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Texas Instruments LMR14206XMKX/NOPB
- Part No.:
- LMR14206XMKX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR14206XMKX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 600MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,375
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Product details
Overview
LMR14206XMKX/NOPB from Texas Instruments is a PWM synchronous buck 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 powers point-of-load rails in industrial distributed power systems and battery-powered instrumentation.
For engineers reviewing the LMR14206XMKX/NOPB datasheet, LMR14206XMKX/NOPB pinout, LMR14206XMKX/NOPB application, or LMR14206XMKX/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 for rapid design validation.
Technical Context
The LMR14206XMKX/NOPB implements current-mode PWM control with an integrated high-side N-channel MOSFET and internal compensation network. Its 1.25 MHz fixed-frequency operation enables compact external component selection while maintaining low output ripple under load transients.
Protection architecture includes VIN undervoltage lockout (4.4V turn-on, 3.5V turn-off), gate-drive UVLO, thermal shutdown at 175°C, and cycle-by-cycle current limiting (1.15A typical). Soft-start is implemented externally via RC network on the SHDN pin, allowing user-defined ramp time without additional ICs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 42V - supports direct connection to 12V/24V/36V industrial rails and unregulated battery inputs. |
| 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 10–22 µH inductors and ceramic capacitors for minimal board area. |
| Feedback Reference | 0.765V ±1.8% - sets precise output voltage via resistor divider; enables 0.8V to 34V programmable outputs. |
| Quiescent Current | 16 µA typical in shutdown - extends battery life in always-on portable equipment. |
| Thermal Shutdown | 175°C activation / 155°C release - prevents permanent damage during overload or poor heatsinking. |
| RDS(ON) | 0.9Ω typical - minimizes conduction loss and improves efficiency up to 85% at mid-load. |
Pinout & Package
SOT-23-THIN (DDC) package: 6-pin, 2.97 mm × 1.65 mm × 1.0 mm body, gull-wing leads, RoHS-compliant matte tin lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CB | Bootstrap capacitor connection | Bias voltage for high-side FET gate drive; requires 0.15 µF ceramic cap between CB and SW. |
| GND | Power and signal ground | Primary return path for switch current, feedback network, and internal bias; must connect directly to power plane. |
| FB | Feedback input | Senses output voltage via resistor divider; 0.765V reference enables accurate regulation across temperature. |
| SHDN | Logic-level enable/disable | Pull ≥2.3V to enable; ≤0.9V to disable; supports soft-start via external RC ramp. |
| VIN | Main power input | Accepts 4.5V–42V; includes UVLO and overvoltage protection up to +45V absolute max. |
| SW | Switch node | Drives external inductor and catch diode; connects to CBOOT, L1, and D1 in standard buck topology. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation components-reduces BOM count and layout sensitivity. |
| Short-circuit protected | Current-limiting and thermal shutdown prevent failure during output faults or sustained overload. |
| Soft-start function | Configurable via SHDN pin RC network-controls inrush current and avoids input rail droop. |
| Low shutdown IQ | 16 µA typical-enables ultra-low-power standby modes in battery-operated devices. |
| WEBENCH® compatible | Fully supported in TI's online power design tool-enables real-time simulation, component selection, and thermal analysis. |
Applications
| Industrial Power Meters | Battery-Powered Handheld Instruments |
|---|---|
Use Scenario: Powering metrology ASICs and isolated ADCs in DIN-rail mounted energy meters with 24V/48V input rails. IC Role / Device Role / Timing Role: Primary step-down regulator converting 36V bus to 3.3V/5V logic supply with tight line/load regulation. Use Value: 42V input rating tolerates surges on industrial buses; 1.25 MHz switching minimizes EMI in sensitive measurement zones. | Use Scenario: Supplying mixed-signal SoCs and OLED displays in portable multimeters and thermal imagers. IC Role / Device Role / Timing Role: Main DC/DC converter from single-cell Li-ion (3.0–4.2V) or dual-cell (6–8.4V) battery packs. Use Value: 16 µA shutdown current preserves battery charge during sleep; thin SOT-23 package fits ultra-thin enclosures. |
| Point-of-Load Conversion | Space-Constrained Embedded Controllers |
Use Scenario: Generating 1.2V core voltage for ARM Cortex-M4 microcontrollers from 5V or 12V system rails. IC Role / Device Role / Timing Role: Local buck regulator placed adjacent to processor VDD pins to minimize IR drop and noise coupling. Use Value: 0.765V FB reference enables accurate low-voltage regulation; internal MOSFET eliminates external driver complexity. | Use Scenario: Powering FPGA I/O banks and communication PHYs (RS-485, CAN) on compact PLC modules. IC Role / Device Role / Timing Role: Secondary regulator deriving 3.3V/2.5V supplies from 12V backplane in high-density control cards. Use Value: SOT-23-THIN footprint saves PCB area vs. larger packages; 85% peak efficiency reduces thermal load in sealed housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR14006XDDAR | 40V max input, 600mA, same SOT-23-THIN package but higher RDS(ON) (1.2Ω typ), lower IQ in shutdown (10 µA). | Optimized for lower-cost 40V systems where 2V headroom margin is acceptable. | Select when cost sensitivity outweighs 2V input margin and slightly reduced efficiency. |
| TPS562201DDCR | 17V max input, 2A output, 6-pin SOT-23, integrated high-/low-side FETs, 500kHz–1.7MHz adjustable frequency. | Targets higher-current, lower-input applications (e.g., USB PD, 5V/12V systems) with greater flexibility. | Choose for >0.6A loads or when adjustable frequency and higher integration justify lower input voltage limit. |
Compared with LMR14206XMKX/NOPB, LMR14006XDDAR trades 2V input headroom for marginal quiescent current reduction, while TPS562201DDCR offers double the current and frequency tuning at the expense of 25V lower input capability-making LMR14206XMKX/NOPB optimal for 24–42V industrial and battery-derived supplies requiring robust surge tolerance.
