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Texas Instruments LM2833XSD/NOPB
- Part No.:
- LM2833XSD/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-WFDFN Exposed Pad
- Datasheet:
-
LM2833XSD/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 10SON
- Quantity:
- Payment:
- Shipping:
Inventory:1,102
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Product details
Overview
LM2833XSD/NOPB from Texas Instruments is a monolithic 1.5MHz, 3.0A synchronous step-down DC-DC regulator in a 10-pin WSON package with 56 mΩ internal PMOS switch, 0.6V ±2% reference, and peak current-mode control. It delivers regulated output from 0.6V to 4.5V across 3.0V–5.5V input, enabling compact power supplies for USB-powered devices and set-top boxes.
For engineers reviewing the LM2833XSD/NOPB datasheet, LM2833XSD/NOPB pinout, LM2833XSD/NOPB application, or LM2833XSD/NOPB equivalent, key selection criteria include its fixed 1.5MHz switching frequency, 30ns minimum on-time, 300nA shutdown current, thermal shutdown at 165°C, and internal soft-start with 600µs ramp time.
Technical Context
The LM2833XSD/NOPB implements peak current-mode control with internal slope compensation and a fixed 1.5MHz oscillator, supporting stable regulation down to 0.6V output. Its 56 mΩ PMOS switch and 3.4A cycle-by-cycle current limit enable 3.0A steady-state operation with up to 93% efficiency at mid-load.
It integrates UVLO (2.7V rising / 2.35V falling), frequency foldback (triggered below 0.32V FB), output over-voltage protection (0.69V threshold), and thermal shutdown with 15°C hysteresis - all without external components beyond feedback resistors, inductor, and input/output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.5 MHz - enables use of sub-2.2 µH inductors and 22 µF ceramic output caps in space-constrained layouts |
| Output Current | 3.0 A steady-state - supports core rail requirements for multimedia SoCs and HDD controllers |
| Input Voltage Range | 3.0 V to 5.5 V - compatible with single-cell Li-ion, USB 5V, and 3.3V/5V system rails |
| Feedback Reference | 0.600 V ±2% - sets precise output voltage via external resistor divider; line regulation <0.08%/V |
| Quiescent Current | 5 mA typical (switching), 300 nA (shutdown) - minimizes standby power in always-on USB peripherals |
| Thermal Shutdown | 165°C junction, 15°C hysteresis - protects against sustained overload or poor PCB thermal design |
| Min On-Time | 30 ns - supports high duty-cycle operation at low VIN/VOUT ratios (e.g., 3.3V out from 3.6V input) |
Pinout & Package
LM2833XSD/NOPB uses a 3 mm × 3 mm, 10-pin WSON (Wettable Flank) package with exposed die attach pad (DAP) for thermal dissipation. Pin 1 is VINC; pins 7–8 are SW; pins 9–10 are VIND; pin 4 is NC (must connect to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINC (Pin 1) | Bias supply input | Provides internal control circuitry power; requires local 0.1 µF bypass to SGND |
| EN (Pin 2) | Enable control | Logic-high (>1.8 V) enables regulation; <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 load regulation error |
| NC (Pin 4) | No-connect | Internally unused; must be tied to PGND for mechanical stability and EMI control |
| FB (Pin 5) | Feedback input | Connects to resistor divider; senses output voltage; 0.1 nA bias current enables high-R dividers |
| PGND (Pin 6) | Power ground return | Carries high di/dt switch current; connect directly to DAP and input/output cap grounds |
| SW (Pins 7–8) | Switch node | Drives inductor and catch diode; requires short, low-inductance routing to minimize ringing |
| VIND (Pins 9–10) | Main power input | High-current VIN path; bypass locally with ≥10 µF ceramic cap to PGND |
| DAP | Die attach pad | Thermal interface to PCB copper; must be soldered to solid thermal pad with ≥4 thermal vias |
Key Features
| Feature | Design Value |
|---|---|
| Internal 56 mΩ PMOS switch | Enables 3.0A output without external MOSFETs; reduces BOM count and layout area vs. controller+MOS solutions |
| 1.5MHz fixed-frequency PWM | Permits use of 1.0–2.2 µH shielded inductors and avoids AM radio band interference |
| Internal soft-start (600 µs) | Prevents input inrush and output overshoot during power-up; eliminates need for external timing capacitor |
| Frequency foldback (400 kHz) | Reduces switch stress and power dissipation during startup, overload, or short-circuit conditions |
| 0.6V ±2% reference over temp | Ensures tight output accuracy across –40°C to +125°C ambient without trimming or calibration |
Applications
| Multimedia Set Top Box | USB-Powered Devices |
|---|---|
Use Scenario: Powering video decoder SoC and HDMI PHY from 5V USB input. IC Role / Device Role / Timing Role: Primary 3.3V/1.2V core and I/O rail regulator with fast transient response to burst video processing loads. Use Value: 93% efficiency at 2A and 30ns min-on-time prevent thermal throttling during 4K decode bursts. | Use Scenario: Compact portable monitor powered solely via USB-C PD (5V). IC Role / Device Role / Timing Role: Single-chip 3.3V system rail generator with ultra-low shutdown current. Use Value: 300nA shutdown current extends battery life in sleep mode; WSON package fits <100 mm² PCB area. |
| HDD Core Power | Data Acquisition Systems |
