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Texas Instruments LMR12015XSD/NOPB
- Part No.:
- LMR12015XSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LMR12015XSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1.5A 10WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LMR12015XSD/NOPB from Texas Instruments is a monolithic 2-MHz peak-current-mode PWM step-down DC/DC regulator in a 10-pin WSON (3 × 3 mm) package, delivering up to 1.5-A output current with 1% feedback voltage accuracy, 70-nA shutdown current, and input voltage support from 3 V to 20 V. It integrates a 150-mΩ NMOS switch and internal compensation for compact point-of-load power delivery in space-constrained industrial and embedded systems.
For engineers reviewing the LMR12015XSD/NOPB datasheet, LMR12015XSD/NOPB pinout, LMR12015XSD/NOPB application, or LMR12015XSD/NOPB equivalent, key selection considerations include its 65-ns minimum on-time for high-frequency operation, frequency synchronization range (1–2.35 MHz), thermal shutdown (165°C), overvoltage protection (1.13 V on FB), and tight line/load regulation suitable for powering FPGAs, microcontrollers, and ADCs.
Technical Context
The LMR12015XSD/NOPB employs peak-current-mode PWM control with an internally compensated error amplifier and fixed 2-MHz oscillator-synchronizable externally via the SYNC pin. Its architecture supports ultra-low duty-cycle operation (down to ~65 ns on-time) and includes frequency foldback during short-circuit events, reducing switching frequency to 220 kHz when FB falls below 0.53 V.
It features dual supply rails (PVIN for power stage, AVIN for control circuitry), separate BOOST and SW pins enabling bootstrap gate drive, and integrated protections including cycle-by-cycle current limiting (2.0 A min), UVLO (2.75 V typ with 470 mV hysteresis), and thermal shutdown with 15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 20 V - supports direct regulation from common 3.3-V, 5-V, and 12-V rails without pre-regulation. |
| Output Current | 1.5 A max - sufficient for powering mid-tier microcontrollers, sensors, and interface ICs with margin. |
| Switching Frequency | 2 MHz (internal), synchronizable 1–2.35 MHz - enables use of sub-2.2-µH inductors and chip-scale capacitors. |
| Feedback Voltage Accuracy | ±1% over –40°C to +125°C - ensures stable output regulation for precision analog and digital loads. |
| Shutdown Current | 70 nA - minimizes battery drain in always-on or low-power standby modes. |
| Minimum On-Time | 65 ns - allows high VIN-to-VOUT conversion ratios (e.g., 12 V → 1.2 V at >90% duty cycle) without pulse-skipping instability. |
| Thermal Shutdown Threshold | 165°C - protects against sustained overload or poor PCB thermal design while allowing full rated load at +85°C ambient. |
Pinout & Package
LMR12015XSD/NOPB uses a thermally enhanced 10-pin WSON (DSC) package measuring 3.00 mm × 3.00 mm × 0.8 mm, with exposed DAP (Die Attach Pad) tied directly to GND for optimal thermal dissipation and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,2) | Switch node | Connects to inductor, catch diode cathode, and bootstrap capacitor; carries high di/dt switching current - requires tight layout and ground plane stitching. |
| BOOST (Pin 3) | Bootstrap supply | Drives NMOS gate; voltage = VSW + ~3.9 V - requires 0.1-µF ceramic capacitor between BOOST and SW for reliable high-side switching. |
| EN (Pin 4) | Enable control | Logic-high (>1.8 V) enables regulation; logic-low (<0.4 V) disables with 70-nA quiescent draw - must not float or exceed VIN + 0.3 V. |
| SYNC (Pin 5) | Frequency sync input | Accepts external clock (1–2.35 MHz); grounding selects internal 2-MHz oscillator - enables EMI management and multi-rail synchronization. |
| FB (Pin 6) | Feedback sense | Monitors resistor divider output; regulates VOUT by maintaining 1.0 V on FB - placement near GND (Pin 7) critical for accuracy. |
| GND (Pin 7) | Signal & power ground | Reference for FB, EN, SYNC, and AVIN - must be connected to DAP and system ground plane with low-inductance path. |
| AVIN (Pin 8) | Analog supply | Powers internal control circuitry (error amp, oscillator, logic); bypass with 0.1-µF capacitor to GND for noise immunity. |
