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Texas Instruments LM2833XMY/NOPB
- Part No.:
- LM2833XMY/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2833XMY/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:520
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Product details
Overview
LM2833XMY/NOPB from Texas Instruments is a monolithic 1.5MHz, 3.0A synchronous step-down DC-DC regulator in a 10-pin MSOP-PowerPAD package. It integrates a 56 mΩ PMOS switch, supports 3.0V–5.5V input, delivers 0.6V–4.5V output with ±2% reference accuracy, and achieves up to 93% efficiency-designed for compact USB-powered devices and core power in HDDs.
For engineers reviewing the LM2833XMY/NOPB datasheet, LM2833XMY/NOPB pinout, LM2833XMY/NOPB application, or LM2833XMY/NOPB equivalent, key selection criteria include its fixed 1.5MHz switching frequency, internal soft-start, cycle-by-cycle current limit, thermal shutdown, and compatibility with ceramic output capacitors in space-constrained designs.
Technical Context
The LM2833XMY/NOPB employs peak current-mode control with internal compensation, enabling stable regulation without external loop components. Its 30ns minimum on-time supports high-frequency operation down to 0.6V output across the full 3.0V–5.5V input range.
It features frequency foldback (reducing to 400kHz during startup/overload), UVLO with 350mV hysteresis (2.7V rising / 2.35V falling), and output over-voltage protection triggered at 0.69V FB voltage-ensuring robustness in dynamic load and fault conditions.
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 - sufficient for core rails in multimedia set-top boxes and DSL modems |
| Input Voltage Range | 3.0 V to 5.5 V - matches standard USB 5V and Li-ion battery systems |
| Output Voltage Range | 0.6 V to 4.5 V - programmable via external resistor divider; 0.6 V reference accurate to ±2% over line/load/temp |
| Internal Switch RDS(on) | 56 mΩ - reduces conduction loss at high load, supporting >90% efficiency at 2A/3.3V out |
| Quiescent Current | 5 mA (switching), 300 nA (shutdown) - enables ultra-low-power standby in portable applications |
| Thermal Shutdown | 165°C threshold with 15°C hysteresis - protects against sustained overload or poor heatsinking in enclosed enclosures |
Pinout & Package
LM2833XMY/NOPB uses the 10-pin MSOP-PowerPAD (DGQ) package with exposed thermal pad (DAP) for enhanced heat dissipation. The package measures 3.0 mm × 3.0 mm × 1.0 mm and requires soldering the DAP to a large PCB copper area for optimal θJA = 50°C/W performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINC (Pin 1) | Bias supply input | Powers internal control circuitry; must be locally bypassed to SGND with ≥0.1 µF capacitor |
| EN (Pin 2) | Enable control | Logic-high (>1.8 V) enables regulation; <0.4 V forces 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 layout guidelines |
| FB (Pin 5) | Feedback input | Monitors output via resistor divider; regulates to 0.6 V reference with 0.08%/V line regulation |
| PGND (Pin 6) | Power ground | Return path for switch current; separate from SGND to avoid noise injection into error amplifier |
| SW (Pins 7,8) | Switch node | Connects to inductor and catch diode anode; handles high dv/dt; requires short, low-inductance routing |
| VIND (Pins 9,10) | Main input supply | High-current VIN path; bypass each pin to PGND with ≥4.7 µF ceramic capacitor |
| DAP | Die attach pad | Thermal interface only; must be soldered to PCB thermal plane-no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| Internally compensated peak current-mode control | Eliminates need for external compensation components while maintaining stability across 0.6V–4.5V output range |
| Frequency foldback protection | Reduces switching frequency to 400 kHz when FB < 0.32 V, limiting peak switch current during startup or overload |
| Internal soft-start | Ramps reference voltage over ~600 µs to limit inrush current and prevent output overshoot |
| Cycle-by-cycle current limit | Triggers at 4.4 A typical switch current, protecting internal PMOS during short-circuit or heavy transient events |
| Output over-voltage protection | Disables switch when FB exceeds 0.69 V (15% above 0.6 V reference), preventing damage to downstream loads |
Applications
| Multimedia Set Top Box | Broadband Communications |
|---|---|
Use Scenario: Powering SoC core voltage (1.2 V) and memory I/O (3.3 V) in compact STB enclosures with limited airflow. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 3.0 A output with fast transient response to handle video decode bursts. Use Value: 1.5 MHz switching allows <2.2 µH inductors and 22 µF ceramic output caps-reducing solution size by >40% vs. 500 kHz alternatives. | Use Scenario: Supplying FPGA I/O banks and PHY interfaces in DSL/Cable modem gateways operating from 5 V rail. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter with tight output tolerance (±2%) for signal integrity-sensitive analog front-ends. Use Value: 56 mΩ RDS(on) and internal compensation deliver >92% efficiency at 2.5 V/2 A, minimizing thermal load in dense board layouts. |
| Core Power in HDDs | USB Powered Devices |
