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Texas Instruments LMR14006YDDCR
- Part No.:
- LMR14006YDDCR
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14006YDDCR.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,903
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Product details
Overview
LMR14006YDDCR from Texas Instruments is a fixed-frequency PWM synchronous buck regulator IC delivering up to 600 mA output current with 4 V–40 V input range, 2.1 MHz switching frequency, 0.765 V feedback reference, and ultra-low 28 µA sleep-mode quiescent current - designed for compact, battery-sensitive industrial and automotive power conditioning.
For engineers reviewing the LMR14006YDDCR datasheet, LMR14006YDDCR pinout, LMR14006YDDCR application, or LMR14006YDDCR equivalent, key selection criteria include its TSOT-6L package footprint, integrated high-side MOSFET with bootstrap gate drive (CB/SW), internal soft-start and compensation, and thermal/overcurrent protection - all critical for space-constrained, low-quiescent-power DC/DC designs.
Technical Context
The LMR14006YDDCR implements constant-frequency peak current-mode control with an internal 2.1 MHz oscillator, enabling fast transient response and simplified loop compensation. Its architecture integrates a boot regulator, leading-edge blanking, slope compensation, and COMP node clamping for cycle-by-cycle current limiting.
It operates in continuous conduction mode (CCM) and supports high duty cycles via CB-to-SW UVLO monitoring and automatic capacitor refresh; the 0.765 V precision reference enables accurate output voltage setting via external resistor divider on FB, while /SHDN provides high-voltage-tolerant enable control with 1 µA shutdown current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V - supports wide-input industrial and automotive sources including 12 V/24 V battery rails and unregulated supplies. |
| Switching Frequency | 2.1 MHz (fixed) - enables use of small 3.3 µH inductors and 10 µF ceramic output capacitors for minimal solution size. |
| Output Current | Up to 600 mA - sufficient for powering microcontrollers, sensors, and interface ICs in portable and embedded systems. |
| Feedback Reference | 0.765 V (±1.5%) - sets output voltage accuracy and stability via external R1/R2 divider; enables 3.3 V, 5 V, or 12 V outputs. |
| Quiescent Current | 28 µA in sleep mode - extends battery life in always-on or low-duty-cycle applications such as remote sensors and handheld instruments. |
| Shutdown Current | 1 µA - minimizes leakage during system standby, critical for long-term energy harvesting or backup power designs. |
| Thermal Shutdown | 170 °C trip, 160 °C hysteresis - protects against sustained overload or poor PCB thermal design without requiring external circuitry. |
Pinout & Package
LMR14006YDDCR 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 in compact layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap bias supply | Connects external 100 nF ceramic capacitor to SW; supplies gate drive voltage for internal high-side MOSFET. |
| GND | Power ground | Main return path for input, output, and internal circuits; must be connected to low-impedance PCB ground plane. |
| FB | Feedback input | Senses output voltage via resistor divider; regulates output by comparing to 0.765 V internal reference. |
| /SHDN | Enable/disable control | High-voltage-tolerant logic input; pull below 1.2 V to disable (1 µA shutdown), float or tie to VIN to enable. |
| VIN | Main power input | Supplies internal bias and drives high-side MOSFET drain; accepts 4–40 V with -1 V to 45 V absolute max rating. |
| SW | Switch node | Connects to inductor, catch diode, and CB capacitor; carries high dv/dt switching waveform and pulsed current. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated boot recharge diode | Eliminates need for external bootstrap diode, reducing BOM count and layout complexity in TSOT-6L footprint. |
| Internal soft-start | Prevents inrush current at startup by gradually ramping COMP node voltage, avoiding output overshoot and input stress. |
| Overvoltage transient protection (OVTP) | Clamps high-side switch when FB exceeds 108% of 0.765 V reference, suppressing output overshoot during load unload. |
| Pulse-by-pulse current limit | Monitors peak switch current each cycle and disables high-side MOSFET if limit (1200 mA typ.) is exceeded. |
| UVLO with adjustable threshold | Fixed 4 V rising / 3 V falling input UVLO; extended threshold possible using resistive divider on /SHDN pin. |
Applications
| Industrial Distributed Power | Automotive Body Electronics |
|---|---|
|
Use Scenario: Powering PLC I/O modules, field transmitters, and sensor nodes from 24 V DC bus with strict thermal and size constraints. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24 V bus to 5 V or 3.3 V for MCU, ADC, and communication ICs. Use Value: 2.1 MHz operation enables <10 mm² total solution size; 28 µA sleep current preserves bus uptime during idle periods. |
Use Scenario: Supplying infotainment displays, door module controllers, and lighting ECUs from vehicle battery (9–16 V). IC Role / Device Role / Timing Role: Compact, high-efficiency buck converter meeting AEC-Q200 ambient temperature and transient requirements. Use Value: 40 V absolute max input withstands load-dump transients; integrated protection avoids need for external TVS or current-sense circuitry. |
| Battery-Powered Handheld Instruments | Portable Media Players |
|
