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Texas Instruments LMR12010YMK/NOPB
- Part No.:
- LMR12010YMK/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR12010YMK/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:3,525
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Product details
Overview
LMR12010YMK/NOPB from Texas Instruments is a 3-V to 20-V input, 1-A synchronous step-down DC/DC switching regulator in a 6-pin SOT-23-THIN package, operating at a fixed 3 MHz switching frequency with internal compensation, 0.8 V feedback reference, and 300 mΩ NMOS power switch - used for space-constrained point-of-load conversion in battery-powered instruments and industrial distributed power systems.
For engineers reviewing the LMR12010YMK/NOPB datasheet, LMR12010YMK/NOPB pinout, LMR12010YMK/NOPB application, or LMR12010YMK/NOPB equivalent, key selection considerations include its 3 MHz operation enabling ultra-small external magnetics, 30 nA shutdown current for battery longevity, current-mode control for fast transient response, and integrated soft-start and thermal shutdown for robust system-level deployment.
Technical Context
The LMR12010YMK/NOPB implements constant-frequency current-mode PWM control with an internally set 3 MHz oscillator, supporting minimum on-times down to 13 ns to maintain regulation across 3–20 V input while delivering up to 1 A output. Its internal 300 mΩ NMOS switch and bootstrap gate-drive architecture (requiring external BOOST capacitor) enable high power density in a 2.97 × 1.65 × 1 mm footprint.
Feedback is sensed via a resistive divider connected to the FB pin referenced to a precise 0.800 V (±2%) internal bandgap, with line regulation of 0.01%/V and ±250 nA bias current. Protection includes cycle-by-cycle current limiting (1.7 A typical), thermal shutdown at 165°C, undervoltage lockout (2.90 V rising threshold), and output overvoltage protection triggered at 10% above VREF.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 20 V - supports direct regulation from common rails including 3.3 V, 5 V, 12 V, and wide-input industrial supplies. |
| Output Current | Up to 1 A - sufficient for powering microcontrollers, sensors, and communication ICs without external pass devices. |
| Switching Frequency | 3 MHz - enables use of sub-3 mm × 3 mm inductors (e.g., 2.2 µH) and low-ESR ceramic capacitors, minimizing PCB area. |
| Feedback Reference | 0.800 V ±2% - sets output voltage via external resistor divider; allows outputs from 0.8 V to 17 V with high accuracy. |
| Shutdown Quiescent Current | 30 nA typical - extends battery life in always-on or sleep-mode applications such as portable meters and IoT endpoints. |
| Internal Switch RDS(ON) | 300 mΩ typical - reduces conduction loss and improves efficiency at 1-A load, especially with low-VOUT configurations. |
| Current Limit Threshold | 1.7 A typical - provides robust short-circuit and overload protection without requiring external sensing components. |
Pinout & Package
Package: SOT-23-THIN (6-pin), body size 2.90 mm × 1.60 mm, 1 mm height - optimized for high-density layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOST | Bootstrap supply node | Drives NMOS gate during high-side switch conduction; requires external 0.1 µF ceramic capacitor between BOOST and SW pins. |
| 2 - GND | Signal and power ground | Reference for feedback network and internal circuitry; bottom resistor of FB divider must connect directly here for regulation accuracy. |
| 3 - FB | Voltage feedback input | Senses output via resistive divider; internal 0.8 V reference enables precise output programming with <0.01%/V line regulation. |
| 4 - EN | Enable control input | Logic-high (>1.8 V) enables regulation; logic-low (<0.4 V) disables switching and reduces IQ to 30 nA - no pull-up required. |
| 5 - VIN | Main input supply | Accepts 3–20 V; requires local 10 µF ceramic bypass capacitor to suppress switching noise and maintain stability. |
