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Texas Instruments LMR12007XMKX
- Part No.:
- LMR12007XMKX
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR12007XMKX.pdf
- Description:
- IC REG BUCK ADJ 750MA SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:4,227
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Product details
Overview
LMR12007XMKX from Texas Instruments is a monolithic, current-mode PWM step-down DC-DC regulator in a 6-pin Thin SOT-23 package. It delivers up to 750mA output current with 1.6MHz fixed switching frequency, 3.0V–18V input range, and 1.25V–16V adjustable output voltage using external resistors. It integrates a 350mΩ NMOS switch and supports local point-of-load regulation in space-constrained battery-powered devices.
For engineers reviewing the LMR12007XMKX datasheet, LMR12007XMKX pinout, LMR12007XMKX application, or LMR12007XMKX equivalent, key selection criteria include its 1.6MHz operation enabling ultra-small inductors, 30nA shutdown current for low-power systems, internal soft-start for controlled startup, and thermal shutdown protection for reliable operation across −40°C to +125°C junction temperature.
Technical Context
The LMR12007XMKX employs current-mode PWM control with internal compensation and a fixed 1.6MHz oscillator, supporting duty cycles from 2% to 92%. Its bootstrap gate-drive architecture (BOOST–SW ≥ 1.6V) enables efficient NMOS switching while maintaining stable regulation down to 1.25V output.
It features cycle-by-cycle current limiting (1.5A typical), undervoltage lockout (2.74V rising threshold), output overvoltage protection (10% above 1.25V reference), and internal soft-start with ~200µs ramp time-enabling robust transient response and safe power-up sequencing without external timing components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6MHz - enables use of ≤4.7µH inductors and compact ceramic capacitors, minimizing PCB area. |
| Input Voltage Range | 3.0V to 18V - supports wide-input applications including USB PD, industrial rails, and automotive subsystems. |
| Output Current | 750mA - sufficient for powering microcontrollers, sensors, and interface ICs in portable electronics. |
| Feedback Reference | 1.25V ±2% - sets output voltage via external resistor divider (e.g., R1=2kΩ, R2=10kΩ yields 3.3V). |
| Shutdown Current | 30nA - preserves battery life in always-on or sleep-mode systems like IoT endpoints. |
| Internal NMOS RDS(ON) | 350mΩ - limits conduction loss at full load, supporting >90% peak efficiency at 5V→3.3V/500mA. |
| Operating Junction Temp | −40°C to +125°C - qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
LMR12007XMKX is housed in a 6-pin Thin SOT-23 package (Package Number DDC), measuring 2.9mm × 1.6mm × 0.9mm with gull-wing leads and Pin 1 marked by indentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BOOST | Bootstrap supply node | Drives NMOS gate; requires 0.01µF X7R ceramic capacitor between BOOST and SW to sustain ≥2.5V gate drive above SW during on-time. |
| GND | Signal and power ground | Reference for feedback network and internal regulators; bottom resistor of FB divider must connect here for accurate regulation. |
| FB | Voltage feedback input | High-impedance node sensing output via resistor divider; trace must be short and routed away from noisy nodes to avoid regulation error. |
| EN | Enable control input | Logic-high (>1.8V) enables regulation; floating or >VIN+0.3V risks damage; logic-low (<0.4V) disables with 30nA quiescent draw. |
| VIN | Main input supply | Accepts 3V–18V; requires local 10µF X5R ceramic bypass capacitor placed adjacent to pin with low-ESL layout. |
| SW | Power switch output | Connects to inductor, catch diode cathode, and BOOST capacitor; high dv/dt node requiring tight loop area and ground plane isolation. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 1.6MHz switching | Enables consistent EMI profile and eliminates external frequency-setting components; supports <1mm height designs with 4.7µH inductors. |
| Internal soft-start | Ramps internal reference from 0V to 1.25V over ~200µs, limiting inrush current and preventing output overshoot during startup. |
| Current-mode control | Provides inherent cycle-by-cycle current limiting (1.5A typ), fast transient response, and stable operation across input/output variations without external compensation. |
| Thermal shutdown | Disables switching when junction temperature exceeds 165°C, resuming only after cooling to ~150°C-prevents permanent damage under overload or poor heatsinking. |
| Output overvoltage protection | Shuts off NMOS switch if FB voltage exceeds 1.375V (10% above 1.25V reference), protecting downstream loads from fault-induced overvoltage. |
Applications
| USB-Powered Devices | Battery-Powered IoT Sensors |
|---|---|
Use Scenario: Powering USB-C peripheral modules (e.g., USB-to-UART bridges, HID controllers) from 5V bus with tight board space constraints. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 3.3V/750mA from 5V input; operates at 1.6MHz to minimize inductor footprint. Use Value: Enables single-layer PCB layout with 4.7µH inductor and 0805 capacitors, reducing BOM cost and assembly complexity versus lower-frequency alternatives. | Use Scenario: Supplying ultra-low-power microcontrollers (e.g., MSP430, nRF52) and environmental sensors in coin-cell or Li-ion powered edge nodes. IC Role / Device Role / Timing Role: Core power management IC providing 1.8V or 3.3V rail with 30nA shutdown current to extend battery life beyond 5 years in sleep mode. Use Value: Maintains regulation stability across battery discharge (3.0V–4.2V), while internal soft-start prevents brownout during wake-up transitions. |
| Notebook Subsystem Regulation | HDD Core Power |
