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Texas Instruments LMR10510YMF/NOPB
- Part No.:
- LMR10510YMF/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10510YMF/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:919
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Product details
Overview
LMR10510YMF/NOPB from Texas Instruments is a monolithic 3-MHz PWM step-down DC/DC regulator IC delivering up to 1 A output current with 0.6 V to 4.5 V adjustable output voltage, operating from 3 V to 5.5 V input, and featuring 30 nA shutdown IQ, internal soft-start, and current-mode control - deployed in space-constrained point-of-load systems such as portable instrumentation and power meters.
For engineers reviewing the LMR10510YMF/NOPB datasheet, LMR10510YMF/NOPB pinout, LMR10510YMF/NOPB application, or LMR10510YMF/NOPB equivalent, key selection criteria include verified 3-MHz switching frequency, WSON-6 package thermal performance (θJA = 80°C/W), 0.600 V feedback reference tolerance (±2%), 1.75 A typical current limit, and confirmed compatibility with ceramic output capacitors for low-ESR transient response.
Technical Context
The LMR10510YMF/NOPB implements constant-frequency current-mode PWM control with an internal 130–150 mΩ PMOS switch, enabling precise duty-cycle adjustment down to 30 ns minimum on-time across its full 3–5.5 V input range. Its internally compensated architecture eliminates external compensation components while maintaining stability with 22 µF ceramic output capacitance.
It integrates undervoltage lockout (2.73 V rising threshold, 430 mV hysteresis), cycle-by-cycle current limiting (1.2–1.75 A), thermal shutdown (165°C trip), and output overvoltage protection (15% above 0.6 V reference), all within a 3.0 × 3.0 × 0.8 mm WSON package with exposed thermal pad (DAP) tied to system ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 5.5 V - supports direct regulation from standard 3.3 V and 5 V rails without pre-regulation. |
| Output Voltage Range | 0.6 V to 4.5 V - programmable via external resistor divider; 0.600 V ±2% reference enables tight output tolerance. |
| Max Output Current | 1 A - sustained delivery enabled by internal 150 mΩ (WSON) PMOS switch and thermal design. |
| Switching Frequency | 3 MHz (LMR10510Y variant) - allows use of sub-1 µH inductors and 22 µF ceramic capacitors, minimizing solution footprint. |
| Shutdown Quiescent Current | 30 nA typical - extends battery life in always-on or low-power sleep modes. |
| Feedback Reference Voltage | 0.600 V ±12 mV - sets output accuracy; line regulation ≤0.02%/V ensures stability across input variation. |
| Current Limit Threshold | 1.2 A min / 1.75 A typ - protects switch and inductor during overload or short-circuit events. |
Pinout & Package
LMR10510YMF/NOPB uses the 6-pin WSON (NGG) package (3.0 mm × 3.0 mm × 0.8 mm) with exposed die attach pad (DAP) for thermal dissipation. DAP must be soldered to PCB ground plane but is not a primary signal ground path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback input | Connects to resistor divider midpoint; regulates output by comparing to 0.6 V internal reference. |
| GND | Signal and power ground | Reference for FB, EN, and internal circuitry; place bottom feedback resistor adjacent to this pin. |
| SW | Switch node | Drives external inductor and catch diode; swings between VIN and −VD during operation. |
| VIND | Power input supply | Primary input voltage connection for internal PMOS switch; decoupled with 22 µF ceramic capacitor. |
| VINA | Control circuitry supply | Bias rail for internal logic and error amplifier; must be connected directly to VIND on PCB. |
| EN | Enable control input | Logic-high (>1.8 V) enables regulation; floating or >VINA+0.3 V may cause malfunction. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| 3-MHz fixed-frequency PWM | Enables <1 µH inductors and compact 22 µF ceramic output caps - cuts total solution area by >40% vs. 1-MHz alternatives. |
| Internal soft-start (600 µs) | Controls VOUT ramp rate to limit inrush current into downstream capacitance and prevent input rail droop. |
| Output overvoltage protection | Disables switch if FB exceeds 0.69 V (15% above 0.6 V) - prevents damage to load during feedback divider fault. |
| Thermal shutdown (165°C) | Halts switching until junction cools to ~150°C - protects device under sustained overload or poor heatsinking. |
Applications
| Point-of-Load Regulation | Battery-Powered Instruments |
|---|---|
Use Scenario: Converting 5 V system rail to 1.8 V or 3.3 V for microcontroller core or I/O domains in compact industrial sensors. IC Role / Device Role / Timing Role: Primary buck regulator providing stable, low-noise local power with fast transient response to digital load steps. Use Value: 3-MHz operation minimizes inductor size and output ripple, enabling integration into 10 mm² PCB footprints. | Use Scenario: Powering handheld multimeters, gas detectors, or portable data loggers with single-cell Li-ion or dual-cell alkaline inputs. IC Role / Device Role / Timing Role: Main DC/DC converter managing battery-to-load efficiency across wide input range (3–5.5 V) and load current (10 mA–1 A). Use Value: 30 nA shutdown IQ preserves battery capacity during standby; internal soft-start avoids startup surge in sensitive analog front-ends. |
| Power Meters | Industrial Distributed Power |
