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Texas Instruments LMR10520YSD/NOPB
- Part No.:
- LMR10520YSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LMR10520YSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:1,630
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Product details
Overview
LMR10520YSD/NOPB from Texas Instruments is a monolithic 3-MHz, 2-A synchronous step-down DC/DC regulator in a 6-pin WSON (3 mm × 3 mm) package, featuring internal 150-mΩ PMOS switch, 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 V–5.5 V input rails, supporting point-of-load conversion in space-constrained battery-powered instruments.
For engineers reviewing the LMR10520YSD/NOPB datasheet, LMR10520YSD/NOPB pinout, LMR10520YSD/NOPB application, or LMR10520YSD/NOPB equivalent, key selection considerations include switching frequency (3 MHz), shutdown IQ (30 nA), thermal shutdown (165°C), duty cycle range (7%–90%), and internal compensation eliminating external loop components.
Technical Context
The LMR10520YSD/NOPB employs fixed-frequency current-mode PWM control with an internal 3-MHz oscillator, enabling stable regulation with fast transient response and minimal external components. Its integrated 150-mΩ PMOS switch supports 2-A continuous output while maintaining high efficiency-up to 93% at 3.3-V output-and ultra-low 30-nA shutdown current.
Internal soft-start (600 µs ramp), output overvoltage protection (15% above 0.6 V), undervoltage lockout (2.73 V rising, 2.3 V falling), and cycle-by-cycle current limiting (2.4 A min) ensure robust operation across −40°C to +125°C junction temperature. The device uses a single feedback resistor divider referenced to its precise 0.600-V internal 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 system rails without pre-regulation. |
| Output Voltage Range | 0.6 V to 4.5 V - set via external resistor divider; enables core voltage scaling for microcontrollers and FPGAs. |
| Max Output Current | 2 A - delivered continuously using internal 150-mΩ PMOS switch; eliminates need for external power MOSFETs. |
| Switching Frequency | 3 MHz (LMR10520Y variant) - allows use of small 1-µH inductors and 22-µF ceramic capacitors, minimizing solution footprint. |
| Feedback Reference | 0.600 V ±12 mV - high-precision internal reference enabling accurate output regulation across temperature and load. |
| Shutdown Quiescent Current | 30 nA typical - enables ultra-low-power standby in battery-operated systems with extended shelf life. |
| Thermal Shutdown Threshold | 165°C - protects against sustained overload or poor PCB thermal design; auto-recovery at ~150°C. |
Pinout & Package
LMR10520YSD/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) connected to system ground for low thermal impedance. The DAP is not a primary GND terminal but must be soldered to a thermal pad on the PCB.
| 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; bottom resistor of feedback network must be placed adjacent. |
| SW | Switch node | Drives external inductor and catch diode; swings between VIN and ~−0.4 V during off-time due to Schottky forward drop. |
| VIND | Main power input | Supplies internal PMOS switch; requires local 22-µF ceramic input capacitor for transient stability. |
| VINA | Control circuitry supply | Must be tied directly to VIND on PCB; powers internal bias, error amplifier, and oscillator circuits. |
| EN | Enable control | Logic-high (>1.8 V) enables regulation; floating or >VINA+0.3 V may cause malfunction; 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. |
| 3-MHz fixed switching frequency | Enables <1-mm height solution with 1-µH inductors and 22-µF X7R/X5R MLCCs; ideal for ultra-thin portable designs. |
| 0.6-V ±2% feedback reference | Supports tight output tolerance (±1%) at 1.2 V or 1.8 V with standard 1% resistors; minimizes margining overhead. |
| Internal soft-start (600 µs) | Controls output ramp rate to limit inrush current into downstream capacitance-prevents input rail sag and system reset. |
| Pulse-by-pulse current limit | Guards against short-circuit and overload with 2.4-A minimum trip threshold-ensures reliable fault recovery without latch-off. |
Applications
| Point-of-Load Regulation | Battery-Powered Instruments |
|---|---|
Use Scenario: Local 1.2-V or 1.8-V supply for ARM Cortex-M microcontroller cores in handheld test equipment. IC Role / Device Role / Timing Role: Primary step-down regulator delivering up to 2 A with fast load-transient response to handle CPU burst modes. Use Value: 3-MHz operation maintains regulation during 100-ns digital switching edges; internal compensation ensures stability with minimal PCB area. |
Use Scenario: Power management for portable multimeters or gas detectors operating from single-cell Li-ion (3.0–4.2 V). IC Role / Device Role / Timing Role: Main DC/DC converter stepping down battery voltage to 3.3 V for MCU, display, and sensor interfaces. Use Value: 30-nA shutdown current extends battery shelf life beyond 10 years; WSON package enables compact 12-mm² solution size. |
| Industrial Distributed Power | Power Metering Systems |
Use Scenario: Secondary 5-V-to-3.3-V conversion in DIN-rail mounted PLC I/O modules with strict thermal limits. IC Role / Device Role / Timing Role: High-density local regulator replacing discrete buck controllers and MOSFETs in confined enclosures. Use Value: 150-mΩ internal switch and 80°C/W θJA enable 2-A operation without heatsink at 50°C ambient. |