Availability
LMR14206XMKX/NOPB is available at Aetrix Electronics and suitable for industrial distributed power applications, battery-powered handheld instruments, and space-constrained embedded controllers requiring stable component supply across extended temperature ranges (−40°C to +125°C).
Supply support for LMR14206XMKX/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 leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power conversion ICs.
The LMR14206XMKX/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 LMR14206XMKX/NOPB?
The LMR14206XMKX/NOPB has an absolute maximum input voltage rating of +45V, with normal operating range specified from 4.5V to 42V. Operation above 42V is not recommended for continuous use, as it exceeds the guaranteed performance envelope and may trigger internal protection circuits or reduce long-term reliability. The 42V upper limit ensures safe operation across 24V and 36V industrial bus standards with transient margin.
Does the LMR14206XMKX/NOPB require external compensation components?
No, the LMR14206XMKX/NOPB is internally compensated-no external compensation network is needed. This simplifies design, reduces bill-of-materials cost, and improves stability across varying output capacitor ESR values and load conditions. The internal compensation is optimized for standard ceramic output capacitors (22–100 µF) and inductors in the 10–22 µH range used with its 1.25 MHz switching frequency.
How is soft-start implemented on the LMR14206XMKX/NOPB?
Soft-start on the LMR14206XMKX/NOPB is implemented using the SHDN pin with an external RC network. Applying a voltage ramp (0V to ≥2.3V) to SHDN modulates the cycle-by-cycle current limit from minimum to full rating, controlling output voltage rise time and limiting inrush current. A typical implementation uses a resistor from VIN to SHDN and a capacitor from SHDN to GND, with values selected to achieve desired ramp duration while respecting SHDN pin leakage current limits (≤1.5 µA).
What package type and dimensions does the LMR14206XMKX/NOPB use?
The LMR14206XMKX/NOPB uses the SOT-23-THIN (DDC) package: 6-pin, gull-wing, with body dimensions of 2.97 mm × 1.65 mm × 1.0 mm max height. Pin 1 identification is marked by a notch or dimple per JEDEC MO-193. The package features matte tin lead finish, MSL Level-1 rating, and is optimized for high-density layouts with minimal thermal resistance (θJA = 121°C/W on standard 4-layer board).
Can the LMR14206XMKX/NOPB be used in automotive applications?
The LMR14206XMKX/NOPB is rated for −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-Q200–qualified alternatives such as the LM61480-Q1. Always verify compliance with vehicle-specific EMC, vibration, and lifetime requirements before deployment.
LMR14206XMKX/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
LMR14206XMKX/NOPB FAQ
1.How can I place an order for LMR14206XMKX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR14206XMKX/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 LMR14206XMKX/NOPB reliable?
The price and inventory of LMR14206XMKX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR14206XMKX/NOPB is usually 5 days.
3.What payment methods are accepted for LMR14206XMKX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR14206XMKX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR14206XMKX/NOPB?
LMR14206XMKX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR14206XMKX/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 LMR14206XMKX/NOPB?
For technical support, including LMR14206XMKX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR14206XMKX/NOPB requirements.
6.How does Aetrix verify that LMR14206XMKX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR14206XMKX/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 LMR14206XMKX/NOPB meets industry standards.
7.What is the process for return or replacement of LMR14206XMKX/NOPB?
All LMR14206XMKX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR14206XMKX/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 LMR14206XMKX/NOPB part is unused and in its original packaging.
Return procedure for LMR14206XMKX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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