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Texas Instruments LMR12010XMK/NOPB
- Part No.:
- LMR12010XMK/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
LMR12010XMK/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,959
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Product details
Overview
LMR12010XMK/NOPB from Texas Instruments is a monolithic 1.6 MHz PWM step-down DC/DC regulator in a 6-pin SOT-23-THIN package, delivering up to 1 A output current with input voltage range 3 V to 20 V, output voltage range 0.8 V to 17 V, and typical quiescent current of 30 nA in shutdown - used for point-of-load conversion in space-constrained battery-powered instruments.
For engineers reviewing the LMR12010XMK/NOPB datasheet, LMR12010XMK/NOPB pinout, LMR12010XMK/NOPB application, or LMR12010XMK/NOPB equivalent, key selection criteria include verified 1.6 MHz fixed switching frequency, internal current-mode control with soft-start, thermal shutdown, undervoltage lockout (2.74 V rising threshold), and compatibility with ceramic output capacitors and small-signal Schottky catch diodes.
Technical Context
The LMR12010XMK/NOPB implements constant-frequency current-mode PWM control with an internally compensated error amplifier and 0.8 V reference. Its 1.6 MHz oscillator enables sub-microsecond on-times (as low as 13 ns), supporting high-efficiency regulation down to 0.8 V output across the full 3–20 V input range.
It integrates a 300 mΩ NMOS power switch, bootstrap gate-drive circuitry (requiring external BOOST capacitor), and protection features including cycle-by-cycle current limit (1.7 A typical), thermal shutdown (165°C trip), and output overvoltage protection (10% above VREF). The EN pin provides logic-level shutdown with 30 nA IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 20 V - supports direct regulation from common rails (3.3 V, 5 V, 12 V) without pre-regulation. |
| Output Voltage Range | 0.8 V to 17 V - set via external resistor divider on FB pin; minimum 0.8 V enables core voltage supply for modern MCUs. |
| Max Output Current | 1 A - delivered continuously with proper thermal layout; limited by internal 300 mΩ NMOS switch and thermal shutdown. |
| Switching Frequency | 1.6 MHz (fixed) - enables use of ≤4.7 µH inductors and low-ESR ceramic capacitors, minimizing solution footprint. |
| Feedback Reference | 0.800 V ±1.6% - high-accuracy bandgap reference ensures tight output regulation across temperature and line variations. |
| Shutdown Quiescent Current | 30 nA typical - preserves battery life in always-on or low-power sleep modes of portable equipment. |
| UVLO Threshold | 2.74 V (rising), 2.3 V (falling) - hysteresis prevents oscillation during brown-out; ensures reliable startup from weak sources. |
Pinout & Package
Package: SOT-23-THIN (6-pin), body size 2.90 mm × 1.60 mm × 1.00 mm - ultra-compact surface-mount package optimized for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - BOOST | Bootstrap gate-drive supply | Connects to SW via external capacitor; supplies >2.5 V above SW to fully enhance internal NMOS switch for low RDS(ON) operation. |
| 2 - GND | Signal and power ground | Common return for feedback network and internal regulators; place bottom feedback resistor adjacent to minimize noise coupling. |
| 3 - FB | Output voltage sense input | High-impedance node monitoring resistor divider; regulates output by comparing divided VOUT to 0.8 V reference. |
| 4 - EN | Enable/shutdown control | Logic-high (>1.8 V) enables regulation; floating or >VIN+0.3 V damages device; 30 nA shutdown IQ reduces system leakage. |
| 5 - VIN | Main input supply | Accepts 3–20 V; requires local 10 µF ceramic bypass capacitor near pin to suppress switching transients and stabilize input impedance. |
| 6 - SW | Power switch output | Drives external inductor and catch diode; swings between ~0 V (during off-time) and VIN−ILOAD×RDS(ON) (during on-time). |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation components - reduces BOM count and design iteration time for stable 1-A regulation. |
| Internal soft-start (200 µs ramp) | Prevents inrush current and output overshoot during power-up - avoids stress on downstream capacitors and load circuitry. |
| Pulse-by-pulse current limiting | Clamps peak switch current at 1.7 A typical - protects internal NMOS under short-circuit or overload without latch-off. |
| Thermal shutdown with hysteresis | Shuts down at 165°C junction temperature; resumes at ~150°C - prevents permanent damage during sustained overload or poor heatsinking. |
| Output overvoltage protection | Disables switch when FB exceeds 0.88 V (10% above VREF) - safeguards connected ICs from catastrophic overvoltage events. |
Applications
| Point-of-Load Conversion | Battery-Powered Instruments |
|---|---|
Use Scenario: Regulating 5 V or 12 V system rail to 1.8 V or 3.3 V for microcontroller core or I/O supply in compact handheld test equipment. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, low-noise DC output with fast transient response to dynamic MCU load steps. Use Value: Enables single-layer or 2-layer PCB designs using 4.7 µH inductors and 10–22 µF X5R ceramics - reducing total solution area to <25 mm². | Use Scenario: Powering portable gas analyzers or multimeters operating from two AA/AAA cells (2.4–3.2 V nominal) while maintaining 3.3 V output. IC Role / Device Role / Timing Role: High-efficiency step-up/step-down capable regulator (via adjustable VOUT) sustaining regulated output across full battery discharge curve. Use Value: 90% peak efficiency at 1 A and 3.3 V out from 5 V input extends runtime; 30 nA shutdown IQ preserves shelf life for infrequently used field devices. |
| Industrial Distributed Power | Power Meters |
