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Texas Instruments LM2830XMFX/NOPB
- Part No.:
- LM2830XMFX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2830XMFX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM2830XMFX/NOPB from Texas Instruments is a monolithic, high-frequency PWM step-down DC-DC regulator in a 5-pin SOT-23 package, delivering 1.0-A output current with internal 130-mΩ PMOS switch, 1.6-MHz fixed switching frequency, and 0.6-V ±2% internal reference voltage. It regulates 5-V input to stable 3.3-V output for core power in space-constrained USB-powered devices and set-top boxes.
For engineers reviewing the LM2830XMFX/NOPB datasheet, LM2830XMFX/NOPB pinout, LM2830XMFX/NOPB application, or LM2830XMFX/NOPB equivalent, key selection criteria include input voltage range (3.0–5.5 V), output voltage adjustability (0.6–4.5 V), thermal shutdown (165°C), soft-start timing (~600 µs), and quiescent current in shutdown (30 nA).
Technical Context
The LM2830XMFX/NOPB implements current-mode PWM control with internal compensation, enabling stable regulation across load and line variations without external loop components. Its 1.6-MHz oscillator supports ceramic inductors as small as 3.3 µH and chip capacitors down to 22 µF while maintaining <1% load regulation at 1-A full load.
It integrates undervoltage lockout (UVLO rising threshold 2.73 V, hysteresis 430 mV), cycle-by-cycle current limiting (1.75-A typical limit), and output overvoltage protection (15% above 0.6-V reference). The 5-pin SOT-23 layout places GND adjacent to FB for low-noise feedback routing and minimizes parasitic inductance on the SW node.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1.0 A continuous - supports single-core processors and USB peripherals without external current boosting. |
| Switching Frequency | 1.6 MHz fixed - enables use of ≤3.3-µH shielded inductors and eliminates audible noise in consumer audio systems. |
| Input Voltage Range | 3.0 V to 5.5 V - compatible with Li-ion battery packs (3.3 V min) and standard 5-V USB/USB-C power rails. |
| Feedback Reference | 0.600 V ±2% - sets output voltage via resistor divider; allows precise 3.3-V, 2.5-V, or 1.2-V regulation with <1% error. |
| PMOS RDS(on) | 130 mΩ (SOT-23) - limits conduction loss to ≤130 mW at 1-A load, supporting >90% peak efficiency at 5-V→3.3-V conversion. |
| Shutdown Current | 30 nA - enables ultra-low-power standby in battery-backed systems without requiring external load switches. |
| Thermal Shutdown | 165°C junction - protects against sustained overload or poor PCB thermal design; auto-recovery at ~150°C. |
Pinout & Package
LM2830XMFX/NOPB uses the 5-pin SOT-23 package (2.90 mm × 1.60 mm), optimized for minimal PCB area and thermal performance via exposed pad grounding in WSON variants (not applicable here). Pin functions are validated per TI SNVS454E Rev E.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pin 1) | Switch Node Output | Connects directly to inductor and catch diode anode; carries high di/dt pulsed current - requires short, wide trace and ground plane clearance. |
| GND (Pin 2) | Signal & Power Ground | Primary return path for feedback network and internal regulators; bottom resistor of FB divider must be placed adjacent to this pin. |
| FB (Pin 3) | Voltage Feedback Input | Senses output via resistive divider; high-impedance (≤100 nA bias) - sensitive to noise; routed away from SW and EN traces. |
| EN (Pin 4) | Enable Control Input | Active-high logic interface; 1.8-V threshold - pulled up to VIN via 100-kΩ resistor for default operation; floats to shutdown if left open. |
| VIN (Pin 5) | Power Input Supply | Accepts 3.0–5.5 V; supplies both control circuitry and PMOS gate drive; requires local 22-µF ceramic bypass capacitor within 5 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Internal Soft-Start | Ramps reference from 0 V to 0.6 V over ~600 µs - limits inrush current into 22-µF output capacitors during cold start. |
| Current-Mode Control | Enables fast transient response (<10 µs to settle after 500-mA load step) without external compensation components. |
| Overvoltage Protection | Shuts off PMOS when FB exceeds 0.69 V (15% above 0.6-V reference) - prevents damage to downstream 3.3-V logic during feedback fault. |
| Undervoltage Lockout | Disables regulator below 2.3 V (falling) and re-enables above 2.73 V (rising) - avoids brownout oscillation during battery discharge. |
| Thermal Shutdown | Halts switching at 165°C junction temperature and resumes only after cooldown to ~150°C - prevents permanent silicon damage. |
Applications
| USB-Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Regulating 5-V USB bus to 3.3-V for HDMI controller, tuner IC, and memory interfaces in compact STB enclosures. IC Role / Device Role / Timing Role: Primary buck converter supplying core logic voltage with tight ripple (<20 mVpp) and fast load-step response. Use Value: Enables single-rail 5-V input architecture, eliminating need for discrete LDOs and reducing BOM count by two components. |
Use Scenario: Generating 3.3-V supply for demodulator, Ethernet PHY, and flash memory in cost-sensitive digital TV receivers. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator operating continuously at 800-mA average load with 100-mA transient peaks. Use Value: Achieves >92% efficiency at 5-V→3.3-V/1-A, reducing thermal load on plastic enclosure and avoiding forced-air cooling. |
| HDD Core Power | DSL Modems |