| PVIN (Pins 9,10) | Power input | Supplies NMOS switch; accepts full 3–20 V input - requires local 4.7-µF ceramic capacitor to minimize high-frequency ripple. |
| DAP | Thermal pad | Exposed copper pad under package - must be soldered to solid GND plane (≥4 thermal vias recommended) for θJA = 33°C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation network - reduces BOM count and layout sensitivity while maintaining stability across 1–18 V output range. |
| Fixed 1-ms internal soft-start | Prevents inrush current and output overshoot during power-up - ramps reference from 0 V to 1.0 V linearly, compatible with slow-ramp input supplies. |
| Output overvoltage protection (OVP) | Shuts down NMOS switch if FB exceeds 1.13 V - protects downstream logic from catastrophic overvoltage due to feedback resistor failure or transient events. |
| Peak-current-mode PWM architecture | Provides inherent cycle-by-cycle current limiting and fast transient response - enables stable operation with ceramic output capacitors and no external current-sense resistor. |
| Ultra-low shutdown current | 70-nA IQ in shutdown - extends battery life in portable devices and enables "always-on" monitoring circuits without significant leakage penalty. |
Applications
| Industrial PLC I/O Modules | FPGA Core Voltage Supply |
|---|---|
Use Scenario: Powering isolated 3.3-V or 5-V digital I/O banks in programmable logic controllers with strict EMC and thermal constraints. IC Role / Device Role / Timing Role: Primary buck regulator converting 12-V backplane to localized 3.3-V rail; operates at 2 MHz to avoid AM band interference. Use Value: Compact 3×3-mm footprint saves board area in dense modular designs; 90% efficiency at 1-A load reduces heat sink requirements. | Use Scenario: Delivering tightly regulated 1.2-V core voltage to Xilinx Artix-7 or Intel Cyclone V FPGA with dynamic current demands up to 1.3 A. IC Role / Device Role / Timing Role: Point-of-load regulator with fast transient response; uses internal soft-start and OVP to prevent configuration corruption during power sequencing. Use Value: ±1% VFB accuracy ensures FPGA meets VCCINT tolerance; 65-ns minimum on-time supports 12-V input to 1.2-V output without pulse-skipping artifacts. |
| Automotive Body Control Units | Medical Sensor Signal Chain |
Use Scenario: Generating 5-V auxiliary rail from 12-V vehicle battery for CAN transceivers, EEPROMs, and LED drivers in BCM modules. IC Role / Device Role / Timing Role: High-reliability buck converter with UVLO (2.75 V) and thermal shutdown (165°C) - withstands cold-crank and load-dump conditions. Use Value: 70-nA shutdown current preserves battery during vehicle sleep mode; WSON package passes AEC-Q200 thermal cycling stress. | Use Scenario: Powering low-noise 24-bit ADCs and instrumentation amplifiers in portable patient monitors requiring clean, stable 3.3-V analog supply. IC Role / Device Role / Timing Role: Low-ripple, low-EMI power source; synchronized to system clock to eliminate beat frequencies in sensitive analog front-ends. Use Value: 2-MHz switching enables small LC filter size; internal compensation avoids phase-margin degradation from layout parasitics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR12020XSD/NOPB | Same package and pinout; delivers 2-A max output vs. 1.5-A - higher RDS(ON) (150 mΩ vs. 150 mΩ typical) but identical control architecture. | Required where peak load exceeds 1.5 A; same PCB layout usable with minor inductor/capacitor derating. | Select when higher output current headroom is needed without changing footprint or control loop design. |
| TPS62130ARGTR | 3-MHz fixed-frequency buck; 95% peak efficiency; 1.8-V to 6-V input; 3-A output - different pinout, no SYNC, lower VIN range, higher IQ (17 µA active). | Better suited for low-input, high-efficiency apps (e.g., USB-powered devices); lacks frequency sync and wide-VIN capability. | Choose for cost-sensitive, single-rail 3.3-V/5-V systems where 20-V input tolerance is unnecessary. |
Compared with LMR12020XSD/NOPB, the LMR12015XSD/NOPB offers tighter current-limit margin for thermal safety in constrained layouts; versus TPS62130ARGTR, it provides superior wide-input flexibility and EMI control via SYNC, at the expense of slightly lower peak efficiency.