Use Scenario: Supplying 1.8V spindle motor driver and 3.3V servo controller in external 2.5" HDD enclosure. IC Role / Device Role / Timing Role: High-current buck regulator handling rapid load steps during seek/write operations. Use Value: Cycle-by-cycle current limit (4.4A) and thermal shutdown protect against motor stall faults. | Use Scenario: Powering 16-bit ADC, microcontroller, and isolated RS-485 transceiver in industrial sensor node. IC Role / Device Role / Timing Role: Precision 3.0V analog rail generator with low noise and tight line/load regulation. Use Value: 0.6V ±2% reference and <0.08%/V line regulation ensure <±1 LSB error across full input range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2833ZSD/NOPB | 3.0MHz switching frequency, 58 mΩ RDS(ON), 80% max duty cycle | Better suited for ultra-compact designs requiring <1 µH inductors; lower max duty cycle limits low-VIN operation | Select when board area is critical and input voltage stays >3.6V; verify loop stability with smaller output capacitance |
| TPS6286418RTER | 2.5V–5.5V input, 1.8V fixed output, 4A, 2.25MHz, integrated inductor | Module-level solution with higher integration but larger footprint and fixed output; no external feedback | Choose for fastest time-to-market where 1.8V fixed output suffices and board space allows 2.1mm × 1.9mm module |
Compared with LM2833XSD/NOPB, LM2833ZSD/NOPB trades lower RDS(ON) tolerance and reduced duty cycle for higher frequency and smaller magnetics, while TPS6286418RTER replaces discrete design effort with a pre-validated module-ideal for prototyping but less flexible for custom voltage or thermal optimization.
Availability
LM2833XSD/NOPB is available at Aetrix Electronics and suitable for multimedia set-top boxes, USB-powered peripherals, and HDD core power applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM2833XSD/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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The LM2833 family was designed as a high-density, easy-to-use synchronous buck regulator platform targeting space-constrained, medium-current applications where minimal external components and predictable thermal behavior are essential.
FAQ
What is the maximum output current supported by the LM2833XSD/NOPB?
The LM2833XSD/NOPB supports a steady-state output current of 3.0A under typical thermal conditions (θJA = 53°C/W, 4-layer JEDEC board). Peak current capability reaches 4.4A due to cycle-by-cycle limiting, but continuous operation above 3.0A requires careful thermal design - including DAP soldering to a ≥1 cm² copper pad with ≥4 thermal vias - to maintain junction temperature below 125°C.
Does the LM2833XSD/NOPB require external compensation components?
No, the LM2833XSD/NOPB features internally compensated peak current-mode control. No external compensation network is needed - only the feedback resistor divider (R1/R2), input/output capacitors, inductor, and catch diode are required for basic operation. This simplifies design, reduces BOM count, and ensures consistent loop stability across operating conditions without tuning.
Can the LM2833XSD/NOPB operate with an input voltage below 3.0V?
No. The LM2833XSD/NOPB has a guaranteed operating input range of 3.0V to 5.5V per its Absolute Maximum and Operating Ratings. Input voltage below 3.0V triggers undervoltage lockout (UVLO), disabling regulation. The UVLO rising threshold is 2.70V typical, with 350mV hysteresis - so the device remains off until VIN exceeds ~2.7V and stays active until VIN drops below ~2.35V.
What is the purpose of the VINC pin on the LM2833XSD/NOPB?
The VINC pin on the LM2833XSD/NOPB supplies bias power to the internal control circuitry, independent of the main power path (VIND). It must be bypassed locally to SGND with a 0.1 µF ceramic capacitor. Separating bias and power inputs improves PSRR and prevents noise coupling from high-di/dt VIND transients into the error amplifier and oscillator circuits.
How does frequency foldback function in the LM2833XSD/NOPB during startup?
During startup, if the FB pin voltage remains below 0.32V (e.g., due to heavy load or slow-rising output), the LM2833XSD/NOPB reduces switching frequency from 1.5MHz to 400kHz. This foldback lowers peak switch current and power dissipation, preventing thermal stress or current-limit tripping before regulation is established - a key safeguard for high-capacitance or high-current startup scenarios.
LM2833XSD/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:
- 1.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-SON (3x3)
LM2833XSD/NOPB FAQ
1.How can I place an order for LM2833XSD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2833XSD/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 LM2833XSD/NOPB reliable?
The price and inventory of LM2833XSD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2833XSD/NOPB is usually 5 days.
3.What payment methods are accepted for LM2833XSD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2833XSD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2833XSD/NOPB?
LM2833XSD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2833XSD/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 LM2833XSD/NOPB?
For technical support, including LM2833XSD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2833XSD/NOPB requirements.
6.How does Aetrix verify that LM2833XSD/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2833XSD/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 LM2833XSD/NOPB meets industry standards.
7.What is the process for return or replacement of LM2833XSD/NOPB?
All LM2833XSD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2833XSD/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 LM2833XSD/NOPB part is unused and in its original packaging.
Return procedure for LM2833XSD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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