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Texas Instruments LM2832ZSDX/NOPB
- Part No.:
- LM2832ZSDX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 6-WDFN Exposed Pad
- Datasheet:
-
LM2832ZSDX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 2A 6WSON
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2832ZSDX/NOPB from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in a 6-pin WSON package with exposed thermal pad. It delivers 2.0A output current at 3.3V from a 5V input, features a 3.0MHz switching frequency, 0.6V internal reference (±2%), and integrated 150mΩ PMOS switch for compact local power conversion in space-constrained applications.
For engineers reviewing the LM2832ZSDX/NOPB datasheet, LM2832ZSDX/NOPB pinout, LM2832ZSDX/NOPB application, or LM2832ZSDX/NOPB equivalent, key selection considerations include its fixed 3.0MHz operation, thermal shutdown at 165°C, 30nA shutdown current, current-mode control architecture, and compatibility with ceramic output capacitors for low-ESR, high-transient-response designs.
Technical Context
The LM2832ZSDX/NOPB implements current-mode PWM control with internal compensation, enabling stable regulation across 3.0V–5.5V input and 0.6V–4.5V output ranges. Its 3.0MHz switching frequency supports ultra-small external inductors and chip capacitors while maintaining ≥93% peak efficiency at 2.0A load.
It integrates soft-start (600µs ramp), overvoltage protection (15% above VREF), undervoltage lockout (2.73V turn-on, 2.3V turn-off with 430mV hysteresis), and cycle-by-cycle current limiting (3.25A typical). Thermal shutdown activates at 165°C with ~15°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz - Enables use of ≤1.0 µH inductors and 22 µF ceramic output capacitors, minimizing PCB footprint. |
| Output Current | 2.0 A - Sustained continuous load capability with internal 150 mΩ PMOS switch and thermal shutdown protection. |
| Feedback Voltage | 0.600 V ±2% - Sets regulated output via external resistor divider; enables precise 3.3V, 1.8V, or other voltages down to 0.6V. |
| Input Voltage Range | 3.0 V to 5.5 V - Matches standard USB, 3.3V rail, and 5V logic supply domains without pre-regulation. |
| Quiescent Current | 4.3–6.5 mA (active), 30 nA (shutdown) - Minimizes standby power loss in battery-backed or always-on systems. |
| Thermal Shutdown | 165°C activation - Protects device under overload or poor heatsinking; resumes operation after junction cools to ~150°C. |
| UVLO Threshold | 2.73 V (rising), 2.3 V (falling) - Prevents erratic startup during brown-out; 430 mV hysteresis ensures clean enable/disable transitions. |
Pinout & Package
The LM2832ZSDX/NOPB uses a 6-pin WSON (3.0 mm × 3.0 mm) package with an exposed die attach pad (DAP) for enhanced thermal dissipation. The DAP must be soldered to a PCB ground plane using ≥4 thermal vias for optimal thermal performance (θJA = 80°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB | Feedback input | High-impedance node sensing output voltage via resistor divider; regulates output to 0.6V reference. |
| GND | Signal and power ground | Primary return path for feedback network and internal circuitry; place bottom resistor of divider adjacent to this pin. |
| SW | Switch node | Connects to inductor and Schottky catch diode; carries high dv/dt switching waveform; requires tight layout. |
| VIND | Main power input | Supplies internal PMOS switch; requires local 22 µF ceramic input capacitor with low ESL. |
| VINA | Control circuitry supply | Bias voltage for internal logic; must be tied directly to VIND on PCB to ensure stable reference and UVLO operation. |
| EN | Enable control | Logic-high active; 1.8V threshold; floating or >VINA+0.3V prohibited; enables ultra-low 30nA shutdown mode. |
Key Features
| Feature | Design Value |
|---|---|
| 3.0 MHz fixed-frequency PWM | Enables <1.0 µH inductors and eliminates audible noise; supports fast transient response with minimal output capacitance. |
| Integrated 150 mΩ PMOS switch | Eliminates external high-side FET; reduces BOM count and layout complexity while delivering 2.0A continuous output. |
| Internal soft-start (600 µs) | Controls output voltage ramp rate to limit inrush current into downstream capacitors and prevent system reset. |
| Current-mode control + internal compensation | Provides inherent loop stability across full load and input range without external compensation components. |
| Output overvoltage protection | Disables switch if FB exceeds 0.69V (15% above 0.6V), preventing damage to connected 3.3V or 1.8V ICs during fault conditions. |
Applications
| Local 5V-to-3.3V Core Conversion | USB-Powered Portable Devices |
|---|---|
Use Scenario: Converting 5V USB supply to stable 3.3V for microcontroller core logic in handheld test equipment. IC Role / Device Role / Timing Role: Primary step-down regulator providing regulated 3.3V/2.0A with fast load transient response to handle MCU burst activity. Use Value: 3.0MHz switching allows 1.0 µH inductor and 22 µF X7R ceramic capacitor, reducing solution size by >40% vs. 500kHz alternatives. | Use Scenario: Powering FPGA I/O banks and interface logic in bus-powered USB peripherals with strict thermal limits. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering 3.3V at up to 2.0A with 30nA shutdown current to extend battery life in sleep mode. Use Value: Internal 150mΩ PMOS and current-mode control achieve >90% efficiency at 1A load, minimizing self-heating in sealed enclosures. |
| HDD Preamp & Servo Circuitry | DSL/FTTH Modem Power Rails |
