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Monolithic Power Systems Inc. MP2497GN-A-P
- Part No.:
- MP2497GN-A-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MP2497GN-A-P.pdf
- Description:
- IC REG BUCK ADJ 3A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,761
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Product details
Overview
MP2497GN-A-P from Monolithic Power Systems is a 3A, 50V, 100kHz monolithic step-down DC/DC converter with programmable output overvoltage protection (OVP), internal 0.15Ω MOSFET switch, and output line drop compensation. It delivers stable 0.8–25V adjustable output across 4.5–50V input, supports hiccup-mode current limiting, and targets automotive cigarette lighter adapters and USB power supplies requiring robust fault protection and wide VIN range.
For engineers reviewing the MP2497GN-A-P datasheet, MP2497GN-A-P pinout, MP2497GN-A-P application, or MP2497GN-A-P equivalent, key selection criteria include its programmable OVP threshold (1.23V reference), 100ms soft-start timing, thermal shutdown at 150°C, and SOIC8E package with exposed pad for thermal management - all critical for high-reliability 12V/24V/48V industrial and automotive power designs.
Technical Context
The MP2497GN-A-P implements current-mode control with fixed 100kHz switching frequency, integrated error amplifier, slope compensation, and PWM comparator. Its ISP/ISN differential current sense inputs enable precise load-current monitoring for both hiccup current limiting and programmable line-drop compensation via external RSENSE and feedback resistor scaling.
It features dual-protection architecture: OVP triggers immediate high-side switch disable when OVP pin voltage exceeds 1.23V (set by external divider), while thermal shutdown activates at 150°C with 30°C hysteresis. The internal bootstrap regulator charges the BST capacitor, supporting gate drive above VIN for the integrated N-channel MOSFET.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 50V - supports direct connection to automotive battery (12V/24V) and industrial 48V rails without pre-regulation. |
| Output Current | 3A continuous - sustained delivery under full load with thermal shutdown protection at 150°C junction temperature. |
| Switching Frequency | Fixed 100kHz - enables predictable EMI filtering and simplifies inductor selection (e.g., 33µH typical). |
| Feedback Reference | 0.8V ±2.5% - sets output voltage via external resistor divider; low tolerance ensures tight regulation across temperature. |
| OVP Threshold Reference | 1.23V - programmable overvoltage trip point; allows setting VOVP from 5V to 28V using standard resistor ratios. |
| Current Sense Threshold | 100mV - defines hiccup current limit; enables accurate sensing with external RSENSE or inductor DCR. |
| Soft Start Time | Internal 4ms - prevents inrush current during startup; eliminates need for external SS capacitor. |
| Thermal Shutdown Hysteresis | 30°C - ensures safe restart after cooling; avoids thermal oscillation during overload conditions. |
Pinout & Package
MP2497GN-A-P is housed in an SOIC8E package with exposed thermal pad, optimized for PCB heat dissipation and high-voltage isolation. Pin 2 (GND) and the exposed pad must be connected to a solid ground plane for thermal and noise performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Unregulated Input Supply | Accepts 4.5–50V; powers internal circuitry and serves as drain node for internal MOSFET - requires local 4.7µF ceramic bypass. |
| GND (Pin 2 + Exposed Pad) | Power & Signal Ground Reference | Primary voltage reference for FB, OVP, and current sense; exposed pad must be soldered to thermal ground plane for θJA = 50°C/W. |
| FB (Pin 3) | Feedback Input | Senses output voltage via resistor divider; regulates VOUT to 0.8V reference; disables switching if FB < 0.25V (fault foldback). |
| OVP (Pin 4) | Overvoltage Protection Input | Monitors output via external divider; trips at 1.23V reference to disable SW and latch off after timer delay. |
| ISN (Pin 5) | Negative Current Sense Input | Differential input with ISP; measures voltage drop across RSENSE or inductor DCR for current limiting and line-drop compensation. |
