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Texas Instruments LM2833XMYX/NOPB
- Part No.:
- LM2833XMYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2833XMYX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,654
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Product details
Overview
LM2833XMYX/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 operates from 3.0V to 5.5V input and delivers adjustable output from 0.6V to 4.5V, targeting compact power rails in USB-powered devices and set-top boxes.
For engineers reviewing the LM2833XMYX/NOPB datasheet, LM2833XMYX/NOPB pinout, LM2833XMYX/NOPB application, or LM2833XMYX/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 for controlled ramp-up.
Technical Context
The LM2833XMYX/NOPB implements peak current-mode control with internally compensated loop and fixed 1.5MHz oscillator, enabling stable regulation without external compensation components. Its 30ns minimum on-time supports high duty-cycle operation down to 0.6V output across the full 3V–5.5V input range.
It integrates cycle-by-cycle current limiting (4.4A typical), frequency foldback (triggered below 0.32V FB), UVLO (2.7V rising/2.35V falling), and output over-voltage protection (0.69V FB threshold), all coordinated through a single BiCMOS control block with 56 mΩ PMOS switch.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.5 MHz - enables use of sub-2.2 µH inductors and low-ESR ceramic capacitors for minimal PCB footprint |
| Max Output Current | 3.0 A steady-state - supports core logic rails in HDDs and broadband modems without external pass devices |
| Input Voltage Range | 3.0 V to 5.5 V - matches standard USB 5V and Li-ion battery systems with margin for dropout |
| Feedback Reference | 0.600 V ±2% - sets precise output voltage via external resistor divider; line regulation <0.08%/V |
| Quiescent Current | 5 mA (switching), 300 nA (shutdown) - enables ultra-low-power standby in always-on USB peripherals |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload while allowing recovery at ~150°C |
| Min On-Time | 30 ns - ensures regulation stability at high input-to-output ratios (e.g., 5V→0.6V, D ≈ 12%) |
Pinout & Package
LM2833XMYX/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 be grounded).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINC (Pin 1) | Bias supply input | Provides dedicated 3V–5.5V rail for internal control circuitry; 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 noise coupling |
| NC (Pin 4) | No-connect | Internally unused; must be connected to PGND to maintain thermal and EMI integrity |
| FB (Pin 5) | Feedback input | Senses output via resistor divider; 0.1–100 nA bias current enables high-impedance dividers |
| PGND (Pin 6) | Power ground return | Closes high-current path for internal switch; connect directly to input/output capacitor grounds |
| SW (Pins 7–8) | Switch node | Drives external inductor and catch diode; dual pins reduce parasitic inductance and thermal resistance |
| VIND (Pins 9–10) | Main input supply | High-current VIN path; requires parallel 10 µF + 0.1 µF ceramic capacitors to PGND near pins |
| DAP | Die attach pad | Exposed copper thermal pad; solder to large PGND copper area for θJA = 53°C/W (WSON) |
Key Features
| Feature | Design Value |
|---|---|
| Internal 56 mΩ PMOS switch | Enables 3.0A continuous output without external MOSFETs; reduces BOM count and layout complexity |
| 1.5MHz fixed-frequency PWM | Permits use of ≤2.2 µH shielded inductors and 22 µF X7R MLCCs, cutting solution size by >40% vs 500 kHz designs |
| Internal soft-start (600 µs) | Prevents input inrush and output overshoot during EN assertion; eliminates need for external timing components |
| Frequency foldback | Reduces switching frequency to 400 kHz under startup/overload, limiting peak switch current and thermal stress |
| Output over-voltage protection | Disables switch when FB exceeds 0.69 V (15% above 0.6 V ref), preventing damage to downstream 1.8V/3.3V ICs |
Applications
| Multimedia Set Top Box | USB Powered Devices |
|---|---|
Use Scenario: Powering SoC core, memory, and video decode engines in compact cable/satellite receivers. IC Role / Device Role / Timing Role: Primary 1.2V/1.8V buck converter delivering up to 3.0A with fast transient response to burst video loads. Use Value: 93% peak efficiency and 30ns min-on-time ensure stable rail during CPU-intensive decoding without thermal throttling. | Use Scenario: Regulating 3.3V or 5V rails in portable USB hubs, webcams, and audio interfaces drawing up to 3A from host port. IC Role / Device Role / Timing Role: Self-contained step-down regulator with enable control synchronized to USB enumeration signals. Use Value: 300nA shutdown current extends battery life in bus-powered peripherals; WSON package fits tight 10 mm × 10 mm board areas. |
| HDD Core Power | Data Acquisition Systems |
