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Texas Instruments LM2831YSD/J7002202
- Part No.:
- LM2831YSD/J7002202
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2831YSD/J7002202.pdf
- Description:
- IC REG BUCK ADJ 1.5A 6WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2831YSD/J7002202 from Texas Instruments is a monolithic, current-mode PWM step-down DC-DC regulator IC in a 6-pin WSON (3.0 mm × 3.0 mm) package, delivering up to 1.5-A output current with 0.55-MHz fixed switching frequency, 0.6-V ±2% internal reference, and 130-mΩ PMOS switch. It operates from 3 V to 5.5 V input and supports adjustable output voltages from 0.6 V to 4.5 V - ideal for local core power conversion in space-constrained USB-powered devices.
For engineers reviewing the LM2831YSD/J7002202 datasheet, LM2831YSD/J7002202 pinout, LM2831YSD/J7002202 application, or LM2831YSD/J7002202 equivalent, key selection considerations include its 550-kHz switching frequency enabling compact magnetics, thermal shutdown at 165°C, 30-nA shutdown quiescent current, internal soft-start, and overvoltage protection - all critical for reliable low-voltage, high-efficiency point-of-load regulation.
Technical Context
The LM2831YSD/J7002202 implements constant-frequency current-mode control with an internal 0.6-V reference and pulse-by-pulse current limiting. Its 550-kHz oscillator enables stable operation with ceramic output capacitors and small inductors while maintaining >90% efficiency across 0.25–1.5-A loads at 3.3-V output.
It integrates undervoltage lockout (UVLO with 2.73-V turn-on and 2.3-V turn-off thresholds), internal soft-start (~600 µs ramp), and output overvoltage protection triggered at FB = 1.15 × VREF. The 6-pin WSON package features a thermal pad (DAP) tied to GND for enhanced thermal performance (RθJA = 54.9°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 0.55 MHz - enables use of ≤4.7-µH inductors and 22-µF ceramic output caps without compromising transient response. |
| Output Current | 1.5 A continuous - supports core rail requirements for HDDs, DSL modems, and USB peripherals. |
| Input Voltage Range | 3 V to 5.5 V - compatible with single-cell Li-ion, USB 5-V, and regulated 3.3-V/5-V system rails. |
| Feedback Reference | 0.6 V ±2% - sets precise output voltage via external resistor divider; enables 0.6-V minimum VOUT. |
| PMOS Switch RDS(ON) | 130 mΩ (TJ = 25°C) - limits conduction loss at full load; rises to 195 mΩ over –40°C to 125°C. |
| Quiescent Current | 2.8 mA (switching), 30 nA (shutdown) - minimizes standby power in battery-backed applications. |
| Thermal Shutdown | 165°C activation, ~150°C recovery - protects against sustained overload or poor PCB thermal design. |
Pinout & Package
LM2831YSD/J7002202 is housed in a thermally enhanced 6-pin WSON package (3.0 mm × 3.0 mm, 0.8-mm height) with an exposed die-attach pad (DAP) that must be soldered to a PCB ground plane for optimal thermal performance (RθJB = 29.2°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 6) | Enable control input | Logic-high (>1.8 V) enables regulation; floating or >VINA+0.3 V risks damage; supports ultra-low-IQ standby mode. |
| FB (Pin 1) | Feedback input | Monitors output via resistor divider; regulates VOUT = 0.6 V × (1 + R1/R2); bias current <100 nA minimizes divider error. |
| SW (Pin 3) | Switch node output | Drives external inductor and catch diode; swings from ~VIN to –0.3 V (Schottky VF) during off-time. |
| VINA (Pin 5) | Control circuit supply | Provides bias for internal logic and reference; must be shorted to VIND on PCB; not intended as primary power path. |
| VIND (Pin 4) | Power input supply | Primary input for PMOS switch; decoupled with ≥22-µF X5R ceramic cap close to pin; shares VIN domain with VINA. |
| GND (Pin 2) | Signal and power ground | Reference for FB, EN, and internal circuits; bottom resistor of feedback divider must connect here to minimize noise coupling. |
| DAP | Thermal pad | Exposed copper pad under package body; must be soldered to large GND copper area for thermal relief and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Ramps internal reference from 0 V to 0.6 V over ~600 µs - limits inrush current into output capacitance during power-up. |
| Overvoltage protection | Shuts down SW when FB exceeds 1.15 × 0.6 V = 0.69 V - prevents damage to downstream 3.3-V or 1.8-V ICs. |
| Current-mode PWM control | Enables fast transient response and inherent cycle-by-cycle current limiting at 2.5-A typical (1.8-A min) - simplifies loop compensation. |
| Ultra-low shutdown current | 30 nA max - extends battery life in always-on USB devices or sleep-mode peripherals without external load switches. |
| Integrated 130-mΩ PMOS switch | Eliminates need for external high-side MOSFET and driver; reduces BOM count and layout complexity in compact designs. |
Applications
| USB-Powered Devices | HDD Core Power |
|---|---|
|
Use Scenario: Powering FPGA I/O banks or microcontroller cores from a 5-V USB port in portable test equipment. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5-V USB input to stable 3.3-V or 1.8-V core rail with <1% load regulation. Use Value: 96% peak efficiency at 1.5-A load minimizes thermal stress in sealed enclosures; 30-nA shutdown preserves battery backup during host disconnect. |
Use Scenario: Supplying 1.2-V Vcore to 2.5-inch HDD controller ASICs in NAS enclosures. IC Role / Device Role / Timing Role: Local point-of-load converter with fast transient response to handle bursty read/write current demands. Use Value: 0.55-MHz switching allows use of low-ESR 22-µF X5R ceramics for sub-20-mV output ripple; thermal shutdown prevents data corruption during airflow blockage. |
| DSL Modems | Set-Top Boxes |
|
Use Scenario: Generating 3.3-V PHY interface rail from 5-V adapter in residential DSL gateways. IC Role / Device Role / Timing Role: High-efficiency buck regulator supporting 85–100% duty cycle at light loads to maintain regulation during low-power link states. Use Value: UVLO hysteresis (0.43 V) prevents oscillation during brown-out conditions; internal compensation eliminates external type-II network. |
