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Texas Instruments LM2832XSDX/NOPB
- Part No.:
- LM2832XSDX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2832XSDX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
Inventory:4,457
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Product details
Overview
LM2832XSDX/NOPB from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator with an internal 150 mΩ PMOS switch, delivering up to 2.0A output current at 3.3V from a 5V input. It operates at a fixed 1.6 MHz switching frequency, features 0.6V ±2% internal reference, current-mode control, and integrated soft-start for inrush current limiting - deployed in compact USB-powered devices and HDD core power supplies.
For engineers reviewing the LM2832XSDX/NOPB datasheet, LM2832XSDX/NOPB pinout, LM2832XSDX/NOPB application, or LM2832XSDX/NOPB equivalent, key selection criteria include verified 1.6 MHz operation, WSON-6 package thermal performance (θJA = 80°C/W), 3.0–5.5V input range, 0.6V feedback threshold, and confirmed 30 nA shutdown current - all validated per SNVS455A Rev. APRIL 2013.
Technical Context
The LM2832XSDX/NOPB implements constant-frequency current-mode PWM control with internal compensation, enabling stable regulation across 3V–5.5V input and 0.6V–4.5V output ranges. Its 30 ns minimum on-time supports high duty-cycle operation down to 0.6V output while maintaining 1.6 MHz switching.
It integrates undervoltage lockout (UVLO rising threshold 2.73V, hysteresis 0.43V), thermal shutdown (165°C trip, 150°C recovery), overvoltage protection (15% above VFB), and cycle-by-cycle current limit (2.4A min, 3.25A typ) - all implemented without external components beyond feedback resistors and passive LC network.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6 MHz - enables use of sub-2.2 µH inductors and 22 µF ceramic capacitors, minimizing PCB footprint. |
| Output Current | 2.0 A - sustained load capability with internal 150 mΩ PMOS switch; peak switch current limit ≥2.4 A ensures robustness. |
| Input Voltage Range | 3.0 V to 5.5 V - compatible with single-cell Li-ion, USB 5V, and regulated 3.3V/5V rails. |
| Feedback Reference | 0.600 V ±2% - sets output voltage via resistor divider; line regulation ≤0.02%/V ensures stability across input range. |
| Quiescent Current | 2.8–4.5 mA (switching), 30 nA (shutdown) - enables ultra-low standby power in battery-backed systems. |
| Thermal Resistance | θJA = 80°C/W, θJC = 18°C/W - requires exposed pad soldered to ground plane for reliable 2A operation at +125°C ambient. |
| Shutdown Threshold | VEN < 0.4 V - logic-compatible enable pin with 100 nA bias current; prevents floating-input misoperation. |
Pinout & Package
LM2832XSDX/NOPB uses the 6-pin WSON (3 mm × 3 mm, 0.65 mm pitch) package with wettable flank leads and thermally enhanced exposed die attach pad (DAP). The DAP must be soldered to a dedicated PCB ground plane using ≥4 thermal vias for effective heat dissipation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 FB | Feedback input | High-impedance node (IB ≤100 nA) sensing output voltage via resistor divider; trace must be short and noise-shielded. |
| 2 GND | Signal & power ground | Primary return path for feedback network and internal circuitry; connect bottom resistor of divider directly here. |
| 3 SW | Switch node | Drives external inductor and catch diode; high dv/dt node requiring minimized loop area and tight layout. |
| 4 VIND | Main power input | Supplies internal PMOS switch; requires local 22 µF ceramic capacitor with low ESL placed adjacent to pin. |
| 5 VINA | Control supply | Bias rail for internal circuitry; must be tied to VIND on PCB - no separate decoupling needed. |
| 6 EN | Enable control | Active-high logic input; 0.4 V threshold ensures compatibility with 1.8V/3.3V GPIO; 30 nA shutdown current minimizes system leakage. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 150 mΩ PMOS switch | Eliminates external high-side FET and driver, reducing BOM count and layout complexity for 2A buck converters. |
| 1.6 MHz fixed-frequency operation | Enables full ceramic solution with 1.0–2.2 µH inductors and 22 µF X7R MLCCs - no electrolytics required. |
| Internal soft-start (600 µs ramp) | Prevents inrush current into output capacitance during power-up, avoiding input rail droop and system reset. |
| Current-mode PWM control | Provides inherent cycle-by-cycle current limiting, fast transient response, and simplified loop compensation. |
| Overvoltage protection (OVP) | Disables switch when FB exceeds 15% above 0.6V reference, protecting downstream 3.3V logic from fault-induced overvoltage. |
Applications
| USB-Powered Devices | HDD Core Power |
|---|---|
Use Scenario: Portable SSD enclosures powered solely from USB 5V bus delivering regulated 3.3V to NAND flash and controller ICs. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5V USB to 3.3V VCC, operating continuously at 1.5–2.0A with minimal thermal rise. Use Value: 1.6 MHz switching allows compact 1.5 µH shielded inductor and 22 µF X7R output cap - meeting USB form factor constraints. | Use Scenario: 2.5-inch HDD servo and spindle motor controller requiring clean, efficient 3.3V core supply from 5V SATA rail. IC Role / Device Role / Timing Role: Local point-of-load converter supplying 3.3V @ 2.0A to ASIC and motor driver ICs with fast load-step response. Use Value: Current-mode control delivers <5% output deviation during 1A load transients; thermal shutdown protects against stalled-motor faults. |
| Set-Top Box SoC Rails | DSL Modem PHY Power |
