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Monolithic Power Systems Inc. MP2494DS-LF-Z
- Part No.:
- MP2494DS-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP2494DS-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 2A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,761
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Product details
Overview
MP2494DS-LF-Z from Monolithic Power Systems is a monolithic 2A, 55V input, 100kHz fixed-frequency step-down DC/DC converter with integrated 0.25Ω high-side MOSFET, 0.8V feedback reference, and cycle-by-cycle current limiting. It operates from 4.5V to 55V input, delivers adjustable output from 0.8V to 45V, and targets automotive cigarette lighter adapters and industrial USB power supplies.
For engineers reviewing the MP2494DS-LF-Z datasheet, MP2494DS-LF-Z pinout, MP2494DS-LF-Z application, or MP2494DS-LF-Z equivalent, key selection criteria include its 55V max input rating, SOIC8E package thermal performance (θJA = 50°C/W), 100ns minimum on-time, and bootstrap capacitor requirement for high-duty-cycle operation.
Technical Context
The MP2494DS-LF-Z implements peak-current-mode control with internal slope compensation and a 100kHz oscillator, enabling stable regulation across wide input/output ranges. Its error amplifier compares 0.8V bandgap reference against FB voltage, while the current sense amplifier monitors high-side switch conduction to enforce 3.5A cycle-by-cycle current limit.
Thermal shutdown activates at 150°C junction temperature, and UVLO has 3.3V nominal threshold with 200mV hysteresis. The device requires external BST capacitor between SW and BST pins and supports soft-start via SS pin capacitance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 55V - supports 12V/24V/48V industrial and automotive rails without pre-regulation |
| Output Current | 2A continuous - sufficient for dual-USB charging or small embedded systems |
| Switch RDS(ON) | 0.25Ω - enables high efficiency at 2A load with low conduction loss |
| Feedback Reference | 0.8V ±2% - allows precise output setting with standard resistor dividers |
| Switching Frequency | 100kHz fixed - simplifies EMI filtering and inductor selection vs. variable-frequency designs |
| Min On-Time | 100ns - supports high step-down ratios (e.g., 48V→3.3V) without pulse-skipping |
| Thermal Shutdown | 150°C - protects die during overload or poor PCB heatsinking |
Pinout & Package
MP2494DS-LF-Z is housed in an SOIC8E package (JEDEC MS-012, variation BA), offering improved thermal performance (θJA = 50°C/W) over standard SOIC8.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power input supply | Accepts 4.5–55V unregulated input; connects to input capacitor and internal high-side MOSFET drain |
| GND (Pin 2) | Power and signal reference | Return path for input/output currents and feedback reference; layout critical to avoid noise coupling |
| EN (Pin 3) | Enable control input | Logic-level on/off control: >1.8V enables, <0.4V disables; internal pull-up not present |
| FB (Pin 4) | Feedback sensing node | Monitors output via resistor divider; internal 2MΩ pull-up sets default bias when open |
| SS (Pin 5) | Soft-start timing node | Connects to external capacitor to linearly ramp output voltage and limit inrush current |
| GS (Pin 6) | Ground sense | Provides Kelvin connection to system ground to reject PCB trace resistance errors in feedback loop |
| BST (Pin 7) | Bootstrap supply | Forms floating gate drive supply with external capacitor between BST and SW pins |
| SW (Pin 8) | Switch node | Source of internal high-side MOSFET; connects to inductor and external bootstrap capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Low-EMI switching edges | Controlled slew rates reduce conducted/radiated emissions without external snubbers |
| Stable with ceramic output caps | Internal compensation works with low-ESR X5R/X7R capacitors, eliminating electrolytic dependency |
| Integrated power MOSFET | 0.25Ω RDS(ON) eliminates external high-side switch and associated gate driver complexity |
| Thermal and current protection | Auto-recovering thermal shutdown and cycle-by-cycle current limiting prevent damage under fault conditions |
| Wide input range support | 4.5–55V operation covers 12V automotive, 24V industrial, and 48V telecom inputs in one BOM item |
Applications
| Automotive Cigarette Lighter Adapters | Industrial USB Power Supplies |
|---|---|
Use Scenario: Converting 12V–24V vehicle battery to regulated 5V/9V/12V for mobile device charging. IC Role / Device Role / Timing Role: Primary buck regulator providing isolated, stabilized output with UVLO hysteresis for cold-crank immunity. Use Value: 55V absolute max input withstands load-dump transients up to 60V; SOIC8E package dissipates heat under sustained 2A load. | Use Scenario: Powering USB-C PD accessories or multi-port hubs in factory automation controllers. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller delivering precise 5V/9V outputs with fast transient response. Use Value: 0.8V feedback reference and GS pin enable accurate output regulation despite PCB trace resistance in DIN-rail mounted enclosures. |
| Ruggedized PoE Edge Devices | Smart Sensor Node Power |
Use Scenario: Down-converting 48V PoE++ (IEEE 802.3bt) to 3.3V/5V for Ethernet switches or IP cameras. IC Role / Device Role / Timing Role: High-input-voltage buck converter with 100ns min on-time supporting 48V→3.3V conversion at 100kHz. Use Value: 100kHz fixed frequency simplifies EMI filter design for Class A/B compliance; thermal shutdown prevents latch-up during ambient temperature spikes. | Use Scenario: Powering low-power wireless sensor nodes (BLE/Zigbee) from 12V or 24V field bus. IC Role / Device Role / Timing Role: Efficient step-down regulator with 800μA quiescent current and EN-controlled sleep mode. Use Value: 4–10μA shutdown current extends battery backup life; adjustable output supports diverse MCU/sensor VDD requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QWRGRRQ1 | 4.5–65V input, 1.5A, 1MHz switching, integrated FET but higher RDS(ON) (0.35Ω) | Higher frequency enables smaller magnetics but increases EMI filtering complexity | Select for space-constrained designs needing >1MHz operation; verify thermal margin at 2A load |
| TPS54260DGQR | 3.5–60V input, 2.5A, 100kHz, external FET required, no integrated BST diode | Requires external high-side MOSFET and bootstrap diode, increasing BOM count and layout sensitivity | Select when higher current headroom or discrete FET optimization is needed; adds design overhead |
Compared with LM5164QWRGRRQ1 and TPS54260DGQR, MP2494DS-LF-Z offers optimal balance of 2A capability, 55V rating, SOIC8E thermal performance, and full integration-reducing component count and layout risk for mid-power industrial and automotive converters.
