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Monolithic Power Systems Inc. MP2497DN-LF-Z
- Part No.:
- MP2497DN-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2497DN-LF-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:2,502
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Product details
Overview
MP2497DN-LF-Z from Monolithic Power Systems is a 3A, 50V, 100kHz synchronous step-down DC/DC converter with programmable output over-voltage protection (OVP), internal 0.15Ω power MOSFET, and output line drop compensation. It operates across 4.5V–50V input, delivers adjustable 0.8V–25V output, and supports automotive cigarette lighter adapters and USB power supplies requiring robust fault protection.
For engineers reviewing the MP2497DN-LF-Z datasheet, MP2497DN-LF-Z pinout, MP2497DN-LF-Z application, or MP2497DN-LF-Z equivalent, key selection criteria include its 100kHz fixed switching frequency, hiccup-mode current limiting, thermal shutdown at 150°C, and SOIC8E package with exposed thermal pad for 2.5W power dissipation.
Technical Context
The MP2497DN-LF-Z implements current-mode control with integrated PWM comparator, error amplifier, and slope compensation to stabilize regulation under transient load changes. Its ISP/ISN differential current sense inputs enable precise 100mV threshold current limiting and programmable line-drop compensation via external RSENSE and feedback resistor networks.
It features a dedicated OVP comparator referenced to 1.23V, independent of FB loop dynamics, allowing fast high-side switch disable during overvoltage events. The internal bootstrap regulator charges the BST–SW capacitor, supporting gate drive above VIN while enabling operation up to 50V input without external diode-though an external diode (e.g., BAT54) is recommended for >12V VOUT or >65% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 50V - supports wide-range industrial and automotive battery inputs including 12V/24V/48V systems. |
| Output Current | 3A continuous - sustained delivery without external current-sense resistors or heatsinking in SOIC8E package. |
| Switching Frequency | Fixed 100kHz - enables predictable EMI filtering and simplifies inductor selection (e.g., 33µH standard value). |
| Feedback Reference | 0.8V ±2% - sets output voltage accuracy; low drift over temperature ensures stable regulation across -40°C to +125°C. |
| OVP Threshold | Programmable via resistor divider with 1.23V internal reference - allows precise 6V OVP setting (e.g., for 5V USB applications). |
| Current Sense Threshold | 100mV differential (ISP–ISN) - enables accurate hiccup-mode current limiting and short-circuit protection down to ~1.5A with 68mΩ RSENSE. |
| Thermal Shutdown | 150°C with 30°C hysteresis - protects die during overload or poor PCB thermal design; automatic recovery after cooldown. |
Pinout & Package
MP2497DN-LF-Z is housed in an SOIC8E (exposed pad) package, optimized for thermal performance with θJA = 50°C/W and θJC = 10°C/W on a 4-layer PCB. The exposed pad must be soldered to a solid GND plane for reliable 2.5W power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VIN | Unregulated input supply | Accepts 4.5V–50V; connects to input capacitor (CIN) placed adjacent to minimize voltage spikes and EMI. |
| 2 GND / Exposed Pad | Power and signal ground reference | Primary return path for switching current; exposed pad must be thermally connected to PCB GND plane. |
| 3 FB | Feedback voltage sensing node | Sets output voltage via resistor divider; internal 10nA bias current minimizes divider power loss. |
| 4 OVP | Over-voltage protection input | Monitors output via resistor divider; triggers immediate high-side switch disable if voltage exceeds 1.23V reference. |
| 5 ISN | Negative current sense input | Differential pair with ISP; senses voltage drop across RSENSE or inductor DCR for current limiting and line compensation. |
| 6 ISP | Positive current sense input | Completes differential current sense path; enables accurate 100mV threshold detection and programmable short-circuit current. |
| 7 BST | Bootstrap supply for high-side gate driver | Connected to SW via 0.1µF ceramic capacitor; internal regulator charges BST during SW low phase. |
| 8 SW | Switch node output | Drives external inductor; carries full switching current; requires short, low-inductance routing to minimize ringing and EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Output OVP | Configurable threshold (e.g., 6V) using two external resistors - eliminates need for external OVP IC in USB or automotive power designs. |
| Output Line Drop Compensation | Adjusts FB voltage based on load current via ISP/ISN - maintains constant voltage at remote load despite trace resistance up to ~50mΩ. |
| Hiccup-Mode Current Limit | Auto-restarts after fault removal with full soft-start - prevents thermal runaway during sustained overload or short circuit. |
| Low-EMI Switching Edges | Controlled 50ns rise/fall times and optimized gate drive - meets EN55022 Class B radiated emissions without added shielding or snubbers. |
| Stable with Ceramic Output Caps | Compatible with low-ESR X5R/X7R capacitors - avoids instability issues common with electrolytic caps and reduces board area. |
Applications
| USB Power Supplies | Automotive Cigarette Lighter Adapters |
|---|---|
|
Use Scenario: 5V/3A USB charging port powered from vehicle 12V battery with voltage transients up to 50V during load dump. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5V output with OVP set to 6V and hiccup current limit protecting against cable shorts. Use Value: Eliminates need for discrete OVP and current-limit circuits; SOIC8E thermal performance sustains 3A output without heatsink in confined dashboard space. |
Use Scenario: Portable 12V-to-5V adapter plugged into car cigarette lighter socket, subject to cold cranking (4.5V) and jump-start surges (up to 50V). IC Role / Device Role / Timing Role: Input-tolerant step-down controller delivering stable 5V with line-drop compensation to offset voltage drop across long adapter cables. Use Value: Maintains ≥4.95V at USB connector under full 3A load, even with 150mΩ cable resistance - critical for fast-charging compliance. |
| Power Supply for Linear Chargers | Industrial 24V-to-12V Conversion |
|