Use Scenario: Local 3.3 V supply for isolated sensor interface modules mounted on DIN-rail-mounted PLC backplanes with 24 V bus. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC converter delivering clean 1 A output despite ambient temperatures up to +70°C and board-level EMI. Use Value: SOT-23-THIN package allows placement directly beside isolated ADCs or RS-485 transceivers - minimizing trace length and noise pickup. | Use Scenario: Providing stable 1.2 V and 3.3 V rails for metrology-grade ADCs, real-time clocks, and RF sub-GHz ISM-band communication in smart electricity meters. IC Role / Device Role / Timing Role: Primary regulator for precision analog front-end and low-power wireless SoC, requiring low ripple and strict start-up sequencing. Use Value: Internal soft-start and 0.8 V reference ensure monotonic, jitter-free power-up of time-critical metrology circuits without external sequencing ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR12008XMK/NOPB | Lower 0.8 A max output current; identical 1.6 MHz frequency and SOT-23-THIN package. | Suitable only for sub-800 mA loads; same PCB footprint but reduced thermal margin at full load. | Select when 1 A capability is unnecessary - reduces cost and simplifies thermal design. |
| TPS62231DRVR | 3 MHz switching frequency; 0.6 V reference; 0.8 A rating; 6-pin WSON package (2.0 × 2.0 mm). | Requires larger inductor (2.2 µH) and different layout; higher frequency trades efficiency for smaller passive size. | Choose for ultra-compact designs where 3 MHz enables <15 mm² total solution size - verify thermal performance at 800 mA. |
Compared with LMR12010XMK/NOPB, LMR12008XMK/NOPB offers identical form-factor and frequency but lower current capability, while TPS62231DRVR delivers higher integration density at the expense of reduced output current and different thermal profile - making LMR12010XMK/NOPB optimal for 1 A, 1.6 MHz, space-constrained industrial loads.
Availability
LMR12010XMK/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-term lifecycle support, and consistent parametric performance.
Supply support for LMR12010XMK/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 broad industrial and automotive reach.
The LMR12010XMK/NOPB belongs to TI's LMR series of high-frequency monolithic buck regulators, designed specifically for space-constrained, high-efficiency DC/DC conversion in portable, industrial, and metering applications where minimal external components and proven reliability are critical.
FAQ
What is the exact switching frequency of the LMR12010XMK/NOPB?
The LMR12010XMK/NOPB has a fixed internal switching frequency of 1.6 MHz, with typical variation of ±25% over temperature and input voltage. This value is factory-trimmed and does not require external timing components - enabling predictable EMI behavior and consistent inductor sizing across production units.
Can the LMR12010XMK/NOPB operate with an input voltage below 3 V?
No - the LMR12010XMK/NOPB has a guaranteed minimum operating input voltage of 3 V per datasheet specifications. Undervoltage lockout activates below 2.74 V (rising threshold), and operation below 3 V is outside recommended conditions. For sub-3 V inputs, consider TI's TPS6208x or similar low-VIN buck regulators.
Does the LMR12010XMK/NOPB require an external catch diode?
Yes - the LMR12010XMK/NOPB uses a non-synchronous buck topology and requires an external Schottky diode (e.g., D1 in typical application schematics) connected between SW and GND. A low-forward-voltage, fast-recovery Schottky such as the RB050M-30 (0.45 V @ 1 A) is recommended to maximize efficiency and thermal performance.
How is output voltage set on the LMR12010XMK/NOPB?
Output voltage is set using a two-resistor feedback divider connected between VOUT, FB, and GND. With a precise 0.800 V internal reference, VOUT = 0.8 × (1 + R1/R2). Standard 1% resistors (e.g., R1 = 100 kΩ, R2 = 20 kΩ for 4.8 V) yield ±1.5% total output tolerance, including reference drift and resistor tolerance.
Is the LMR12010XMK/NOPB RoHS-compliant and lead-free?
Yes - the LMR12010XMK/NOPB is RoHS-compliant and lead-free, as indicated by the "/NOPB" suffix in the part number per Texas Instruments' packaging nomenclature. It meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) and is compatible with standard Pb-free reflow profiles.
LMR12010XMK/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:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
LMR12010XMK/NOPB FAQ
1.How can I place an order for LMR12010XMK/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR12010XMK/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 LMR12010XMK/NOPB reliable?
The price and inventory of LMR12010XMK/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR12010XMK/NOPB is usually 5 days.
3.What payment methods are accepted for LMR12010XMK/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR12010XMK/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR12010XMK/NOPB?
LMR12010XMK/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR12010XMK/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 LMR12010XMK/NOPB?
For technical support, including LMR12010XMK/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR12010XMK/NOPB requirements.
6.How does Aetrix verify that LMR12010XMK/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR12010XMK/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 LMR12010XMK/NOPB meets industry standards.
7.What is the process for return or replacement of LMR12010XMK/NOPB?
All LMR12010XMK/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR12010XMK/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 LMR12010XMK/NOPB part is unused and in its original packaging.
Return procedure for LMR12010XMK/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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