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Texas Instruments LMR10515YMF/NOPB
- Part No.:
- LMR10515YMF/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LMR10515YMF/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,407
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Product details
Overview
LMR10515YMF/NOPB from Texas Instruments is a monolithic 3-MHz, 1.5-A synchronous step-down DC/DC regulator in a 6-pin WSON package (3 × 3 × 0.8 mm), featuring internal PMOS switch (150 mΩ), 0.6-V feedback reference, and current-mode PWM control. It delivers regulated output voltages from 0.6 V to 4.5 V across 3–5.5-V input rails for space-constrained point-of-load conversion.
For engineers reviewing the LMR10515YMF/NOPB datasheet, LMR10515YMF/NOPB pinout, LMR10515YMF/NOPB application, or LMR10515YMF/NOPB equivalent, key selection criteria include switching frequency (3 MHz), shutdown quiescent current (30 nA), thermal shutdown threshold (165°C), internal compensation, and WSON-6 package compatibility with high-density PCB layouts.
Technical Context
The LMR10515YMF/NOPB implements fixed-frequency current-mode PWM control with an internally set 3-MHz oscillator, enabling sub-100 ns minimum on-time for stable regulation down to 0.6 V output. Its integrated 150-mΩ PMOS switch and internal soft-start (600 µs ramp) support fast transient response and controlled inrush current during startup.
It features undervoltage lockout (UVLO rising threshold 2.90 V, hysteresis 430 mV), cycle-by-cycle current limiting (typ. 2.5 A), output overvoltage protection (15% above 0.6 V reference), and thermal shutdown at 165°C with 15°C hysteresis - all operating across −40°C to +125°C junction temperature range.
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 system rails without pre-regulation. |
| Output Voltage Range | 0.6 V to 4.5 V - programmable via external resistor divider; enables core voltage scaling for low-power MCUs and FPGAs. |
| Max Output Current | 1.5 A - sufficient for powering SoCs, sensors, and interface ICs in portable instrumentation and industrial nodes. |
| Switching Frequency | 3 MHz - allows use of <1 µH inductors and small ceramic capacitors, minimizing solution footprint. |
| Feedback Reference | 0.600 V ±12 mV - high-accuracy reference enables tight output regulation (±2%) over line, load, and temperature. |
| Shutdown IQ | 30 nA typical - preserves battery life in always-on or sleep-mode applications such as smart meters and IoT edge nodes. |
| RDS(ON) | 150 mΩ (WSON) - low conduction loss supports >93% peak efficiency at 1.8-V/1-A output with 5-V input. |
| Thermal Shutdown | 165°C - protects against sustained overload or poor heatsinking in enclosed industrial enclosures. |
Pinout & Package
LMR10515YMF/NOPB uses the NGG (WSON-6) package: 3.00 mm × 3.00 mm body, 0.8 mm height, exposed die attach pad (DAP) for thermal enhancement. DAP must be soldered to PCB ground plane but is not a primary signal GND path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback input | Connects to bottom resistor of external voltage divider; regulates output by comparing divided VOUT to 0.6-V internal reference. |
| GND | Signal and power ground | Reference node for FB, EN, and internal circuitry; place feedback resistors close to this pin to minimize noise coupling. |
| SW | Switch node | Drives external inductor and catch diode; experiences full VIN-to-GND swing and requires tight layout to reduce EMI. |
| VIND | Power input supply | Primary input rail connection; supplies power to internal switch and high-side driver circuitry. |
| VINA | Control circuitry supply | Bias supply for internal logic and error amplifier; must be tied directly to VIND on PCB to ensure stable operation. |
| EN | Enable control | Active-high logic input; drives device into ultra-low-IQ shutdown (<30 nA) when pulled low or left floating (with internal pull-down). |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and design iteration time for stable loop response. |
| Current-mode PWM | Provides inherent cycle-by-cycle current limiting and fast transient response without requiring external current-sense resistor. |
| Internal soft-start | 600 µs reference ramp prevents output overshoot and limits inrush current during power-up in battery-powered systems. |
| Output overvoltage protection | Shuts off internal switch if FB exceeds 0.69 V (15% above 0.6 V), protecting downstream loads from fault-induced overvoltage. |
| Thermal shutdown with hysteresis | Disables switching at 165°C and re-enables only after junction cools to ~150°C - prevents thermal cycling and ensures safe recovery. |
| Ultra-low shutdown IQ | 30 nA draw enables multi-year battery life in maintenance-free remote sensors and metering devices. |
Applications
| Point-of-Load Conversion | Battery-Powered Instruments |
|---|---|
Use Scenario: Regulating 3.3-V or 5-V system rail to 1.2-V core voltage for an ARM Cortex-M4 microcontroller in a handheld test instrument. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 1.5-A continuous current with fast load-step response to handle CPU burst modes. Use Value: 3-MHz switching enables compact 1.0-µH inductor and 22-µF X7R MLCC output capacitor, reducing total solution area to <12 mm². | Use Scenario: Powering a low-power wireless sensor node (BLE + environmental sensor) operating from a single Li-ion cell (3.0–4.2 V). IC Role / Device Role / Timing Role: Main DC/DC converter supplying 3.3-V I/O and 1.8-V analog subsystem with ultra-low shutdown IQ preserving battery charge during sleep. Use Value: 30-nA shutdown current extends shelf life beyond 5 years; internal soft-start prevents brownout during cold-start from depleted cells. |
| Industrial Power Meters | Space-Constrained Embedded Controllers |
