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Texas Instruments LM2833ZMYX/NOPB
- Part No.:
- LM2833ZMYX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LM2833ZMYX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 3A 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,127
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Product details
Overview
LM2833ZMYX/NOPB from Texas Instruments is a monolithic 3.0 MHz, 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 high efficiency (up to 93%) for compact USB-powered devices and core power in HDDs.
For engineers reviewing the LM2833ZMYX/NOPB datasheet, LM2833ZMYX/NOPB pinout, LM2833ZMYX/NOPB application, or LM2833ZMYX/NOPB equivalent, key selection criteria include its fixed 3.0 MHz switching frequency, 3.0A steady-state output capability, input voltage range of 3.0V–5.5V, and integrated soft-start and thermal shutdown protection.
Technical Context
The LM2833ZMYX/NOPB implements peak current-mode control with internal compensation, enabling stable regulation without external loop components. Its 30 ns minimum on-time supports operation down to 0.6V output across the full 3.0V–5.5V input range.
It features frequency foldback (reducing switching frequency to 800 kHz when FB < 0.32 V), cycle-by-cycle current limiting (4.4 A typical), and thermal shutdown at 165°C with 15°C hysteresis - all implemented in a single-die BiCMOS process.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | Fixed 3.0 MHz - enables use of sub-1 µH inductors and low-ESR ceramic capacitors for ultra-compact designs. |
| Output Current | 3.0 A steady-state - supports high-current loads like HDD spindle motors or multi-core SoC cores without external MOSFETs. |
| Input Voltage Range | 3.0 V to 5.5 V - matches standard USB 5V and Li-ion battery rails (3.3V–4.2V) without pre-regulation. |
| Feedback Reference | 0.600 V ±2% - sets precise output voltage via external resistor divider; line regulation ≤0.08%/V ensures stability over input variation. |
| Internal Switch RDS(ON) | 56 mΩ - minimizes conduction loss at 3A load, contributing to ≥90% efficiency at mid-load in typical 5V→3.3V conversion. |
| Quiescent Current | 4.3–6.5 mA (active), 300 nA (shutdown) - enables long battery life in always-on USB peripherals during standby. |
| UVLO Threshold | 2.70 V (rising), 2.35 V (falling) with 350 mV hysteresis - prevents erratic startup during brown-out conditions. |
Pinout & Package
LM2833ZMYX/NOPB uses a 3 mm × 3 mm, 10-pin WSON (Package Code: MYX) with exposed thermal pad (DAP). The package provides low θJA = 53°C/W and θJC = 12°C/W for efficient heat dissipation in space-constrained layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VINC (Pin 1) | Bias supply input | Provides dedicated 3–5.5 V supply for internal control circuitry; must be locally bypassed 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 required. |
| SGND (Pin 3) | Analog ground | Reference for feedback network; place bottom resistor (R2) adjacent to minimize noise coupling into FB path. |
| NC (Pin 4) | No-connect | Internally unused; must be connected to PGND for mechanical stability and thermal performance. |
| FB (Pin 5) | Feedback input | Senses output voltage via resistor divider; internal 0.6 V reference enables outputs from 0.6 V to 4.5 V. |
| PGND (Pin 6) | Power ground | Primary return path for switch current; connect directly to PCB ground plane under DAP for low-impedance thermal path. |
| SW (Pins 7,8) | Switch node | Drives external inductor and catch diode; dual pins reduce trace inductance and improve EMI performance. |
| VIND (Pins 9,10) | Main input supply | High-current VIN connection; requires local 22 µF ceramic bypass capacitor between VIND and PGND. |
| DAP | Die attach pad | Exposed thermal pad soldered to PCB ground plane - essential for thermal management and achieving rated 3A output. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed 3.0 MHz switching | Enables use of 0.47 µH–1.0 µH shielded inductors and eliminates need for external frequency programming components. |
| Integrated soft-start | 600 µs internal ramp of error amplifier reference limits inrush current and suppresses output overshoot during EN-triggered startup. |
| Frequency foldback | Automatically reduces switching frequency to 800 kHz when FB < 0.32 V - protects against overcurrent during short-circuit or heavy overload. |
| Output over-voltage protection | Shuts off internal PMOS when FB exceeds 0.69 V (15% above 0.6 V reference) - prevents damage to downstream 3.3 V or 2.5 V logic. |
| Thermal shutdown with hysteresis | Disables switching at 165°C junction temperature and re-enables only after cooling to ~150°C - prevents thermal cycling and ensures safe recovery. |
Applications
| USB Powered Devices | Multimedia Set Top Box |
|---|---|
Use Scenario: Powering FPGA I/O banks and USB PHY circuitry from a 5 V USB port with strict board area constraints. IC Role / Device Role / Timing Role: Primary 3.3 V/2.5 V point-of-load regulator delivering up to 3.0 A with fast transient response to handle burst data transfers. Use Value: 3.0 MHz switching allows 1.0 µH inductor + 22 µF ceramic output capacitor - total solution size < 40 mm². | Use Scenario: Supplying core voltage to ARM-based media processor and DDR memory interface in consumer STB. IC Role / Device Role / Timing Role: High-efficiency buck converter generating 1.2 V @ 2.5 A for CPU core, with tight regulation under dynamic load steps. Use Value: Peak current-mode control and internal compensation deliver < 20 mV output deviation during 0.5 A → 2.5 A load transients. |
| Core Power in HDDs | Data Acquisition/Telemetry |