Use Scenario: Pre-regulator stage feeding a linear charger IC (e.g., MCP73831) in portable medical devices requiring ultra-low noise and precise voltage control. IC Role / Device Role / Timing Role: Efficient intermediate converter reducing thermal stress on downstream linear regulator; FB accuracy ensures ±1% charge voltage tolerance. Use Value: Reduces total power loss by >40% vs. direct linear regulation from 24V, extending battery life and easing thermal management. |
Use Scenario: DIN-rail mounted PLC I/O module converting 24V rail to 12V for sensor biasing, operating continuously in 70°C ambient industrial enclosures. IC Role / Device Role / Timing Role: High-input-voltage buck converter with thermal shutdown and 125°C junction rating ensuring reliability under sustained load. Use Value: SOIC8E package with exposed pad achieves 2.5W dissipation margin at 70°C ambient - avoids derating or forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP2494DN-LF-Z | Lower 36V max input, 2A output, no line-drop compensation, same SOIC8E package. | Suitable for 12V/24V-only systems where OVP and hiccup protection are needed but line compensation is unnecessary. | Select when input never exceeds 36V and full 3A capability or remote-load regulation is not required. |
| LM5164QDDARQ1 | Automotive-grade (AEC-Q100), 100V input, 0.6A output, external MOSFETs, 100kHz–2.2MHz programmable frequency. | Designed for harsh automotive environments with extended temp range and fault diagnostics; lower current necessitates external FETs for 3A. | Choose for ASIL-B systems requiring automotive qualification, higher input voltage margin, or frequency flexibility - not a drop-in replacement. |
Compared with MP2497DN-LF-Z, MP2494DN-LF-Z offers cost reduction at the expense of input range and line compensation, while LM5164QDDARQ1 provides automotive qualification and higher voltage headroom but requires external power stages and increases BOM count.
Availability
MP2497DN-LF-Z is available at Aetrix Electronics and suitable for USB power supplies, automotive cigarette lighter adapters, and industrial 24V-to-12V conversion requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for MP2497DN-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 core expertise in DC/DC converters, LED drivers, and motor drivers.
The MP2497 belongs to MPS's industrial-grade buck converter product line, designed for rugged, wide-input-voltage applications in automotive, industrial, and consumer power systems where reliability and integration are critical.
FAQ
What is the maximum output current capability of MP2497DN-LF-Z under continuous operation?
The MP2497DN-LF-Z delivers 3A continuous output current in SOIC8E package with proper PCB thermal design (4-layer board, exposed pad soldered to GND plane). At 25°C ambient, it sustains 3A with VIN=12V and VOUT=5V; derating applies above 70°C ambient per θJA=50°C/W.
Can MP2497DN-LF-Z operate with input voltage below 4.5V?
No - the absolute minimum operating input voltage is 4.5V, enforced by an under-voltage lockout (UVLO) threshold of 2.9V to 3.9V (rising) with 200mV hysteresis. Operation below 4.5V is not guaranteed and may result in erratic regulation or failure to start.
How is output over-voltage protection configured, and what happens during an OVP event?
OVP is configured using a resistor divider from VOUT to GND connected to the OVP pin, referencing an internal 1.23V comparator. When OVP pin voltage exceeds 1.23V, the high-side switch turns off immediately and the device enters latch-off mode after a timer delay - requiring power cycle or EN pin toggle to recover.
Does MP2497DN-LF-Z require an external bootstrap diode?
An external bootstrap diode (e.g., BAT54) is recommended for VOUT >12V, duty cycle >65%, or fixed 5V input systems to ensure reliable BST capacitor charging. It is not mandatory for 5V–12V outputs with VIN ≤24V, as the internal regulator suffices under typical conditions.
What is the purpose of the ISP and ISN pins beyond current limiting?
ISP and ISN provide differential current sensing for both hiccup-mode overcurrent protection and output line drop compensation. By injecting a current proportional to load current into the FB node via R1, they enable dynamic adjustment of output voltage to counteract IR drop across PCB traces or cables.
Is MP2497DN-LF-Z pin-compatible with MP2497DS-LF-Z?
No - MP2497DN-LF-Z uses SOIC8E (exposed pad) while MP2497DS-LF-Z uses standard SOIC8. Though pin functions match (VIN, GND, FB, OVP, ISN, ISP, BST, SW), the exposed pad on DN requires different PCB land pattern and thermal vias; mechanical and thermal designs are not interchangeable.
MP2497DN-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- 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):
- 50V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 25V
- Current - Output:
- 3A
- Frequency - Switching:
- 100kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOICE
MP2497DN-LF-Z FAQ
1.How can I place an order for MP2497DN-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2497DN-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 MP2497DN-LF-Z reliable?
The price and inventory of MP2497DN-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 MP2497DN-LF-Z is usually 5 days.
3.What payment methods are accepted for MP2497DN-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2497DN-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2497DN-LF-Z?
MP2497DN-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2497DN-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 MP2497DN-LF-Z?
For technical support, including MP2497DN-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2497DN-LF-Z requirements.
6.How does Aetrix verify that MP2497DN-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP2497DN-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 MP2497DN-LF-Z meets industry standards.
7.What is the process for return or replacement of MP2497DN-LF-Z?
All MP2497DN-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP2497DN-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 MP2497DN-LF-Z part is unused and in its original packaging.
Return procedure for MP2497DN-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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