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Texas Instruments LMR10510YMFX/NOPB
- Part No.:
- LMR10510YMFX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10510YMFX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,058
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Product details
Overview
LMR10510YMFX/NOPB from Texas Instruments is a 3-MHz, 1-A synchronous step-down DC/DC regulator in WSON-6 package, delivering 0.6–4.5 V output from 3–5.5 V input with 30 nA shutdown current, internal compensation, and current-mode PWM control. It serves as a compact point-of-load power supply in space-constrained industrial and portable systems.
For engineers reviewing the LMR10510YMFX/NOPB datasheet, LMR10510YMFX/NOPB pinout, LMR10510YMFX/NOPB application, or LMR10510YMFX/NOPB equivalent, key selection factors include its 3-MHz switching frequency enabling ultra-small passive components, 130–150 mΩ internal PMOS RDS(ON), thermal shutdown at 165°C, ±2% feedback voltage accuracy, and support for 1-A continuous load with cycle-by-cycle current limiting.
Technical Context
The LMR10510YMFX/NOPB implements fixed-frequency current-mode PWM control with an internal 3-MHz oscillator, enabling sub-30 ns minimum on-time for high VIN-to-VOUT conversion ratios down to 0.6 V. Its integrated 130 mΩ (SOT-23) / 150 mΩ (WSON) PMOS switch and internal soft-start (600 µs ramp) ensure stable startup without external compensation.
It features undervoltage lockout (UVLO) with 2.73 V turn-on and 430 mV hysteresis, output overvoltage protection triggered at FB = 1.15 × VREF, and pulse-by-pulse current limiting set at 1.2–1.75 A. Thermal shutdown activates at 165°C and recovers at ~150°C, while junction-to-ambient thermal resistance is 80°C/W in WSON package.
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; enables core logic, I/O, and analog supply generation. |
| Max Output Current | 1 A continuous - sufficient for FPGA I/O banks, microcontroller cores, and sensor signal chains. |
| Switching Frequency | 3 MHz (LMR10510Y variant) - allows use of ≤1 µH inductors and 22 µF ceramic capacitors, minimizing solution footprint. |
| Feedback Voltage | 0.600 V ±2% - sets output accuracy; enables precise low-voltage regulation critical for modern SoCs. |
| Shutdown Quiescent Current | 30 nA typical - extends battery life in always-on or sleep-mode applications such as IoT endpoints. |
| RDS(ON) (WSON) | 150 mΩ - limits conduction loss to ~150 mW at 1 A, supporting >90% efficiency at mid-load. |
| Thermal Shutdown | 165°C activation - protects against sustained overload or poor PCB thermal design without requiring external monitoring. |
Pinout & Package
LMR10510YMFX/NOPB is packaged in a thermally enhanced 6-pin WSON (3.0 mm × 3.0 mm × 0.8 mm) with exposed die attach pad (DAP) for improved heat dissipation. The DAP must be connected to system ground for optimal thermal performance but is not a primary current-carrying GND path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback input | Senses output voltage via resistor divider; regulates VOUT to 0.6 V reference with ±2% tolerance. |
| GND | Signal and power ground | Reference node for feedback network and internal circuitry; place bottom resistor of divider adjacent to this pin. |
| SW | Switch node | Connects to inductor and catch diode; carries high dv/dt switching waveform; requires tight layout to minimize EMI. |
| VIND | Power input supply | Primary input rail connection; supplies energy to internal PMOS switch and output stage. |
| VINA | Control circuitry supply | Bias supply for internal logic and error amplifier; must be tied to VIND on PCB for proper operation. |
| EN | Enable control input | Logic-high active enable; threshold is 1.8 V; floating or overvoltage (>VINA + 0.3 V) must be avoided. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting and fast transient response to load steps. |
| Internal soft-start (600 µs) | Prevents inrush current during power-up, protecting input capacitors and upstream regulators. |
| Output overvoltage protection | Shuts off PMOS switch if FB exceeds 1.15 × 0.6 V - safeguards downstream ICs from overvoltage damage. |
| Ultra-low shutdown IQ (30 nA) | Enables true "off" state in battery-powered devices, extending shelf life and standby duration. |
| Thermal shutdown with hysteresis | Turns off regulator at 165°C and resumes at ~150°C - prevents thermal runaway while allowing safe recovery. |
Applications
| Industrial Power Meters | Portable Hand-Held Instruments |
|---|---|
Use Scenario: Compact, isolated power supply for metrology-grade ADCs and real-time MCU in DIN-rail mounted energy meters. IC Role / Device Role / Timing Role: Primary buck regulator converting 5 V system rail to 1.8 V for precision analog front-end and 3.3 V for ARM Cortex-M4 core. Use Value: 3-MHz operation enables <10 mm² total solution size; 0.6 V feedback reference ensures ±1% output accuracy across temperature. | Use Scenario: Battery-powered handheld multimeter with LCD, Bluetooth LE, and dual ADC channels. IC Role / Device Role / Timing Role: Point-of-load regulator supplying 1.2 V to RF transceiver and 3.3 V to microcontroller from single-cell Li-ion (3.0–4.2 V). Use Value: 30 nA shutdown current extends battery runtime beyond 1 year in sleep mode; WSON package fits tight 8 mm × 8 mm PCB area. |
| Space-Constrained IoT Nodes | Distributed Industrial Sensors |
