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Texas Instruments LM2830ZMF
- Part No.:
- LM2830ZMF
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
LM2830ZMF.pdf
- Description:
- IC REG BUCK ADJ 1A SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,520
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Product details
Overview
LM2830ZMF 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 (±2%), and 130 mΩ integrated PMOS switch. It regulates 5 V input to stable 3.3 V output in compact local power supplies for USB-powered devices and set-top boxes.
For engineers reviewing the LM2830ZMF datasheet, LM2830ZMF pinout, LM2830ZMF application, or LM2830ZMF equivalent, key selection considerations include its 3.0 MHz operation enabling ultra-small external inductors/capacitors, thermal shutdown at 165°C, 30 nA shutdown current, 2.73 V UVLO turn-on threshold, and feedback voltage accuracy critical for precision output regulation.
Technical Context
The LM2830ZMF employs 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 supports minimum on-times of ~30 ns, enabling stable operation down to 0.6 V output across 3.0–5.5 V input range.
It integrates pulse-by-pulse current limiting (1.75 A typical), soft-start (600 µs ramp), overvoltage protection (15% above VREF), and undervoltage lockout with 430 mV hysteresis. The EN pin provides logic-level shutdown with 30 nA quiescent current.
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 minimal PCB footprint |
| Output Current | 1.0 A continuous - supports core power in HDDs and USB peripherals without external boost |
| Feedback Voltage | 0.600 V ±2% - sets output via resistor divider; enables precise 3.3 V, 1.2 V, or other values from 0.6 V to 4.5 V |
| 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 |
| PMOS RDS(ON) | 130 mΩ - limits conduction loss at 1 A, supporting ≥93% peak efficiency at 5 V→3.3 V |
| Shutdown Current | 30 nA - enables battery-backed systems to maintain >1-year shelf life without significant drain |
| UVLO Threshold | 2.73 V (rising), 2.3 V (falling) - prevents erratic startup during brown-out; 430 mV hysteresis avoids oscillation |
Pinout & Package
LM2830ZMF uses the 5-pin SOT-23 package (2.90 mm × 1.60 mm), optimized for space-constrained applications. Thermal performance is characterized by RθJA = 165.2°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switch node output | Drives inductor and catch diode; swings from VIN to –0.3 V during off-time; requires low-inductance layout |
| GND | Signal and power ground | Reference for FB, EN, and internal circuits; bottom resistor of feedback divider must connect here |
| FB | Feedback input | Senses output voltage via resistor divider; 0.1–100 nA bias current allows high-value resistors for low quiescent loss |
| EN | Enable control input | Active-high logic interface; must not float or exceed VIN + 0.3 V; pulls device into 30 nA shutdown when low |
| VIN | Power input supply | Accepts 3.0–5.5 V; powers internal LDO and gate driver; requires local 22 µF ceramic bypass capacitor |
Key Features
| Feature | Design Value |
|---|---|
| 3.0 MHz fixed-frequency PWM | Enables <3.3 µH inductors and eliminates audible noise; reduces EMI filtering burden vs lower-frequency alternatives |
| Internal soft-start (600 µs) | Controls output ramp rate to limit inrush current into large output capacitors, preventing input rail collapse |
| Pulse-by-pulse current limit | Protects internal PMOS during short-circuit or overload; 1.2 A min / 1.75 A typ limit ensures robustness without external sensing |
| Overvoltage protection (OVP) | Shuts down SW if FB exceeds 0.69 V (15% above 0.6 V), preventing damage to downstream 3.3 V logic during feedback fault |
| Thermal shutdown (165°C) | Disables switching until junction cools to ~150°C; prevents permanent damage during sustained overload or poor heatsinking |
Applications
| Local 5-V to Vcore Step-Down Converters | Core Power in HDDs |
|---|---|
Use Scenario: Converting 5 V USB or SATA bus power to 1.2 V or 1.8 V for HDD controller ASICs and motor drivers. IC Role / Device Role / Timing Role: Primary buck regulator providing tightly regulated, low-noise core voltage with fast transient response to handle bursty disk access loads. Use Value: 3.0 MHz switching minimizes output ripple and enables small 22 µF ceramic output caps, reducing board area and cost vs lower-frequency solutions. | Use Scenario: Supplying 3.3 V at 1.0 A to HDD spindle motor drivers and servo control circuitry in portable storage enclosures. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC-DC converter operating continuously under ambient temperatures up to 70°C. Use Value: 130 mΩ RDS(ON) and 93% peak efficiency minimize self-heating; thermal shutdown protects against enclosure overheating. |
| Set-Top Boxes | USB Powered Devices |
Use Scenario: Generating 3.3 V and 1.2 V rails from 5 V USB-C or wall adapter input in compact STB mainboards. IC Role / Device Role / Timing Role: Secondary point-of-load regulator delivering stable, low-ripple power to SoC I/O and memory interfaces. Use Value: SOT-23 package fits tight layout constraints; 30 nA shutdown current extends standby time when STB enters deep sleep mode. | Use Scenario: Powering portable USB peripherals (e.g., hubs, dongles, audio adapters) directly from host 5 V bus. IC Role / Device Role / Timing Role: Compact, self-contained buck converter eliminating need for external MOSFETs or controllers. Use Value: Integrated 130 mΩ PMOS and internal compensation reduce BOM count to just 5 components (inductor, diode, 2 caps, 2 resistors). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2830XMF | 1.6 MHz switching frequency; identical pinout, package, and feature set except oscillator frequency | Better efficiency at light loads due to lower switching loss; larger inductor/capacitor required for same ripple | Select LM2830XMF when board space allows slightly larger passives and priority is peak efficiency over minimal footprint |
| TPS62231DRVR | 3.0 MHz, 1.0 A, 0.6 V reference, but uses synchronous rectification (no external diode needed); 6-pin WSON package | Eliminates catch diode, reducing component count and improving efficiency at medium-to-heavy loads | Choose TPS62231DRVR when simplifying bill-of-materials and improving full-load efficiency outweighs SOT-23 footprint preference |
Compared with LM2830XMF, the LM2830ZMF trades marginally higher switching loss for significantly smaller external components; versus TPS62231DRVR, it retains the proven diode-based architecture for cost-sensitive designs where synchronous FET integration isn't required.
