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Texas Instruments LM2833ZSD/NOPB
- Part No.:
- LM2833ZSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM2833ZSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:2,254
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Product details
Overview
LM2833ZSD/NOPB from Texas Instruments is a monolithic 3.0 MHz synchronous step-down DC-DC regulator in a 10-pin WSON package, delivering up to 3.0A output current with 0.6V internal reference (±2%), 56 mΩ PMOS switch, and peak current-mode control. It operates from 3.0V–5.5V input and supports 0.6V–4.5V adjustable output voltage, targeting compact power rails in USB-powered devices and broadband modems.
For engineers reviewing the LM2833ZSD/NOPB datasheet, LM2833ZSD/NOPB pinout, LM2833ZSD/NOPB application, or LM2833ZSD/NOPB equivalent, key selection criteria include its fixed 3.0 MHz switching frequency, thermal shutdown at 165°C, 300 nA shutdown current, frequency foldback under low FB conditions, and compatibility with ceramic output capacitors for fast transient response.
Technical Context
The LM2833ZSD/NOPB implements peak current-mode control with internal compensation and a fixed 3.0 MHz oscillator, enabling stable regulation without external loop components. Its 56 mΩ PMOS switch and 30 ns minimum on-time support high-frequency operation down to 0.6V output across the full 3.0V–5.5V input range.
It integrates cycle-by-cycle current limiting (4.4 A typical), input UVLO (2.7 V rising / 2.35 V falling), output over-voltage protection (0.69 V FB threshold), and internal soft-start (600 µs ramp). Frequency foldback reduces switching frequency to 800 kHz when FB < 0.32 V, limiting dissipation during startup or overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 3.0 MHz - enables use of sub-1 µH inductors and small ceramic capacitors, minimizing PCB footprint. |
| Output Current | 3.0 A steady-state - supports high-current core rails in space-constrained applications like DSL modems. |
| Input Voltage Range | 3.0 V to 5.5 V - matches standard USB 5 V and regulated 3.3 V supply domains. |
| Feedback Reference | 0.600 V ±2% - sets precise output voltage via external resistor divider; line regulation 0.08%/V. |
| PMOS RDS(ON) | 56 mΩ (MSOP-PowerPAD) - confirmed for LM2833Z variant; enables >93% efficiency at mid-load. |
| Shutdown Current | 300 nA - ultra-low quiescent draw enables battery-backed or always-on standby modes. |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload; recovery occurs near 150°C. |
Pinout & Package
LM2833ZSD/NOPB uses a 3 mm × 3 mm, 10-pin WSON (Wettable Flank) package with exposed die attach pad (DAP) for thermal management. Pin 1 is VINC; pins 7–8 are SW; pins 9–10 are VIND; DAP must be soldered to PCB ground plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINC (Pin 1) | Bias supply input | Provides dedicated 3–5.5 V supply for internal control circuitry; requires local 0.1 µF bypass to SGND. |
| EN (Pin 2) | Enable control | Logic-high (>1.8 V) enables regulation; logic-low (<0.4 V) enters 300 nA shutdown; no internal pull-up. |
| SGND (Pin 3) | Analog ground | Reference for feedback network; place bottom resistor (R2) adjacent to minimize noise coupling. |
| NC (Pin 4) | No-connect | Internally unused; must be connected to PGND per TI layout guidelines. |
| FB (Pin 5) | Feedback sense | Monitors resistor-divider output; internal 0.6 V reference sets VOUT = 0.6 × (1 + R1/R2). |
| PGND (Pin 6) | Power ground return | Carries high di/dt switch current; connect directly to input/output capacitor grounds and DAP. |
| SW (Pins 7–8) | Switch node | Drives external inductor and catch diode; dual pins reduce parasitic inductance and improve thermal spreading. |
| VIND (Pins 9–10) | Main input supply | High-current VIN path; requires local 22 µF ceramic bypass to PGND near pins. |
| DAP | Die attach pad | Thermal interface only - must be soldered to solid copper thermal pad; not electrically functional. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0 MHz switching | Enables use of ≤1 µH inductors and 22 µF ceramic output capacitors, reducing solution size by >40% vs. 1.5 MHz variants. |
| Internal soft-start (600 µs) | Prevents input inrush and output overshoot during EN-triggered startup; eliminates need for external timing components. |
| Frequency foldback | Reduces switching frequency to 800 kHz when FB < 0.32 V, limiting peak switch current and junction temperature during short-circuit events. |
| Peak current-mode control | Provides inherent cycle-by-cycle current limiting (4.4 A typical) and stable transient response without external compensation. |
| Integrated 56 mΩ PMOS switch | Eliminates external high-side MOSFET; achieves >93% efficiency at 2 A/3.3 V out from 5 V in. |
Applications
| Multimedia Set Top Box | Broadband Communications |
|---|---|
Use Scenario: Powering SoC core voltage (1.2 V) and memory I/O (1.8 V) in compact STB enclosures with limited airflow. IC Role / Device Role / Timing Role: Primary buck regulator delivering 3.0 A at 1.2 V with fast load-step response to handle video decode bursts. Use Value: 3.0 MHz operation allows 0.47 µH inductor and 22 µF X7R MLCC, reducing total solution area to < 80 mm². | Use Scenario: Generating 3.3 V rail for Ethernet PHY and packet processor in DSL/cable modem designs. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter operating from 5 V USB or wall adapter input. Use Value: 300 nA shutdown current extends battery backup runtime; UVLO prevents brownout-induced resets. |
