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Texas Instruments LM2830XQMFX/NOPB
- Part No.:
- LM2830XQMFX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2830XQMFX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,189
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Product details
Overview
LM2830XQMFX/NOPB from Texas Instruments is a high-frequency, current-mode PWM step-down DC-DC regulator IC in a 5-pin SOT-23 package, delivering up to 1.0 A output current with 0.6 V internal reference, 1.6 MHz fixed switching frequency, and 130 mΩ PMOS switch. It regulates 3.0–5.5 V input to adjustable 0.6–4.5 V output for compact point-of-load power in USB-powered devices and set-top boxes.
For engineers reviewing the LM2830XQMFX/NOPB datasheet, LM2830XQMFX/NOPB pinout, LM2830XQMFX/NOPB application, or LM2830XQMFX/NOPB equivalent, key selection criteria include its 1.6 MHz operation enabling ultra-small magnetics, internal soft-start limiting inrush, thermal shutdown at 165°C, and 30 nA shutdown current for battery-sensitive designs.
Technical Context
The LM2830XQMFX/NOPB implements constant-frequency current-mode control with internal compensation, using a 0.6 V reference and feedback divider to regulate output voltage. Its 1.6 MHz oscillator enables sub-microsecond on-times (as low as 30 ns), supporting high duty-cycle operation down to 0.6 V output while maintaining stability across 3.0–5.5 V input.
It integrates pulse-by-pulse current limiting (1.2–1.75 A typical), undervoltage lockout (2.73 V turn-on, 2.3 V turn-off with 430 mV hysteresis), overvoltage protection (15% above VREF), and thermal shutdown. The EN pin provides logic-level enable/disable with 30 nA quiescent current in shutdown mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 1.6 MHz - enables use of ≤3.3 µH inductors and 22 µF ceramic capacitors for minimal PCB footprint |
| Output Current | 1.0 A continuous - supports core power in HDDs and local Vcore conversion 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 via resistor divider; enables 0.6 V minimum output with tight regulation |
| PMOS RDS(ON) | 130 mΩ (SOT-23) - limits conduction loss at 1 A; contributes to ≥93% peak efficiency at 5 V→3.3 V |
| Quiescent Current | 30 nA in shutdown - preserves battery life in always-on USB peripherals and portable modems |
| Thermal Shutdown | 165°C junction - protects against sustained overload or poor heatsinking in enclosed set-top box enclosures |
Pinout & Package
LM2830XQMFX/NOPB uses a 5-pin SOT-23 package (2.90 mm × 1.60 mm body size) 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 FB, EN, and internal circuits; must be routed with low-inductance trace to bottom resistor of feedback divider |
| FB | Feedback input | Senses divided output voltage; internal 0.6 V reference compares against this node to adjust duty cycle |
| EN | Enable control input | Logic-high (>1.8 V) enables regulation; floating or >VIN+0.3 V damages device; pull-up to VIN required if unused |
| VIN | Power input supply | Supplies both control circuitry and PMOS switch; requires 22 µF ceramic input capacitor near pin for transient stability |
Key Features
| Feature | Design Value |
|---|---|
| Internal soft-start | Ramps reference from 0 V to 0.6 V over ~600 µs - prevents output overshoot and limits inrush into large output capacitors |
| Current-mode PWM | Provides inherent cycle-by-cycle current limiting and fast transient response without external compensation components |
| Overvoltage protection | Shuts off PMOS when FB exceeds 0.69 V (15% above 0.6 V) - prevents damage to downstream 3.3 V logic during feedback divider failure |
| Undervoltage lockout | Enables only above 2.73 V (typical) with 430 mV hysteresis - avoids unstable startup during brownout or slow-rising input rails |
| Thermal shutdown | Disables switching at 165°C junction and re-enables at ~150°C - allows safe recovery after temporary overload without latch-up |
Applications
| USB Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Powering FPGA I/O banks or USB PHY from 5 V bus in portable media adapters. IC Role / Device Role / Timing Role: Primary step-down regulator converting 5 V USB power to 3.3 V or 1.8 V logic supply. Use Value: 1.6 MHz operation minimizes solution size; 30 nA shutdown current extends battery runtime during suspend. | Use Scenario: Generating 1.2 V core voltage for SoC in cable/satellite receiver with space-constrained PCB layout. IC Role / Device Role / Timing Role: High-efficiency buck converter delivering 1.0 A at 1.2 V from 3.3 V or 5 V intermediate rail. Use Value: Internal compensation and current-mode control ensure stable regulation under dynamic load steps from video decoding. |
| HDD Core Power | DSL Modems |
Use Scenario: Supplying 1.2 V to HDD controller ASIC during spin-up and active read/write phases. IC Role / Device Role / Timing Role: Local DC-DC regulator handling 1.0 A peak loads with fast transient response to prevent voltage droop. Use Value: 130 mΩ PMOS switch and 1.6 MHz frequency maintain >90% efficiency at full load, reducing thermal stress on drive PCB. | Use Scenario: Providing regulated 3.3 V supply to ADSL line driver and Ethernet PHY in residential gateway units. IC Role / Device Role / Timing Role: Compact, low-noise buck regulator powering mixed-signal analog and digital sections from 5 V input. Use Value: Soft-start and OVP protect sensitive line interface circuits during hot-plug or feedback 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 |
