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Monolithic Power Systems Inc. MP2497GN-A
- Part No.:
- MP2497GN-A
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2497GN-A.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOICE
- Quantity:
- Payment:
- Shipping:
Inventory:4,362
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Product details
Overview
MP2497GN-A from Monolithic Power Systems is a monolithic 100kHz step-down DC/DC converter with programmable output overvoltage protection (OVP), 3A continuous output current capability, 4.5V–50V input range, and integrated 0.15Ω high-side MOSFET. It delivers stable 0.8V–25V adjustable output voltage with line drop compensation and hiccup-mode current limiting-used in automotive cigarette lighter adapters and USB power supplies.
For engineers reviewing the MP2497GN-A datasheet, MP2497GN-A pinout, MP2497GN-A application, or MP2497GN-A equivalent, key selection criteria include its programmable OVP threshold (1.23V reference), SOIC8E thermal performance (θJA = 50°C/W), soft-start timing (4ms), and ISP/ISN-based current sensing for precision load regulation.
Technical Context
The MP2497GN-A implements fixed-frequency current-mode control with internal slope compensation, enabling stable operation across wide input/output conditions. Its error amplifier integrates FB voltage error against 0.8V reference, while PWM comparator compares sensed inductor current (via ISP/ISN) plus ramp signal to EA output.
OVP protection uses a dedicated 1.23V comparator referenced to the OVP pin; fault latching occurs after timer delay upon OVP trip. Line drop compensation injects programmable current into FB via ISP/ISN to offset trace IR loss-gain settable from 15–25μA/V by external RSENSE and RTRACE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 50V - supports 12V/24V/48V automotive and industrial rails without pre-regulation. |
| Output Current | 3A continuous - sustained at full load with SOIC8E package and proper PCB copper area. |
| Switching Frequency | Fixed 100kHz - enables predictable EMI filtering and avoids AM radio band interference. |
| Feedback Reference | 0.8V ±2.5% - sets output voltage accuracy; enables low-VOUT designs down to 0.8V with resistor divider. |
| OVP Threshold Reference | 1.23V ±13% - allows programmable overvoltage trip point via external resistor divider on OVP pin. |
| Current Sense Threshold | 100mV - defines hiccup current limit; configurable lower via RS1/RS2 for short-circuit current reduction. |
| Soft Start Time | 4ms typical - prevents inrush current during startup; internally generated, no external capacitor required. |
| Thermal Shutdown | 150°C with 30°C hysteresis - protects die under overload or poor heatsinking; auto-recovery after cooldown. |
Pinout & Package
MP2497GN-A is housed in an SOIC8E package with exposed thermal pad, optimized for surface-mount assembly and thermal dissipation (θJC = 10°C/W). The exposed pad must be soldered to a PCB ground plane for reliable operation at full 3A load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Power Input | 4.5V–50V unregulated supply; also powers internal circuitry and serves as switch drain node. |
| GND (Pin 2) | Ground Reference | Analog and power ground; exposed pad must connect to GND plane for thermal and noise integrity. |
| FB (Pin 3) | Feedback Input | Senses output voltage via resistor divider; regulates VOUT to 0.8V reference; enables line drop compensation. |
| OVP (Pin 4) | OVP Monitor Input | Connects to center tap of OVP resistor divider; triggers shutdown when voltage exceeds 1.23V reference. |
| ISN (Pin 5) | Negative Current Sense | Completes current-sense path with ISP; enables load-current-dependent feedback and short-circuit programming. |
| ISP (Pin 6) | Positive Current Sense | High-side current sense input; used with ISN for hiccup limit and line drop compensation current injection. |
| BST (Pin 7) | Bootstrap Supply | Connects to SW via 10nF capacitor; provides gate drive voltage >VIN for internal high-side MOSFET. |
| SW (Pin 8) | Switch Node | Drain of internal 0.15Ω MOSFET; connects to inductor; requires tight layout to minimize switching noise. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Output OVP | Set via external resistor divider on OVP pin using 1.23V internal reference-enables system-level fault isolation. |
| Output Line Drop Compensation | Adjusts FB voltage dynamically using ISP/ISN current injection; compensates trace resistance up to ~100mΩ. |
| Hiccup-Mode Current Limit | Shuts down SW on 100mV sense voltage exceedance, then auto-restarts after FB falls below 0.3V-prevents thermal runaway. |
| Stable with Ceramic Output Caps | Designed for low-ESR ceramic capacitors (X5R/X7R); eliminates need for electrolytic caps and improves reliability. |
| Internal Soft Start | 4ms built-in ramp-no external capacitor needed; ensures controlled VOUT rise and prevents input surge. |
| Fast Switching Edges | 3ns rise/fall times-minimizes switching losses and enables high-efficiency operation even at 50V input. |
Applications
| USB Power Supplies | Automotive Cigarette Lighter Adapters |
|---|---|
|
Use Scenario: 5V/3A USB charging port powered from vehicle battery (9V–16V nominal, up to 50V during load dump). IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5V output with OVP protection against alternator transients. Use Value: Maintains safe 5V output despite input surges; line drop compensation ensures stable voltage at USB connector despite long wiring harnesses. |
Use Scenario: Compact 12V-to-5V/3A adapter plugged into car cigarette lighter socket for powering tablets or dashcams. IC Role / Device Role / Timing Role: High-input-voltage step-down controller with hiccup protection against accidental short circuits in portable environments. Use Value: Survives cold-crank (4.5V) and load-dump (50V) events; SOIC8E package enables small form factor with minimal external components. |
| Power Supply for Linear Chargers | Industrial 24V-to-5V/3A Conversion |
|
