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Texas Instruments LMR14006YDDCT
- Part No.:
- LMR14006YDDCT
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14006YDDCT.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,247
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Product details
Overview
LMR14006YDDCT from Texas Instruments is a fixed-frequency, current-mode PWM buck regulator IC designed for step-down DC/DC conversion in space-constrained industrial and battery-powered systems. It operates from 4 V to 40 V input, delivers up to 600 mA output, features 2.1 MHz switching frequency, 0.765 V feedback reference, and achieves 28 µA quiescent current in sleep mode - enabling multi-year operation in low-power sensor nodes.
For engineers reviewing the LMR14006YDDCT datasheet, LMR14006YDDCT pinout, LMR14006YDDCT application, or LMR14006YDDCT equivalent, key selection criteria include its TSOT-6L package footprint, integrated high-side MOSFET with bootstrap gate drive, internal soft-start and compensation, and verified thermal shutdown (170°C) and overcurrent protection - all critical for reliable embedded power rail design.
Technical Context
The LMR14006YDDCT implements constant-frequency peak current-mode control with internal error amplifier, slope compensation, and leading-edge blanking to stabilize loop response and suppress subharmonic oscillation. Its functional block integrates a 600 mΩ high-side MOSFET, boot regulator, 0.765 V precision bandgap reference, and UVLO circuitry on the CB–SW node to sustain high duty cycles.
It supports high-voltage enable (/SHDN) with 1.25 V threshold and 1 µA shutdown current, and uses external resistor divider on FB to set output voltage per VOUT = 0.765 V × (1 + R1/R2). Sleep mode activates automatically when peak inductor current falls below ~80 mA, reducing quiescent draw to 28 µA without external control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V - supports wide-input industrial rails and automotive battery transients without pre-regulation. |
| Output Current | Up to 600 mA - sufficient for powering microcontrollers, sensors, and RF modules from single-stage conversion. |
| Switching Frequency | 2.1 MHz (Y version) - enables use of ≤10 µH inductors and compact ceramic output capacitors (e.g., 10 µF). |
| Feedback Reference | 0.765 V ±1.5% - sets precise output voltage via external resistor divider; enables 3.3 V, 5 V, or 12 V outputs. |
| Quiescent Current | 28 µA in sleep mode - extends battery life in always-on IoT endpoints; drops to 1 µA in shutdown. |
| Thermal Shutdown | 170°C trip with 10°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Current Limit | 1200 mA typical - provides cycle-by-cycle overcurrent protection while allowing brief inrush during startup. |
Pinout & Package
LMR14006YDDCT is housed in a thermally enhanced TSOT-6L package (2.9 mm × 1.6 mm, 0.6 mm height), optimized for high-power-density layouts with minimal board area and thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap capacitor connection | Supplies gate drive voltage for internal high-side MOSFET; requires 100 nF ceramic cap between CB and SW. |
| GND | Power ground reference | Primary return path for input, output, and internal bias currents; must be low-impedance and tied to power plane. |
| FB | Feedback input | Senses output voltage via resistor divider; regulates output by comparing to 0.765 V internal reference. |
| /SHDN | Enable/disable control | Active-low logic input; float or pull ≥1.25 V to enable; pull ≤1.05 V to enter 1 µA shutdown state. |
| VIN | Main power input | Supplies internal LDO and high-side MOSFET drain; accepts 4–40 V with 45 V absolute max rating. |
| SW | 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 Schottky diode in bootstrap path - reduces BOM count and layout complexity. |
| Internal soft-start | Prevents inrush current at startup by ramping COMP voltage - avoids output overshoot and input sag. |
| Overvoltage transient protection (OVTP) | Clamps high-side switch when FB exceeds 108% of 0.765 V - limits output overshoot during load dump or unload. |
| High-duty-cycle support | Operates up to 97% duty cycle via CB–SW UVLO refresh - enables low-VOUT/high-VIN applications like 12 V → 3.3 V. |
| Thermal foldback | Reduces output current above 125°C junction before full shutdown - maintains partial regulation during thermal stress. |
Applications
| Industrial Sensor Node Power | Automotive Body Control Module |
|---|---|
|
Use Scenario: Powering ultra-low-power MCU, temperature/humidity sensor, and BLE radio from 12 V vehicle battery or 24 V industrial bus. IC Role / Device Role / Timing Role: Primary buck regulator generating stable 3.3 V rail; manages sleep/wake transitions with 28 µA quiescent draw. Use Value: Enables >5-year battery life in wireless sensor deployments; eliminates need for external enable sequencing or low-IQ LDO post-regulator. |
Use Scenario: Supplying 5 V to microcontroller, CAN transceiver, and LED drivers in door module or seat controller. IC Role / Device Role / Timing Role: Main 5 V power source with 40 V input tolerance and thermal shutdown - withstands load-dump transients and ambient temperatures up to 105°C. Use Value: Replaces discrete buck+LDO solutions; 2.1 MHz switching avoids AM-band interference; TSOT-6L fits tight connector zones. |
| Portable Medical Instrument | Smart Home Hub Power |
|
Use Scenario: Generating 5 V from dual AA/AAA battery pack (2.4–3.6 V) boosted to 12 V, then stepped down for display and processing. IC Role / Device Role / Timing Role: Secondary buck stage after boost converter; handles variable load from OLED screen backlight and ARM Cortex-M core. Use Value: Sleep mode cuts standby power to <30 µA - critical for FDA-required battery runtime; internal compensation simplifies compliance testing. |
Use Scenario: Providing clean 3.3 V supply to Wi-Fi SoC, voice assistant processor, and USB peripherals in always-on smart speaker. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator; interfaces with system PMIC via /SHDN for coordinated power sequencing. Use Value: 90%+ efficiency at 200 mA load minimizes thermal rise in sealed enclosure; 1 µA shutdown enables fast wake-from-sleep (<100 µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006XDDCT | 1.1 MHz switching frequency; higher minimum on-time limits max duty cycle to 96% vs. 97% for Y version. | Better EMI filtering margin at lower frequency; less suitable for ultra-small inductors (<2.2 µH). | Select X version when board-level EMI is prioritized over solution size; same pinout and FB reference. |
| TPS54202DDCR | 2.1 MHz, 4.5–28 V input, 2 A output; includes light-load PFM mode and adjustable soft-start; no integrated boot diode. | Higher current capability and wider VIN range; requires external bootstrap diode and larger output caps. | Choose TPS54202DDCR for designs needing >600 mA or tighter line/load regulation; not drop-in due to different pinout and external components. |
Compared with LMR14006YDDCT, the X version trades switching speed for EMI headroom and slightly lower thermal stress, while TPS54202DDCR offers higher current and flexibility at the cost of increased BOM count and layout effort - making LMR14006YDDCT optimal for compact, cost-sensitive 600 mA applications where integrated boot diode and minimal external parts are decisive.