Use Scenario: Providing regulated 3.3-V rail to HDD servo controller and buffer memory during spin-up and seek operations. IC Role / Device Role / Timing Role: Load-step capable buck regulator handling 0–1-A transients within 5 µs while maintaining <±1% output deviation. Use Value: Eliminates voltage droop-induced command retries, improving sequential read/write throughput by up to 8%. |
Use Scenario: Converting 5-V adapter output to 3.3-V for ADSL2+ line driver, DSP, and management MCU in residential gateways. IC Role / Device Role / Timing Role: Always-on power stage meeting ETSI Class B conducted emissions limits via 1.6-MHz fixed-frequency operation. Use Value: Reduces EMI filter component count by 40% compared to 500-kHz alternatives, lowering total solution size by 25 mm². |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRVR | 1.8-MHz switching, 0.6-V reference, 1.0-A rating, but uses external compensation and lacks OVP. | Requires additional RC network for stability; no built-in overvoltage protection - needs external clamp for safety-critical 3.3-V rails. | Select when board space allows extra components and OVP is handled elsewhere in system design. |
| AP3418KTR-G1 | 1.5-MHz frequency, 0.6-V reference, 1.0-A rating, but higher RDS(on) (200 mΩ) and no thermal shutdown. | Lower efficiency (≈87% at 1-A), no thermal fault protection - unsuitable for sealed enclosures or high ambient temperatures. | Consider only for cost-driven, non-thermal-challenged applications where 90°C max ambient is guaranteed. |
Compared with TPS62231DRVR and AP3418KTR-G1, LM2830XMFX/NOPB provides integrated OVP, thermal shutdown, and internal compensation in the smallest SOT-23 footprint - simplifying design validation and reducing time-to-market for USB and STB platforms.
Availability
LM2830XMFX/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, HDD core power, DSL modems, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LM2830XMFX/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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for consumer, industrial, and automotive markets.
LM2830XMFX/NOPB belongs to TI's high-frequency buck regulator product line, designed specifically for space-constrained, efficiency-critical applications where minimal external components and robust protection features are mandatory.
FAQ
What is the maximum output current capability of the LM2830XMFX/NOPB?
The LM2830XMFX/NOPB delivers up to 1.0 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 5 V, VOUT = 3.3 V). Its cycle-by-cycle current limit is specified at 1.2 A minimum and 1.75 A typical, ensuring safe operation even during transient overloads. Derating is required above 85°C ambient due to thermal constraints in the SOT-23 package.
Does the LM2830XMFX/NOPB require external compensation components?
No, the LM2830XMFX/NOPB uses internally compensated current-mode control architecture. Unlike many buck controllers, it operates stably with only five external components (input cap, output cap, inductor, catch diode, and FB divider) - no external compensation network is needed, simplifying layout and reducing BOM cost.
What is the purpose of the EN pin on the LM2830XMFX/NOPB?
The EN pin on the LM2830XMFX/NOPB is an active-high enable input that controls device startup and shutdown. Driving EN ≥1.8 V enables regulation; pulling EN <0.4 V disables the IC, reducing quiescent current to 30 nA. It must not float - TI recommends connecting it to VIN via a 100-kΩ pull-up resistor for default operation.
Can the LM2830XMFX/NOPB be used to generate a 1.2-V output?
Yes, the LM2830XMFX/NOPB supports adjustable output voltages from 0.6 V to 4.5 V using an external resistor divider on the FB pin. For 1.2-V output, use R1 = 15.0 kΩ and R2 = 15.0 kΩ (per TI's Bill of Materials in SNVS454E), yielding VOUT = 0.6 × (1 + R1/R2) = 1.2 V with <1% accuracy over temperature and line variation.
How does the LM2830XMFX/NOPB handle overvoltage conditions?
The LM2830XMFX/NOPB includes internal output overvoltage protection (OVP) that monitors the FB pin. If the feedback voltage exceeds 0.69 V (15% above the 0.6-V reference), the internal PMOS switch is immediately disabled, allowing the output to decay safely. This protects downstream 3.3-V logic from damage during feedback resistor failure or solder shorts.
LM2830XMFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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:
- 1A
- Frequency - Switching:
- 1.6MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM2830XMFX/NOPB FAQ
1.How can I place an order for LM2830XMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2830XMFX/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 LM2830XMFX/NOPB reliable?
The price and inventory of LM2830XMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2830XMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2830XMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2830XMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2830XMFX/NOPB?
LM2830XMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2830XMFX/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 LM2830XMFX/NOPB?
For technical support, including LM2830XMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2830XMFX/NOPB requirements.
6.How does Aetrix verify that LM2830XMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2830XMFX/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 LM2830XMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2830XMFX/NOPB?
All LM2830XMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2830XMFX/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 LM2830XMFX/NOPB part is unused and in its original packaging.
Return procedure for LM2830XMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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