Use Scenario: Sub-10 mm³ wireless sensor node with MEMS accelerometer, BLE SoC, and EEPROM. IC Role / Device Role / Timing Role: Single-chip 1-A buck converter powering entire system from coin cell or energy harvester output. Use Value: Internal compensation and 3-MHz switching allow full power delivery using only two 0603 capacitors and one 0805 inductor. | Use Scenario: Field-deployed temperature/humidity transmitter with 4–20 mA loop and local digital processing. IC Role / Device Role / Timing Role: Local 3.3 V supply derived from 24 V loop-powered input, operating across −40°C to +85°C ambient. Use Value: −40°C to +125°C junction rating and 80°C/W θJA ensure reliable operation in unventilated enclosures; UVLO hysteresis prevents brownout oscillation. |
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, 3-A buck with 0.6 V reference; higher current rating, larger 16-pin QFN package (3 × 3 mm). | Supports higher load currents and includes power-good flag; less suitable for strict 1-A, minimal-footprint designs. | Select when future-proofing for >1 A loads or requiring PG signal; avoid if board area is constrained to WSON-6 footprint. |
| MP2143GJ-Z | 3-MHz, 1-A buck with 0.8 V reference; 8-pin TSOT23 package; no internal soft-start or OVP. | Lacks output overvoltage protection and fixed soft-start; requires external soft-start capacitor for controlled ramp. | Choose for cost-sensitive, non-safety-critical applications where OVP and precise startup timing are not required. |
Compared with TPS62130ARGTR and MP2143GJ-Z, the LMR10510YMFX/NOPB delivers optimal balance of 1-A capability, ultra-compact WSON-6 footprint, integrated OVP/soft-start, and 30 nA shutdown-making it ideal for space- and battery-life-constrained industrial and portable designs where reliability and minimal external components are prioritized.
Availability
LMR10510YMFX/NOPB is available at Aetrix Electronics and suitable for industrial power meters, portable hand-held instruments, space-constrained IoT nodes, distributed industrial sensors, and battery-powered equipment requiring stable component supply and long-term manufacturability.
Supply support for LMR10510YMFX/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-efficiency DC/DC conversion.
The LMR10510YMFX/NOPB belongs to TI's LMR monolithic buck regulator family, designed specifically for space- and efficiency-critical point-of-load applications in industrial, portable, and metering systems where small solution size and robust protection features are essential.
FAQ
What is the switching frequency of the LMR10510YMFX/NOPB?
The LMR10510YMFX/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 inductors (≤1 µH) and ceramic capacitors (22 µF), significantly reducing total solution size compared to lower-frequency alternatives. The 3-MHz clock is internally generated and does not require external timing components.
Does the LMR10510YMFX/NOPB require external compensation components?
No, the LMR10510YMFX/NOPB is internally compensated. Its control loop is factory-tuned to remain stable with standard 22 µF ceramic output capacitors and typical PCB layouts. This eliminates the need for external compensation networks (e.g., RC networks across error amplifier), simplifying design, reducing BOM count, and improving consistency across production units.
What is the purpose of the separate VINA and VIND pins on the LMR10510YMFX/NOPB?
The LMR10510YMFX/NOPB uses separate VINA (control circuitry supply) and VIND (power switch supply) pins to isolate noise-sensitive analog circuitry from high-current switching paths. VINA powers the error amplifier, reference, and logic; it must be connected directly to VIND on the PCB to ensure proper biasing while maintaining noise immunity. This separation improves regulation accuracy and transient response under dynamic load conditions.
Can the LMR10510YMFX/NOPB operate with an input voltage below 3 V?
No-the LMR10510YMFX/NOPB has a recommended minimum input voltage of 3 V and an undervoltage lockout (UVLO) turn-on threshold of 2.73 V (typical). Operation below 3 V is outside the specified operating range and may result in unstable regulation, reduced efficiency, or failure to start. For sub-3 V inputs, consider TI's TPS62840 or similar nano-power buck regulators.
How does the LMR10510YMFX/NOPB protect against overtemperature conditions?
The LMR10510YMFX/NOPB incorporates thermal shutdown that disables the internal PMOS switch when junction temperature exceeds 165°C. Once triggered, the device remains off until the junction cools to approximately 150°C, at which point normal operation resumes. This hysteresis prevents rapid on-off cycling and provides robust protection during sustained overload or inadequate heatsinking.
LMR10510YMFX/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
LMR10510YMFX/NOPB FAQ
1.How can I place an order for LMR10510YMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10510YMFX/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 LMR10510YMFX/NOPB reliable?
The price and inventory of LMR10510YMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10510YMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10510YMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10510YMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10510YMFX/NOPB?
LMR10510YMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10510YMFX/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 LMR10510YMFX/NOPB?
For technical support, including LMR10510YMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10510YMFX/NOPB requirements.
6.How does Aetrix verify that LMR10510YMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10510YMFX/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 LMR10510YMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10510YMFX/NOPB?
All LMR10510YMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10510YMFX/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 LMR10510YMFX/NOPB part is unused and in its original packaging.
Return procedure for LMR10510YMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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