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Texas Instruments LMR10510YSD/NOPB
- Part No.:
- LMR10510YSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LMR10510YSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:8,190
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Product details
Overview
LMR10510YSD/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), operating from 3 V to 5.5 V input and delivering 0.6 V to 4.5 V output with internal 150-mΩ PMOS switch, 30 nA shutdown IQ, and current-mode PWM control. It serves as a compact point-of-load power supply in space-constrained industrial and portable instrumentation.
For engineers reviewing the LMR10510YSD/NOPB datasheet, LMR10510YSD/NOPB pinout, LMR10510YSD/NOPB application, or LMR10510YSD/NOPB equivalent, key selection criteria include its 3-MHz switching frequency enabling ultra-small external components, internal compensation eliminating loop compensation design effort, thermal shutdown at 165°C, and precise 0.600 V ±12 mV feedback reference for stable output regulation under load and line variation.
Technical Context
The LMR10510YSD/NOPB implements constant-frequency current-mode PWM control with an internal 3-MHz oscillator, enabling sub-300 ns minimum on-time for high duty-cycle operation down to 0.6 V output from 3 V input. Its integrated 150-mΩ PMOS switch and internal soft-start (600 µs ramp) ensure controlled startup without inrush current stress.
It features cycle-by-cycle overcurrent protection (1.75 A typical limit), undervoltage lockout with 430 mV hysteresis (2.73 V turn-on, 2.3 V turn-off), and output overvoltage protection triggered at 15% above VFB. The device uses internal compensation and requires no external compensation network.
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; enables core voltage scaling for low-power MCUs and FPGAs. |
| Max Output Current | 1 A - sufficient for powering single-core processors, sensors, and interface ICs in portable equipment. |
| Switching Frequency | 3 MHz - allows use of ≤1 µH inductors and 22-µF ceramic capacitors, minimizing solution footprint. |
| Feedback Reference | 0.600 V ±12 mV - tight tolerance ensures ±2% output accuracy across temperature and load without trimming. |
| Shutdown Quiescent Current | 30 nA - enables multi-year battery life in always-on IoT sensor nodes during deep sleep. |
| Thermal Shutdown Threshold | 165°C - protects against sustained overload or poor PCB thermal design while allowing full 125°C ambient operation. |
Pinout & Package
LMR10510YSD/NOPB is housed in a thermally enhanced 6-pin WSON package (3.0 mm × 3.0 mm × 0.8 mm) with exposed die attach pad (DAP) for low-impedance thermal path 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; must be tied directly to DAP and low-impedance ground plane. |
| SW | Switch node | Drives external inductor and catch diode; experiences full VIN-to-GND swing at 3 MHz. |
| VIND | Power input supply | Primary input rail connection; supplies internal PMOS switch and high-side driver circuitry. |
| VINA | Control circuitry supply | Bias supply for error amp, oscillator, and logic; must be connected to VIND on PCB for proper operation. |
| EN | Enable control | Active-high logic input; <0.4 V disables regulator with 30-nA IQ; >1.8 V enables operation. |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated | Eliminates need for external compensation network-reduces BOM count and layout sensitivity. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting and fast transient response to load steps. |
| Internal soft-start | 600 µs output ramp prevents inrush current and avoids undershoot on downstream LDOs or capacitive loads. |
| Output overvoltage protection | Shuts off PMOS switch if FB exceeds 15% above 0.6 V-prevents damage to 1.8-V or 3.3-V logic rails. |
| Thermal shutdown with hysteresis | Turns off at 165°C and resumes only after junction cools to ~150°C-avoids oscillatory shutdown/restart behavior. |
Applications
| Point-of-Load Power for Industrial Sensors | Battery-Powered Handheld Instruments |
|---|---|
Use Scenario: Regulating 3.3 V input to 1.8 V for MEMS pressure sensor and ADC in a field-deployed wireless node. IC Role / Device Role / Timing Role: Primary DC/DC converter providing stable, low-noise 1.8-V rail with fast load transient response to sensor sampling bursts. Use Value: 3-MHz operation minimizes inductor size (<1 µH), enabling full power stage within 12 mm² PCB area while maintaining >90% efficiency at 500 mA. | Use Scenario: Powering an ARM Cortex-M4 MCU, OLED display, and BLE radio from a single-cell Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Main buck regulator delivering 3.3 V at up to 1 A, with EN pin controlled by MCU to gate power during sleep modes. Use Value: 30 nA shutdown IQ extends battery runtime beyond 5 years in standby; internal soft-start prevents brownout during wake-up. |
| Space-Constrained Power Meters | Distributed Power in PLC I/O Modules |