Use Scenario: Generating clean 3.3V for hard disk drive read/write channel analog front-end and servo control ICs. IC Role / Device Role / Timing Role: Low-noise, thermally robust DC-DC regulator supplying critical analog circuitry with tight voltage tolerance (±2%) and low ripple. Use Value: 0.6V reference accuracy and ceramic-capacitor compatibility yield <10mVpp output ripple, meeting HDD analog signal integrity requirements. | Use Scenario: Providing 3.3V bias for DSL line drivers and Ethernet PHYs in compact residential gateways. IC Role / Device Role / Timing Role: Compact, high-frequency buck regulator supporting multiple 3.3V rails with independent enable control per subsystem. Use Value: EN pin logic-level control and 30nA shutdown allow selective powering of modem sections, reducing idle power by >95%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2832YSDE/NOPB | 0.55MHz switching frequency; higher minimum duty cycle (2%); lower quiescent current (2.8–4.5mA active). | Better light-load efficiency; suited for cost-sensitive, thermally relaxed designs where larger inductors/caps are acceptable. | Select when board area is less constrained and 550kHz operation simplifies EMI filtering. |
| TPS62231DRVR | 3.0MHz, 2A, 0.6V reference, but uses synchronous rectification (no external diode) and has different pinout (6-pin WSON, no VINA pin). | Higher efficiency at mid-to-light loads due to synchronous FET; eliminates catch diode BOM item and layout complexity. | Choose for highest efficiency across full load range and simplified bill-of-materials, accepting different feedback configuration. |
Compared with LM2832YSDE/NOPB, the LM2832ZSDX/NOPB trades higher active quiescent current for significantly smaller magnetics and tighter transient response; versus TPS62231DRVR, it retains asynchronous operation for lower cost and simpler diode selection but requires external Schottky diode and separate VINA tie.
Availability
LM2832ZSDX/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, HDD servo circuits, DSL modems, and local 5V-to-3.3V core conversion requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LM2832ZSDX/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 targeting space-constrained applications such as portable electronics, storage systems, and broadband communications equipment where efficiency, thermal performance, and small solution size are critical.
FAQ
What is the switching frequency of the LM2832ZSDX/NOPB?
The LM2832ZSDX/NOPB operates at a fixed 3.0 MHz switching frequency, as confirmed in the Electrical Characteristics table (FSW = 2.25–3.75 MHz, typical 3.0 MHz). This high frequency enables use of sub-1.0 µH inductors and low-ESR ceramic capacitors, minimizing total solution size while maintaining high efficiency and fast transient response across its 3.0V–5.5V input range.
Does the LM2832ZSDX/NOPB require an external catch diode?
Yes, the LM2832ZSDX/NOPB requires an external Schottky catch diode connected between SW and GND. It uses an asynchronous buck topology with an integrated PMOS high-side switch but no synchronous rectifier. A low-forward-voltage Schottky diode (e.g., 0.45V max at rated current) is recommended to maximize efficiency and minimize thermal stress, especially at 2.0A output.
How is the output voltage set on the LM2832ZSDX/NOPB?
The output voltage of the LM2832ZSDX/NOPB is set using a resistor divider from VO to FB to GND, based on the internal 0.600V ±2% reference. For 3.3V output, R2 = 10kΩ and R1 ≈ 45kΩ satisfies VOUT = 0.6 × (1 + R1/R2). The FB pin has low bias current (0.1–100nA), so resistor values should balance noise immunity and power loss-10kΩ–100kΩ is typical for R2.
What thermal management is required for the LM2832ZSDX/NOPB at 2.0A?
At 2.0A output and 5V input, the LM2832ZSDX/NOPB dissipates ~339mW internally (per TI's Application Note SNVS455A). To maintain safe junction temperature (<125°C), the 6-pin WSON package requires its exposed DAP to be soldered to a solid GND plane with ≥4 thermal vias. With proper layout, θJA is 80°C/W, yielding ~27°C rise above ambient-well within limits for most industrial environments.
Is the LM2832ZSDX/NOPB pin-compatible with other LM2832 variants?
Yes, the LM2832ZSDX/NOPB shares identical 6-pin WSON pinout and footprint with LM2832X and LM2832Y variants (e.g., LM2832YSDE/NOPB). All share the same VIND, VINA, EN, FB, SW, GND assignments and DAP configuration. Only the switching frequency and quiescent current differ-allowing drop-in replacement where timing and efficiency requirements align.
LM2832ZSDX/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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-WSON (3x3)
LM2832ZSDX/NOPB FAQ
1.How can I place an order for LM2832ZSDX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2832ZSDX/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 LM2832ZSDX/NOPB reliable?
The price and inventory of LM2832ZSDX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2832ZSDX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2832ZSDX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2832ZSDX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2832ZSDX/NOPB?
LM2832ZSDX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2832ZSDX/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 LM2832ZSDX/NOPB?
For technical support, including LM2832ZSDX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2832ZSDX/NOPB requirements.
6.How does Aetrix verify that LM2832ZSDX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2832ZSDX/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 LM2832ZSDX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2832ZSDX/NOPB?
All LM2832ZSDX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2832ZSDX/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 LM2832ZSDX/NOPB part is unused and in its original packaging.
Return procedure for LM2832ZSDX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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