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Texas Instruments LM2830XQMFX/E7002801
- Part No.:
- LM2830XQMFX/E7002801
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2830XQMFX/E7002801.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,087
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Product details
Overview
LM2830XQMFX/E7002801 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 local power domains in space-constrained USB-powered devices.
For engineers reviewing the LM2830XQMFX/E7002801 datasheet, LM2830XQMFX/E7002801 pinout, LM2830XQMFX/E7002801 application, or LM2830XQMFX/E7002801 equivalent, key selection criteria include its 3.0–5.5-V input range, current-mode control architecture, thermal shutdown at 165°C, soft-start timing of ~600 µs, and ultra-low 30-nA shutdown quiescent current.
Technical Context
The LM2830XQMFX/E7002801 implements constant-frequency current-mode PWM control with internal compensation, enabling stable regulation across load transients 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 >93% peak efficiency at 1-A load.
Functional modes include enable-controlled startup (EN logic-high active), undervoltage lockout with 2.73-V turn-on threshold and 430-mV hysteresis, cycle-by-cycle current limiting at 1.75-A typical, and overvoltage protection triggered when FB exceeds 15% above 0.6-V reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6 MHz - enables use of compact 3.3-µH inductors and 22-µF ceramic capacitors, minimizing PCB footprint |
| Output Current | 1.0 A continuous - supports core power for HDDs, set-top boxes, and USB peripherals without external boost |
| Input Voltage Range | 3.0 V to 5.5 V - compatible with single-cell Li-ion, USB 5-V, and regulated 3.3-V/5-V rails |
| Feedback Reference | 0.600 V ±2% - sets output voltage via resistor divider; enables 3.3-V output with R1/R2 = 4.5kΩ/10kΩ |
| Quiescent Current | 30 nA in shutdown - preserves battery life in always-on USB devices during standby |
| Thermal Shutdown | 165°C junction - protects against sustained overload or poor heatsinking in sealed enclosures |
| PMOS RDS(ON) | 130 mΩ (SOT-23) - limits conduction loss to ≤130 mW at 1-A load, supporting >90% efficiency at mid-load |
Pinout & Package
LM2830XQMFX/E7002801 uses a 5-pin SOT-23 package (2.90 mm × 1.60 mm) with exposed pad not present; thermal path relies on PCB copper area under GND pin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node output | Connects to inductor and catch diode anode; swings between VIN and –0.3 V during operation |
| GND | Signal and power ground | Reference for feedback divider bottom resistor; must be placed adjacent to FB pin to minimize noise coupling |
| FB | Feedback input | Senses output voltage via resistor divider; 0.1–100 nA bias current allows high-impedance dividers |
| EN | Enable control input | Logic-high (>1.8 V) enables regulation; floating or >VIN+0.3 V damages device; pull-up to VIN required |
| VIN | Power input supply | Supplies both control circuitry and PMOS switch; requires 22-µF low-ESL ceramic capacitor within 5 mm |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Ramps reference from 0 V to 0.6 V over ~600 µs, limiting inrush current into 22-µF output capacitor |
| Current-mode PWM | Enables fast transient response (<10 µs) and inherent cycle-by-cycle current limiting without external sense resistor |
| Overvoltage protection | Disables SW when FB exceeds 0.69 V (15% above 0.6-V reference), preventing damage to downstream 3.3-V ICs |
| Undervoltage lockout | Holds EN inactive until VIN ≥ 2.73 V, then remains on until VIN drops below 2.3 V - prevents brownout oscillation |
| Thermal shutdown | Halts switching at 165°C junction and resumes only after cooldown to ~150°C, avoiding latch-up in enclosed designs |
Applications
| Local 5-V to Vcore Converters | Core Power in HDDs |
|---|---|
Use Scenario: Converting USB 5-V bus to 3.3-V rail powering microcontroller cores and interface logic in portable storage enclosures. IC Role / Device Role / Timing Role: Primary step-down regulator providing tightly regulated 3.3-V supply with <±1% line/load regulation. Use Value: Enables direct USB bus powering without external LDO post-regulation, reducing BOM count and thermal load. | Use Scenario: Supplying 3.3-V logic and servo control voltage to HDD controller ASICs in consumer NAS units. IC Role / Device Role / Timing Role: High-efficiency buck converter handling 1-A pulsed loads during head seek and spin-up events. Use Value: Maintains stable output during 500-ms 1-A transients with <50-mV droop, eliminating need for oversized bulk capacitance. |
| USB Powered Devices | DSL Modems |
Use Scenario: Regulating 5-V USB power to 3.3-V for Wi-Fi SoC, USB PHY, and flash memory in portable hotspots. IC Role / Device Role / Timing Role: Main DC-DC converter with enable pin synchronized to host USB suspend/resume signaling. Use Value: Achieves 30-nA shutdown current during USB suspend, extending battery runtime by >48 hours. | Use Scenario: Generating 3.3-V supply for DSL line driver, PHY, and management MCU in residential gateways. IC Role / Device Role / Timing Role: Compact, thermally robust regulator operating continuously at 40°C ambient with no heatsink. Use Value: Delivers 92% efficiency at 750-mA load, reducing thermal stress on plastic enclosure and improving MTBF. |
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 | 1.6-MHz synchronous buck; 0.6-V reference; 1-A rating; 2.05-V to 6.5-V input | Supports lower VIN start-up (2.05 V); requires no external diode; higher light-load efficiency via DCS-Control | Preferred where input may dip below 3.0 V or where synchronous rectification improves system efficiency |
| MP1471GJ-Z | 1.6-MHz asynchronous buck; 0.8-V reference; 1-A rating; 4.5-V to 16-V input | Higher input range; larger 8-pin SOT-563 package; no integrated OVP or soft-start | Only suitable where input exceeds 4.5 V and board space permits larger footprint |
Compared with LM2830XQMFX/E7002801, TPS62231DRVR eliminates the external catch diode and extends input range downward, while MP1471GJ-Z trades integrated protection features for wider VIN capability-neither offers pin compatibility, requiring layout revision.
