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Texas Instruments LMR10510YSDX/NOPB
- Part No.:
- LMR10510YSDX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LMR10510YSDX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,278
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Product details
Overview
LMR10510YSDX/NOPB from Texas Instruments is a 3-MHz, 1-A synchronous step-down DC/DC regulator in a 6-pin WSON package (3.0 × 3.0 × 0.8 mm), delivering 0.6–4.5 V output from 3–5.5 V input with internal PMOS switch (150 mΩ RDS(ON)), 30 nA shutdown current, and current-mode PWM control. It targets space-constrained point-of-load conversion in portable instruments and industrial power meters.
For engineers reviewing the LMR10510YSDX/NOPB datasheet, LMR10510YSDX/NOPB pinout, LMR10510YSDX/NOPB application, or LMR10510YSDX/NOPB equivalent, key selection criteria include switching frequency (3 MHz), thermal shutdown (165°C), feedback voltage accuracy (±2%), soft-start timing (600 µs), and WSON package thermal resistance (θJA = 80°C/W).
Technical Context
The LMR10510YSDX/NOPB implements constant-frequency current-mode PWM control with an internal 3-MHz oscillator, enabling sub-1-µs minimum on-time (30 ns) for high VIN-to-VOUT ratios down to 0.6 V. Its integrated 150-mΩ PMOS switch and internal compensation eliminate external loop components.
It features cycle-by-cycle current limiting (1.75 A typical), output overvoltage protection (15% above 0.6 V reference), undervoltage lockout with 430 mV hysteresis (2.73 V turn-on), and thermal shutdown with 15°C hysteresis (165°C trip, 150°C recovery).
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 - enables core voltage scaling for low-power MCUs and FPGAs. |
| Max Output Current | 1 A - sufficient for single-core processors, sensors, and RF transceivers in portable systems. |
| Switching Frequency | 3 MHz - allows use of ≤1 µH inductors and 22 µF ceramic capacitors, minimizing solution footprint. |
| Feedback Voltage | 0.600 V ±2% - sets output accuracy; used with external resistor divider to configure VOUT. |
| Quiescent Current | 30 nA in shutdown - extends battery life in always-on monitoring circuits. |
| RDS(ON) | 150 mΩ (WSON) - limits conduction loss at 1 A to ~150 mW, supporting >90% efficiency at mid-load. |
| Thermal Shutdown | 165°C - protects against sustained overload or poor PCB thermal design in enclosed enclosures. |
Pinout & Package
LMR10510YSDX/NOPB uses a thermally enhanced 6-pin WSON package (3.0 mm × 3.0 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 to 0.6 V internal reference. |
| GND | Signal and power ground | Reference for FB, EN, and SW return path; place bottom feedback resistor adjacent to minimize noise coupling. |
| SW | Switch node | Drives external inductor and catch diode; experiences full VIN-to-GND swing during operation. |
| VIND | Power input supply | Primary input rail connection; decoupled with ≥22 µF ceramic capacitor near pin. |
| VINA | Control circuitry supply | Bias supply for internal logic; must be tied directly to VIND on PCB to ensure stable enable and regulation. |
| EN | Enable control | Active-high logic input; <0.4 V disables regulator with 30 nA IQ; >1.8 V enables; must not float or exceed VINA + 0.3 V. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network - reduces BOM count and layout sensitivity. |
| Internal soft start | 600 µs controlled VOUT ramp prevents inrush current into downstream capacitance and avoids system brownout. |
| Pulse-by-pulse current limit | 1.75 A typical peak switch current limit prevents damage during short-circuit or startup overload. |
| Output overvoltage protection | Shuts off PMOS when FB exceeds 0.69 V (15% above 0.6 V), protecting load ICs from transient overvoltage. |
| Ultra-low shutdown IQ | 30 nA ensures <1 µW power draw in standby - critical for battery-backed real-time clocks and sensors. |
Applications
| Point-of-Load Conversion | Portable Hand-Held Instruments |
|---|---|
Use Scenario: Regulating 3.3 V rail to 1.8 V for MCU core supply in compact medical diagnostic handheld. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, low-noise core voltage with fast transient response. Use Value: 3 MHz switching enables <1 mm² total passive area; 0.6 V feedback reference ensures ±2% output accuracy across temperature. | Use Scenario: Powering display backlight and sensor interface in battery-operated multimeter with 200-hour runtime requirement. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating in discontinuous conduction mode at light loads. Use Value: 30 nA shutdown current minimizes quiescent drain; WSON thermal performance sustains 125°C junction under sealed enclosure conditions. |
| Industrial Power Meters | Space-Constrained Embedded Systems |
Use Scenario: Generating isolated 3.3 V logic supply from 5 V bus in DIN-rail mounted energy meter with strict EMC requirements. IC Role / Device Role / Timing Role: Compact, internally compensated DC/DC stage minimizing conducted EMI through fixed 3 MHz frequency and clean SW node transitions. Use Value: Low ESR ceramic output capacitor compatibility reduces high-frequency ripple; DAP grounding lowers radiated emissions via improved thermal/ground path. | Use Scenario: Supplying FPGA I/O bank voltage in ultra-thin IoT gateway module with <3 mm board height constraint. IC Role / Device Role / Timing Role: High-density power solution leveraging 3.0 × 3.0 mm WSON footprint and minimal external components (inductor, diode, two caps, two resistors). Use Value: 150 mΩ RDS(ON) and 3 MHz operation allow 1 A delivery in <12 mm² total solution area - 40% smaller than comparable 1.6 MHz alternatives. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMR10510XSDX/NOPB | 1.6 MHz switching frequency; 130 mΩ RDS(ON) in SOT-23; lower IQ (3.3 mA vs 4.3 mA) | Better efficiency at light loads; larger θJA (118°C/W) limits power density in confined spaces | Select for cost-sensitive, non-space-constrained designs where thermal headroom exists and 1.6 MHz is acceptable. |
| TPS62130ARGTR | 3 MHz, 1.2 A, 2.5–6 V input; 120 mΩ RDS(ON); requires external compensation | Higher current capability and wider input range; needs additional compensation components and layout tuning | Select when >1 A output or >5.5 V input is required, and design team has experience optimizing externally compensated buck loops. |
Compared with LMR10510YSDX/NOPB, the LMR10510XSDX/NOPB trades higher thermal resistance for lower quiescent current and reduced bill-of-materials, while the TPS62130ARGTR offers greater flexibility at the cost of increased design complexity and component count.