Use Scenario: Providing 1.2-V SoC core voltage in cable set-top boxes with tight thermal constraints. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage placed directly beneath processor BGA for minimal PDN impedance. Use Value: WSON package with DAP enables 29.2°C/W board-level thermal resistance - sustains 1.5-A output at 65°C ambient without forced air. |
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 | 3-MHz switching, 95% efficiency at 1.5 A, 2.5-V to 6-V input, but requires external compensation and has no OVP. | Better suited for ultra-compact layouts needing <1-µH inductors; lacks integrated overvoltage protection. | Select TPS62130ARGTR only if higher frequency and smaller passives outweigh need for OVP and simplified design. |
| MP2108DJ-LF-Z | Fixed 3.3-V output, 1.5-A rating, 1.5-MHz switching, no adjustable FB - no resistor divider required. | Optimized for cost-sensitive fixed-output applications; cannot support 0.6–4.5-V programmability. | Choose MP2108DJ-LF-Z only for dedicated 3.3-V rails where flexibility and protection features are secondary to BOM cost. |
Compared with TPS62130ARGTR and MP2108DJ-LF-Z, LM2831YSD/J7002202 uniquely combines adjustable output, integrated OVP, internal soft-start, and 550-kHz operation optimized for mid-frequency efficiency and thermal manageability in WSON packaging - making it preferred for USB, HDD, and DSL applications requiring reliability and design simplicity.
Availability
LM2831YSD/J7002202 is available at Aetrix Electronics and suitable for USB-powered devices, HDD core power supplies, DSL modems, and set-top boxes requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2831YSD/J7002202 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 DC-DC conversion solutions.
The LM2831 product line delivers compact, high-efficiency step-down regulators for space-constrained, battery-aware, and thermally sensitive applications - designed specifically for USB, storage, and broadband consumer electronics.
FAQ
What is the switching frequency of the LM2831YSD/J7002202?
The LM2831YSD/J7002202 operates at a fixed 0.55-MHz switching frequency, optimized for high efficiency and compact external components. This frequency enables use of standard 2.2–4.7-µH shielded inductors and 22-µF X5R ceramic capacitors while maintaining >90% efficiency across 0.25–1.5-A loads. Frequency tolerance is ±25% over temperature and input voltage range.
Does the LM2831YSD/J7002202 require external compensation components?
No, the LM2831YSD/J7002202 features fully internal compensation, eliminating the need for external RC networks. Its current-mode architecture and factory-tuned loop response allow stable operation with only five external components: input capacitor, output capacitor, inductor, catch diode, and FB resistor divider - significantly reducing design time and layout sensitivity.
What protection features does the LM2831YSD/J7002202 include?
The LM2831YSD/J7002202 integrates thermal shutdown (165°C activation), output overvoltage protection (triggered at FB = 0.69 V), undervoltage lockout (2.73-V enable, 2.3-V disable with 0.43-V hysteresis), and cycle-by-cycle current limiting (2.5-A typical). These features ensure robust operation in real-world conditions without external supervision circuitry.
Can the LM2831YSD/J7002202 be used to generate a 0.6-V output?
Yes, the LM2831YSD/J7002202 supports 0.6-V output using a unity-gain configuration: connect R1 = 0 Ω between VO and FB, and R2 = 10 kΩ between FB and GND. Its 0.6-V ±2% internal reference ensures accurate low-voltage regulation essential for modern SoC core rails, with load regulation better than ±1% from 0 to 1.5 A.
What is the recommended PCB layout practice for the LM2831YSD/J7002202 thermal pad?
The exposed DAP (die-attach pad) of the LM2831YSD/J7002202 must be soldered to a solid GND copper pour covering ≥25 mm², with ≥4 thermal vias (0.3-mm diameter) connecting to inner-layer GND planes. This achieves the specified RθJB = 29.2°C/W and prevents thermal shutdown under 1.5-A continuous load at 65°C ambient - critical for reliable operation in enclosed systems.
LM2831YSD/J7002202 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN Exposed Pad
- Packaging:
- Bulk
- 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:
- 1.5A
- Frequency - Switching:
- 550kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LM2831YSD/J7002202 FAQ
1.How can I place an order for LM2831YSD/J7002202 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2831YSD/J7002202 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 LM2831YSD/J7002202 reliable?
The price and inventory of LM2831YSD/J7002202 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2831YSD/J7002202 is usually 5 days.
3.What payment methods are accepted for LM2831YSD/J7002202?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2831YSD/J7002202 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2831YSD/J7002202?
LM2831YSD/J7002202 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2831YSD/J7002202 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 LM2831YSD/J7002202?
For technical support, including LM2831YSD/J7002202 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2831YSD/J7002202 requirements.
6.How does Aetrix verify that LM2831YSD/J7002202 is sourced from the original manufacturer or authorized distributors?
All LM2831YSD/J7002202 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 LM2831YSD/J7002202 meets industry standards.
7.What is the process for return or replacement of LM2831YSD/J7002202?
All LM2831YSD/J7002202 units undergo pre-shipment inspection (PSI). If there is an issue with LM2831YSD/J7002202, 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 LM2831YSD/J7002202 part is unused and in its original packaging.
Return procedure for LM2831YSD/J7002202:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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