Use Scenario: Providing regulated 3.3 V to HDD controller ASIC and spindle motor driver IC in portable storage enclosures. IC Role / Device Role / Timing Role: Main 3.3 V supply with thermal shutdown and UVLO to ensure reliable operation during battery voltage sag or ambient temperature spikes. Use Value: 56 mΩ RDS(ON) and 93% peak efficiency minimize self-heating in sealed enclosure environments. | Use Scenario: Powering precision ADC, sensor front-end, and wireless transceiver in battery-operated telemetry nodes. IC Role / Device Role / Timing Role: Low-noise, enable-controlled 2.5 V supply with 300 nA shutdown current to extend multi-year battery life. Use Value: Internal soft-start and frequency foldback prevent false triggers during cold-start and sensor fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2833XMYX/NOPB | 1.5 MHz switching frequency, 58 mΩ RDS(ON), higher max duty cycle (95%) | Better suited for lower input-to-output ratios (e.g., 5V→3.3V) where larger inductors are acceptable | Select when lower EMI or relaxed size constraints allow use of 1.5 µH inductors and prioritize marginally higher efficiency at light loads. |
| TPS62865RQYR | 4 MHz, 2.5 A, 16 V max input, I2C programmable output, smaller 1.2 mm × 0.8 mm WCSP | Supports wider input range and digital voltage scaling but lacks integrated OVP and foldback | Choose for next-gen designs requiring programmability and higher input voltage tolerance, accepting added system complexity for configuration. |
Compared with LM2833ZMYX/NOPB, the LM2833XMYX/NOPB trades switching speed for slightly better light-load efficiency and relaxed inductor sizing, while the TPS62865RQYR offers programmability and higher input rating at the cost of missing integrated protection features and requiring external configuration.
Availability
LM2833ZMYX/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, multimedia set top boxes, core power in HDDs, and data acquisition systems requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2833ZMYX/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 was designed specifically for space-constrained, high-current point-of-load applications in consumer and computing electronics, emphasizing minimal external component count and robust protection integration.
FAQ
What is the maximum output current supported by the LM2833ZMYX/NOPB?
The LM2833ZMYX/NOPB supports a steady-state output current of 3.0 A under typical operating conditions (TA = 25°C, 5V input, 3.3V output, proper PCB layout with DAP thermal connection). Peak current limit is 4.4 A typical, but continuous operation above 3.0 A requires careful thermal design due to power dissipation in the 56 mΩ internal switch.
Does the LM2833ZMYX/NOPB require external compensation components?
No, the LM2833ZMYX/NOPB uses internally compensated peak current-mode control and requires no external compensation network. This simplifies design and reduces bill-of-materials count - only input/output capacitors, inductor, feedback resistors, and optional feed-forward capacitor (CFF) are needed for basic operation.
What is the purpose of the separate VINC and VIND pins on the LM2833ZMYX/NOPB?
VINC supplies bias power to internal control circuitry (error amplifier, oscillator, logic) and must be bypassed locally to SGND; VIND supplies high-current power to the internal PMOS switch and must be bypassed to PGND. Separating these paths prevents switching noise from modulating control circuitry, improving regulation accuracy and transient response.
How does frequency foldback operate in the LM2833ZMYX/NOPB?
Frequency foldback activates when the FB pin voltage drops below 0.32 V (typical), reducing switching frequency from 3.0 MHz to 800 kHz. This occurs during startup, overload, or short-circuit events to limit peak switch current and power dissipation - verified in TI's SNVS505E datasheet Figure 14 and Application Information section.
Can the LM2833ZMYX/NOPB be used with an input voltage below 3.0 V?
No - the LM2833ZMYX/NOPB has a specified operating input range of 3.0 V to 5.5 V per its Absolute Maximum and Operating Ratings. Input voltage below 3.0 V falls outside guaranteed operation; UVLO disables the device below 2.35 V (falling threshold), and regulation is not assured between 2.35 V and 3.0 V.
LM2833ZMYX/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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP-PowerPad
LM2833ZMYX/NOPB FAQ
1.How can I place an order for LM2833ZMYX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2833ZMYX/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 LM2833ZMYX/NOPB reliable?
The price and inventory of LM2833ZMYX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2833ZMYX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2833ZMYX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2833ZMYX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2833ZMYX/NOPB?
LM2833ZMYX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2833ZMYX/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 LM2833ZMYX/NOPB?
For technical support, including LM2833ZMYX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2833ZMYX/NOPB requirements.
6.How does Aetrix verify that LM2833ZMYX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2833ZMYX/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 LM2833ZMYX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2833ZMYX/NOPB?
All LM2833ZMYX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2833ZMYX/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 LM2833ZMYX/NOPB part is unused and in its original packaging.
Return procedure for LM2833ZMYX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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