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Texas Instruments LM2830ZMFX/NOPB
- Part No.:
- LM2830ZMFX/NOPB
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2830ZMFX/NOPB.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,743
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Product details
Overview
LM2830ZMFX/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 3.0 MHz fixed switching frequency, 0.6 V internal reference voltage (±2%), and 130 mΩ integrated 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.
For engineers reviewing the LM2830ZMFX/NOPB datasheet, LM2830ZMFX/NOPB pinout, LM2830ZMFX/NOPB application, or LM2830ZMFX/NOPB equivalent, key selection criteria include its 3.0 MHz switching frequency enabling ultra-small external magnetics, thermal shutdown at 165°C, 30 nA shutdown current, cycle-by-cycle current limit (1.2–1.75 A), and internal soft-start (600 µs ramp).
Technical Context
The LM2830ZMFX/NOPB implements constant-frequency current-mode control with internal compensation, using a 0.6 V reference and feedback divider to regulate output voltage. Its 3.0 MHz oscillator enables sub-microsecond on-times (~30 ns minimum), supporting high duty-cycle operation down to 0.6 V output while maintaining stability with minimal external components.
It integrates undervoltage lockout (UVLO rising threshold 2.73 V, hysteresis 430 mV), overvoltage protection (15% above VREF), and thermal shutdown with automatic recovery at ~150°C. The EN pin provides logic-level enable/disable control with 100 nA bias current and 0.4 V shutdown threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 3.0 MHz - Enables use of ≤3.3 µH inductors and 22 µF ceramic capacitors for <10 mm² solution size. |
| Output Current | 1.0 A continuous - Supported by 130 mΩ PMOS switch and cycle-by-cycle current limit (min 1.2 A). |
| Input Voltage Range | 3.0 V to 5.5 V - Matches USB 5 V and Li-ion battery systems; UVLO prevents startup below 2.73 V. |
| Feedback Reference | 0.600 V ±2% - Sets output via resistor divider; enables 0.6–4.5 V adjustment with <1% line regulation (0.02%/V). |
| Quiescent Current | 4.3–6.5 mA (active), 30 nA (shutdown) - Minimizes standby loss in battery-powered applications. |
| Thermal Shutdown | 165°C activation, ~150°C recovery - Protects against sustained overload without requiring external thermal management. |
| Package | SOT-23 (5-pin), 2.90 mm × 1.60 mm - Standardized footprint compatible with automated assembly and space-constrained PCBs. |
Pinout & Package
LM2830ZMFX/NOPB uses a 5-pin SOT-23 package with exposed pad not connected internally; thermal performance relies on PCB copper area under the package body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node output | Drives external inductor and catch diode; swings from VIN to –0.5 V during off-time; requires low-inductance layout. |
| GND | Signal and power ground | Primary return path for feedback network and internal circuitry; bottom resistor of FB divider must connect here directly. |
| FB | Feedback input | Monitors output via resistor divider; 0.1–100 nA bias current enables high-impedance dividers without error. |
| EN | Enable control input | Active-high logic interface; 0.4 V threshold ensures reliable disable; must not float or exceed VIN + 0.3 V. |
| VIN | Power input supply | Supplies both control circuitry and PMOS switch; accepts 3.0–5.5 V with 7 V absolute max rating. |
Key Features
| Feature | Design Value |
|---|---|
| 3.0 MHz fixed-frequency PWM | Enables <10 mm² total solution size using 3.3 µH inductor and 22 µF X5R MLCCs; eliminates audible noise. |
| Internal soft-start (600 µs) | Controls output ramp rate to limit inrush current into large output capacitors; prevents input rail sag during startup. |
| Overvoltage protection (15% above VREF) | Disables SW immediately if FB exceeds 0.69 V, protecting downstream 3.3 V or 1.8 V loads from fault conditions. |
| Cycle-by-cycle current limit | Detects peak switch current ≥1.2 A each cycle, preventing MOSFET failure during short-circuit or overload events. |
| Ultra-low shutdown current (30 nA) | Allows >1-year battery life in always-on IoT sensors powered from coin cells when LM2830ZMFX/NOPB is disabled. |
Applications
| USB-Powered Devices | Set-Top Boxes |
|---|---|
Use Scenario: Regulating 5 V USB input to 3.3 V for microcontroller, Wi-Fi module, and sensor interfaces in portable media adapters. IC Role / Device Role / Timing Role: Primary point-of-load buck regulator providing stable 3.3 V @ 1.0 A with fast transient response to burst data transmission. Use Value: 3.0 MHz switching minimizes EMI coupling into RF sections; 30 nA shutdown extends battery backup runtime during standby. | Use Scenario: Generating 1.2 V core voltage for SoC in low-cost digital cable receivers with tight board area constraints. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating from 5 V rail, delivering regulated 1.2 V @ 1.0 A with ±1% accuracy over temperature. Use Value: Internal 0.6 V reference and current-mode control ensure <2% output deviation across load steps from 10 mA to 1.0 A. |
| HDD Core Power | DSL Modems |
Use Scenario: Supplying 1.8 V to HDD controller ASIC in external storage enclosures powered via USB 3.0. IC Role / Device Role / Timing Role: Local DC-DC regulator handling dynamic load transients during disk spin-up and data read/write bursts. Use Value: 130 mΩ PMOS switch and 3.0 MHz frequency deliver >90% efficiency at 1.0 A, reducing thermal load on enclosure plastic housing. | Use Scenario: Converting 5 V adapter output to 3.3 V for PHY, DSP, and memory in residential DSL gateways with fanless design. IC Role / Device Role / Timing Role: Main system regulator supporting 100% duty cycle capability down to 0.6 V output for future voltage scaling. Use Value: Thermal shutdown and overvoltage protection eliminate need for external supervision circuits, lowering BOM cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYT | 2.25–6.0 V input, 3.0 MHz, 0.6 V ref, but 0.8 A max output current and 200 mΩ switch RDS(on). | Lower output current limits use in 3.3 V/0.8 A applications; less suitable for 1.0 A HDD core rails. | Select when lower cost and footprint priority outweigh 200 mA current margin. |
| RT8059GJ6 | 2.5–5.5 V input, 3.0 MHz, 0.6 V ref, 1.2 A output, but requires external compensation and has no OVP. | Lacks integrated overvoltage protection; demands additional design validation for safety-critical 3.3 V I/O rails. | Choose only when full control over loop dynamics is required and OVP is implemented externally. |
Compared with TPS62231DRYT and RT8059GJ6, LM2830ZMFX/NOPB delivers guaranteed 1.0 A output with integrated OVP and thermal shutdown in the smallest SOT-23 footprint, making it optimal for space- and reliability-constrained USB and broadband consumer electronics.
