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Texas Instruments LMR14206XMK/NOPB
- Part No.:
- LMR14206XMK/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14206XMK/NOPB.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,069
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Product details
Overview
LMR14206XMK/NOPB from Texas Instruments is a PWM synchronous step-down DC/DC regulator in SOT-23-THIN (DDC) package, delivering up to 0.6A output current with input voltage range 4.5V–42V, fixed 1.25 MHz switching frequency, and 0.765V feedback reference voltage. It serves as a compact point-of-load power supply for industrial distributed systems, battery-powered instruments, and 5V/12V/24V rail conditioning.
For engineers reviewing the LMR14206XMK/NOPB datasheet, LMR14206XMK/NOPB pinout, LMR14206XMK/NOPB application, or LMR14206XMK/NOPB equivalent, key selection criteria include its 42V max input rating, internal 0.9Ω high-side MOSFET, thermal shutdown protection, soft-start via SHDN pin, and compatibility with WEBENCH® Power Designer.
Technical Context
The LMR14206XMK/NOPB implements a current-mode PWM buck architecture with integrated high-side N-channel MOSFET and gate driver. Its control loop uses an error amplifier comparing FB voltage against 0.765V internal reference, driving a PWM comparator with slope compensation for stability across duty cycles up to 87%.
Protection functions include VIN under-voltage lockout (4.4V turn-on, 3.5V turn-off), gate-drive under-voltage lockout on CB pin, cycle-by-cycle current limiting (1.15A typical), and thermal shutdown at 175°C. Soft-start is implemented externally by applying a ramped voltage to the SHDN pin, modulating current limit during startup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - supports wide-input industrial and automotive rails without pre-regulation. |
| Output Current | Up to 0.6A - sufficient for powering microcontrollers, sensors, and analog front-ends in space-constrained designs. |
| Switching Frequency | 1.25 MHz (±25%) - enables use of small external inductors (e.g., 10–22 µH) and ceramic capacitors while maintaining low output ripple. |
| Feedback Reference | 0.765V ±1.8% - sets precise output voltage via resistor divider; enables 0.8V to 34V programmable output range. |
| Quiescent Current | 16 µA typical in shutdown - minimizes battery drain in always-on or low-power wake-up systems. |
| Thermal Shutdown | Engages at TJ = 175°C, disengages at 155°C - provides robust overtemperature protection without latch-up. |
| Package | SOT-23-THIN (DDC), 6-pin - 2.97 × 1.65 × 1.0 mm footprint ideal for portable and high-density PCB layouts. |
Pinout & Package
SOT-23-THIN (DDC) package: 6-pin, thin-profile surface-mount package with 1.0 mm maximum height, JEDEC MO-193 compliant, moisture sensitivity level 1 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap capacitor connection | Provides gate drive voltage for internal high-side MOSFET; requires 0.15 µF ceramic cap between CB and SW. |
| GND | Power ground reference | Primary return path for IC bias, feedback network, and power stage; must connect directly to system ground plane at COUT. |
| FB | Feedback input | Monitors output voltage via resistor divider; 0.765V reference enables accurate regulation independent of load or line variation. |
| SHDN | Logic-level enable/disable | Pull ≥2.3V to enable; ≤0.9V to disable; supports soft-start via RC ramp and reduces IQ to 16 µA in shutdown. |
| VIN | Main power input | Accepts 4.5V–42V unregulated input; includes UVLO (4.4V on/3.5V off) and internal ESD protection. |
| SW | Switch node output | Drives external inductor and catch diode; connects to CB capacitor and carries high-frequency pulsed current. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation components, reducing BOM count and layout complexity. |
| Short-circuit and thermal protection | Prevents damage during output faults or overload; auto-recovery after fault removal without latch-up. |
| Low RDS(ON) internal switch | 0.9Ω typical - improves efficiency (85% typical at 12V→3.3V/0.6A) and reduces thermal stress. |
| Soft-start via SHDN pin | Enables user-defined startup time using external RC network, preventing inrush current and output overshoot. |
| WEBENCH® Power Designer support | Full integration with TI's online design tool for automated component selection, efficiency simulation, and thermal analysis. |
Applications
| Industrial Power Meters | Battery-Powered Handheld Instruments |
|---|---|
Use Scenario: Compact energy meter with isolated MCU, ADC, and RF transceiver operating from 24V bus or Li-ion battery. IC Role / Device Role / Timing Role: Primary step-down regulator converting 24V or 12V input to stable 3.3V for digital logic and analog circuitry. Use Value: 42V input rating tolerates transient surges on industrial buses; 1.25 MHz switching allows miniature magnetics and low-profile layout. | Use Scenario: Portable multimeter or gas detector requiring long battery life and reliable low-noise 1.8V/3.3V rails. IC Role / Device Role / Timing Role: Main power converter supplying regulated voltage to microcontroller, display, and sensor interface. Use Value: 16 µA shutdown current extends battery runtime; internal compensation simplifies design for rapid prototyping. |
| Point-of-Load Conversion from 12V Rail | Space-Constrained Embedded Controllers |
Use Scenario: Industrial PLC module with FPGA and I/O drivers powered from centralized 12V backplane. IC Role / Device Role / Timing Role: Local DC/DC converter generating 1.2V core voltage and 3.3V I/O voltage near processor. Use Value: SOT-23-THIN package fits tight board real estate; 0.765V feedback reference enables accurate low-voltage regulation. | Use Scenario: Smart sensor node in building automation with Zigbee/Thread radio and environmental sensors. IC Role / Device Role / Timing Role: Single-chip power solution replacing discrete buck controller + MOSFET + compensation network. Use Value: Fully integrated design reduces component count and layout risk; thermal shutdown ensures reliability in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006XDDAR | 40V max input, same 0.6A rating and SOT-23-THIN package but 400 kHz switching frequency; higher efficiency at light loads due to PFM mode. | Preferred for ultra-low IQ (<5 µA) battery applications where 1.25 MHz noise is undesirable. | Select when lower EMI and extended battery life outweigh need for smallest passive components. |
| TPS54202DRCT | 28V max input, 2A output, 600 kHz–1.8 MHz adjustable frequency, integrated high/low-side FETs; requires external compensation. | Suitable for higher-current or dynamically adjustable output voltage designs where footprint allows larger QFN package. | Choose when >0.6A load or programmable frequency/soft-start timing is required; not drop-in compatible. |
Compared with LMR14206XMK/NOPB, LMR14006XDDAR offers lower quiescent current and PFM operation for battery longevity but sacrifices input voltage headroom and switching speed; TPS54202DRCT delivers higher current and flexibility at the cost of increased layout complexity and larger package size.
