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Texas Instruments LMR10520XSD/NOPB
- Part No.:
- LMR10520XSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LMR10520XSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:6,842
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Product details
Overview
LMR10520XSD/NOPB from Texas Instruments is a monolithic 1.6-MHz, 2-A synchronous step-down DC/DC regulator in a 6-pin WSON (3 mm × 3 mm) package, featuring an internal 150-mΩ PMOS switch, 0.6-V feedback reference, and current-mode PWM control. It delivers up to 2 A at output voltages from 0.6 V to 4.5 V from 3–5.5-V input rails, supporting point-of-load conversion in space-constrained industrial and portable instrumentation.
For engineers reviewing the LMR10520XSD/NOPB datasheet, LMR10520XSD/NOPB pinout, LMR10520XSD/NOPB application, or LMR10520XSD/NOPB equivalent, key selection considerations include its fixed 1.6-MHz switching frequency, ultra-low 30-nA shutdown quiescent current, internal soft-start, thermal shutdown, and compatibility with ceramic output capacitors for minimal PCB footprint.
Technical Context
The LMR10520XSD/NOPB employs current-mode PWM control with internal compensation, enabling stable regulation without external loop components. Its 30-ns minimum on-time supports high-frequency operation down to 0.6-V output across the full 3–5.5-V input range.
It integrates undervoltage lockout (2.73-V rising threshold, 430-mV hysteresis), cycle-by-cycle current limiting (2.4-A min), output overvoltage protection (15% above 0.6-V reference), and thermal shutdown (165°C trip). The dual-input VIN architecture separates power (VIND) and control (VINA) supplies, improving noise immunity.
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. |
| Output Voltage Range | 0.6 V to 4.5 V - programmable via external resistor divider; 0.6-V reference enables low-voltage core supply generation. |
| Max Output Current | 2 A - delivered continuously with internal 150-mΩ PMOS switch; peak current limit ≥2.4 A ensures robust overload handling. |
| Switching Frequency | 1.6 MHz - fixed frequency enables compact magnetics and ceramic capacitor use; no external frequency setting required. |
| Feedback Reference | 0.600 V ±12 mV - tight tolerance enables accurate output voltage setting; line regulation ≤0.02%/V minimizes drift with input variation. |
| Shutdown Quiescent Current | 30 nA typical - enables battery-powered systems to achieve multi-year shelf life in standby mode. |
| Junction Temperature Range | −40°C to +125°C - qualified for industrial ambient environments; thermal shutdown at 165°C prevents damage under sustained overload. |
Pinout & Package
LMR10520XSD/NOPB is housed in a thermally enhanced 6-pin WSON package (3.00 mm × 3.00 mm × 0.8 mm), with exposed die attach pad (DAP) for low thermal impedance to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback input | Connects to resistor divider midpoint; regulates output by comparing against 0.6-V internal reference. |
| GND | Signal and power ground | Reference node for feedback network and internal circuitry; bottom resistor must be placed adjacent to this pin. |
| SW | Switch node | Drives external inductor and catch diode; swings between ~VIN and −VD during operation. |
| VIND | Power input supply | Primary input rail connection; powers internal PMOS switch and high-current paths. |
| VINA | Control circuitry supply | Powers bias and logic circuits; must be tied to VIND on PCB for proper operation. |
| EN | Enable control input | Logic-high (>1.8 V) enables regulation; floating or >VINA+0.3 V prohibited; 30-nA shutdown current achieved when pulled low. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation components; reduces BOM count and layout sensitivity. |
| Internal soft-start (600 µs ramp) | Prevents inrush current and output overshoot during power-up; simplifies system sequencing. |
| Output overvoltage protection (OVP) | Shuts off PMOS switch if FB exceeds 0.69 V (15% above reference); protects downstream loads from fault conditions. |
| Thermal shutdown with hysteresis | Disables switching at 165°C junction temperature; resumes operation only after cooling to ~150°C, preventing thermal cycling. |
| Ultra-low shutdown IQ (30 nA) | Enables micropower sleep modes in battery-operated devices without compromising runtime. |
Applications
| Industrial Power Meters | Portable Hand-Held Instruments |
|---|---|
Use Scenario: Compact, battery-backed energy meter requiring stable 1.2-V or 1.8-V microcontroller supply with minimal board area. IC Role / Device Role / Timing Role: Primary step-down regulator converting 3.3-V rail to low-voltage core supply; operates at fixed 1.6-MHz frequency for predictable EMI profile. Use Value: 2-A capability supports burst-mode processing; 30-nA shutdown extends battery life; WSON package fits within tight mechanical envelopes. |
Use Scenario: Handheld test equipment needing reliable 3.3-V or 5-V derived supply from single-cell Li-ion or dual-cell alkaline battery. IC Role / Device Role / Timing Role: Point-of-load converter delivering regulated output under dynamic load transients; uses current-mode control for fast response. Use Value: Internal soft-start prevents display flicker at power-on; thermal shutdown safeguards against enclosure overheating during extended use. |
| Space-Constrained FPGA I/O Banks | Distributed Industrial Sensors |
Use Scenario: FPGA development board with multiple I/O banks requiring independent 1.8-V or 2.5-V supplies in limited PCB real estate. IC Role / Device Role / Timing Role: Dedicated per-rail buck converter; leverages 1.6-MHz switching to minimize inductor size and enable all-ceramic filtering. Use Value: Tiny 3-mm × 3-mm footprint allows placement directly beside FPGA; 0.6-V reference enables precise voltage setting for margining. |