Use Scenario: Long-life portable multimeters, thermal imagers, and gas detectors operating from two-cell Li-ion or alkaline stacks. IC Role / Device Role / Timing Role: Main system regulator delivering regulated 3.3 V from variable 3–9 V battery input with ultra-low quiescent draw. Use Value: 1 µA shutdown current prevents battery drain during storage; sleep mode maintains regulation down to ~30 mA load. |
Use Scenario: Power management in compact audio players where board area and thermal performance are critical. IC Role / Device Role / Timing Role: Secondary voltage rail generator for DSP, codec, and display backlight drivers. Use Value: TSOT-6L package fits tight form factors; 2.1 MHz switching avoids audible noise and simplifies EMI filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006XDDCR | 1.1 MHz switching frequency; higher minimum on-time limits max duty cycle vs. Y version. | Better suited for lower input-output differential (e.g., 5 V → 3.3 V) where 2.1 MHz is unnecessary. | Select X version when board-level EMI filtering favors lower frequency or when larger inductors are preferred. |
| TPS54202DDCR | 2.1 MHz, 4.5–28 V input, 2 A output, integrated FETs, but no sleep mode - 40 µA typical IQ. | Higher current capability and wider input range, but lacks ultra-low sleep current for battery longevity. | Choose TPS54202DDCR only when >600 mA load or >28 V input is required; not drop-in due to different pinout and FB voltage. |
Compared with LMR14006YDDCR, the X variant trades switching speed for margin in high-duty-cycle operation, while TPS54202DDCR offers higher current at the cost of sleep-mode efficiency and pin compatibility - making LMR14006YDDCR optimal for space- and battery-constrained 600 mA designs.
Availability
LMR14006YDDCR is available at Aetrix Electronics and suitable for industrial distributed power systems, automotive body electronics, and battery-powered handheld instruments requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for LMR14006YDDCR 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 LMR14006YDDCR belongs to TI's SIMPLE SWITCHER® family - engineered for ease-of-use, minimal external components, and robust operation in harsh environments like factory automation and vehicle subsystems.
FAQ
What is the switching frequency of the LMR14006YDDCR?
The LMR14006YDDCR operates at a fixed 2.1 MHz switching frequency, enabling compact designs with small inductors (e.g., 3.3 µH) and ceramic output capacitors. This frequency is factory-trimmed and not user-adjustable; it differs from the 1.1 MHz LMR14006XDDCR variant and directly impacts EMI profile and component sizing.
How does the LMR14006YDDCR achieve ultra-low quiescent current?
The LMR14006YDDCR achieves 28 µA quiescent current in sleep mode by dynamically disabling switching and gate drive circuits when output regulation is maintained and peak inductor current falls below ~80 mA. This behavior is intrinsic to the IC's control architecture and requires no external configuration - it activates automatically under light-load conditions.
Can the LMR14006YDDCR be used without an external Schottky diode?
Yes - the LMR14006YDDCR integrates a high-side MOSFET but requires an external catch diode (e.g., 1N5819 or equivalent Schottky) between SW and GND. Unlike synchronous buck regulators, it does not integrate a low-side switch; the diode completes the current path during the off-time and must be rated for ≥600 mA average current and ≥40 V PIV.
What is the purpose of the CB pin on the LMR14006YDDCR?
The CB pin on the LMR14006YDDCR provides gate drive voltage to the internal high-side MOSFET via a bootstrap capacitor connected between CB and SW. During the low-side conduction phase, the capacitor recharges through an internal regulator. This architecture eliminates the need for a separate gate driver supply while supporting high duty cycles up to 97%.
Does the LMR14006YDDCR require external compensation components?
No - the LMR14006YDDCR features internal compensation, meaning no external Type II or Type III compensation network is needed. The error amplifier, COMP node, and frequency compensation are fully integrated, allowing stable operation with only the required input/output capacitors, inductor, feedback resistors, and CB capacitor.
LMR14006YDDCR 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:
- 2.1MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR14006YDDCR FAQ
1.How can I place an order for LMR14006YDDCR through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14006YDDCR 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 LMR14006YDDCR reliable?
The price and inventory of LMR14006YDDCR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14006YDDCR is usually 5 days.
3.What payment methods are accepted for LMR14006YDDCR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14006YDDCR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14006YDDCR?
LMR14006YDDCR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14006YDDCR 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 LMR14006YDDCR?
For technical support, including LMR14006YDDCR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14006YDDCR requirements.
6.How does Aetrix verify that LMR14006YDDCR is sourced from the original manufacturer or authorized distributors?
All LMR14006YDDCR 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 LMR14006YDDCR meets industry standards.
7.What is the process for return or replacement of LMR14006YDDCR?
All LMR14006YDDCR units undergo pre-shipment inspection (PSI). If there is an issue with LMR14006YDDCR, 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 LMR14006YDDCR part is unused and in its original packaging.
Return procedure for LMR14006YDDCR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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