive voltage for the internal high-side MOSFET.
How does sleep mode activate and what load conditions trigger it in the LMR14006XDDCR?
Sleep mode in the LMR14006XDDCR activates automatically when peak inductor current falls below approximately 80 mA-regardless of average load current-and the output voltage remains within regulation. It is not triggered by light average load alone; rather, it responds to instantaneous current demand. This behavior makes sleep mode highly dependent on inductor value and switching frequency, and it reduces quiescent current to 28 µA without compromising regulation accuracy.
Can the LMR14006XDDCR be used with ceramic output capacitors only?
Yes, the LMR14006XDDCR is fully compatible with ceramic output capacitors and is optimized for them. Its internal compensation and current-mode control architecture ensure stability with low-ESR ceramics (e.g., 10 µF X5R/X7R). No additional ESR-based damping is required, unlike older voltage-mode controllers. Typical designs use 4.7–22 µF ceramic capacitors, enabling compact, low-noise, and high-reliability power solutions.
What protection features are built into the LMR14006XDDCR?
The LMR14006XDDCR includes pulse-by-pulse overcurrent protection (1.2 A typical limit), thermal shutdown (170°C trip, 10°C hysteresis), input undervoltage lockout (4 V rising threshold), overvoltage transient protection (clamps SW if FB exceeds 0.826 V), and shutdown current limiting (1 µA). These features operate autonomously without external components, ensuring robust fault recovery and system-level safety in unattended operation.
LMR14006XDDCR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- 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):
- 0.765V
- Voltage - Output (Max):
- 38.4V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR14006XDDCR FAQ
1.How can I place an order for LMR14006XDDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14006XDDCR 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 LMR14006XDDCR reliable?
The price and inventory of LMR14006XDDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14006XDDCR is usually 5 days.
3.What payment methods are accepted for LMR14006XDDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14006XDDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14006XDDCR?
LMR14006XDDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14006XDDCR 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 LMR14006XDDCR?
For technical support, including LMR14006XDDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14006XDDCR requirements.
6.How does Aetrix verify that LMR14006XDDCR is sourced from the original manufacturer or authorized distributors?
All LMR14006XDDCR 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 LMR14006XDDCR meets industry standards.
7.What is the process for return or replacement of LMR14006XDDCR?
All LMR14006XDDCR units undergo pre-shipment inspection (PSI). If there is an issue with LMR14006XDDCR, 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 LMR14006XDDCR part is unused and in its original packaging.
Return procedure for LMR14006XDDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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