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Texas Instruments LMR10515XMF/NOPB
- Part No.:
- LMR10515XMF/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10515XMF/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,511
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Product details
Overview
LMR10515XMF/NOPB from Texas Instruments is a monolithic 1.6-MHz, 1.5-A synchronous step-down DC/DC regulator in a 5-pin SOT-23 package, delivering 0.6 V to 4.5 V output from 3 V–5.5 V input with internal PMOS switch (130 mΩ), 0.6 V feedback reference, and 30 nA shutdown current - used in space-constrained point-of-load conversions for portable instruments and power meters.
For engineers reviewing the LMR10515XMF/NOPB datasheet, LMR10515XMF/NOPB pinout, LMR10515XMF/NOPB application, or LMR10515XMF/NOPB equivalent, key selection criteria include verified 1.6-MHz fixed switching frequency, confirmed 1.5-A continuous output capability, validated thermal shutdown at 165°C, and documented internal compensation eliminating external compensation components.
Technical Context
The LMR10515XMF/NOPB employs current-mode PWM control with an internally generated 1.6-MHz oscillator and artificial ramp compensation, enabling stable regulation across 3 V–5.5 V input and 0.6 V–4.5 V output ranges. Its integrated 130-mΩ PMOS switch and pulse-by-pulse current limiting (1.8 A min / 2.5 A typ) support fast transient response without external sense resistors.
Internal soft-start ramps the 0.6 V reference over ~600 µs to limit inrush current, while undervoltage lockout (UVLO) activates at 2.73 V (rising) with 430 mV hysteresis. Output overvoltage protection triggers when FB exceeds 15% above VREF, disabling the switch to protect downstream circuitry.
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 Current | 1.5 A continuous - delivers full rated load with thermal margin up to +125°C junction temperature. |
| Switching Frequency | 1.6 MHz (fixed) - enables use of sub-2.2-µH inductors and compact ceramic capacitors for minimal PCB footprint. |
| Feedback Reference | 0.600 V ±12 mV - sets output voltage via external resistor divider; tight tolerance ensures accurate regulation. |
| Quiescent Current | 30 nA in shutdown - preserves battery life in always-on or low-power wake-up systems. |
| Thermal Shutdown | 165°C activation - protects device under overload or poor heatsinking; auto-recovery at ~150°C. |
| Efficiency | Up to 93% - achieved at mid-load with 1.8-V or 3.3-V output, minimizing heat generation in sealed enclosures. |
Pinout & Package
LMR10515XMF/NOPB uses the 5-pin SOT-23 (DBV) package (2.92 mm × 2.84 mm × 1.0 mm), optimized for high-density layouts. The exposed pad is not electrically connected and must be left floating or grounded per layout guidelines.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 SW | Switch node | Connects to inductor and catch diode cathode; carries high-frequency AC current - requires short, low-inductance routing. |
| 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 input (100 nA bias) minimizes divider current error. |
| 4 EN | Enable control | Logic-high active enable; must not float or exceed VIN + 0.3 V - internal pull-down ensures default disable on power-up. |
| 5 VIN | Input supply | Power input for both control circuitry and PMOS switch; requires local 22-µF ceramic capacitor with low ESL. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and design iteration time. |
| Current-mode PWM | Provides inherent cycle-by-cycle current limiting and fast transient response without external current sensing. |
| Internal soft-start | Ramps reference voltage over ~600 µs - prevents output overshoot and limits inrush into large output capacitors. |
| Ultra-low shutdown IQ | 30 nA typical - extends battery runtime in sleep modes for handheld and metering applications. |
| Thermal and OVP protection | Shuts down switch on junction >165°C or FB >0.69 V - safeguards IC and load during fault conditions. |
Applications
| Portable Hand-Held Instruments | Power Meters |
|---|---|
Use Scenario: Battery-powered multimeters and data loggers requiring regulated 1.8-V or 3.3-V rails from single-cell Li-ion or dual-cell alkaline sources. IC Role / Device Role / Timing Role: Primary point-of-load regulator converting 3.3-V or 5-V intermediate rail to precise analog/digital supply voltages. Use Value: 93% peak efficiency and 30-nA shutdown current extend operational time between battery charges or replacements. |
Use Scenario: Smart electricity meters with isolated microcontrollers, ADCs, and RF modules operating in confined enclosures. IC Role / Device Role / Timing Role: Local DC/DC converter supplying stable 3.3-V logic and 1.8-V core voltage from 5-V system rail. Use Value: Tiny SOT-23 footprint and internal compensation reduce solution size by >40% vs. controller-based alternatives. |
| Industrial Distributed Power | Space-Constrained Applications |
Use Scenario: DIN-rail mounted sensors and I/O modules where board area is limited and thermal dissipation is constrained. IC Role / Device Role / Timing Role: Compact step-down regulator powering isolated CAN transceivers and signal conditioning circuitry. Use Value: 1.6-MHz operation allows use of 1.0-µH inductors and 22-µF MLCCs - cuts total solution volume by >50% vs. 500-kHz converters. |