Use Scenario: Remote sensor node powered by 24-V industrial bus, requiring isolated 3.3-V logic supply with high reliability. IC Role / Device Role / Timing Role: Primary DC/DC stage stepping down intermediate 5-V rail to 3.3-V MCU supply; operates across −40°C to +125°C junction range. Use Value: Undervoltage lockout (2.73 V) prevents erratic behavior during brownout; 150-mΩ RDS(ON) minimizes conduction loss in continuous operation. |
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 | 3-MHz fixed frequency, 0.6-V reference, 2-A rating; requires external compensation; smaller 2-mm × 2-mm WSON. | Better suited for ultra-high-density layouts where 1.6-MHz switching causes EMI concerns; higher frequency demands tighter layout but allows smaller inductors. | Select TPS62172DRVR when board space is more constrained than EMI budget, and when design team has experience tuning externally compensated loops. |
| LMR10510XSD/NOPB | Same family, 1-A output rating; identical 1.6-MHz frequency, 0.6-V reference, and WSON-6 package; shares pinout and most external component values. | Lower-cost option for sub-1-A loads; not suitable for 2-A continuous requirements due to reduced current limit and thermal margin. | Choose LMR10510XSD/NOPB only when verified peak load remains ≤1 A; avoid for designs with transient surges near 2 A. |
Compared with TPS62172DRVR, LMR10520XSD/NOPB offers simpler layout and lower EMI risk at 1.6 MHz but occupies slightly more area; versus LMR10510XSD/NOPB, it provides guaranteed 2-A delivery and higher thermal headroom, making it the sole choice for full-rated industrial loads.
Availability
LMR10520XSD/NOPB is available at Aetrix Electronics and suitable for industrial power meters, portable hand-held instruments, and space-constrained FPGA I/O banks requiring stable component supply with long-term manufacturability.
Supply support for LMR10520XSD/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 LMR10520XSD/NOPB belongs to TI's LMR series of high-frequency, integrated DC/DC regulators designed specifically for space- and efficiency-critical point-of-load applications in industrial, instrumentation, and portable electronics.
FAQ
What is the switching frequency of the LMR10520XSD/NOPB?
The LMR10520XSD/NOPB operates at a fixed 1.6-MHz switching frequency, as indicated by the "X" suffix in its part number. This frequency is factory-trimmed and does not require external configuration. It enables use of small surface-mount inductors and ceramic capacitors while maintaining high efficiency-up to 93% at 2-A load-and predictable EMI characteristics suitable for noise-sensitive applications.
Does the LMR10520XSD/NOPB require external compensation components?
No, the LMR10520XSD/NOPB features an internally compensated control loop. This eliminates the need for external compensation networks such as RC or R-C-D snubbers, reducing bill-of-materials count and layout complexity. The internal compensation is optimized for stability with standard ceramic output capacitors (≥22 µF) and typical inductor values used in 1.6-MHz buck designs.
How is the output voltage set on the LMR10520XSD/NOPB?
The output voltage of the LMR10520XSD/NOPB is set using a resistor divider connected between VOUT, FB, and GND. With a precise 0.600-V internal reference, the formula is VOUT = 0.6 × (1 + R1/R2). A common design uses R2 = 10 kΩ and calculates R1 accordingly-for example, 45.3 kΩ for 3.3-V output. The FB pin draws only 0.1–100 nA, minimizing divider current error.
What protection features does the LMR10520XSD/NOPB include?
The LMR10520XSD/NOPB integrates multiple protection functions: undervoltage lockout (UVLO) with 2.73-V turn-on and 430-mV hysteresis; cycle-by-cycle current limiting (≥2.4 A); thermal shutdown at 165°C with ~15°C hysteresis; and output overvoltage protection that disables the switch if FB exceeds 0.69 V. These features ensure robust operation under fault, overload, and thermal stress conditions without external circuitry.
Can the LMR10520XSD/NOPB be used with a single input supply for both VINA and VIND?
Yes-the LMR10520XSD/NOPB is designed to operate with VINA and VIND tied together on the PCB. The datasheet explicitly states "Connect VINA to VIND on PC board." This simplifies layout and power routing. Separating them is unnecessary unless specific noise isolation is required; however, doing so introduces no functional benefit and risks violating the absolute maximum rating if VINA exceeds VIND + 0.3 V.
LMR10520XSD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SIMPLE SWITCHER®
- Package/Case:
- 6-WDFN 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):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.6V
- Voltage - Output (Max):
- 4.5V
- Current - Output:
- 2A
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LMR10520XSD/NOPB FAQ
1.How can I place an order for LMR10520XSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10520XSD/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 LMR10520XSD/NOPB reliable?
The price and inventory of LMR10520XSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10520XSD/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10520XSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10520XSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10520XSD/NOPB?
LMR10520XSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10520XSD/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 LMR10520XSD/NOPB?
For technical support, including LMR10520XSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10520XSD/NOPB requirements.
6.How does Aetrix verify that LMR10520XSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10520XSD/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 LMR10520XSD/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10520XSD/NOPB?
All LMR10520XSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10520XSD/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 LMR10520XSD/NOPB part is unused and in its original packaging.
Return procedure for LMR10520XSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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