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Texas Instruments LM2832XMYX/NOPB
- Part No.:
- LM2832XMYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2832XMYX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 8HVSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,492
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Product details
Overview
LM2832XMYX/NOPB from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in an 8-pin eMSOP-PowerPAD package, delivering 2.0A output current with 0.6V internal reference (±2%), 1.6MHz fixed switching frequency, and 150mΩ PMOS switch. It regulates 3.3V output from 5V input in compact local power supplies for USB-powered devices and set-top boxes.
For engineers reviewing the LM2832XMYX/NOPB datasheet, LM2832XMYX/NOPB pinout, LM2832XMYX/NOPB application, or LM2832XMYX/NOPB equivalent, key selection criteria include verified 1.6MHz operation, thermal shutdown at 165°C, undervoltage lockout with 430mV hysteresis, and confirmed compatibility with ceramic output capacitors in space-constrained designs.
Technical Context
The LM2832XMYX/NOPB implements current-mode PWM control with internal compensation, enabling stable regulation across 3V–5.5V input and 0.6V–4.5V output ranges without external loop components. Its 30ns minimum on-time supports high-frequency conversion down to 0.6V output while maintaining fast transient response.
It integrates soft-start (600µs ramp), overvoltage protection (15% above VREF), cycle-by-cycle current limiting (3.25A typical), and thermal shutdown with 15°C hysteresis. The eMSOP-PowerPAD package provides low thermal impedance via exposed die attach pad connected to system ground.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6 MHz - enables use of sub-2.2µH inductors and 22µF ceramic output capacitors, minimizing PCB area. |
| Output Current | 2.0 A - delivers full rated load without derating at TJ ≤ 125°C with proper thermal layout. |
| Feedback Voltage | 0.600 V ±2% - sets precise output voltage via resistor divider; line regulation <0.02%/V ensures stability across input range. |
| Input Voltage Range | 3.0 V to 5.5 V - supports direct regulation from USB 5V, single-cell Li-ion, or 3.3V/5V rails. |
| PMOS RDS(ON) | 155 mΩ - limits conduction loss to ≤306 mW at 1.75A, enabling ≥88% efficiency at 5V→3.3V/1.75A. |
| Quiescent Current | 2.8–4.5 mA (switching) / 30 nA (shutdown) - ensures ultra-low standby power for battery-backed systems. |
| Thermal Shutdown | 165°C activation / ~150°C recovery - protects against sustained overload or poor heatsinking without latch-up. |
Pinout & Package
LM2832XMYX/NOPB uses the 8-pin eMSOP-PowerPAD package (4.9 mm × 6.0 mm × 1.0 mm) with exposed die attach pad (DAP) for enhanced thermal performance. DAP must be soldered to system ground plane using ≥4 thermal vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIND | Power input supply | Main input path for 3V–5.5V; connects directly to input capacitor and shares node with VINA. |
| VINA | Control circuitry supply | Bias rail for internal logic; must be tied to VIND on PCB-no separate decoupling required. |
| EN | Enable control input | Active-high logic interface; threshold 1.8V (min), max leakage 100nA; floating prohibited. |
| GND (Pins 3,5,7) | Signal & power ground | Primary return for feedback network and power paths; bottom resistor of FB divider must locate adjacent to Pin 3. |
| FB | Feedback input | High-impedance (≤100nA bias) node sensing output voltage; trace must be short and noise-isolated. |
| SW | Switch node | Drives external inductor and catch diode; carries high di/dt; requires tight layout to minimize EMI. |
| DAP | Die attach pad | Thermal interface only-connects to ground plane for θJA = 80°C/W; not a functional GND connection. |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | 600 µs controlled output ramp prevents inrush current and stabilizes startup into large capacitive loads. |
| Current-mode PWM control | Enables inherent cycle-by-cycle current limiting and stable operation without external compensation components. |
| Overvoltage protection | Shuts off PMOS switch when FB exceeds 0.69V (15% above 0.6V reference), preventing damage to downstream ICs. |
| Undervoltage lockout | Disables regulator below 2.3V (typ) with 430mV hysteresis, eliminating brown-out oscillation during input ramp-up. |
| Thermal shutdown with hysteresis | Halts switching at 165°C junction temperature and resumes only after cooling to ~150°C, ensuring safe recovery. |
Applications
| Local 5V-to-3.3V Core Supply | USB-Powered Peripheral Regulation |
|---|---|
Use Scenario: Powering FPGA I/O banks or microcontroller peripherals from a host USB port. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5V USB power to stable 3.3V at up to 2.0A with fast load transient response. Use Value: Eliminates need for discrete LDO post-regulation; achieves 88% efficiency at full load with minimal board area. | Use Scenario: Providing regulated 3.3V to Wi-Fi modules or USB hubs in portable accessories. IC Role / Device Role / Timing Role: Standalone buck converter with enable control synchronized to USB enumeration signals. Use Value: 30nA shutdown current extends battery life; 1.6MHz switching avoids audible noise and simplifies EMI filtering. |
| HDD Head-Actuator Core Power | Set-Top Box SoC Rail |