Availability
LM2830XQMFX/E7002801 is available at Aetrix Electronics and suitable for USB-powered devices, DSL modems, set-top boxes, and portable HDDs requiring stable component supply with guaranteed long-term sourcing.
Supply support for LM2830XQMFX/E7002801 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 designing analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The LM2830 product line delivers high-frequency, compact buck regulators optimized for space-constrained, battery-sensitive applications such as USB peripherals and consumer networking equipment.
FAQ
What is the maximum output current supported by LM2830XQMFX/E7002801?
The LM2830XQMFX/E7002801 supports up to 1.0-A continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 5 V). Its cycle-by-cycle current limit activates at 1.75-A typical, protecting the internal 130-mΩ PMOS switch during short transients. Sustained 1-A operation requires adequate PCB copper area on the GND pin for thermal dissipation.
Does LM2830XQMFX/E7002801 require an external catch diode?
Yes, LM2830XQMFX/E7002801 requires an external Schottky catch diode (e.g., Toshiba CRS08) connected between SW and GND. Unlike synchronous buck converters, it uses an internal PMOS high-side switch and relies on the external diode for inductor discharge during off-time. Diode selection must meet 1.5-A average current rating and ≤0.7-V forward voltage to maintain >90% efficiency.
How is the output voltage set on LM2830XQMFX/E7002801?
The output voltage of LM2830XQMFX/E7002801 is set using a resistor divider from VO to FB to GND, leveraging its 0.600-V ±2% internal reference. For 3.3-V output, use R1 = 45.3 kΩ between VO and FB, and R2 = 10.0 kΩ between FB and GND. The FB pin draws only 0.1–100 nA, allowing high-impedance dividers that minimize quiescent current impact.
What thermal considerations apply to LM2830XQMFX/E7002801 in SOT-23 package?
LM2830XQMFX/E7002801 in SOT-23 has a junction-to-ambient thermal resistance (RθJA) of 165.2°C/W. To maintain TJ ≤ 125°C at 1-A load, PCB layout must provide ≥100 mm² of 2-oz copper connected to the GND pin. Thermal shutdown triggers at 165°C and resets at ~150°C, so continuous operation near thermal limit requires derating or forced airflow.
Can LM2830XQMFX/E7002801 operate from a 3.3-V input to generate 3.3-V output?
No, LM2830XQMFX/E7002801 cannot regulate 3.3-V output from a 3.3-V input because its minimum dropout is constrained by the 130-mΩ PMOS RDS(ON) and required duty cycle margin. With VIN = 3.3 V, the maximum achievable VOUT is approximately 2.8 V (D ≈ 95%). For unity-gain or low-dropout applications, a dedicated LDO or buck-boost topology is required instead of LM2830XQMFX/E7002801.
LM2830XQMFX/E7002801 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Bulk
- 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
LM2830XQMFX/E7002801 FAQ
1.How can I place an order for LM2830XQMFX/E7002801 through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2830XQMFX/E7002801 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 LM2830XQMFX/E7002801 reliable?
The price and inventory of LM2830XQMFX/E7002801 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2830XQMFX/E7002801 is usually 5 days.
3.What payment methods are accepted for LM2830XQMFX/E7002801?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2830XQMFX/E7002801 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2830XQMFX/E7002801?
LM2830XQMFX/E7002801 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2830XQMFX/E7002801 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 LM2830XQMFX/E7002801?
For technical support, including LM2830XQMFX/E7002801 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2830XQMFX/E7002801 requirements.
6.How does Aetrix verify that LM2830XQMFX/E7002801 is sourced from the original manufacturer or authorized distributors?
All LM2830XQMFX/E7002801 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 LM2830XQMFX/E7002801 meets industry standards.
7.What is the process for return or replacement of LM2830XQMFX/E7002801?
All LM2830XQMFX/E7002801 units undergo pre-shipment inspection (PSI). If there is an issue with LM2830XQMFX/E7002801, 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 LM2830XQMFX/E7002801 part is unused and in its original packaging.
Return procedure for LM2830XQMFX/E7002801:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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