Use Scenario: Isolated auxiliary supply for metrology ADCs and real-time clocks in smart electricity meters. IC Role / Device Role / Timing Role: Low-noise, precision-regulated source for analog front-end and timekeeping circuits. Use Value: 0.6-V reference accuracy (±2%) and <0.02%/V line regulation ensure stable reference for 24-bit sigma-delta converters. |
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 switching frequency; 3-V to 17-V input; 0.6-V reference; 0.75-A max output; 6-pin WSON. | Higher input voltage range suits industrial 12-V rails; lower current rating limits use to sub-1-A loads. | Select when input exceeds 5.5 V or when lower quiescent current (15 µA active) is prioritized over output current. |
| LMR14203XSD/NOPB | 2.1-MHz frequency; 4.5-V to 42-V input; 0.6-V reference; 3-A max output; 8-pin SO PowerPAD. | Wider VIN range and higher current support automotive and 24-V industrial inputs; larger package increases footprint. | Choose for 12-V/24-V systems requiring >2 A or enhanced EMI performance via spread-spectrum option. |
Compared with TPS62172DSGR and LMR14203XSD/NOPB, the LMR10520YSD/NOPB offers optimal balance of 3-MHz speed, 2-A capability, and 3-mm × 3-mm footprint for 3.3-V/5-V point-of-load applications-delivering highest power density where input voltage is tightly bounded.
Availability
LMR10520YSD/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions, battery-powered instrumentation, and industrial distributed power applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LMR10520YSD/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-efficiency DC/DC conversion and industrial-grade reliability.
The LMR10520YSD/NOPB belongs to TI's LMR low-voltage step-down regulator family, designed specifically for compact, high-frequency power delivery in space- and thermal-constrained portable and industrial electronics.
FAQ
What is the switching frequency of the LMR10520YSD/NOPB?
The LMR10520YSD/NOPB operates at a fixed 3-MHz switching frequency, as indicated by the "Y" suffix in its part number. This high frequency enables use of miniature 1-µH inductors and low-ESR ceramic capacitors, reducing total solution size while maintaining high efficiency-up to 93% at 3.3-V output and 2-A load. Frequency tolerance is ±25% over temperature and input voltage.
Does the LMR10520YSD/NOPB require external compensation components?
No, the LMR10520YSD/NOPB features an internally compensated current-mode control loop. This eliminates the need for external compensation networks such as type-II or type-III compensators, simplifying design, reducing BOM count, and improving layout robustness-especially critical in high-density portable applications where board space is constrained.
What is the minimum output voltage supported by the LMR10520YSD/NOPB?
The LMR10520YSD/NOPB supports a minimum output voltage of 0.6 V, set by its internal feedback reference voltage. This value is fixed and highly accurate (0.588 V to 0.612 V over temperature), enabling precise regulation for low-voltage logic cores, DDR memory termination, and other sub-1-V applications when paired with appropriate resistor-divider ratios.
How does the enable (EN) pin function on the LMR10520YSD/NOPB?
The EN pin on the LMR10520YSD/NOPB is an active-high logic input that controls device startup and shutdown. A voltage ≥1.8 V enables regulation; pulling EN ≤0.4 V disables the regulator and reduces quiescent current to 30 nA typical. The pin must never float or exceed VINA + 0.3 V to prevent damage or erratic behavior.
What thermal protection features does the LMR10520YSD/NOPB include?
The LMR10520YSD/NOPB integrates thermal shutdown that disables the internal PMOS switch when junction temperature exceeds 165°C. Operation resumes automatically once the die cools to approximately 150°C. Combined with its 80°C/W θJA (in still air) and exposed DAP, this provides reliable protection under sustained overload or inadequate PCB copper area.
LMR10520YSD/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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LMR10520YSD/NOPB FAQ
1.How can I place an order for LMR10520YSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10520YSD/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 LMR10520YSD/NOPB reliable?
The price and inventory of LMR10520YSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10520YSD/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10520YSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10520YSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10520YSD/NOPB?
LMR10520YSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10520YSD/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 LMR10520YSD/NOPB?
For technical support, including LMR10520YSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10520YSD/NOPB requirements.
6.How does Aetrix verify that LMR10520YSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10520YSD/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 LMR10520YSD/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10520YSD/NOPB?
All LMR10520YSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10520YSD/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 LMR10520YSD/NOPB part is unused and in its original packaging.
Return procedure for LMR10520YSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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