Use Scenario: Delivering clean 3.3V to HDD actuator driver ICs requiring low-noise, high-current capability. IC Role / Device Role / Timing Role: High-efficiency local DC/DC converter placed near actuator controller to minimize IR drop and noise coupling. Use Value: 155mΩ RDS(ON) and ceramic-capacitor compatibility reduce output ripple to <20mVpp under dynamic loads. | Use Scenario: Generating 3.3V main SoC supply in cost-sensitive consumer STB designs. IC Role / Device Role / Timing Role: Fixed-frequency buck regulator operating from 5V front-end supply with integrated protection features. Use Value: Thermal shutdown and OVP eliminate need for external fault monitoring; eMSOP package fits dense STB layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832YMYX/NOPB | 0.55MHz switching frequency, higher minimum duty cycle (2%), lower quiescent current (2.8mA). | Better suited for higher input-to-output ratios (e.g., 5V→1.2V) where lower frequency improves efficiency and reduces EMI. | Select when optimizing for peak efficiency >90% at light loads or when using larger inductors is acceptable. |
| TPS62231DRVR | 3MHz switching, 1.2A output, 0.6V reference, smaller 2mm × 2mm WSON package. | Targeted at ultra-compact, lower-current applications; lacks thermal shutdown and OVP. | Choose for space-constrained designs needing <1.2A and where external protection can be added. |
Compared with LM2832YMYX/NOPB, the LM2832XMYX/NOPB trades lower light-load efficiency for superior transient response and smaller magnetics; versus TPS62231DRVR, it offers higher current, integrated protections, and proven thermal robustness in industrial environments.
Availability
LM2832XMYX/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, and HDD core power applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2832XMYX/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 DC-DC conversion solutions.
The LM2832 product line delivers compact, high-frequency step-down regulators optimized for space-constrained consumer and computing applications where efficiency, thermal performance, and integration of protection features are critical.
FAQ
What is the exact switching frequency of LM2832XMYX/NOPB and how is it set?
The LM2832XMYX/NOPB has a factory-trimmed fixed switching frequency of 1.6 MHz, internally generated and not user-adjustable. This value is guaranteed across –40°C to +125°C junction temperature and 3V–5.5V input range, with typical variation of ±10% over temperature per the datasheet's Figure 10. No external components are required to set or stabilize this frequency.
Can LM2832XMYX/NOPB operate with a 3.3V input to generate 3.3V output?
No-LM2832XMYX/NOPB cannot regulate 3.3V output from a 3.3V input because its minimum dropout is determined by RDS(ON) and duty cycle constraints. At VIN = 3.3V, the maximum achievable VOUT is approximately 2.8V due to PMOS conduction loss and minimum on-time limitations. For unity-gain operation, a low-dropout linear regulator or different topology is required.
What is the recommended output capacitor for LM2832XMYX/NOPB in a 5V-to-3.3V/2A design?
Texas Instruments specifies ≥22 µF total ceramic output capacitance for LM2832XMYX/NOPB, using X7R or X5R dielectrics. A typical implementation uses three 10 µF, 0805-size MLCCs in parallel (30 µF total) placed within 3 mm of the SW and GND pins. This meets ripple, transient, and stability requirements while leveraging the regulator's internal compensation.
Does LM2832XMYX/NOPB require an external catch diode?
Yes-LM2832XMYX/NOPB requires an external Schottky catch diode (e.g., RB050M-30, SS34) connected between SW and GND. The diode conducts during the PMOS off-time to maintain inductor current continuity. Its forward voltage must be ≤0.7V at peak current, and reverse voltage rating must exceed VIN + margin (≥7V).
How does the EN pin behavior affect system power sequencing with LM2832XMYX/NOPB?
The EN pin of LM2832XMYX/NOPB is active-high with 1.8V threshold and 100nA leakage. It must be driven by a clean logic signal or RC-delayed from VIN; floating EN causes undefined operation. When pulled low, the device enters 30nA shutdown mode with SW high-impedance and FB disabled-enabling precise power sequencing in multi-rail systems.
LM2832XMYX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 8-HVSSOP
LM2832XMYX/NOPB FAQ
1.How can I place an order for LM2832XMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832XMYX/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 LM2832XMYX/NOPB reliable?
The price and inventory of LM2832XMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832XMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832XMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832XMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832XMYX/NOPB?
LM2832XMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832XMYX/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 LM2832XMYX/NOPB?
For technical support, including LM2832XMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832XMYX/NOPB requirements.
6.How does Aetrix verify that LM2832XMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832XMYX/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 LM2832XMYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832XMYX/NOPB?
All LM2832XMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832XMYX/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 LM2832XMYX/NOPB part is unused and in its original packaging.
Return procedure for LM2832XMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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