Use Scenario: Generating isolated 5-V and 3.3-V rails in a DIN-rail mounted energy meter with strict height constraints (<10 mm). IC Role / Device Role / Timing Role: Compact non-isolated buck stage supplying auxiliary 3.3-V logic rail adjacent to isolation barrier. Use Value: WSON package's 0.8-mm profile and 3-MHz switching allow full 1-A solution height <2.5 mm-fits beneath standard heat sinks. | Use Scenario: Providing local 2.5-V supply for analog front-end and FPGA configuration in modular industrial I/O cards. IC Role / Device Role / Timing Role: Point-of-load regulator converting backplane 5-V rail to precise 2.5-V reference voltage for ADCs and DACs. Use Value: 0.600 V ±12 mV feedback reference enables 2.5-V output with <±1.5% total error across -40°C to +125°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62130ARGTR | 2.5-MHz fixed-frequency, 3-A output, 17-µA quiescent current in 3-mm × 2-mm QFN; lacks OVP and UVLO hysteresis. | Higher current capability suits dual-rail systems; higher IQ reduces battery life in always-on nodes. | Select when >1-A load or smaller package (2.0 × 3.0 mm) is required; verify external OVP needed for safety-critical outputs. |
| MP2143GJ-Z | 3-MHz, 2-A, 25-µA IQ, 0.6-V reference, but uses external compensation and requires separate bootstrap capacitor. | Greater flexibility in loop tuning and noise filtering; adds 2 passive components and layout complexity. | Choose when custom transient response or EMI shaping is required; avoid if rapid prototyping or minimal BOM is priority. |
Compared with TPS62130ARGTR and MP2143GJ-Z, the LMR10510YSD/NOPB delivers optimal balance of ultra-low shutdown IQ, internal compensation simplicity, and robust protection features in a thermally efficient WSON package-making it ideal for cost-sensitive, space-constrained, and battery-optimized designs where 1-A output suffices.
Availability
LMR10510YSD/NOPB is available at Aetrix Electronics and suitable for industrial distributed power applications, portable handheld instruments, and power meter designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LMR10510YSD/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-reliability power conversion ICs.
The LMR10510YSD/NOPB belongs to TI's LMR family of monolithic buck regulators designed specifically for space-constrained, high-efficiency point-of-load applications in industrial, test & measurement, and portable electronics.
FAQ
What is the switching frequency of the LMR10510YSD/NOPB?
The LMR10510YSD/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 inductors (≤1 µH) and ceramic capacitors (≥22 µF), reducing total solution size while maintaining >90% efficiency across its 1-A load range. The frequency remains stable over temperature and input voltage variations per datasheet Figure 5.
Does the LMR10510YSD/NOPB require external compensation components?
No, the LMR10510YSD/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 PCB layouts. This eliminates design iteration time and reduces BOM count-confirmed in Section 8.3.1 and Typical Application schematic (Figure 15) of the SNVS727C datasheet.
What is the purpose of the VINA and VIND pins on the LMR10510YSD/NOPB?
The LMR10510YSD/NOPB separates power and control supply paths: VIND powers the internal PMOS switch and high-side driver, while VINA supplies the error amplifier, oscillator, and logic circuits. Both pins must be connected to the same input rail on the PCB to ensure proper biasing and regulation. This architecture improves noise immunity and enables accurate reference generation independent of switch-node transients.
How does the LMR10510YSD/NOPB handle overvoltage conditions?
The LMR10510YSD/NOPB includes dedicated output overvoltage protection (OVP) that monitors the FB pin. If the feedback voltage exceeds 15% above the 0.6-V internal reference (i.e., >0.69 V), the internal PMOS switch is immediately disabled to prevent damage to downstream 1.8-V or 3.3-V logic. Recovery occurs automatically once FB falls below threshold-detailed in Section 8.3.2 of the datasheet.
Can the LMR10510YSD/NOPB be used with a 3-V input to generate 0.6-V output?
Yes, the LMR10510YSD/NOPB supports 3-V input and can regulate down to 0.6-V output, enabled by its 30-ns minimum on-time and current-mode architecture. At VIN = 3 V and VOUT = 0.6 V, the required duty cycle is 20%, well within the specified 7% minimum for the "Y" variant. Efficiency remains >85% at 1-A load per Figure 3 in the datasheet.
LMR10510YSD/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)
LMR10510YSD/NOPB FAQ
1.How can I place an order for LMR10510YSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LMR10510YSD/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 LMR10510YSD/NOPB reliable?
The price and inventory of LMR10510YSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LMR10510YSD/NOPB is usually 5 days.
3.What payment methods are accepted for LMR10510YSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LMR10510YSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LMR10510YSD/NOPB?
LMR10510YSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LMR10510YSD/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 LMR10510YSD/NOPB?
For technical support, including LMR10510YSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LMR10510YSD/NOPB requirements.
6.How does Aetrix verify that LMR10510YSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LMR10510YSD/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 LMR10510YSD/NOPB meets industry standards.
7.What is the process for return or replacement of LMR10510YSD/NOPB?
All LMR10510YSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LMR10510YSD/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 LMR10510YSD/NOPB part is unused and in its original packaging.
Return procedure for LMR10510YSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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