Use Scenario: Pre-regulator stage feeding linear charger ICs (e.g., TP4056) requiring clean, stable 5V input. IC Role / Device Role / Timing Role: Efficient intermediate voltage source minimizing heat generation before final LDO or linear regulation. Use Value: Reduces thermal stress on downstream linear chargers; programmable OVP prevents damage to sensitive battery management circuitry. |
Use Scenario: DIN-rail mounted 24V industrial power supply delivering 5V/3A to PLC I/O modules or sensors. IC Role / Device Role / Timing Role: Robust primary DC/DC stage operating across extended temperature range (−40°C to +125°C junction). Use Value: Thermal shutdown and hiccup protection ensure field reliability; SOIC8E exposed pad supports conduction cooling in enclosed enclosures. |
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-P | Lower 36V max input, 2.5A output, no line drop compensation, same SOIC8E footprint. | Lacks ISP/ISN pins and OVP programmability-suitable only for fixed-output, non-compensated 5V/2.5A designs. | Select when input never exceeds 36V and line compensation is unnecessary; reduces BOM count but sacrifices flexibility. |
| LM5164QDDARQ1 | Automotive-grade (AEC-Q100), 100V input, 0.6A output, external MOSFET required, different pinout. | Requires external high-side FET and more support components; designed for harsh-environment automotive use. | Choose for ASIL-B systems needing 100V tolerance and qualification-adds complexity but meets automotive safety requirements. |
Compared with MP2494DN-LF-P, MP2497GN-A offers higher input voltage margin and critical line compensation; versus LM5164QDDARQ1, it delivers 5× output current in half the footprint but lacks AEC-Q100 certification-making it ideal for cost-sensitive industrial and consumer 50V-class buck applications.
Availability
MP2497GN-A is available at Aetrix Electronics and suitable for USB power supplies, automotive cigarette lighter adapters, and industrial 24V-to-5V conversion requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for MP2497GN-A 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 mixed-signal ICs for power management, motion control, and interface applications.
The MP2497GN-A belongs to MPS's high-voltage buck converter product line, engineered for robust operation in automotive, industrial, and consumer power systems where wide VIN range and fault resilience are critical.
FAQ
What is the maximum recommended output voltage for MP2497GN-A when input is 50V?
The datasheet specifies that for VIN > 26.5V, the maximum output voltage is 25V. At VIN = 50V, VOUT must not exceed 25V to maintain safe operation of internal circuitry and avoid overstressing the feedback and OVP comparators. This limit ensures reliable regulation and OVP functionality across the full input range.
Can MP2497GN-A operate with input voltage as low as 4.5V and still deliver 3A output?
Yes-MP2497GN-A is fully specified down to 4.5V input and maintains 3A continuous output capability. At low VIN, duty cycle approaches 100%, so thermal design becomes critical; the SOIC8E package requires adequate copper area and airflow to sustain full load without triggering thermal shutdown.
How is output overvoltage protection triggered and reset?
OVP triggers when voltage at the OVP pin exceeds 1.23V, causing immediate high-side switch turn-off. After a fixed internal timer delay, the device latches off. Recovery requires cycling EN (if used) or power cycling VIN-there is no automatic reset after fault removal, ensuring system-level fault containment.
Does MP2497GN-A require an external bootstrap diode?
An external bootstrap diode (e.g., BAT54) is recommended-not required-for applications with VIN ≤ 5V, VOUT > 12V, or duty cycle > 65%. It improves BST capacitor recharge efficiency and sustains gate drive under high-duty-cycle conditions, especially near VIN = VOUT.
What is the purpose of the ISP and ISN pins beyond current limiting?
ISP and ISN enable two functions: (1) hiccup-mode current limiting via 100mV sense threshold, and (2) programmable line drop compensation by injecting current into the FB node proportional to load current-allowing precise load-end voltage regulation across variable trace resistances.
Is MP2497GN-A RoHS-compliant and lead-free?
Yes-MP2497GN-A is lead-free and fully compliant with the EU RoHS directive. All MPS products meet RoHS requirements, and green status documentation is available on the Monolithic Power Systems website under Quality Assurance resources.
How does the internal soft start prevent inrush current?
The internal 4ms soft start gradually ramps the error amplifier reference, limiting peak inductor current during startup. This controls duty cycle growth and prevents large inrush into output capacitors-eliminating need for external soft-start circuitry while ensuring reliable turn-on across input and load conditions.
MP2497GN-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- 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
MP2497GN-A FAQ
1.How can I place an order for MP2497GN-A through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2497GN-A 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 MP2497GN-A reliable?
The price and inventory of MP2497GN-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP2497GN-A is usually 5 days.
3.What payment methods are accepted for MP2497GN-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2497GN-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2497GN-A?
MP2497GN-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2497GN-A 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 MP2497GN-A?
For technical support, including MP2497GN-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2497GN-A requirements.
6.How does Aetrix verify that MP2497GN-A is sourced from the original manufacturer or authorized distributors?
All MP2497GN-A 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 MP2497GN-A meets industry standards.
7.What is the process for return or replacement of MP2497GN-A?
All MP2497GN-A units undergo pre-shipment inspection (PSI). If there is an issue with MP2497GN-A, 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 MP2497GN-A part is unused and in its original packaging.
Return procedure for MP2497GN-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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