|---|---|---|---|
| TPS62231DRYR | 1.6 MHz, 0.6 V ref, 1.0 A, but uses synchronous rectification (no external diode needed); 12 µA quiescent current in operation vs 3.3 mA for LM2830X | Eliminates catch diode, reduces BOM count and footprint; better suited for high-efficiency, low-noise applications where diode loss matters | Select TPS62231DRYR when board space is critical and synchronous operation is acceptable; LM2830XQMFX/NOPB retains advantage in cost-sensitive, diode-tolerant designs |
| MP1471GJ-Z | 1.5 MHz, 0.8 V ref (not 0.6 V), 1.2 A rating, external compensation; no integrated soft-start or OVP | Requires external RC soft-start and overvoltage clamping; higher output voltage minimum limits low-Vcore use cases | Choose MP1471GJ-Z only when design flexibility (e.g., custom loop tuning) outweighs need for integrated protection and fixed 0.6 V reference |
Compared with TPS62231DRYR and MP1471GJ-Z, LM2830XQMFX/NOPB offers the lowest system cost for 0.6 V reference-based designs requiring integrated OVP, soft-start, and proven 1.0 A capability in SOT-23 - ideal for USB, modem, and consumer electronics where reliability and simplicity are prioritized over marginal efficiency gains.
Availability
LM2830XQMFX/NOPB is available at Aetrix Electronics and suitable for USB powered devices, set-top boxes, and DSL modems requiring stable component supply, long-term lifecycle support, and automotive-grade alternatives (LM2830X-Q1) for extended temperature operation.
Supply support for LM2830XQMFX/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 designing analog ICs, embedded processors, and power management solutions for industrial, automotive, and consumer applications.
The LM2830 product line delivers compact, high-frequency buck regulators optimized for space-constrained point-of-load conversion in portable and networked electronics - emphasizing ease of use, internal compensation, and robust protection features.
FAQ
What is the maximum output current supported by the LM2830XQMFX/NOPB?
The LM2830XQMFX/NOPB supports up to 1.0 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, VIN = 3.0–5.5 V). Its current limit is specified from 1.2 A (min) to 1.75 A (typ), ensuring reliable operation at full rated load. Derating is required above 85°C ambient due to thermal constraints in the SOT-23 package.
Does the LM2830XQMFX/NOPB require an external catch diode?
Yes, the LM2830XQMFX/NOPB requires an external Schottky catch diode connected between SW and GND. It uses an asynchronous architecture with an internal PMOS switch but no synchronous rectifier. A low-VF Schottky diode (e.g., 0.3–0.5 V forward drop, ≥1.5 A rating) is mandatory for proper operation and efficiency.
What is the purpose of the EN pin on the LM2830XQMFX/NOPB?
The EN pin on the LM2830XQMFX/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. The pin must never float and should be tied to VIN via a 100 kΩ resistor if always enabled.
Can the LM2830XQMFX/NOPB operate with a 3.3 V input to generate 1.2 V output?
Yes, the LM2830XQMFX/NOPB operates with 3.3 V input to deliver 1.2 V output. Its 3.0–5.5 V input range and 0.6 V internal reference support this configuration. At 3.3 V→1.2 V, the duty cycle is ~38%, well within the 5–94% range, and efficiency remains >88% per typical characteristics in the datasheet.
How does the LM2830XQMFX/NOPB handle thermal overload?
The LM2830XQMFX/NOPB incorporates thermal shutdown that disables the internal PMOS switch when junction temperature exceeds 165°C. Operation resumes automatically once the die cools to approximately 150°C. This hysteresis prevents cycling and protects the IC during sustained overload or inadequate PCB copper area.
LM2830XQMFX/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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM2830XQMFX/NOPB FAQ
1.How can I place an order for LM2830XQMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2830XQMFX/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 LM2830XQMFX/NOPB reliable?
The price and inventory of LM2830XQMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2830XQMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2830XQMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2830XQMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2830XQMFX/NOPB?
LM2830XQMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2830XQMFX/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 LM2830XQMFX/NOPB?
For technical support, including LM2830XQMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2830XQMFX/NOPB requirements.
6.How does Aetrix verify that LM2830XQMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2830XQMFX/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 LM2830XQMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2830XQMFX/NOPB?
All LM2830XQMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2830XQMFX/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 LM2830XQMFX/NOPB part is unused and in its original packaging.
Return procedure for LM2830XQMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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