| 6 - SW | Power switch output | Connects to inductor and catch diode; swings between ~0 V (off) and VIN – ILOAD×RDS(ON) (on); drives external bootstrap capacitor during off-time. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated current-mode control | Eliminates need for external compensation network - simplifies design, reduces BOM count, and ensures stable operation across 0.8–17 V output range. |
| 3 MHz fixed-frequency operation | Enables use of compact 2.2 µH inductors and 10–22 µF ceramic output capacitors - cuts solution size by >40% vs. 1.6 MHz variants. |
| Ultra-low shutdown IQ (30 nA) | Extends battery runtime in standby mode - critical for handheld instruments and remote sensors with multi-year operational requirements. |
| Integrated soft-start (200 µs ramp) | Controls output voltage rise time to limit inrush current into large output capacitance - prevents input rail droop and avoids false resets. |
| Thermal shutdown & OVP protection | Shuts down NMOS switch if junction exceeds 165°C or FB rises >10% above 0.8 V - protects downstream loads and maintains system reliability under fault conditions. |
Applications
| Point-of-Load Conversion | Battery-Powered Instruments |
|---|---|
Use Scenario: Regulating 5 V or 12 V system rail down to 1.8 V or 3.3 V for MCU core or I/O supply in compact embedded controllers. IC Role / Device Role / Timing Role: Primary step-down regulator providing tightly regulated, low-noise DC power with fast transient response to dynamic digital loads. Use Value: 3 MHz switching minimizes inductor size and output ripple, while internal compensation eliminates tuning effort - accelerating layout and validation. | Use Scenario: Powering handheld multimeters, gas detectors, or portable medical monitors operating from single-cell Li-ion or dual-cell alkaline batteries. IC Role / Device Role / Timing Role: Main DC/DC converter delivering 1 A at 3.3 V with ultra-low shutdown current to maximize battery service life. Use Value: 30 nA shutdown IQ and 90% peak efficiency at light loads extend usable battery capacity by >25% versus comparable 1.6 MHz regulators. |
| Industrial Distributed Power | Power Meters & Smart Sensors |
Use Scenario: Local regulation in DIN-rail mounted PLC I/O modules where board space is constrained and input voltage varies from 9–36 V DC. IC Role / Device Role / Timing Role: Compact, rugged buck converter handling wide input range and delivering stable 5 V for analog front-ends and isolation interfaces. Use Value: 20 V absolute max input rating and thermal shutdown ensure reliable operation under industrial transients and ambient temperatures up to +125°C. | Use Scenario: Supplying metrology ASICs and RF transceivers in utility-grade electricity meters requiring long-term calibration stability and low EMI. IC Role / Device Role / Timing Role: High-frequency, low-ripple power source with precise 0.8 V reference enabling accurate ADC reference generation. Use Value: 0.01%/V line regulation and ±2% VFB tolerance maintain output accuracy across line and temperature - critical for Class 0.2 meter compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR12006YMK/NOPB | Same SOT-23-THIN package and 3 MHz frequency, but rated for 0.6 A output and lower RDS(ON) (200 mΩ). | Lower output current capability limits use to sub-600 mA loads; better suited for ultra-low-power sensor nodes than full-feature instrumentation. | Select when load current ≤0.6 A and higher efficiency at light loads is prioritized over 1-A headroom. |
| TPS62130ARGTR | 3-MHz synchronous buck in 3-mm × 3-mm QFN-16; 3-A rating, 0.6 V reference, and I2C programmability - no BOOST pin required. | Requires different layout, external compensation, and digital interface; lacks integrated soft-start and UVLO hysteresis of LMR12010YMK/NOPB. | Choose for higher-current or programmable-output designs where QFN thermal performance and feature flexibility outweigh SOT-23 size advantage. |
Compared with LMR12010YMK/NOPB, LMR12006YMK/NOPB offers reduced conduction loss at lower currents but sacrifices 40% load capacity, while TPS62130ARGTR delivers triple the output current and digital control at the cost of larger footprint, greater design complexity, and loss of the ultra-low 30 nA shutdown IQ.