Use Scenario: Low-power STB media processors needing tightly regulated 3.3V I/O and memory interface supply from 5V main rail. IC Role / Device Role / Timing Role: Secondary buck regulator providing low-noise 3.3V for DDR I/O and HDMI PHY, synchronized to system clock domain. Use Value: 0.6V reference tolerance (±2%) and 0.02%/V line regulation ensure stable 3.3V output across varying 5V input ripple and load. | Use Scenario: DSL line card powering ADSL2+ analog front-end (AFE) and digital signal processor (DSP) from 5V backplane. IC Role / Device Role / Timing Role: Dedicated 3.3V supply for sensitive AFE circuitry, requiring low EMI and high PSRR under burst-mode data traffic. Use Value: High-frequency operation (1.6 MHz) shifts switching noise above audio band; ceramic output caps suppress high-frequency ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2833XSDX/NOPB | 3.0 MHz switching, 3A output, same WSON-6 package; higher RDS(ON) (180 mΩ) and quiescent current (4.3–6.5 mA). | Better suited for space-constrained designs needing >2A or faster transient response; less efficient at 2A continuous load. | Select LM2833XSDX/NOPB only if 3.0 MHz operation or 3A headroom is required; otherwise LM2832XSDX/NOPB offers superior efficiency at 2A. |
| TPS62231DRVR | 3 MHz, 600 mA max, 2x2mm WSON-6; lower current rating but tighter VREF accuracy (±1%) and higher light-load efficiency. | Targeted at ultra-low-power microcontrollers and sensors - not suitable for 2A loads. | Choose TPS62231DRVR only for sub-600 mA applications where ultra-low IQ (<10 µA) and precision 3.3V regulation are critical. |
Compared with LM2833XSDX/NOPB, LM2832XSDX/NOPB provides higher efficiency at 2A due to lower RDS(ON) and optimized 1.6 MHz operation; versus TPS62231DRVR, it delivers triple the output current but trades off light-load IQ and reference accuracy - making LM2832XSDX/NOPB the optimal choice for cost-sensitive, medium-power USB/HDD applications.
Availability
LM2832XSDX/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, HDD core power supplies, and set-top box SoC rails requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2832XSDX/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.
The LM2832 product line delivers compact, high-frequency step-down regulators targeting space-constrained, medium-current applications such as portable storage, broadband modems, and consumer multimedia devices - emphasizing ease of use, minimal external components, and robust thermal performance.
FAQ
What is the maximum output current supported by the LM2832XSDX/NOPB?
The LM2832XSDX/NOPB is rated for continuous 2.0A output current under thermal limits defined in SNVS455A. Its internal 150 mΩ PMOS switch and 2.4A minimum current limit (typ. 3.25A) support this load when used with proper PCB thermal design - including soldered DAP and ≥4 thermal vias. Derating applies above +85°C ambient.
Does the LM2832XSDX/NOPB require external compensation components?
No, the LM2832XSDX/NOPB features fully internal compensation optimized for current-mode control. Only two external resistors (R1, R2) for feedback and standard input/output capacitors (22 µF ceramic each) plus inductor and Schottky diode are required - eliminating loop compensation calculations and stability tuning.
What package type does the LM2832XSDX/NOPB use, and how is thermal performance achieved?
The LM2832XSDX/NOPB uses the 6-pin WSON (3 mm × 3 mm) package with exposed die attach pad (DAP). Thermal performance relies on soldering the DAP directly to a solid PCB ground plane using ≥4 thermal vias - achieving θJA = 80°C/W and enabling full 2A operation at +125°C junction temperature per datasheet specifications.
Can the LM2832XSDX/NOPB operate with a 3.3V input to generate 3.3V output?
No - the LM2832XSDX/NOPB is a step-down (buck) regulator requiring VIN > VOUT + VD + IOUT×RDS(ON). With 3.3V input, minimum achievable output is ~2.8V (accounting for diode drop and switch loss). For 3.3V-to-3.3V regulation, a low-dropout linear regulator or buck-boost topology is required instead.
What is the purpose of the VINA pin on the LM2832XSDX/NOPB?
The VINA pin supplies bias voltage to the internal control circuitry (error amplifier, oscillator, logic). Per SNVS455A, VINA must be connected directly to VIND on the PCB - no separate decoupling or filtering is needed. This dual-rail configuration isolates switch noise from sensitive analog blocks, improving regulation accuracy and noise immunity.
LM2832XSDX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-WDFN 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:
- 6-WSON (3x3)
LM2832XSDX/NOPB FAQ
1.How can I place an order for LM2832XSDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832XSDX/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 LM2832XSDX/NOPB reliable?
The price and inventory of LM2832XSDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832XSDX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832XSDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832XSDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832XSDX/NOPB?
LM2832XSDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832XSDX/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 LM2832XSDX/NOPB?
For technical support, including LM2832XSDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832XSDX/NOPB requirements.
6.How does Aetrix verify that LM2832XSDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832XSDX/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 LM2832XSDX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832XSDX/NOPB?
All LM2832XSDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832XSDX/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 LM2832XSDX/NOPB part is unused and in its original packaging.
Return procedure for LM2832XSDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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