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Texas Instruments LMR10510XMF/NOPB
- Part No.:
- LMR10510XMF/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10510XMF/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,247
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Product details
Overview
LMR10510XMF/NOPB from Texas Instruments is a monolithic 1.6-MHz PWM step-down DC/DC regulator IC delivering up to 1 A output current from 3 V–5.5 V input, with 0.6 V–4.5 V adjustable output voltage, internal PMOS switch (130 mΩ in SOT-23), and integrated soft-start. It targets space-constrained point-of-load conversion in battery-powered instrumentation and industrial distributed power systems.
For engineers reviewing the LMR10510XMF/NOPB datasheet, LMR10510XMF/NOPB pinout, LMR10510XMF/NOPB application, or LMR10510XMF/NOPB equivalent, key selection criteria include verified 1.6-MHz switching frequency, confirmed 30 nA shutdown IQ, validated 0.600 V feedback reference, documented thermal shutdown at 165°C, and package-specific RDS(ON) (130 mΩ SOT-23 / 150 mΩ WSON).
Technical Context
The LMR10510XMF/NOPB implements current-mode PWM control with internal compensation and a fixed 1.6-MHz oscillator, enabling stable regulation with minimal external components. Its 30 ns minimum on-time supports low-duty-cycle operation down to 0.6 V output across the full 3 V–5.5 V input range.
Functional block integration includes undervoltage lockout (2.73 V rising threshold, 430 mV hysteresis), cycle-by-cycle current limiting (1.75 A typical), output overvoltage protection (15% above VFB), and thermal shutdown (165°C trip, ~150°C recovery). The internal 130-mΩ PMOS switch and 0.6 V reference enable high power density in SOT-23 packaging.
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 ±12 mV feedback reference enables precise low-voltage core supply generation. |
| Max Output Current | 1 A - sustained delivery enabled by internal 130-mΩ PMOS switch and thermal design (θJA = 118°C/W in SOT-23). |
| Switching Frequency | 1.6 MHz - allows use of compact 1–2.2 µH inductors and 22 µF ceramic capacitors, minimizing solution footprint. |
| Shutdown Quiescent Current | 30 nA typical - enables ultra-low-power standby in battery-critical applications such as portable meters and handheld instruments. |
| Feedback Voltage | 0.600 V ±12 mV - tight tolerance ensures accurate output regulation across temperature (−40°C to +125°C). |
| Thermal Shutdown | 165°C - protects device under overload or poor PCB thermal layout; auto-recovery at ~150°C prevents latch-up. |
Pinout & Package
SOT-23-5 package (2.92 mm × 2.84 mm × 1.0 mm) with exposed pad not electrically connected; requires soldered thermal pad to PCB ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node | Connects to inductor and catch diode anode; carries high di/dt switching current - must be routed short and wide to minimize EMI and voltage spikes. |
| GND | Signal and power ground | Primary return path for feedback network and internal circuitry; bottom resistor of FB divider must connect here to avoid ground bounce errors. |
| FB | Feedback input | Monitors output voltage via resistor divider; 0.1–100 nA bias current enables high-impedance dividers without significant error. |
| EN | Enable control | Logic-high active; 0.4 V threshold ensures compatibility with 1.8 V/3.3 V GPIO; floating state disables regulator - must be pulled high or low externally. |
| VIN | Input supply | Power input for both control circuitry and internal PMOS switch; requires local 22 µF ceramic capacitor with low ESL placed near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while maintaining stability across 0.6–4.5 V output range. |
| Internal soft-start | 600 µs controlled VOUT ramp prevents inrush current into downstream capacitance - critical for hot-swap and multi-rail sequencing. |
| Pulse-by-pulse current limit | 1.75 A typical switch current limit per cycle - provides robust short-circuit protection without latch-up, enabling safe operation into heavy transient loads. |
| Low 30 nA shutdown IQ | Enables >1-year battery life in always-on metering applications with periodic wake-up; no external disable FET required. |
| Thermal shutdown with hysteresis | 165°C trip / ~150°C recovery - prevents thermal runaway during sustained overload while avoiding oscillation near thermal limit. |
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 buck regulator providing tightly regulated, low-noise 1.8 V at up to 1 A with fast transient response. Use Value: 1.6-MHz switching enables <10 mm² total solution size; 0.6 V reference ensures accuracy for low-voltage logic domains. | Use Scenario: Powering LCD display and data acquisition circuitry in handheld multimeter with AA battery input. IC Role / Device Role / Timing Role: Main DC/DC converter stepping 3 V battery voltage to stable 3.3 V system rail. Use Value: 30 nA shutdown IQ extends battery life beyond 500 hours in sleep mode; SOT-23 footprint minimizes PCB area. |
| Industrial Power Meters | Space-Constrained Embedded Systems |
Use Scenario: Generating isolated auxiliary 5 V and 3.3 V rails from 24 V bus in DIN-rail mounted energy meter. IC Role / Device Role / Timing Role: Secondary buck stage converting locally derived 5 V intermediate rail to precision 3.3 V analog supply. Use Value: −40°C to +125°C operating range ensures reliability in unventilated enclosures; 0.600 V ±12 mV VFB supports metrology-grade voltage accuracy. | Use Scenario: Supplying FPGA I/O bank requiring 1.8 V from shared 3.3 V backplane in compact edge AI module. IC Role / Device Role / Timing Role: Dedicated point-of-load regulator placed adjacent to FPGA ball grid for lowest possible impedance path. Use Value: 130 mΩ RDS(ON) and 1.6 MHz frequency reduce output ripple and improve transient response to dynamic I/O switching currents. |
