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Monolithic Power Systems Inc. MP9488GS-P
- Part No.:
- MP9488GS-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP9488GS-P.pdf
- Description:
- IC REG BUCK ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:496
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Product details
Overview
MP9488GS-P from Monolithic Power Systems is a 7.5V to 450V wide-input, 300mA step-down regulator with integrated 500V MOSFET, peak-current/variable-off-time control, and full protection suite (thermal shutdown, UVLO, OLP, SCP, open-loop detection). It operates in buck, buck-boost, boost, and flyback topologies and targets high-voltage DC-DC conversion in scooters, e-bikes, solar energy systems, and industrial power supplies.
For engineers reviewing the MP9488GS-P datasheet, MP9488GS-P pinout, MP9488GS-P application, or MP9488GS-P equivalent, this page delivers verified technical context, SOIC-8 package mapping, real-world topology flexibility, light-load efficiency behavior, and validated alternative options for high-input-voltage offline regulator selection.
Technical Context
The MP9488GS-P employs peak-current sensing with variable off-time control to regulate output voltage across wide input ranges (7.5V–450V), using an internal 500V MOSFET and high-voltage startup circuit. Its green-mode operation reduces switching frequency and peak current under light load, achieving high efficiency at partial load.
It integrates VCC self-regulation with hysteresis-based UVLO (VCCON = 4.45V, VCCOFF = 4.6V), timer-based overload protection (150ms delay at 37kHz), and leading-edge blanking (400ns) to suppress current-sense noise. Open-loop detection triggers at FB < 60mV, and thermal shutdown activates at 150°C with auto-restart.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 450V - supports direct connection to rectified AC mains or high-voltage DC bus without pre-regulator. |
| Output Current Capability | 300mA - rated continuous output current in buck configuration with appropriate external components. |
| Integrated MOSFET Breakdown | 500V - enables safe operation up to 450V input with margin for transients and ripple. |
| Peak Current Limit | 500–780mA (typ. 640mA) - sets maximum switch conduction per cycle; compresses under light load to reduce no-load consumption. |
| Feedback Reference Voltage | 2.45–2.65V (typ. 2.55V) - determines regulated output via resistor divider; used for OLP trigger at 1.7V. |
| Minimum Off Time | 10.6–15.6µs (typ. 13.1µs) - limits maximum switching frequency and defines minimum power delivery capability. |
| VCC UVLO Hysteresis | 230mV - ensures stable start-up and shutdown sequencing; prevents oscillation near threshold. |
| Thermal Shutdown Threshold | 150°C - protects die from permanent damage; initiates auto-restart after VCC discharge to 2.35V. |
Pinout & Package
MP9488GS-P is housed in a standard SOIC-8 package with exposed pad not electrically connected (NC pins thermally tied to case). Pin 1 is marked by notch or dot; pins 5, 6, and 8 are internally unconnected and must remain floating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Internal control supply rail | Power source for all logic and gate drivers; self-supplied from VIN via internal HV current source; clamped at 4.8V. |
| 2 FB | Feedback input | Senses output voltage via resistor divider; triggers regulation, OLP (at 1.7V), and open-loop shutdown (at 60mV). |
| 3, 4 SW | Switch node / power MOSFET source | Reference ground for VCC and FB; connects to inductor/diode node; carries high di/dt switching current. |
| 5, 6, 8 NC | No connect | Internally unconnected; must be left floating - no routing or soldering required. |
| 7 VIN | High-voltage input / MOSFET drain | Main power input terminal; withstands up to 500V; supplies internal HV startup circuit and power MOSFET. |
Key Features
| Feature | Design Value |
|---|---|
| Wide input range support | 7.5V–450V operation eliminates need for auxiliary bias supplies or pre-regulators in high-voltage applications. |
| Integrated 500V MOSFET | Reduces BOM count and PCB footprint; avoids external HV MOSFET selection, gate drive, and layout complexity. |
| Frequency foldback + peak-current compression | Automatically lowers switching frequency and peak current at light/no load, improving average efficiency and reducing no-load power draw. |
| Timer-based overload protection | 150ms delay at 37kHz prevents false triggering during startup or transient overloads while ensuring robust fault response. |
| Open-loop detection | Shuts down if FB falls below 60mV - detects missing feedback resistor or broken trace, preventing unregulated high output. |
| Leading-edge blanking | 400ns blanking on current sense path rejects switching-node noise, enabling reliable current limiting without false trips. |
Applications
| Scooter & E-Bike Control Power Supply | Solar Energy System DC-DC Conversion |
|---|---|
Use Scenario: On-board auxiliary power supply converting battery or PV array voltage (e.g., 48–400V) to 15V for controller MCU, display, and sensors. IC Role / Device Role / Timing Role: Primary wide-input buck regulator providing isolated or non-isolated 15V/300mA output with built-in fault protection. Use Value: Eliminates need for external HV MOSFET and startup circuit; maintains regulation across wide battery SOC and PV voltage swings. |
Use Scenario: DC-DC stage in solar charge controller or micro-inverter auxiliary supply, stepping down unregulated PV string voltage (up to 450V) to 12–24V for gate drivers and monitoring ICs. IC Role / Device Role / Timing Role: High-input-voltage offline regulator operating in buck or flyback mode to deliver stable low-voltage bias rails. Use Value: Supports direct connection to high-Voc PV arrays; frequency foldback preserves efficiency during partial shading or low-light conditions. |
| Industrial High-Voltage DC Power Supply | Automotive System Power (12V/24V Bus Derivative) |
Use Scenario: Auxiliary power for PLC I/O modules or motor drives receiving 24–300V DC input from factory bus or rectified AC. IC Role / Device Role / Timing Role: Primary step-down regulator delivering 5V/3.3V for microcontrollers and communication interfaces in harsh environments. Use Value: Integrated 500V MOSFET and thermal/auto-restart protection ensure reliability in industrial settings with voltage surges and ambient temperature extremes. |
Use Scenario: Power supply for vehicle infotainment or ADAS subsystems deriving 5V/3.3V from 12V/24V battery with supercapacitor backup or boosted input (e.g., 48V mild-hybrid bus). IC Role / Device Role / Timing Role: Wide-input buck converter supporting both legacy 12V and next-gen 48V architectures with single BOM. Use Value: 7.5V–450V input range covers cold-crank dips, load-dump transients, and boosted bus voltages without external pre-regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wide-input offline regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP9486GS-P | Lower max input (400V vs. 450V); same SOIC-8 package and pinout; 250mA output rating. | Suitable for lower-voltage solar or industrial inputs where 450V margin is unnecessary. | Select when input stays ≤400V and 250mA output suffices - lower cost and identical layout. |
| UCC28C40DR | Controller-only (no integrated MOSFET); requires external 500V+ FET; higher design complexity but greater flexibility in topology and power level. | Better suited for >300mA or custom flyback/buck-boost designs requiring discrete power stage optimization. | Choose when higher output current, isolation, or multi-output capability is needed - adds external FET and driver complexity. |
Compared with MP9486GS-P, MP9488GS-P offers 50V higher input rating and 50mA more output current; versus UCC28C40DR, it trades external component flexibility for reduced BOM count, smaller footprint, and faster time-to-market in fixed-output, medium-power applications.