Availability
LMR14206XMK/NOPB is available at Aetrix Electronics and suitable for industrial power meters, battery-powered handheld instruments, and point-of-load conversions requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LMR14206XMK/NOPB 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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with over 90 years of innovation history.
The LMR14206XMK/NOPB belongs to TI's SIMPLE SWITCHER® family-designed specifically for ease-of-use, minimal external component count, and robust operation in harsh industrial environments without requiring expert power design knowledge.
FAQ
What is the maximum input voltage rating for the LMR14206XMK/NOPB?
The LMR14206XMK/NOPB has an absolute maximum input voltage rating of +45V, with normal operation specified from 4.5V to 42V. Exceeding 42V may trigger undervoltage lockout or cause permanent damage if sustained beyond absolute maximum limits. The device includes input UVLO with 4.4V turn-on and 3.5V turn-off thresholds to ensure safe startup and shutdown behavior across this range.
Does the LMR14206XMK/NOPB require external compensation components?
No, the LMR14206XMK/NOPB features an internally compensated current-mode control loop, eliminating the need for external compensation networks. This simplifies design, reduces bill-of-materials count, and improves layout robustness-especially critical in high-density or fast-turnaround development scenarios where tuning loop stability manually would add significant effort.
How is soft-start implemented on the LMR14206XMK/NOPB?
Soft-start on the LMR14206XMK/NOPB is implemented by applying a controlled voltage ramp to the SHDN pin using an external RC network. As the SHDN voltage rises from 0V to 2.3V, the internal current limit scales linearly from minimum to full 1.15A, thereby controlling output voltage rise time and limiting inrush current. No additional pins or configuration registers are needed.
What package type and dimensions does the LMR14206XMK/NOPB use?
The LMR14206XMK/NOPB uses the SOT-23-THIN (DDC) package: 6-pin, JEDEC MO-193 compliant, with footprint dimensions of 2.97 mm × 1.65 mm and maximum height of 1.0 mm. Pin 1 orientation follows quadrant Q3 per tape-and-reel specification, and the package is rated for moisture sensitivity level 1 (MSL-1) with unlimited floor life at ≤30°C/60% RH.
Can the LMR14206XMK/NOPB be used in automotive applications?
The LMR14206XMK/NOPB operates across −40°C to +125°C junction temperature and supports input transients up to 45V, making it suitable for certain automotive body electronics and infotainment subsystems-but it is not AEC-Q200 qualified. For safety-critical or engine-bay applications, TI recommends AEC-Q100 qualified alternatives such as the LM61480-Q1 or TPS54560Q.
LMR14206XMK/NOPB 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):
- 4.5V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.765V
- Voltage - Output (Max):
- 34V
- Current - Output:
- 600mA
- Frequency - Switching:
- 1.25MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR14206XMK/NOPB FAQ
1.How can I place an order for LMR14206XMK/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14206XMK/NOPB 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 LMR14206XMK/NOPB reliable?
The price and inventory of LMR14206XMK/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14206XMK/NOPB is usually 5 days.
3.What payment methods are accepted for LMR14206XMK/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14206XMK/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14206XMK/NOPB?
LMR14206XMK/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14206XMK/NOPB 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 LMR14206XMK/NOPB?
For technical support, including LMR14206XMK/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14206XMK/NOPB requirements.
6.How does Aetrix verify that LMR14206XMK/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR14206XMK/NOPB 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 LMR14206XMK/NOPB meets industry standards.
7.What is the process for return or replacement of LMR14206XMK/NOPB?
All LMR14206XMK/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR14206XMK/NOPB, 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 LMR14206XMK/NOPB part is unused and in its original packaging.
Return procedure for LMR14206XMK/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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