Availability
LM2830ZMF is available at Aetrix Electronics and suitable for USB powered devices, set-top boxes, and local 5-V to Vcore step-down converters requiring stable component supply, long-term lifecycle support, and automotive-grade reliability validation.
Supply support for LM2830ZMF 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 and embedded processing products for industrial, automotive, and consumer applications.
The LM2830 product line delivers high-frequency, monolithic buck regulators targeting space-constrained, efficiency-critical local power supplies in portable and USB-powered electronics.
FAQ
What is the switching frequency of the LM2830ZMF and how does it affect external component selection?
The LM2830ZMF operates at a fixed 3.0 MHz switching frequency. This high frequency allows use of very small external components-typically a 3.3 µH inductor and 22 µF ceramic input/output capacitors-reducing total solution size and cost. It also minimizes output voltage ripple and improves transient response compared to lower-frequency regulators. The LM2830ZMF datasheet specifies exact inductor saturation current and capacitor ESL requirements to maintain stability at this frequency.
How does the LM2830ZMF achieve precise output voltage regulation?
The LM2830ZMF achieves precise regulation using an internal 0.600 V ±2% voltage reference and a high-gain error amplifier that compares feedback voltage (from an external resistor divider on the FB pin) to this reference. With typical FB bias current below 100 nA, high-value resistors can be used to minimize divider power loss while maintaining accuracy. The current-mode control architecture further enhances line and load regulation, achieving <±1% output deviation across full temperature and load range.
Can the LM2830ZMF be used in automotive applications?
The LM2830ZMF itself is not AEC-Q100 qualified; however, the pin-compatible LM2830Z-Q1 variant is Grade 1 qualified (–40°C to +125°C junction). For non-automotive industrial or consumer applications, the LM2830ZMF operates reliably from –40°C to +125°C junction temperature and includes thermal shutdown at 165°C. Always verify ambient conditions, PCB thermal design, and derating per the LM2830ZMF thermal metrics table before deployment.
What protection features are built into the LM2830ZMF?
The LM2830ZMF integrates multiple protection features: pulse-by-pulse current limiting (1.2 A min), thermal shutdown (165°C trip, ~150°C recovery), output overvoltage protection (shuts down SW if FB exceeds 0.69 V), and undervoltage lockout (2.73 V turn-on with 430 mV hysteresis). These functions operate autonomously without external components, ensuring robust operation during faults, start-up, or abnormal input conditions.
Is an external catch diode required for the LM2830ZMF, and what specifications should it meet?
Yes, the LM2830ZMF requires an external Schottky catch diode (D1) because it uses asynchronous rectification. The diode must handle peak current IOUT × (1 − D), where D ≈ VOUT/VIN; for 5 V → 3.3 V, this is ~0.34 A. Select a Schottky diode with ≤0.4 V forward voltage (e.g., Toshiba CRS08), ≥30 V reverse rating, and 1.5 A average current capability. Low VF directly improves efficiency, especially at higher loads.
LM2830ZMF 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
LM2830ZMF FAQ
1.How can I place an order for LM2830ZMF through Aetrix?
Please submit a Request for Quotation (RFQ) for LM2830ZMF 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 LM2830ZMF reliable?
The price and inventory of LM2830ZMF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM2830ZMF is usually 5 days.
3.What payment methods are accepted for LM2830ZMF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM2830ZMF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM2830ZMF?
LM2830ZMF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM2830ZMF 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 LM2830ZMF?
For technical support, including LM2830ZMF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM2830ZMF requirements.
6.How does Aetrix verify that LM2830ZMF is sourced from the original manufacturer or authorized distributors?
All LM2830ZMF 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 LM2830ZMF meets industry standards.
7.What is the process for return or replacement of LM2830ZMF?
All LM2830ZMF units undergo pre-shipment inspection (PSI). If there is an issue with LM2830ZMF, 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 LM2830ZMF part is unused and in its original packaging.
Return procedure for LM2830ZMF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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