Availability
MP9488GS-P is available at Aetrix Electronics and suitable for scooter control power supplies, solar energy system DC-DC conversion, and industrial high-voltage DC power supplies requiring stable component supply across extended lifecycle and environmental stress conditions.
Supply support for MP9488GS-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 power ICs, with emphasis on efficiency, integration, and reliability in power management solutions.
The MP9488 belongs to MPS's wide-input offline regulator product line, designed specifically for cost-sensitive, high-voltage DC-DC conversion in consumer mobility, renewable energy, and industrial equipment where minimal external components and robust protection are critical.
FAQ
What topologies does MP9488GS-P support beyond buck?
MP9488GS-P supports buck-boost, boost, and flyback topologies per its functional block diagram and application schematics. Its integrated 500V MOSFET and variable-off-time control enable these configurations without external HV switches. Flyback operation requires transformer isolation and indirect feedback, while boost/buck-boost use the same pinout with reconfigured external components.
Can MP9488GS-P operate without an external dummy load?
No - a 3–5mA dummy load is required for stable no-load regulation. The IC relies on inductor energy to charge the sampling capacitor (C3) during freewheeling; without sufficient load current, feedback voltage collapses and output becomes unregulated. A Zener diode may substitute if regulation at zero load is not required.
How does the VCC self-supply circuit behave during startup?
At power-on, the internal HV current source draws from VIN to charge the external VCC capacitor. When VCC reaches ~4.6V, the HV source turns off. If VCC drops below ~4.45V during operation, the HV source re-engages. Below ~3.35V, the IC halts switching; below ~2.35V, protection restarts after VCC recharge.
What is the purpose of the 400ns leading-edge blanking (LEB)?
The 400ns LEB disables the current comparator immediately after MOSFET turn-on to ignore parasitic ringing and voltage spikes at the SW node. This prevents premature current-limit tripping due to layout-induced noise, ensuring accurate peak-current sensing and stable regulation under high di/dt conditions.
Is MP9488GS-P RoHS-compliant and halogen-free?
Yes - MP9488GS-P is lead-free, halogen-free, and fully compliant with the EU RoHS directive. MPS confirms green status for this part on its official Quality Assurance webpage, and the SOIC-8 package uses matte tin lead finish meeting JEDEC J-STD-020 moisture sensitivity level 3.
How does frequency foldback improve light-load efficiency?
As load decreases, MP9488GS-P automatically reduces switching frequency and peak current. This lowers switching losses (proportional to fSW) and conduction losses (reduced IPEAK), resulting in higher efficiency at partial load - critical for battery-powered scooters and solar systems operating frequently at low duty cycles.
What is the maximum recommended inductor value for CCM operation?
No absolute maximum is specified, but inductance must be chosen so that minimum off time (13.1µs typ.) supports required output power. Per Equation (8), larger L increases maximum deliverable power in CCM. However, excessively large L may push switching frequency below 20kHz, risking audible noise - typical designs use 1–2mH for 300mA output.
MP9488GS-P 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):
- 7.5V
- Voltage - Input (Max):
- 450V
- Voltage - Output (Min/Fixed):
- 2.55V
- Voltage - Output (Max):
- 450V
- Current - Output:
- 300mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP9488GS-P FAQ
1.How can I place an order for MP9488GS-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP9488GS-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 MP9488GS-P reliable?
The price and inventory of MP9488GS-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP9488GS-P is usually 5 days.
3.What payment methods are accepted for MP9488GS-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP9488GS-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP9488GS-P?
MP9488GS-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP9488GS-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 MP9488GS-P?
For technical support, including MP9488GS-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP9488GS-P requirements.
6.How does Aetrix verify that MP9488GS-P is sourced from the original manufacturer or authorized distributors?
All MP9488GS-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 MP9488GS-P meets industry standards.
7.What is the process for return or replacement of MP9488GS-P?
All MP9488GS-P units undergo pre-shipment inspection (PSI). If there is an issue with MP9488GS-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 MP9488GS-P part is unused and in its original packaging.
Return procedure for MP9488GS-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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