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, 2-A output, 0.6-V reference, but requires external compensation and has higher 17-µA quiescent current in regulation. | Better suited for higher-current, higher-frequency designs where board space permits added compensation components. | Select when >1 A load or faster transient response is required; avoid if ultra-low IQ or minimal BOM count is critical. |
| LMR10510YMF/NOPB | Identical architecture and pinout, but factory-set to 3-MHz switching frequency and higher 4.3–6.5 mA operating IQ. | Optimized for smallest possible inductor/capacitor size where efficiency at light loads is secondary to footprint reduction. | Choose for ultra-compact layouts needing <1 µH inductors; confirm thermal budget accommodates higher operating IQ. |
Compared with TPS62130ARGTR and LMR10510YMF/NOPB, the LMR10510XMF/NOPB uniquely balances 1.6-MHz operation, 1-A capability, 30-nA shutdown IQ, and internal compensation - making it optimal for cost-sensitive, space-constrained, battery-aware designs requiring rapid time-to-market with minimal design iteration.
Availability
LMR10510XMF/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions from 3.3-V- and 5-V rails, battery-powered equipment, and industrial distributed power applications requiring stable component supply and long-term production continuity.
Supply support for LMR10510XMF/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 specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.
The LMR10510 product line delivers high-frequency, internally compensated buck regulators targeting space- and power-constrained applications - designed specifically to simplify point-of-load design while maintaining high efficiency and thermal robustness.
FAQ
What is the switching frequency of the LMR10510XMF/NOPB?
The LMR10510XMF/NOPB operates at a fixed 1.6 MHz switching frequency, as confirmed in the TI SNVS727C datasheet Section 7.3 (FSW = 1.2–1.95 MHz, typical 1.6 MHz). This frequency enables use of small 1–2.2 µH inductors and 22 µF ceramic capacitors, reducing overall solution size. The 'X' suffix explicitly denotes the 1.6-MHz variant, distinguishing it from the 3-MHz 'Y' version.
Does the LMR10510XMF/NOPB require external compensation components?
No, the LMR10510XMF/NOPB is internally compensated, as stated in the Features section and Section 3 Description of the TI datasheet. This eliminates the need for external compensation networks (e.g., RC networks across error amplifier), simplifying design, reducing BOM count, and improving layout robustness - especially critical for high-frequency buck converters operating at 1.6 MHz.
What is the maximum output current capability of the LMR10510XMF/NOPB?
The LMR10510XMF/NOPB delivers up to 1 A of continuous output current, supported by its internal 130-mΩ PMOS switch (SOT-23 package) and thermal design (θJA = 118°C/W). The datasheet specifies a typical current limit of 1.75 A with a minimum of 1.2 A across temperature, ensuring reliable operation under transient loads while maintaining regulation at full 1-A steady-state output.
What is the feedback reference voltage (VFB) of the LMR10510XMF/NOPB?
The LMR10510XMF/NOPB has a nominal feedback reference voltage of 0.600 V, with a min/max specification of 0.588 V to 0.612 V at 25°C (Section 7.3 Electrical Characteristics). This tight tolerance enables accurate output voltage setting across temperature (−40°C to +125°C), supporting precision applications like sensor signal chains and metrology-grade power supplies.
How does the enable (EN) pin function on the LMR10510XMF/NOPB?
The EN pin on the LMR10510XMF/NOPB is a logic-high active enable input with a typical threshold of 1.8 V and a guaranteed shutdown threshold below 0.4 V (Section 7.3). It must not be left floating - TI recommends tying it directly to VIN for always-on operation or to a GPIO for controlled startup. Exceeding VIN + 0.3 V on this pin risks damage, per Pin Descriptions in Section 6.
LMR10510XMF/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
LMR10510XMF/NOPB FAQ
1.How can I place an order for LMR10510XMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10510XMF/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 LMR10510XMF/NOPB reliable?
The price and inventory of LMR10510XMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10510XMF/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10510XMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10510XMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10510XMF/NOPB?
LMR10510XMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10510XMF/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 LMR10510XMF/NOPB?
For technical support, including LMR10510XMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10510XMF/NOPB requirements.
6.How does Aetrix verify that LMR10510XMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10510XMF/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 LMR10510XMF/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10510XMF/NOPB?
All LMR10510XMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10510XMF/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 LMR10510XMF/NOPB part is unused and in its original packaging.
Return procedure for LMR10510XMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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