| Core Power in HDDs | USB Powered Devices |
Use Scenario: Supplying 1.8 V or 2.5 V spindle motor controller and servo ICs in portable external HDD enclosures. IC Role / Device Role / Timing Role: Compact, thermally robust DC-DC stage handling 2–3 A pulsed loads during spin-up and seek operations. Use Value: Thermal shutdown (165°C) and cycle-by-cycle current limit protect against motor stall faults without external sensing. | Use Scenario: Regulating 3.3 V or 1.8 V from 5 V USB port for portable test equipment, audio interfaces, or IoT gateways. IC Role / Device Role / Timing Role: Single-chip buck solution meeting USB power budget constraints and EMI limits. Use Value: Fixed 3.0 MHz frequency places switching harmonics above 100 MHz, easing FCC Class B compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2833XSD/NOPB | 1.5 MHz switching frequency; 58 mΩ RDS(ON); same package and pinout. | Better efficiency at light loads due to lower switching loss; larger inductor required (≥1 µH). | Select when board space allows larger magnetics and priority is light-load efficiency over footprint. |
| TPS6286418RTER | 3.0 MHz, 2.5 A, 0.6 V reference, but uses integrated inductor in 2.0 mm × 2.5 mm QFN. | Ultra-compact module form factor; no external inductor or diode needed; higher cost per watt. | Select when design schedule favors turnkey solution and BOM count reduction outweighs cost sensitivity. |
Compared with LM2833XSD/NOPB, the LM2833ZSD/NOPB trades marginally higher conduction loss for significantly smaller passive components; versus TPS6286418RTER, it offers lower system cost and thermal flexibility at the expense of layout effort and component count.
Availability
LM2833ZSD/NOPB is available at Aetrix Electronics and suitable for multimedia set top boxes, broadband communications equipment, and USB-powered devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2833ZSD/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-efficiency DC-DC conversion.
The LM2833 product line delivers compact, high-frequency buck regulators optimized for space-constrained consumer and communications applications where 3.0A output, minimal external components, and thermal robustness are critical.
FAQ
What is the switching frequency of the LM2833ZSD/NOPB?
The LM2833ZSD/NOPB has a fixed internal switching frequency of 3.0 MHz, with typical variation between 2.25 MHz and 3.75 MHz across temperature and input voltage. This high frequency enables use of sub-microhenry inductors and small ceramic capacitors, reducing overall solution size compared to lower-frequency alternatives.
Does the LM2833ZSD/NOPB require external compensation components?
No, the LM2833ZSD/NOPB features internally compensated peak current-mode control, eliminating the need for external compensation networks. This simplifies design, reduces BOM count, and ensures stable operation across its full load and input voltage range without tuning.
What is the maximum output current capability of the LM2833ZSD/NOPB?
The LM2833ZSD/NOPB delivers up to 3.0 A of steady-state output current under typical thermal conditions (TA = 25°C, 4-layer JEDEC board). Actual achievable current depends on layout, ambient temperature, and airflow; thermal shutdown activates at ~165°C junction temperature to prevent damage.
How does the LM2833ZSD/NOPB handle short-circuit conditions?
Under short-circuit, the LM2833ZSD/NOPB activates frequency foldback (reducing switching frequency to 800 kHz) and cycle-by-cycle current limiting (4.4 A typical), limiting power dissipation. If junction temperature exceeds 165°C, thermal shutdown disables the switch until temperature falls to ~150°C.
Can the LM2833ZSD/NOPB operate from a 3.3 V input to generate 1.8 V output?
Yes, the LM2833ZSD/NOPB supports input voltages from 3.0 V to 5.5 V and output voltages from 0.6 V to 4.5 V. At 3.3 V input and 1.8 V output, it achieves >90% efficiency at 2 A load with appropriate inductor and ceramic capacitor selection per TI's design guidelines.
LM2833ZSD/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-WFDFN 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:
- 3A
- Frequency - Switching:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (3x3)
LM2833ZSD/NOPB FAQ
1.How can I place an order for LM2833ZSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2833ZSD/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 LM2833ZSD/NOPB reliable?
The price and inventory of LM2833ZSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2833ZSD/NOPB is usually 5 days.
3.What payment methods are accepted for LM2833ZSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2833ZSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2833ZSD/NOPB?
LM2833ZSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2833ZSD/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 LM2833ZSD/NOPB?
For technical support, including LM2833ZSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2833ZSD/NOPB requirements.
6.How does Aetrix verify that LM2833ZSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2833ZSD/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 LM2833ZSD/NOPB meets industry standards.
7.What is the process for return or replacement of LM2833ZSD/NOPB?
All LM2833ZSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2833ZSD/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 LM2833ZSD/NOPB part is unused and in its original packaging.
Return procedure for LM2833ZSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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