Availability
MP2494DS-LF-Z is available at Aetrix Electronics and suitable for automotive cigarette lighter adapters, industrial USB power supplies, ruggedized PoE edge devices, and smart sensor node power requiring stable component supply and long-term manufacturability.
Supply support for MP2494DS-LF-Z 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
Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with global manufacturing and quality certifications including AEC-Q100 for automotive-grade products.
The MP2494 belongs to MPS's industrial-grade buck converter product line, designed specifically for reliable operation in harsh environments with wide input voltage ranges, robust protection features, and minimal external component count.
FAQ
What is the maximum recommended output voltage for MP2494DS-LF-Z?
The MP2494DS-LF-Z supports output voltages up to 45V, limited by its 0.8V feedback reference and external resistor divider. This is validated per the Recommended Operating Conditions table (VOUT = 0.8V to 45V) and confirmed by the 60V absolute maximum VIN rating, ensuring safe operation with sufficient headroom for transient suppression.
Does MP2494DS-LF-Z require an external bootstrap diode?
An external bootstrap diode is recommended-not mandatory-for applications with 5V fixed input, high duty cycle (>65%), or output voltage above 12V. The internal bootstrap regulator may be insufficient under these conditions, and adding a BAT54 or IN4148 improves gate drive strength and efficiency.
How does the GS (Ground Sense) pin improve regulation accuracy?
The GS pin provides a Kelvin connection to the system ground plane, separate from the power GND return path. This eliminates voltage drop errors caused by PCB trace resistance between the IC's GND pin and the true ground reference point, enabling precise 0.8V feedback regulation even with high-current PCB layouts.
What is the purpose of the SS (Soft-Start) pin and how is it configured?
SS pin controls output voltage ramp rate during startup by connecting an external capacitor. The capacitor value sets soft-start time: larger capacitance yields slower ramp, reducing inrush current and preventing input rail sag. Typical values range from 1nF to 100nF depending on required startup time and load capacitance.
Can MP2494DS-LF-Z operate with ceramic output capacitors only?
Yes. MP2494DS-LF-Z is internally compensated to remain stable with low-ESR ceramic output capacitors (X5R/X7R), eliminating the need for aluminum or tantalum electrolytics. This reduces size, improves reliability, and avoids aging-related capacitance drift in long-life industrial applications.
What is the thermal performance difference between SOIC8 and SOIC8E packages?
SOIC8E offers significantly better thermal performance: θJA = 50°C/W versus 90°C/W for SOIC8 (per Absolute Maximum Ratings table). This 45% lower junction-to-ambient resistance allows MP2494DS-LF-Z to sustain 2A continuous output at higher ambient temperatures or with less PCB copper area.
Is MP2494DS-LF-Z compliant with automotive qualification standards?
MP2494DS-LF-Z is not AEC-Q100 qualified. While it meets industrial temperature range (–40°C to +125°C) and includes automotive-relevant features like 60V abs max input and load-dump tolerance, formal automotive qualification requires specific stress testing and documentation not provided for this variant.
MP2494DS-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- 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):
- 4.5V
- Voltage - Input (Max):
- 55V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 45V
- Current - Output:
- 2A
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP2494DS-LF-Z FAQ
1.How can I place an order for MP2494DS-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2494DS-LF-Z 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 MP2494DS-LF-Z reliable?
The price and inventory of MP2494DS-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2494DS-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2494DS-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2494DS-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2494DS-LF-Z?
MP2494DS-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2494DS-LF-Z 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 MP2494DS-LF-Z?
For technical support, including MP2494DS-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2494DS-LF-Z requirements.
6.How does Aetrix verify that MP2494DS-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2494DS-LF-Z 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 MP2494DS-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2494DS-LF-Z?
All MP2494DS-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2494DS-LF-Z, 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 MP2494DS-LF-Z part is unused and in its original packaging.
Return procedure for MP2494DS-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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