Availability
LMR12010YMK/NOPB is available at Aetrix Electronics and suitable for point-of-load conversion, battery-powered instrumentation, and industrial distributed power applications requiring stable component supply, long-lifecycle availability, and consistent parametric performance across production batches.
Supply support for LMR12010YMK/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 designing analog ICs, embedded processors, and system solutions for industrial, automotive, and personal electronics markets.
The LMR12010YMK/NOPB belongs to TI's high-frequency monolithic buck regulator product line, engineered specifically for space-constrained, high-efficiency DC/DC conversion in portable and distributed power systems where minimal external components and rapid design turnaround are essential.
FAQ
What is the switching frequency of the LMR12010YMK/NOPB?
The LMR12010YMK/NOPB operates at a fixed 3 MHz switching frequency, as indicated by the "Y" suffix in its part number. This high frequency enables the use of miniature surface-mount inductors (e.g., 2.2 µH) and low-ESR ceramic capacitors, significantly reducing total solution size compared to lower-frequency alternatives. The oscillator is fully internal - no external timing components are required.
Does the LMR12010YMK/NOPB require an external bootstrap capacitor?
Yes, the LMR12010YMK/NOPB requires a 0.1 µF ceramic capacitor connected between the BOOST and SW pins to sustain gate drive for its internal NMOS switch. This capacitor is charged during the SW low phase via the internal boost diode and must be placed as close as possible to the BOOST/SW pins to minimize parasitic inductance and ensure reliable high-side switching at 3 MHz.
What is the feedback reference voltage of the LMR12010YMK/NOPB?
The LMR12010YMK/NOPB uses a precision 0.800 V ±2% internal reference voltage at the FB pin. This value is trimmed during production and remains stable across temperature (±10 ppm/°C typical drift). Output voltage is set using a two-resistor divider from VOUT to GND, with the FB node connected to the divider midpoint - enabling accurate outputs from 0.8 V to 17 V.
Can the LMR12010YMK/NOPB operate with a 2.5-V input supply?
No, the LMR12010YMK/NOPB cannot operate with a 2.5-V input. Its undervoltage lockout (UVLO) rising threshold is 2.90 V typical, and the absolute minimum recommended input is 3 V. Attempting to power it below 2.74 V will prevent startup, and sustained operation below 3 V risks erratic regulation or failure to maintain output due to insufficient gate drive margin for the internal NMOS switch.
How does the LMR12010YMK/NOPB handle thermal overload?
The LMR12010YMK/NOPB integrates thermal shutdown that disables the internal NMOS switch when junction temperature exceeds 165°C. Operation resumes only after the die cools to approximately 150°C, providing hysteresis to prevent cycling. This protection is independent of current limit and operates under all load and ambient conditions - ensuring reliability in sealed enclosures or high-temperature industrial environments.
LMR12010YMK/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):
- 3V
- Voltage - Input (Max):
- 20V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 17V
- Current - Output:
- 1A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR12010YMK/NOPB FAQ
1.How can I place an order for LMR12010YMK/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR12010YMK/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 LMR12010YMK/NOPB reliable?
The price and inventory of LMR12010YMK/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR12010YMK/NOPB is usually 5 days.
3.What payment methods are accepted for LMR12010YMK/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR12010YMK/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR12010YMK/NOPB?
LMR12010YMK/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR12010YMK/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 LMR12010YMK/NOPB?
For technical support, including LMR12010YMK/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR12010YMK/NOPB requirements.
6.How does Aetrix verify that LMR12010YMK/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR12010YMK/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 LMR12010YMK/NOPB meets industry standards.
7.What is the process for return or replacement of LMR12010YMK/NOPB?
All LMR12010YMK/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR12010YMK/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 LMR12010YMK/NOPB part is unused and in its original packaging.
Return procedure for LMR12010YMK/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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