Use Scenario: Generating 1.8 V or 2.5 V logic supply for HDD controller ASICs powered from USB 5 V bus. IC Role / Device Role / Timing Role: Compact, thermally robust regulator handling rapid load transients during disk spin-up and data access. Use Value: Thermal shutdown (165°C) + frequency foldback ensure reliable operation during sustained 3 A loads without external thermal management. | Use Scenario: Regulating 3.3 V for microcontroller, sensors, and wireless transceivers in portable USB-C peripherals. IC Role / Device Role / Timing Role: Low-quiescent-power buck converter enabling <1 µA system sleep current via EN-controlled shutdown. Use Value: 300 nA shutdown current extends battery life in USB bus-powered devices; soft-start prevents host port overcurrent faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2833ZMY/NOPB | 3.0 MHz switching frequency, 80–90% max duty cycle, 7% min duty cycle, 800 kHz foldback | Better suited for ultra-compact designs requiring <1 µH inductors and lower output capacitance | Select LM2833ZMY/NOPB when board area is constrained and input-to-output voltage ratio is low (e.g., 5 V → 3.3 V) |
| TPS62231DRVR | 3.0 MHz, 0.6 V reference, 600 mA output, 16 V max input, different pinout and enable polarity | Lower current rating limits use to auxiliary rails-not suitable as direct replacement for 3 A loads | Choose TPS62231DRVR only for secondary low-current rails where footprint and 16 V input support are priorities |
Compared with LM2833ZMY/NOPB, LM2833XMY/NOPB offers higher duty cycle capability (95% vs. 90%) and lower foldback frequency (400 kHz), improving startup reliability under heavy loads; versus TPS62231DRVR, it delivers triple the output current but lacks high-input-voltage support-making LM2833XMY/NOPB optimal for 3–5.5 V, 3 A core power applications.
Availability
LM2833XMY/NOPB is available at Aetrix Electronics and suitable for multimedia set-top boxes, broadband communications gateways, and USB-powered portable devices requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for LM2833XMY/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 LM2833 family was engineered for space-constrained, high-current point-of-load applications-delivering 3 A in sub-10 mm² packages with integrated PMOS switches and robust protection features.
FAQ
What is the switching frequency of LM2833XMY/NOPB?
The LM2833XMY/NOPB operates at a fixed 1.5 MHz switching frequency. This high frequency enables the use of small inductors (typically ≤2.2 µH) and ceramic output capacitors (≥22 µF), reducing overall solution size and cost. Frequency foldback lowers it to 400 kHz during startup or overload to limit peak switch current.
Does LM2833XMY/NOPB require external compensation components?
No, LM2833XMY/NOPB uses internally compensated peak current-mode control. No external compensation network is needed-simplifying design, reducing BOM count, and ensuring stability across its full 0.6 V–4.5 V output range and 3.0 V–5.5 V input range without tuning.
What is the maximum continuous output current supported by LM2833XMY/NOPB?
LM2833XMY/NOPB delivers up to 3.0 A of steady-state output current under proper thermal conditions (e.g., 50°C/W θJA, 25°C ambient). Peak current limit is 4.4 A typical, and thermal shutdown activates at ~165°C junction temperature to protect against sustained overload.
How does the EN pin function on LM2833XMY/NOPB?
The EN pin on LM2833XMY/NOPB controls device operation: a voltage >1.8 V enables regulation, while <0.4 V places LM2833XMY/NOPB in 300 nA shutdown mode. There is no internal pull-up, so an external signal or direct tie to VIN is required-floating the pin is prohibited.
Can LM2833XMY/NOPB be used with ceramic output capacitors?
Yes, LM2833XMY/NOPB is fully compatible with ceramic output capacitors. Its internal compensation and peak current-mode architecture maintain stability with low-ESR MLCCs (e.g., 22 µF X7R). Ceramic caps also improve high-frequency noise filtering and transient response compared to tantalum or aluminum electrolytic types.
LM2833XMY/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:
- 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-MSOP-PowerPad
LM2833XMY/NOPB FAQ
1.How can I place an order for LM2833XMY/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2833XMY/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 LM2833XMY/NOPB reliable?
The price and inventory of LM2833XMY/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2833XMY/NOPB is usually 5 days.
3.What payment methods are accepted for LM2833XMY/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2833XMY/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2833XMY/NOPB?
LM2833XMY/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2833XMY/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 LM2833XMY/NOPB?
For technical support, including LM2833XMY/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2833XMY/NOPB requirements.
6.How does Aetrix verify that LM2833XMY/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2833XMY/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 LM2833XMY/NOPB meets industry standards.
7.What is the process for return or replacement of LM2833XMY/NOPB?
All LM2833XMY/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2833XMY/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 LM2833XMY/NOPB part is unused and in its original packaging.
Return procedure for LM2833XMY/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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