| ISP (Pin 6) | Positive Current Sense Input | Differential input with ISN; enables bidirectional current monitoring and programmable short-circuit current reduction via RS1/RS2. |
| BST (Pin 7) | Bootstrap Capacitor Connection | Connects to SW via 10nF capacitor; provides floating gate drive voltage >VIN for internal high-side MOSFET. |
| SW (Pin 8) | Switch Node Output | Source of internal N-MOSFET; connects to inductor and external Schottky diode; high dv/dt node requiring careful layout. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Output OVP | Settable VOVP threshold (e.g., 6V) via external resistor divider on OVP pin - protects downstream 5V USB loads from overvoltage faults. |
| Output Line Drop Compensation | Compensates trace resistance-induced voltage drop (e.g., 50mΩ) by injecting current into FB divider - maintains ±10mV load regulation at 3A. |
| Hiccup-Mode Current Limit | Auto-restarts after fault clearance; limits average short-circuit current to <1.5A using RS1/RS2 resistors - reduces thermal stress during sustained overload. |
| Stable with Ceramic Output Caps | Supports low-ESR X5R/X7R ceramics (e.g., 100µF) without external compensation - simplifies BOM and improves transient response. |
| Integrated 0.15Ω Power MOSFET | Eliminates external high-side switch; achieves >90% efficiency at 12V→5V/3A - reduces board area and component count. |
| Internal 4ms Soft Start | Prevents input inrush and output overshoot without external capacitor - accelerates design validation and reduces test overhead. |
Applications
| Automotive Cigarette Lighter Adapter | USB-C Power Delivery Front-End |
|---|---|
|
Use Scenario: 12V vehicle battery powering 5V/3A USB charging port with long wiring harnesses. IC Role / Device Role / Timing Role: Primary buck regulator providing regulated 5V output; performs line-drop compensation to maintain 5.0V ±50mV at connector despite 150mΩ cable resistance. Use Value: Eliminates need for remote-sense wiring or post-regulator LDOs; sustains full 3A output even at cold cranking (6.5V VIN min). |
Use Scenario: Industrial USB hub requiring 5V/3A from 24V factory power rail with EMI-sensitive analog circuits nearby. IC Role / Device Role / Timing Role: Fixed-frequency (100kHz) buck controller minimizing conducted EMI; uses ceramic caps and internal MOSFET to avoid ferrite bead dependency. Use Value: Meets CISPR-22 Class B emissions without shielding; thermal shutdown prevents field failure during ambient >85°C operation. |
| Linear Charger Power Supply | Industrial 48V-to-12V Conversion |
|
Use Scenario: 24V supply stepping down to 12.6V for Li-ion linear charger IC with tight voltage tolerance. IC Role / Device Role / Timing Role: Adjustable-output buck converter (0.8–25V); sets 12.6V via FB divider; uses OVP to clamp at 13.2V during charger fault. Use Value: Prevents battery overcharge during charger IC failure; hiccup mode avoids thermal runaway in enclosed enclosures. |
Use Scenario: DIN-rail mounted PLC converting 48V DC to 12V for I/O modules with 3A peak demand. IC Role / Device Role / Timing Role: High-input-voltage buck regulator operating at 48V VIN; leverages 50V rating and SOIC8E thermal pad for convection-only cooling. Use Value: Achieves 89% efficiency at 48V→12V/3A; eliminates need for heatsink or forced air - reduces system cost and footprint. |
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 VIN, 2A output, no line-drop compensation, 500kHz fSW | Better suited for space-constrained 5V/2A consumer devices; lacks OVP programmability and ISP/ISN pins | Select when size and higher frequency outweigh need for 50V rating and load compensation. |
| LM5164QPWPRQ1 | Automotive-grade (AEC-Q100), 100V VIN, 0.6A, external MOSFET required | Targets harsh-environment automotive body control; requires external high-side FET and compensation network | Choose for ASIL-B systems needing extended VIN range and qualification - not drop-in compatible. |
Compared with MP2497GN-A-P, MP2494DN-LF-P trades input voltage headroom and compensation capability for smaller size and higher frequency, while LM5164QPWPRQ1 adds automotive qualification and 100V tolerance at the cost of complexity and lower current capability - making MP2497GN-A-P optimal for cost-sensitive 3A industrial/automotive buck applications needing integrated protection and line compensation.