Availability
LM2830ZMFX/NOPB is available at Aetrix Electronics and suitable for USB-powered devices, set-top boxes, HDD core power, and DSL modems requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for LM2830ZMFX/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 LM2830 product line delivers compact, high-frequency buck regulators for space-constrained portable and consumer electronics, emphasizing minimal external component count, robust protection features, and automotive-grade variants (LM2830-Q1).
FAQ
What is the maximum output current supported by the LM2830ZMFX/NOPB?
The LM2830ZMFX/NOPB supports up to 1.0 A of continuous output current, enabled by its 130 mΩ integrated PMOS switch and cycle-by-cycle current limit with a minimum threshold of 1.2 A. Peak current capability reaches 1.75 A typical, allowing safe operation under transient loads without external current-sense components. This rating holds across the full –40°C to +125°C junction temperature range per datasheet specifications.
Does the LM2830ZMFX/NOPB require external compensation components?
No, the LM2830ZMFX/NOPB uses internal compensation and is optimized for stability with standard 22 µF ceramic output capacitors and typical 3.3 µH inductors. Its current-mode architecture and fixed 3.0 MHz switching frequency eliminate the need for external compensation networks, simplifying design and reducing bill-of-materials count. Layout best practices-such as minimizing SW node area and placing FB resistors close to GND-are sufficient for stable operation.
What protection features are integrated into the LM2830ZMFX/NOPB?
The LM2830ZMFX/NOPB integrates five key protections: (1) cycle-by-cycle current limiting (1.2–1.75 A), (2) thermal shutdown at 165°C with automatic recovery at ~150°C, (3) output overvoltage protection triggering at 15% above 0.6 V reference (i.e., 0.69 V), (4) undervoltage lockout with 2.73 V turn-on and 430 mV hysteresis, and (5) 30 nA ultra-low shutdown current to prevent battery drain. All functions operate autonomously without external components.
Can the LM2830ZMFX/NOPB be used with a 3.3 V input to generate 1.2 V output?
Yes, the LM2830ZMFX/NOPB supports 3.3 V input to generate 1.2 V output, as confirmed by its 3.0–5.5 V input range and 0.6–4.5 V adjustable output range. At 3.3 V input and 1.2 V output, the calculated duty cycle is ~36%, well within the device's 7–90% operational range. Efficiency exceeds 90% at 1.0 A load per typical characteristics, and the 3.0 MHz frequency ensures minimal output ripple with standard 22 µF X5R MLCCs.
What is the purpose of the EN pin on the LM2830ZMFX/NOPB?
The EN (Enable) pin on the LM2830ZMFX/NOPB provides logic-level control to start or stop switching operation. A voltage ≥1.8 V enables regulation; ≤0.4 V forces shutdown with only 30 nA quiescent current. The pin must not float and should be pulled to VIN via a 100 kΩ resistor if always-on operation is required. Its 100 nA bias current allows high-impedance microcontroller GPIO control without loading the driver.
LM2830ZMFX/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 3MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
LM2830ZMFX/NOPB FAQ
1.How can I place an order for LM2830ZMFX/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2830ZMFX/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 LM2830ZMFX/NOPB reliable?
The price and inventory of LM2830ZMFX/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2830ZMFX/NOPB is usually 5 days.
3.What payment methods are accepted for LM2830ZMFX/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2830ZMFX/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2830ZMFX/NOPB?
LM2830ZMFX/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2830ZMFX/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 LM2830ZMFX/NOPB?
For technical support, including LM2830ZMFX/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2830ZMFX/NOPB requirements.
6.How does Aetrix verify that LM2830ZMFX/NOPB is sourced from the original manufacturer or authorized distributors?
All LM2830ZMFX/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 LM2830ZMFX/NOPB meets industry standards.
7.What is the process for return or replacement of LM2830ZMFX/NOPB?
All LM2830ZMFX/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with LM2830ZMFX/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 LM2830ZMFX/NOPB part is unused and in its original packaging.
Return procedure for LM2830ZMFX/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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