Use Scenario: Supplying isolated ADC, metrology SoC, and communication interfaces (RS-485, NB-IoT) in smart electricity meters. IC Role / Device Role / Timing Role: High-reliability buck regulator meeting IEC 62053-21 requirements for long-term stability and thermal robustness. Use Value: 125°C max junction rating and 80°C/W θJA support operation in sealed enclosures; ±2% VFB ensures accurate energy measurement calibration. | Use Scenario: Local regulation at remote sensor nodes or actuator modules fed from centralized 5 V backplane. IC Role / Device Role / Timing Role: Compact, self-contained step-down stage replacing discrete FET+controller solutions in modular PLC I/O designs. Use Value: WSON-6 package with DAP enables conduction cooling onto metal chassis; no external compensation simplifies certification for EMC 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 |
|---|---|---|---|
| TPS62130ARGTR | 3-MHz synchronous buck; 0.6 V reference; 3.6 V–17 V input; 3 A output; QFN-16 package (3 × 3 mm) | Higher input voltage range and output current; requires external compensation and more board area | Choose when input exceeds 5.5 V or >1 A load is needed; not drop-in due to different pinout and control scheme. |
| MP2143GJ-Z | 3-MHz synchronous buck; 0.6 V reference; 2.5 V–6 V input; 3 A output; TSOT23-8 package | Higher current capability; integrated high-side/low-side MOSFETs; no external diode required | Prefer for higher-current, cost-sensitive designs where footprint increase is acceptable; differs in enable polarity and soft-start timing. |
Compared with TPS62130ARGTR and MP2143GJ-Z, the LMR10510YMF/NOPB offers the smallest solution size for 1-A loads at 3–5.5 V input, with zero external compensation and lowest shutdown IQ - making it optimal for ultra-compact, battery-conscious applications where 1 A output suffices.
Availability
LMR10510YMF/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions from 3.3-V- and 5-V rails, space-constrained portable instruments, and industrial distributed power applications requiring stable component supply across multi-year production cycles.
Supply support for LMR10510YMF/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 over 50 years of innovation in high-reliability power conversion ICs.
The LMR10510 belongs to TI's high-frequency monolithic buck regulator product line, designed specifically for miniaturized, high-efficiency DC/DC conversion in portable, industrial, and metering applications where board space and quiescent power are critical constraints.
FAQ
What is the switching frequency of the LMR10510YMF/NOPB?
The LMR10510YMF/NOPB operates at a fixed 3-MHz switching frequency, as designated by the "Y" suffix in its part number. This high frequency enables use of small inductors (<1 µH) and ceramic capacitors (22 µF), reducing overall solution size. Measured frequency remains within 2.25–3.75 MHz across temperature and input voltage per datasheet Section 7.3.
Does the LMR10510YMF/NOPB require external compensation components?
No, the LMR10510YMF/NOPB is internally compensated. Its control loop is optimized for stability with standard 22 µF ceramic output capacitance and typical PCB layout - eliminating external compensation resistors and capacitors, simplifying design, and improving production consistency.
What package type does the LMR10510YMF/NOPB use, and how is thermal management handled?
The LMR10510YMF/NOPB uses the 6-pin WSON (NGG) package (3.0 mm × 3.0 mm × 0.8 mm) with an exposed die attach pad (DAP). Thermal management requires soldering the DAP to a dedicated PCB copper pour connected to system ground - achieving θJA = 80°C/W in still air per datasheet Section 7.3.
Can the LMR10510YMF/NOPB operate with input voltage below 3 V?
No - the LMR10510YMF/NOPB has a recommended operating input range of 3 V to 5.5 V, with undervoltage lockout (UVLO) disabling operation below 2.73 V (typical rising threshold). Operation below 3 V risks instability, reduced output current, or failure to regulate; it is not characterized or guaranteed outside the specified range.
How is output voltage set on the LMR10510YMF/NOPB?
Output voltage is set using a resistor divider between VOUT and GND, with the FB pin connected to the divider midpoint. The formula is VOUT = 0.6 V × (1 + R1/R2); a common choice is R2 = 10 kΩ, yielding R1 = 46.7 kΩ for 3.3 V output. The 0.600 V reference has ±2% tolerance, directly determining output accuracy.
LMR10510YMF/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- SC-74A, SOT-753
- 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.5V
- 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-23-5
LMR10510YMF/NOPB FAQ
1.How can I place an order for LMR10510YMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10510YMF/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 LMR10510YMF/NOPB reliable?
The price and inventory of LMR10510YMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10510YMF/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10510YMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10510YMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10510YMF/NOPB?
LMR10510YMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10510YMF/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 LMR10510YMF/NOPB?
For technical support, including LMR10510YMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10510YMF/NOPB requirements.
6.How does Aetrix verify that LMR10510YMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10510YMF/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 LMR10510YMF/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10510YMF/NOPB?
All LMR10510YMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10510YMF/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 LMR10510YMF/NOPB part is unused and in its original packaging.
Return procedure for LMR10510YMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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