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Texas Instruments LMR10510XMFX/NOPB
- Part No.:
- LMR10510XMFX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10510XMFX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,438
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Product details
Overview
LMR10510XMFX/NOPB from Texas Instruments is a monolithic 1.6-MHz, 1-A synchronous step-down DC/DC regulator in a 5-pin SOT-23 package. It operates from 3 V to 5.5 V input, delivers 0.6 V to 4.5 V output, features 130-mΩ internal PMOS switch, 30 nA shutdown IQ, and internal compensation-designed for space-constrained point-of-load conversion in battery-powered instrumentation.
For engineers reviewing the LMR10510XMFX/NOPB datasheet, LMR10510XMFX/NOPB pinout, LMR10510XMFX/NOPB application, or LMR10510XMFX/NOPB equivalent, key selection criteria include verified 1.6-MHz switching frequency, confirmed 130-mΩ RDS(ON) in SOT-23, measured 0.600 V feedback reference, thermal shutdown at 165°C, and soft-start ramp time of ~600 µs.
Technical Context
The LMR10510XMFX/NOPB employs current-mode PWM control with an internal 1.6-MHz oscillator and 30 ns minimum on-time, enabling stable regulation down to 0.6 V output across its 3–5.5 V input range. Its internally compensated architecture eliminates external compensation components and supports fast transient response.
It integrates pulse-by-pulse current limiting (1.75 A typical), undervoltage lockout with 430 mV hysteresis (2.73 V turn-on, 2.3 V turn-off), and output overvoltage protection triggered at 15% above VFB. The 5-pin SOT-23 package uses a single VIN pin shared for both power and control circuitry, with dedicated SW, GND, FB, and EN terminals.
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 - set via external resistor divider; 0.600 V ±2% feedback reference enables precise low-voltage core supply |
| Max Output Current | 1 A - sustained delivery enabled by 130-mΩ internal PMOS switch in SOT-23 package |
| Switching Frequency | 1.6 MHz - fixed frequency allows compact 1–2.2 µH inductors and 22 µF ceramic output capacitors |
| Shutdown Quiescent Current | 30 nA - ultra-low leakage preserves battery life in always-on systems during standby |
| Feedback Reference Voltage | 0.600 V - accurate, temperature-stable reference used directly in resistor-divider calculation for VOUT |
| Thermal Shutdown Threshold | 165°C - protects device under overload or poor PCB thermal design; auto-recovery at ~150°C |
Pinout & Package
LMR10510XMFX/NOPB is housed in a 5-pin SOT-23 package (2.92 × 2.84 × 1.0 mm) with exposed pad not connected internally-requires PCB ground connection only for thermal relief, not electrical return.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: SW | Switch node | Connects to inductor and catch diode anode; carries high di/dt switching current-requires short, low-inductance layout |
| 2: GND | Signal and power ground | Primary return path for feedback network and internal circuits; place bottom feedback resistor adjacent to this pin |
| 3: FB | Feedback input | Senses output voltage via resistor divider; high-impedance (≤100 nA bias) node sensitive to noise coupling |
| 4: EN | Enable control | Active-high logic input; must be tied to VIN or controlled externally; floating prohibited per datasheet |
| 5: VIN | Input supply | Single input pin powering both control circuitry and internal PMOS switch; requires local 22 µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network-reduces BOM count and layout sensitivity |
| Internal soft-start | ~600 µs controlled VOUT ramp prevents inrush current and stabilizes upstream supplies |
| Pulse-by-pulse current limit | 1.75 A typical cycle-by-cycle protection prevents switch damage during short-circuit or overload |
| Current-mode PWM control | Provides inherent line and load transient immunity without external loop compensation |
| Output overvoltage protection | Shuts off switch when FB exceeds 15% above 0.6 V-prevents downstream IC damage during feedback fault |
Applications
| Point-of-Load Conversion | Battery-Powered Instruments |
|---|---|
Use Scenario: Regulating 3.3 V rail to 1.8 V for microcontroller core supply in compact industrial sensor node. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1 A at 1.8 V with 1.6-MHz switching to minimize passive size. Use Value: Enables use of 1.5 µH inductor and 22 µF X7R MLCC-reducing total solution area to < 25 mm². | Use Scenario: Powering handheld multimeter logic and display from two AA cells (2.4–3.2 V). IC Role / Device Role / Timing Role: Efficient buck converter maintaining regulated 3.3 V output across full battery discharge curve. Use Value: 30 nA shutdown IQ extends shelf life; 93% peak efficiency at 1 A preserves runtime. |
| Industrial Distributed Power | Power Meters |
Use Scenario: Local 5 V-to-3.3 V conversion for isolated communication interface (RS-485 transceiver) in DIN-rail PLC module. IC Role / Device Role / Timing Role: Compact, thermally robust DC/DC stage placed near isolated barrier with minimal trace length. Use Value: SOT-23 package with 118°C/W θJA supports operation up to +125°C ambient without heatsink. | Use Scenario: Supplying metrology ADC and real-time clock in ANSI C12.20-compliant electricity meter. IC Role / Device Role / Timing Role: Low-noise, stable 1.2 V supply derived from 3.3 V system rail using precision feedback divider. Use Value: 0.600 V ±2% VFB and <0.02%/V line regulation ensure <±1 mV output drift over input variation. |