Use Scenario: Wearable health monitors and compact IoT edge nodes with strict height and area budgets. IC Role / Device Role / Timing Role: High-density voltage regulator delivering 1.2-V core voltage to ultra-low-power MCUs. Use Value: SOT-23 package (2.92 × 2.84 × 1.0 mm) and only 4 external components minimize PCB real estate and assembly cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62172DRVR | 2.25–5.5-V input, 1.6-MHz, 0.6-V reference, but uses external compensation and requires separate soft-start capacitor. | Higher component count and layout sensitivity; less suitable for ultra-fast design cycles. | Choose when adjustable frequency or tighter load-transient performance is required despite added complexity. |
| MP2143GJ-Z | 3–17-V input, 2-MHz, 1.2-A output, 0.8-V reference, and no integrated soft-start - requires external timing capacitor. | Broader input range but lower output current and looser reference accuracy (±2%) vs. LMR10515XMF/NOPB's ±20 mV. | Prefer for wide-input industrial supplies where 1.2-A output suffices and higher VIN tolerance is critical. |
Compared with TPS62172DRVR and MP2143GJ-Z, the LMR10515XMF/NOPB offers the lowest BOM count due to internal compensation and soft-start, highest output current in its 1.6-MHz class, and tightest feedback reference - making it optimal for rapid prototyping and space-limited battery-powered designs.
Availability
LMR10515XMF/NOPB is available at Aetrix Electronics and suitable for portable hand-held instruments, power meters, and industrial distributed power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMR10515XMF/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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The LMR10515XMF/NOPB belongs to TI's high-frequency monolithic buck regulator product line, engineered specifically for space-constrained, battery-sensitive applications demanding minimal external components and fast time-to-market.
FAQ
What is the switching frequency of the LMR10515XMF/NOPB?
The LMR10515XMF/NOPB operates at a fixed 1.6-MHz switching frequency, as confirmed in the datasheet's Electrical Characteristics table (FSW = 1.2–1.95 MHz, typical 1.6 MHz). This frequency is factory-trimmed and not user-adjustable, enabling consistent use of small inductors and ceramic capacitors without external timing components.
Does the LMR10515XMF/NOPB require external compensation components?
No, the LMR10515XMF/NOPB is internally compensated, as explicitly stated in the Features and Description sections. This eliminates the need for external compensation networks (e.g., RC networks across the error amplifier), reducing BOM count and simplifying layout - a key differentiator versus controller-based buck solutions.
What is the maximum continuous output current for the LMR10515XMF/NOPB?
The LMR10515XMF/NOPB delivers up to 1.5 A continuous output current under recommended operating conditions (TJ ≤ +125°C, proper PCB thermal design). The datasheet specifies a minimum current limit of 1.8 A and typical limit of 2.5 A, providing margin for transient loads while maintaining safe thermal operation at full rated current.
How does the enable (EN) pin function on the LMR10515XMF/NOPB?
The EN pin on the LMR10515XMF/NOPB is a logic-high active enable input with a threshold of 1.8 V (typical) and hysteresis to prevent chatter. It features an internal pull-down, ensuring the device remains disabled during power-up until a valid high signal is applied - no external pull-down resistor is required for reliable startup behavior.
What package type is used for the LMR10515XMF/NOPB?
The LMR10515XMF/NOPB is supplied in the 5-pin SOT-23 (DBV) package, measuring 2.92 mm × 2.84 mm × 1.0 mm. This package is distinct from the 6-pin WSON variant (LMR10515Y); the SOT-23 version integrates VINA and VIND internally and uses a single VIN pin, simplifying board routing for low-current applications.
LMR10515XMF/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:
- 1.5A
- 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
LMR10515XMF/NOPB FAQ
1.How can I place an order for LMR10515XMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10515XMF/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 LMR10515XMF/NOPB reliable?
The price and inventory of LMR10515XMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10515XMF/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10515XMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10515XMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10515XMF/NOPB?
LMR10515XMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10515XMF/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 LMR10515XMF/NOPB?
For technical support, including LMR10515XMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10515XMF/NOPB requirements.
6.How does Aetrix verify that LMR10515XMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10515XMF/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 LMR10515XMF/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10515XMF/NOPB?
All LMR10515XMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10515XMF/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 LMR10515XMF/NOPB part is unused and in its original packaging.
Return procedure for LMR10515XMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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