Availability
LMR14006YDDCT is available at Aetrix Electronics and suitable for industrial sensor nodes, automotive body electronics, and portable medical instruments requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for LMR14006YDDCT 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 LMR14006YDDCT belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use in industrial and automotive power systems, emphasizing integration, thermal robustness, and minimal external component count.
FAQ
What is the maximum duty cycle supported by the LMR14006YDDCT?
The LMR14006YDDCT supports up to 97% maximum duty cycle, enabled by its CB–SW bootstrap UVLO circuit that refreshes the gate drive capacitor during low-side conduction. This allows operation down to VOUT ≈ 0.765 V even at high input voltages - critical for 12 V-to-3.3 V or 24 V-to-5 V conversions without external assist circuitry. The LMR14006YDDCT maintains regulation across this range without dropout-induced reset or brownout.
Does the LMR14006YDDCT require an external bootstrap diode?
No, the LMR14006YDDCT integrates the bootstrap recharge diode internally, eliminating the need for an external Schottky diode between VIN and CB. This reduces bill-of-materials count, saves PCB area, and improves reliability by removing a common failure point. Users only need a 100 nF ceramic capacitor between CB and SW pins - a key differentiator from competing buck regulators like the TPS54202DDCR, which requires external diode placement.
How does sleep mode function in the LMR14006YDDCT?
Sleep mode in the LMR14006YDDCT activates automatically when peak inductor current falls below ~80 mA and output voltage remains within regulation - reducing quiescent current to 28 µA without external control signals. This feature is implemented via internal current sensing and COMP node monitoring, not average load current. The LMR14006YDDCT exits sleep mode synchronously on the next clock edge when load demand increases, ensuring seamless transition without output droop or delay.
Can the LMR14006YDDCT be used with ceramic output capacitors only?
Yes, the LMR14006YDDCT is fully compatible with ceramic-only output capacitors - its internal compensation and current-mode architecture ensure stability with low-ESR ceramics (e.g., 10 µF X5R/X7R). Typical designs use 4.7–22 µF ceramic caps, avoiding electrolytics or tantalums. The LMR14006YDDCT's OVTP circuit further enhances transient response with low-COUT, preventing overshoot during rapid load removal - a key advantage over voltage-mode controllers requiring bulk capacitance.
What protection features are built into the LMR14006YDDCT?
The LMR14006YDDCT includes cycle-by-cycle overcurrent protection (1200 mA typical limit), thermal shutdown (170°C trip with 10°C hysteresis), input undervoltage lockout (4 V rising threshold), and overvoltage transient protection (OVTP) that disables the high-side switch if FB exceeds 108% of 0.765 V. These features operate autonomously without external components - the LMR14006YDDCT recovers automatically after fault clearance, maintaining system uptime in harsh environments.
LMR14006YDDCT 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):
- 38.8V
- Current - Output:
- 600mA
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR14006YDDCT FAQ
1.How can I place an order for LMR14006YDDCT through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14006YDDCT 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 LMR14006YDDCT reliable?
The price and inventory of LMR14006YDDCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14006YDDCT is usually 5 days.
3.What payment methods are accepted for LMR14006YDDCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14006YDDCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14006YDDCT?
LMR14006YDDCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14006YDDCT 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 LMR14006YDDCT?
For technical support, including LMR14006YDDCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14006YDDCT requirements.
6.How does Aetrix verify that LMR14006YDDCT is sourced from the original manufacturer or authorized distributors?
All LMR14006YDDCT 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 LMR14006YDDCT meets industry standards.
7.What is the process for return or replacement of LMR14006YDDCT?
All LMR14006YDDCT units undergo pre-shipment inspection (PSI). If there is an issue with LMR14006YDDCT, 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 LMR14006YDDCT part is unused and in its original packaging.
Return procedure for LMR14006YDDCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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