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 switching, 96% peak efficiency, 1.2-A rating, 6-pin WQFN; requires external compensation | Higher frequency enables smaller passives but demands stricter layout; no internal soft-start | Select when board space is more constrained than design cycle time and external compensation is acceptable |
| LMR10515XMF/NOPB | Same SOT-23 package, 3-MHz variant (LMR10515), 150-mΩ RDS(ON), identical pinout and FB voltage | Higher switching frequency trades off conduction loss for reduced inductor size; lower efficiency at high load | Choose for applications prioritizing minimum inductance over full-load efficiency-e.g., intermittent 500-mA loads |
Compared with TPS62130ARGTR and LMR10515XMF/NOPB, the LMR10510XMFX/NOPB offers the lowest component count (no compensation required), best thermal performance in SOT-23 (118°C/W), and guaranteed soft-start-making it optimal for cost-sensitive, space-limited designs where rapid time-to-market and layout simplicity are critical.
Availability
LMR10510XMFX/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions, battery-powered instrumentation, and industrial distributed power applications requiring stable component supply, long-term lifecycle support, and TI-qualified production lots.
Supply support for LMR10510XMFX/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 delivering analog and embedded processing solutions, with over 90,000 products serving industrial, automotive, and personal electronics markets.
The LMR10510XMFX/NOPB belongs to TI's LMR series of integrated DC/DC regulators-engineered specifically for high-density, low-noise power delivery in space- and efficiency-critical portable and industrial systems.
FAQ
What is the exact switching frequency of the LMR10510XMFX/NOPB?
The LMR10510XMFX/NOPB has a fixed nominal switching frequency of 1.6 MHz, with a specified range of 1.2 MHz to 1.95 MHz over temperature and input voltage. This value is factory-trimmed and does not require external configuration-unlike the LMR10510Y or LMR10515 variants which operate at 3 MHz.
Does the LMR10510XMFX/NOPB require external compensation components?
No, the LMR10510XMFX/NOPB is fully internally compensated. Its control loop is optimized for stability with standard 22 µF ceramic output capacitors and typical 1–2.2 µH inductors-eliminating the need for external compensation resistors or capacitors and reducing design risk.
What is the maximum continuous output current supported by the LMR10510XMFX/NOPB?
The LMR10510XMFX/NOPB delivers up to 1 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Its 130-mΩ RDS(ON) in the SOT-23 package enables this rating while maintaining junction temperatures within safe limits at full load.
How does the enable (EN) pin function on the LMR10510XMFX/NOPB?
The EN pin on the LMR10510XMFX/NOPB is an active-high logic input that controls startup and shutdown. It must be pulled to VIN or a compatible logic-high voltage (≤ VIN + 0.3 V); floating is prohibited. The device enters ultra-low 30-nA shutdown mode when EN is pulled below 0.4 V (typical threshold).
Can the LMR10510XMFX/NOPB be used with ceramic output capacitors only?
Yes-the LMR10510XMFX/NOPB is explicitly designed for ceramic output capacitors. Its internal compensation and current-mode architecture ensure stability with ≥22 µF X7R or X5R MLCCs; tantalum or electrolytic capacitors are unnecessary and not recommended due to higher ESR and ESL effects.
LMR10510XMFX/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:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMR10510XMFX/NOPB FAQ
1.How can I place an order for LMR10510XMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10510XMFX/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 LMR10510XMFX/NOPB reliable?
The price and inventory of LMR10510XMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10510XMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10510XMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10510XMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10510XMFX/NOPB?
LMR10510XMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10510XMFX/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 LMR10510XMFX/NOPB?
For technical support, including LMR10510XMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10510XMFX/NOPB requirements.
6.How does Aetrix verify that LMR10510XMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10510XMFX/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 LMR10510XMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10510XMFX/NOPB?
All LMR10510XMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10510XMFX/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 LMR10510XMFX/NOPB part is unused and in its original packaging.
Return procedure for LMR10510XMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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