Use Scenario: Generating auxiliary 1.2V or 1.5V rails for DDR memory termination or PCIe clock buffers in thin-and-light notebooks. IC Role / Device Role / Timing Role: Local point-of-load converter placed near SoC die; uses 1.6MHz switching to avoid interference with high-speed serial links. Use Value: Achieves >88% efficiency at 750mA load with minimal thermal rise on compact thermal pads, eliminating need for heatsinks or airflow. | Use Scenario: Providing 5V or 3.3V core power to HDD controller ASICs and motor drivers in consumer storage enclosures. IC Role / Device Role / Timing Role: High-reliability buck regulator operating continuously across −40°C to +85°C ambient; leverages thermal shutdown and UVLO for robustness. Use Value: Withstands input transients up to 22V and maintains regulation during spin-up surges, reducing risk of controller reset or data corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR12007YMKX | 550kHz switching frequency, 90–96% max duty cycle vs. 1.6MHz/92% for LMR12007XMKX; identical pinout and package. | Better efficiency at light loads and higher VIN/VOUT ratios; larger inductors required (e.g., 10µH), increasing solution size. | Select LMR12007YMKX when board area is less critical than peak efficiency at 5V→1.2V conversion. |
| TPS62231DRVR | 1.6MHz fixed frequency, 3V–5.5V input, 700mA output, 2.5µA quiescent current in PWM mode-but no 30nA shutdown state. | Limited to low-input applications; lacks BOOST pin architecture, requiring external gate driver for high-side NMOS in wide-VIN designs. | Choose TPS62231DRVR only for 3.3V/5V input systems where ultra-low IQ in active mode outweighs shutdown current and input range needs. |
Compared with LMR12007YMKX, LMR12007XMKX trades slightly lower light-load efficiency for significantly smaller passive components and better EMI control via higher fundamental frequency; versus TPS62231DRVR, it provides wider input range, true nanoscale shutdown, and integrated bootstrap drive-making it uniquely suited for 3V–18V battery or adapter-powered systems demanding minimal footprint and maximum reliability.
Availability
LMR12007XMKX is available at Aetrix Electronics and suitable for USB-powered devices, battery-powered IoT sensors, notebook subsystem regulation, and HDD core power applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LMR12007XMKX 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-efficiency DC-DC conversion.
The LMR12007XMKX belongs to TI's LMR series of monolithic buck regulators, designed specifically for space-constrained, high-frequency point-of-load applications where minimal external components, robust thermal performance, and ultra-low shutdown current are essential.
FAQ
What is the switching frequency of the LMR12007XMKX and how does it affect design?
The LMR12007XMKX operates at a fixed 1.6MHz switching frequency. This allows designers to use small surface-mount inductors (e.g., 4.7µH) and ceramic capacitors, minimizing PCB area and enabling compact solutions for portable electronics. The high frequency also shifts EMI energy to a band where filtering is more manageable, though careful layout of the SW node remains critical to control radiated noise.
Does the LMR12007XMKX require an external bootstrap capacitor, and what value is recommended?
Yes, the LMR12007XMKX requires a 0.01µF X7R or X5R ceramic capacitor between the BOOST and SW pins to sustain proper gate drive for the internal NMOS switch. TI specifies a minimum voltage rating of 6.3V; this capacitor must be placed as close as possible to the IC with short, low-inductance traces to ensure stable 1.6MHz operation and prevent gate drive collapse under load.
How does the enable (EN) pin function on the LMR12007XMKX, and what are its voltage thresholds?
The EN pin on the LMR12007XMKX controls device operation: a logic-high signal above 1.8V enables regulation, while a logic-low below 0.4V places the device in shutdown mode with 30nA quiescent current. The pin must never float or exceed VIN + 0.3V to avoid damage. This precise threshold enables clean power sequencing in multi-rail systems without external level-shifting circuitry.
What output voltage range can be set using the feedback (FB) pin of the LMR12007XMKX?
The LMR12007XMKX supports an adjustable output voltage range from 1.25V to 16V, set by an external resistor divider connected to the FB pin. The internal 1.25V ±2% reference determines VOUT = 1.25V × (1 + R1/R2). For example, using R2 = 10kΩ and R1 = 2kΩ yields 3.3V; accuracy depends on resistor tolerance and layout of the high-impedance FB trace.
Is thermal shutdown protection included in the LMR12007XMKX, and how does it behave?
Yes, the LMR12007XMKX includes thermal shutdown that disables the internal NMOS switch when junction temperature exceeds 165°C. Operation resumes automatically once the die cools to approximately 150°C. This protection is independent of load current or ambient conditions and ensures device survival under sustained overload, poor heatsinking, or high-temperature environments-critical for unattended industrial deployments.
LMR12007XMKX 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):
- 3V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 750mA
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR12007XMKX FAQ
1.How can I place an order for LMR12007XMKX through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR12007XMKX 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 LMR12007XMKX reliable?
The price and inventory of LMR12007XMKX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR12007XMKX is usually 5 days.
3.What payment methods are accepted for LMR12007XMKX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR12007XMKX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR12007XMKX?
LMR12007XMKX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR12007XMKX 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 LMR12007XMKX?
For technical support, including LMR12007XMKX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR12007XMKX requirements.
6.How does Aetrix verify that LMR12007XMKX is sourced from the original manufacturer or authorized distributors?
All LMR12007XMKX 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 LMR12007XMKX meets industry standards.
7.What is the process for return or replacement of LMR12007XMKX?
All LMR12007XMKX units undergo pre-shipment inspection (PSI). If there is an issue with LMR12007XMKX, 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 LMR12007XMKX part is unused and in its original packaging.
Return procedure for LMR12007XMKX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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