Availability
LMR10510YSDX/NOPB is available at Aetrix Electronics and suitable for point-of-load conversions, portable instrumentation, and industrial power metering requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMR10510YSDX/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 technologies, with decades of expertise in high-efficiency DC/DC conversion.
The LMR10510 product line delivers monolithic, high-frequency buck regulators optimized for space-constrained, battery-powered, and industrial distributed power applications where small solution size and robust thermal performance are critical.
FAQ
What is the switching frequency of the LMR10510YSDX/NOPB?
The LMR10510YSDX/NOPB operates at a fixed 3 MHz switching frequency. This high frequency enables the use of miniature inductors (≤1 µH) and low-ESR ceramic capacitors (22 µF), reducing total solution footprint. The 3 MHz option is distinguished from the 1.6 MHz LMR10510X variant and is confirmed in the Electrical Characteristics table (FSW = 2.25–3.75 MHz) and Pin Configuration section of the official TI datasheet SNVS727C.
Does the LMR10510YSDX/NOPB require external compensation components?
No, the LMR10510YSDX/NOPB is internally compensated. Its control loop is fully optimized for stability with only five external components: input capacitor, output capacitor, inductor, catch diode, and feedback resistor divider. This eliminates the need for external compensation networks (e.g., type-II or type-III compensators), simplifying layout and reducing design risk - a key feature explicitly stated in the "Features" and "Description" sections of the TI datasheet.
What package type does the LMR10510YSDX/NOPB use, and how is thermal performance characterized?
The LMR10510YSDX/NOPB uses a 6-pin WSON package (3.0 mm × 3.0 mm × 0.8 mm) with an exposed die attach pad (DAP). Thermal performance is specified as θJA = 80°C/W and θJC = 18°C/W under standard JEDEC test conditions. The DAP must be soldered to a large PCB copper pour connected to system ground to achieve these ratings - critical for sustaining 1 A continuous output in ambient temperatures up to +85°C.
How does the enable (EN) pin function on the LMR10510YSDX/NOPB?
The EN pin on the LMR10510YSDX/NOPB is an active-high logic input that controls regulator operation. A voltage ≥1.8 V enables the device; <0.4 V places it in ultra-low-IQ shutdown (30 nA typical). The pin must never be left floating and must not exceed VINA + 0.3 V. These thresholds and constraints are defined in the "Pin Descriptions" and "Electrical Characteristics" tables of the TI datasheet, ensuring predictable sequencing in multi-rail systems.
What is the feedback reference voltage and tolerance for the LMR10510YSDX/NOPB?
The LMR10510YSDX/NOPB has a precise internal feedback reference voltage of 0.600 V with a tolerance of ±2% (0.588 V to 0.612 V) over –40°C to +125°C. This value is used with an external resistor divider (R1/R2) to set the output voltage per the equation VOUT = 0.6 × (1 + R1/R2). The specification is fully production-tested and documented in Section 7.3 "Electrical Characteristics" of the TI datasheet SNVS727C.
LMR10510YSDX/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:
- 1A
- 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)
LMR10510YSDX/NOPB FAQ
1.How can I place an order for LMR10510YSDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10510YSDX/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 LMR10510YSDX/NOPB reliable?
The price and inventory of LMR10510YSDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10510YSDX/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10510YSDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10510YSDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10510YSDX/NOPB?
LMR10510YSDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10510YSDX/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 LMR10510YSDX/NOPB?
For technical support, including LMR10510YSDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10510YSDX/NOPB requirements.
6.How does Aetrix verify that LMR10510YSDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10510YSDX/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 LMR10510YSDX/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10510YSDX/NOPB?
All LMR10510YSDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10510YSDX/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 LMR10510YSDX/NOPB part is unused and in its original packaging.
Return procedure for LMR10510YSDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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