Availability
LMR12015XSD/NOPB is available at Aetrix Electronics and suitable for industrial automation, medical sensor modules, and automotive body electronics requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for LMR12015XSD/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 ICs, with decades of expertise in high-reliability DC/DC conversion solutions.
The LMR120xx product line was designed specifically for space-constrained, high-frequency point-of-load applications demanding minimal external components, fast transient response, and robust protection - targeting industrial, automotive, and communications infrastructure markets.
FAQ
What is the maximum supported input voltage for the LMR12015XSD/NOPB?
The LMR12015XSD/NOPB supports an absolute maximum input voltage of 24 V on PVIN and AVIN pins, with recommended operating range from 3 V to 20 V. Exceeding 20 V continuously may trigger overvoltage stress or reduce reliability; operation above 20 V is only permissible for short-duration transients within the device's absolute maximum ratings.
Does the LMR12015XSD/NOPB require external compensation components?
No, the LMR12015XSD/NOPB features an internally compensated control loop optimized for stability across its full output voltage range (1 V to 18 V) and load conditions. This eliminates the need for external compensation networks, simplifying design and reducing bill-of-materials count while maintaining phase margin above 45° per TI's characterization data.
How does the SYNC pin function on the LMR12015XSD/NOPB?
The SYNC pin on the LMR12015XSD/NOPB accepts an external clock signal (1–2.35 MHz) to override the internal 2-MHz oscillator. When driven with a valid logic-high pulse train, the device synchronizes switching edges to the external source; if the signal is lost, it reverts to internal oscillation within 1.5 µs. Grounding SYNC selects the default 2-MHz mode.
What thermal performance can be expected from the LMR12015XSD/NOPB in a standard 4-layer PCB layout?
In a standard 4-layer PCB with 2 oz. copper and the DAP thermally connected to a solid GND plane using ≥4 vias, the LMR12015XSD/NOPB achieves a junction-to-ambient thermal resistance (θJA) of 33°C/W. At 1.5-A load and 12-V input, this yields ~45°C junction rise above ambient - well within the 125°C max operating temperature limit.
Can the LMR12015XSD/NOPB safely regulate output voltages above 3.3 V?
Yes, the LMR12015XSD/NOPB supports output voltages up to 18 V, but for outputs >3.3 V, a minimum load current is required to ensure proper CBOOST charging via the catch diode. TI recommends ≥10 mA minimum load for VOUT >3.3 V to maintain reliable gate drive and prevent dropout - verified in typical application testing per SNVS817B Rev B.
LMR12015XSD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 10-WFDFN Exposed Pad
- 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):
- 20V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 18V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-WSON (3x3)
LMR12015XSD/NOPB FAQ
1.How can I place an order for LMR12015XSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR12015XSD/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 LMR12015XSD/NOPB reliable?
The price and inventory of LMR12015XSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR12015XSD/NOPB is usually 5 days.
3.What payment methods are accepted for LMR12015XSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR12015XSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR12015XSD/NOPB?
LMR12015XSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR12015XSD/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 LMR12015XSD/NOPB?
For technical support, including LMR12015XSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR12015XSD/NOPB requirements.
6.How does Aetrix verify that LMR12015XSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR12015XSD/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 LMR12015XSD/NOPB meets industry standards.
7.What is the process for return or replacement of LMR12015XSD/NOPB?
All LMR12015XSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR12015XSD/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 LMR12015XSD/NOPB part is unused and in its original packaging.
Return procedure for LMR12015XSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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