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Texas Instruments LMR10520XSDE/NOPB
- Part No.:
- LMR10520XSDE/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LMR10520XSDE/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:723
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Product details
Overview
LMR10520XSDE/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. It operates from 3 V to 5.5 V input, delivers 0.6 V to 4.5 V output, features internal 150-mΩ PMOS switch, 30 nA shutdown current, and current-mode PWM control. It serves as a compact point-of-load power supply in space-constrained industrial and portable systems.
For engineers reviewing the LMR10520XSDE/NOPB datasheet, LMR10520XSDE/NOPB pinout, LMR10520XSDE/NOPB application, or LMR10520XSDE/NOPB equivalent, key selection criteria include its 1.6-MHz fixed switching frequency, internal compensation, thermal shutdown at 165°C, 0.6-V feedback reference, and support for 2-A continuous load with minimal external components.
Technical Context
The LMR10520XSDE/NOPB uses current-mode PWM control with an internal 150-mΩ PMOS high-side switch and requires no external compensation. Its 1.6-MHz oscillator enables use of small ceramic capacitors and low-profile inductors, supporting fast transient response and high power density in minimal PCB area.
It integrates soft-start (600 µs ramp), undervoltage lockout (2.73 V rising threshold, 430 mV hysteresis), cycle-by-cycle current limit (2.4 A min), output overvoltage protection (15% above 0.6 V), and thermal shutdown (165°C trip, 150°C recovery). The FB pin senses output via resistor divider with 0.600 V ±12 mV reference.
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 - programmable via external resistor divider; 0.600 V ±12 mV feedback reference enables precise low-voltage core supplies. |
| Max Output Current | 2 A continuous - delivered using integrated 150-mΩ PMOS switch; peak current limit ≥2.4 A ensures robust overload handling. |
| Switching Frequency | 1.6 MHz (X variant) - enables <1 µH inductors and 22-µF ceramic capacitors, minimizing solution footprint and EMI filter size. |
| Shutdown Quiescent Current | 30 nA typical - preserves battery life in always-on or sleep-mode applications such as portable instruments and smart meters. |
| Feedback Reference Voltage | 0.600 V ±12 mV - tight tolerance reduces output voltage error across temperature and line variations. |
| Thermal Shutdown Threshold | 165°C - protects against sustained overload or poor heatsinking; auto-recovery at ~150°C enables fault-tolerant operation. |
Pinout & Package
LMR10520XSDE/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. The DAP must be soldered to system ground but is not a primary current-carrying GND path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback input | Connects to resistor divider midpoint; 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 bottom feedback resistor adjacent to minimize noise coupling. |
| SW | Switch node | Drives external inductor and catch diode; swings from VIN to −0.3 V during off-time; requires low-inductance layout. |
| VIND | Main power input | Supplies internal PMOS switch; connect directly to input capacitor with short, wide trace. |
| VINA | Control circuitry supply | Bias rail for internal logic; must be tied to VIND on PCB-no separate decoupling required. |
| EN | Enable control | Logic-high (>1.8 V) enables regulation; floating or >VINA+0.3 V risks malfunction; 30-nA shutdown current enabled when pulled low. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated control loop | Eliminates need for external compensation network-reduces BOM count and design iteration time. |
| 1.6-MHz fixed-frequency PWM | Enables use of sub-1-µH shielded inductors and 22-µF X7R/X5R MLCCs, cutting solution size by >40% vs. 500-kHz converters. |
| Internal soft-start (600 µs) | Prevents inrush current into output capacitors and downstream loads-critical for FPGA, MCU, and ASIC power sequencing. |
| Output overvoltage protection | Shuts down switch if FB exceeds 0.69 V (15% above 0.6 V), preventing damage to sensitive 1.2-V or 1.8-V loads. |
| Thermal shutdown with hysteresis | Halts switching at 165°C junction temp and resumes only after cooling to ~150°C-avoids thermal cycling and ensures safe recovery. |
Applications
| Point-of-Load Conversion | Portable Hand-Held Instruments |
|---|---|
Use Scenario: Regulating 3.3-V or 5-V system rail to 1.2-V or 1.8-V for microcontroller cores in compact embedded controllers. IC Role / Device Role / Timing Role: Primary DC/DC buck converter providing stable, low-noise, high-efficiency local power with fast transient response. Use Value: Delivers 2-A peak current within 3 mm × 3 mm footprint, enabling dense PCB layouts without compromising thermal performance. | Use Scenario: Powering battery-operated handheld test equipment requiring long runtime and reliable cold-temperature startup. IC Role / Device Role / Timing Role: Main system regulator converting single-cell Li-ion (3.0–4.2 V) or dual-cell alkaline (3–5.5 V) to fixed 3.3-V logic rail. Use Value: 30-nA shutdown IQ extends battery life; −40°C to +125°C operating range ensures functionality in field-deployed units. |
| Industrial Distributed Power | Power Meters |
Use Scenario: Providing isolated 5-V or 3.3-V auxiliary power in DIN-rail mounted PLC I/O modules with strict EMC and space constraints. IC Role / Device Role / Timing Role: Compact, internally compensated buck regulator replacing discrete solutions with higher component count and layout sensitivity. Use Value: 1.6-MHz operation minimizes conducted EMI; WSON package supports automated assembly and high thermal reliability. | Use Scenario: Supplying precision analog front-end (AFE) and metrology SoC in revenue-grade electricity meters. IC Role / Device Role / Timing Role: Low-noise, tightly regulated 3.3-V supply for ADC references and communication interfaces (RS-485, PLC). Use Value: 0.600 V ±12 mV FB reference and <0.02%/V line regulation ensure stable output under varying grid input conditions. |
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 | 1.2-MHz switching frequency, 0.6-V reference, 2-A rating, same 6-pin WSON package but different pinout (EN/FB swapped); 25-µA shutdown IQ. | Lower switching frequency increases inductor size; pinout mismatch requires PCB redesign. | Select when lower EMI priority outweighs board space constraints and layout revision is feasible. |
| MP2143GJ-Z | 2-MHz frequency, 0.6-V reference, 2-A rating, 8-pin TSOT23 package; 30-µA shutdown IQ; requires external compensation. | Higher frequency allows smaller magnetics but adds compensation complexity; larger package increases footprint. | Choose when needing higher frequency than 1.6 MHz and accepting extra design effort for stability tuning. |
Compared with TPS62172DSGR and MP2143GJ-Z, the LMR10520XSDE/NOPB offers optimal balance of fixed 1.6-MHz operation, zero-compensation simplicity, and smallest possible WSON footprint-making it ideal for cost-sensitive, space-constrained designs where layout reuse and rapid qualification are critical.