Use Scenario: Supplying 1.2V core voltage to 2.5" HDD controller ASICs with rapid load transients during spin-up and seek operations. IC Role / Device Role / Timing Role: High-current, low-noise DC-DC stage placed adjacent to drive IC; handles 0.3A→3.0A load steps. Use Value: Peak current-mode control and internal compensation deliver <50 µs recovery from 3A load steps, minimizing data corruption risk. | Use Scenario: Generating precision 3.3V analog and digital supplies for ADC/DAC signal chains in industrial telemetry modules. IC Role / Device Role / Timing Role: Low-noise, thermally robust regulator powering mixed-signal ICs where PSRR and thermal stability are critical. Use Value: 0.6V ±2% reference and <0.08%/V line regulation ensure <±1% output accuracy across 3V–5.5V input variation and temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2833ZMYX/NOPB | 3.0 MHz switching frequency; 80–90% max duty cycle; 800 kHz foldback; 56 mΩ RDS(ON) | Better suited for ultra-compact layouts requiring <1 µH inductors and lower output capacitance | Select when board space is constrained and input-to-output ratio permits higher fSW operation |
| TPS62865RRLR | 2.5V–5.5V input; 0.6V–3.6V output; 4A; 2.25 MHz; integrated inductor option available | Offers higher current and optional module integration but lacks frequency foldback and has different enable threshold | Choose for next-gen designs needing higher current headroom or simplified layout with power modules |
Compared with LM2833ZMYX/NOPB, the LM2833XMYX/NOPB provides longer minimum on-time for low-VOUT applications and lower foldback frequency for improved overload robustness; versus TPS62865RRLR, it offers proven thermal shutdown hysteresis and simpler external component requirements at the cost of lower max current.
Availability
LM2833XMYX/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 RoHS-compliant packaging.
Supply support for LM2833XMYX/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 industrial applications where thermal performance, transient response, and minimal external component count are critical.
FAQ
What is the recommended input capacitor configuration for LM2833XMYX/NOPB?
TI recommends a parallel combination of 10 µF (X7R/X5R MLCC) and 0.1 µF (ceramic) capacitors placed as close as possible to VIND pins 9–10 and PGND. The 10 µF capacitor handles bulk energy storage and RMS current (up to 1.2 A), while the 0.1 µF unit suppresses high-frequency switching noise. Avoid leaded capacitors due to excessive ESL; use 1206 or smaller case sizes for lowest impedance.
Does LM2833XMYX/NOPB require external compensation components?
No, LM2833XMYX/NOPB features fully internal compensation optimized for peak current-mode control. No external Type II or Type III compensation networks are needed-only the feedback resistor divider (R1/R2) and basic input/output capacitors are required for stable operation across its full load and input voltage range.
How does the frequency foldback function protect LM2833XMYX/NOPB during startup?
When the FB pin voltage drops below 0.32 V (e.g., during soft-start or short-circuit), LM2833XMYX/NOPB reduces switching frequency from 1.5 MHz to 400 kHz. This lowers peak inductor current and switch stress, preventing thermal runaway and enabling safe recovery without latch-off-critical for reliable hot-plug USB operation.
What is the thermal performance of LM2833XMYX/NOPB in the WSON package?
In the 3 mm × 3 mm WSON package with DAP soldered to ≥1 cm² PGND copper, LM2833XMYX/NOPB achieves θJA = 53°C/W (still air) and θJC = 12°C/W. At 3.0A/5V→1.2V (75% efficiency), junction temperature rise is ~120°C above ambient-well within the 125°C max operating limit when ambient stays below 5°C, or with modest airflow.
Can LM2833XMYX/NOPB operate with an output voltage lower than 0.6V?
No-LM2833XMYX/NOPB's internal 0.6V reference sets the absolute minimum regulated output. The FB pin senses a resistive divider from VOUT, so outputs below 0.6V cannot be achieved without violating regulation. For sub-0.6V rails, a different regulator with adjustable reference or external error amplifier is required.
LM2833XMYX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-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:
- 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-MSOP-PowerPad
LM2833XMYX/NOPB FAQ
1.How can I place an order for LM2833XMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2833XMYX/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 LM2833XMYX/NOPB reliable?
The price and inventory of LM2833XMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2833XMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2833XMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2833XMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2833XMYX/NOPB?
LM2833XMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2833XMYX/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 LM2833XMYX/NOPB?
For technical support, including LM2833XMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2833XMYX/NOPB requirements.
6.How does Aetrix verify that LM2833XMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2833XMYX/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 LM2833XMYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2833XMYX/NOPB?
All LM2833XMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2833XMYX/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 LM2833XMYX/NOPB part is unused and in its original packaging.
Return procedure for LM2833XMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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