Availability
MP2497GN-A-P is available at Aetrix Electronics and suitable for automotive cigarette lighter adapters, USB power supplies, and industrial 48V-to-12V conversion requiring stable component supply, RoHS-compliant packaging, and long-term lifecycle support.
Supply support for MP2497GN-A-P 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 automotive applications.
The MP2497GN-A-P belongs to MPS's MP249x family of high-voltage buck converters designed for rugged industrial and automotive power systems where wide input range, integrated protection, and layout simplicity are critical.
FAQ
What is the maximum recommended output voltage for MP2497GN-A-P when VIN ≤ 26.5V?
The datasheet specifies that for VIN ≤ 26.5V, the maximum output voltage is VIN – 1.5V. For example, at VIN = 24V, VOUT must not exceed 22.5V. This limitation ensures sufficient headroom for the internal control loop and prevents instability due to reduced duty cycle margin.
Can MP2497GN-A-P operate without an external bootstrap diode?
Yes - the internal bootstrap regulator can charge the BST capacitor in most applications. However, an external diode (e.g., BAT54) is recommended when VIN ≤ 5V, VOUT > 12V, or duty cycle exceeds 65%, as it improves gate drive strength and efficiency under high-stress conditions.
How is output line drop compensation implemented using ISP and ISN pins?
ISP and ISN form a differential current sense pair. A current proportional to load current (set by RSENSE and GLLC = 20μA/V) is injected into the FB divider's top resistor (R1), raising VFB to counteract trace voltage drop - maintaining constant VLOAD independent of current up to 3A.
What is the minimum recommended input capacitance for MP2497GN-A-P?
A 4.7µF X5R/X7R ceramic capacitor placed close to VIN and GND is the minimum recommended value. Larger values (e.g., 10–22µF) improve surge current handling and reduce input ripple, especially at high VIN or heavy load transients.
Does MP2497GN-A-P support synchronization to an external clock?
No - MP2497GN-A-P has a fixed internal 100kHz oscillator and does not provide SYNC or CLKIN functionality. Frequency adjustment is not supported; designs requiring synchronization must use alternative parts like MPQ4470-A or MPQ4423-A.
What happens during an output short-circuit condition?
When VSENSE exceeds 100mV, the hiccup current limit disables the high-side switch. After FB drops below 0.3V, the internal soft-start resets and the device restarts. This cycle repeats until the fault clears - limiting average short-circuit current and preventing thermal damage.
Is the SOIC8E package lead-free and RoHS-compliant?
Yes - MP2497GN-A-P is fully lead-free and complies with the RoHS directive. The SOIC8E package uses matte tin plating and meets JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) requirements.
MP2497GN-A-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- 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-SOIC-EP
MP2497GN-A-P FAQ
1.How can I place an order for MP2497GN-A-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP2497GN-A-P 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-P reliable?
The price and inventory of MP2497GN-A-P 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-P is usually 5 days.
3.What payment methods are accepted for MP2497GN-A-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP2497GN-A-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP2497GN-A-P?
MP2497GN-A-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP2497GN-A-P 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-P?
For technical support, including MP2497GN-A-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP2497GN-A-P requirements.
6.How does Aetrix verify that MP2497GN-A-P is sourced from the original manufacturer or authorized distributors?
All MP2497GN-A-P 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-P meets industry standards.
7.What is the process for return or replacement of MP2497GN-A-P?
All MP2497GN-A-P units undergo pre-shipment inspection (PSI). If there is an issue with MP2497GN-A-P, 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-P part is unused and in its original packaging.
Return procedure for MP2497GN-A-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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