Use Scenario: Generating isolated 3.3-V and 5-V auxiliary rails in a DIN-rail mounted electricity meter with strict EMC and thermal constraints. IC Role / Device Role / Timing Role: Non-isolated buck stage feeding isolated DC/DC modules; operates continuously at 60°C ambient with forced-air cooling. Use Value: WSON-6 package with exposed DAP achieves θJA = 80°C/W - maintains <110°C junction under full load, avoiding thermal derating. | Use Scenario: Providing 1.0-V core voltage to an FPGA in a compact industrial PLC module where board real estate is limited to 15 × 15 mm. IC Role / Device Role / Timing Role: High-density point-of-load regulator with minimal external components (only inductor, diode, two resistors, three capacitors). Use Value: Internal compensation and 3-MHz operation allow full functionality with just six external parts - accelerates layout and validation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62172DSGR | 2.25-MHz fixed frequency, 0.6-V reference, 2-A output, 12-µA IQ (active), WSON-8 package (3 × 3 mm) | Higher output current and lower active IQ, but larger package and no UVLO hysteresis | Preferred when >1.5-A load or lower active power is required; requires minor PCB redesign due to different pinout and package size. |
| MP2143GJ-Z | 3-MHz switching, 0.6-V reference, 2-A output, 25-µA IQ (active), 8-pin QFN (2 × 2 mm), no internal soft-start | Smaller footprint and higher current, but lacks integrated soft-start and requires external compensation | Selected for ultra-compact designs needing >1.5-A capability; adds design complexity due to external compensation and soft-start circuit. |
Compared with TPS62172DSGR and MP2143GJ-Z, the LMR10515YMF/NOPB offers tighter UVLO hysteresis (430 mV), integrated soft-start, and simpler layout - making it optimal for cost-sensitive, thermally constrained, and battery-backed applications where 1.5-A output suffices.
Availability
LMR10515YMF/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions, battery-powered instrumentation, and industrial power metering requiring stable component supply and long-term production continuity.
Supply support for LMR10515YMF/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 headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies with broad industrial, automotive, and consumer reach.
The LMR10515YMF/NOPB belongs to TI's LMR series of high-frequency, monolithic buck regulators designed specifically for space-constrained, high-efficiency point-of-load applications in portable and industrial electronics.
FAQ
What is the switching frequency of the LMR10515YMF/NOPB?
The LMR10515YMF/NOPB has a fixed internal switching frequency of 3 MHz, optimized for use with small surface-mount inductors (<1 µH) and ceramic capacitors. This frequency is factory-set and cannot be adjusted externally. It enables high power density while maintaining >93% peak efficiency at 1.8-V/1-A output with 5-V input, as verified in TI's SNVS728D datasheet Figure 2.
Does the LMR10515YMF/NOPB require external compensation components?
No, the LMR10515YMF/NOPB is internally compensated, eliminating the need for external compensation networks such as RC or R-C networks typically required in open-loop buck controllers. This simplifies design, reduces BOM count, and ensures stable operation across its full 0.6–4.5-V output range and 3–5.5-V input range without tuning.
What is the maximum output current capability of the LMR10515YMF/NOPB?
The LMR10515YMF/NOPB delivers up to 1.5 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, proper PCB thermal design). Its current limit is specified at 1.8 A (min) and 2.5 A (typ), providing margin for transient peaks. Performance depends on thermal management - the WSON-6 package achieves θJA = 80°C/W with adequate copper pour.
How does the enable (EN) pin function on the LMR10515YMF/NOPB?
The EN pin on the LMR10515YMF/NOPB is an active-high logic input that controls device operation: logic high (>1.8 V) enables regulation; logic low (<0.4 V) places the device in ultra-low-IQ shutdown mode (30 nA typical). The pin includes internal pull-down, so it may be left unconnected for always-on operation, but must never exceed VINA + 0.3 V to avoid damage.
What package type is used for the LMR10515YMF/NOPB?
The LMR10515YMF/NOPB uses the NGG package - a 6-pin WSON (Wafer-Level Small Outline No-Lead) variant measuring 3.00 mm × 3.00 mm × 0.8 mm with an exposed die attach pad (DAP) for enhanced thermal performance. This package is distinct from the 5-pin SOT-23 option (LMR10515XMF/NOPB) and requires specific land pattern per TI's SLMA001B layout guidelines.
LMR10515YMF/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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LMR10515YMF/NOPB FAQ
1.How can I place an order for LMR10515YMF/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10515YMF/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 LMR10515YMF/NOPB reliable?
The price and inventory of LMR10515YMF/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10515YMF/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10515YMF/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10515YMF/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10515YMF/NOPB?
LMR10515YMF/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10515YMF/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 LMR10515YMF/NOPB?
For technical support, including LMR10515YMF/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10515YMF/NOPB requirements.
6.How does Aetrix verify that LMR10515YMF/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10515YMF/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 LMR10515YMF/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10515YMF/NOPB?
All LMR10515YMF/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10515YMF/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 LMR10515YMF/NOPB part is unused and in its original packaging.
Return procedure for LMR10515YMF/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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