Availability
LMR10520XSDE/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions, portable instrumentation, and industrial distributed power applications requiring stable component supply, long-term manufacturability, and TI's industry-standard quality assurance.
Supply support for LMR10520XSDE/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 delivering analog, embedded processing, and connectivity technologies for industrial, automotive, and consumer applications.
The LMR10520XSDE/NOPB belongs to TI's LMR series of high-frequency, monolithic buck regulators designed specifically for space-constrained, high-efficiency point-of-load power conversion in portable and industrial systems.
FAQ
What is the switching frequency of the LMR10520XSDE/NOPB?
The LMR10520XSDE/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 programming. It enables use of compact 1-µH inductors and 22-µF ceramic output capacitors while maintaining high efficiency (up to 93%) across its 3-V to 5.5-V input range. The LMR10520XSDE/NOPB datasheet confirms this value with typical tolerance of ±250 kHz over temperature.
Does the LMR10520XSDE/NOPB require external compensation components?
No, the LMR10520XSDE/NOPB is internally compensated and requires no external compensation network. Its control loop is optimized for stability with standard 22-µF ceramic output capacitors and typical inductor values (1–2.2 µH). This simplifies design, reduces BOM count, and eliminates tuning iterations-confirmed in Section 7.3.1 and Figure 14 of the LMR10520XSDE/NOPB datasheet.
What is the minimum output voltage supported by the LMR10520XSDE/NOPB?
The LMR10520XSDE/NOPB supports a minimum output voltage of 0.6 V, set by its internal 0.600 V ±12 mV feedback reference. This is achieved by connecting the FB pin directly to the output (unity-gain configuration) or using a resistor divider with R2 ≥10 kΩ. The LMR10520XSDE/NOPB maintains regulation accuracy and transient response down to this level, as verified in electrical characteristics Table 6.3 and Figure 16 load regulation curves.
How does the enable (EN) pin function on the LMR10520XSDE/NOPB?
The EN pin on the LMR10520XSDE/NOPB is an active-high logic input that enables or disables regulation. A voltage ≥1.8 V enables operation; <0.4 V forces shutdown with 30-nA quiescent current. The pin must never float or exceed VINA + 0.3 V, per Pin Descriptions in Section 5 of the LMR10520XSDE/NOPB datasheet. Internal pull-down ensures default disable on power-up unless actively driven.
What thermal protection features does the LMR10520XSDE/NOPB include?
The LMR10520XSDE/NOPB includes thermal shutdown that disables the internal PMOS switch when junction temperature exceeds 165°C. Operation resumes only after temperature falls to approximately 150°C, providing hysteresis to prevent oscillation. This protection is independent of load current and ambient conditions, and is documented in Section 7.3.5 and Absolute Maximum Ratings Table 6.1 of the LMR10520XSDE/NOPB datasheet.
LMR10520XSDE/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)
LMR10520XSDE/NOPB FAQ
1.How can I place an order for LMR10520XSDE/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10520XSDE/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 LMR10520XSDE/NOPB reliable?
The price and inventory of LMR10520XSDE/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10520XSDE/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10520XSDE/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10520XSDE/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10520XSDE/NOPB?
LMR10520XSDE/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10520XSDE/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 LMR10520XSDE/NOPB?
For technical support, including LMR10520XSDE/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10520XSDE/NOPB requirements.
6.How does Aetrix verify that LMR10520XSDE/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10520XSDE/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 LMR10520XSDE/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10520XSDE/NOPB?
All LMR10520XSDE/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10520XSDE/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 LMR10520XSDE/NOPB part is unused and in its original packaging.
Return procedure for LMR10520XSDE/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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