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Monolithic Power Systems Inc. MP9488GS-Z
- Part No.:
- MP9488GS-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP9488GS-Z.pdf
- Description:
- IC REG BUCK BST ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
MP9488GS-Z from Monolithic Power Systems is a 7.5V–450V input, 300mA step-down regulator with integrated 500V MOSFET, peak-current/variable-off-time control, and full protection suite (thermal shutdown, OLP, SCP, open-loop detection). It supports buck, buck-boost, boost, and flyback topologies and is deployed in e-bike control power supplies where high-input-voltage DC-DC conversion is required.
For engineers reviewing the MP9488GS-Z datasheet, MP9488GS-Z pinout, MP9488GS-Z application, or MP9488GS-Z equivalent, key selection criteria include its 500V MOSFET breakdown rating, 4.45V–4.6V VCC operating window, 13.1µs minimum off-time, 150°C thermal shutdown threshold, and SOIC-8 package compatibility with high-voltage layout constraints.
Technical Context
The MP9488GS-Z employs peak-current mode control with variable off-time to regulate output voltage across wide input ranges. Its internal 500V MOSFET enables direct connection to rectified AC or high-voltage DC rails without external HV switches.
It integrates a high-voltage startup current source (2.5–5.5mA at VIN=100V), VCC UVLO with 230mV hysteresis (4.45V turn-on / 4.6V turn-off), and frequency foldback that reduces switching frequency and peak current under light load to maintain >80% efficiency down to 10% load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7.5V to 450V - supports direct connection to rectified 380VAC or 400VDC bus without pre-regulator |
| Switching MOSFET Rating | 500V VBRDSS, 10Ω RDS(on) - eliminates need for external HV switch in industrial/scooter power supplies |
| Peak Current Limit | 500–780mA typ - sets maximum inductor energy transfer per cycle; compresses to ~500mA at light load |
| VCC Operating Range | 4.45V to 4.6V - narrow regulation window ensures stable bias supply during wide-VIN transients |
| Minimum Off Time | 13.1µs - constrains maximum achievable output power in CCM; critical for inductor sizing |
| Thermal Shutdown | 150°C - auto-restart behavior prevents latch-up while protecting die during sustained overload |
| Feedback Reference | 2.45–2.65V - precise 2.55V nominal threshold enables ±1% output regulation with standard resistor dividers |
Pinout & Package
MP9488GS-Z is housed in a standard SOIC-8 package with exposed thermal pad (JEDEC MS-012AA), optimized for high-voltage creepage and thermal dissipation in compact e-bike and solar power designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Internal control circuit power supply | Bias rail for all logic and gate drivers; must be decoupled with ≥1µF ceramic near pin |
| 2 FB | Output voltage feedback input | Monitors regulated output via resistor divider; 2.55V reference triggers MOSFET on-cycle |
| 3, 4 SW | Source terminal of internal MOSFET | Ground reference for VCC and FB; connects to inductor/freewheeling diode node |
| 5, 6, 8 NC | No-connect terminals | Internally unconnected; must remain floating - no PCB trace or solder mask removal required |
| 7 VIN | Drain terminal of internal MOSFET | High-voltage input node; rated to 500V; connects directly to bulk capacitor or rectifier output |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 500V MOSFET | Eliminates external HV switch, reducing BOM count and layout complexity in 400V-class converters |
| Variable off-time + peak-current control | Enables stable regulation across 60:1 input range without external compensation components |
| Frequency foldback & peak-current compression | Maintains >78% efficiency at 10mA load by scaling fSW and IPEAK downward in light-load DCM |
| Timer-based overload protection | 150ms delay (at 37kHz) prevents false triggering during startup or transient overloads |
| Open-loop detection (60mV FB threshold) | Shuts down if feedback path opens (e.g., R1 unsoldered), preventing unregulated high-voltage output |
Applications
| Scooter/E-Bike Control Power Supply | Solar Energy System Auxiliary Supply |
|---|---|
|
Use Scenario: Powers microcontroller, display, and sensor modules in battery-electric two-wheelers using rectified 36–72V battery or regenerated regen-braking voltage. IC Role / Device Role / Timing Role: Primary non-isolated buck controller regulating 15V/300mA from variable battery input (48–400V). Use Value: Enables single-chip solution for high-input-voltage DC-DC conversion without external HV FET or complex gate drive, reducing board area by 35% vs. discrete alternatives. |
Use Scenario: Generates stable 15V bias for charge controllers and monitoring ICs in off-grid solar inverters with PV string voltages up to 450V. IC Role / Device Role / Timing Role: High-voltage auxiliary supply controller supporting flyback topology for isolation-critical subsystems. Use Value: Integrates 500V MOSFET and UVLO hysteresis to withstand PV open-circuit voltage surges and cold-start conditions without external clamping. |
| Automotive System Power | Industrial Power Supply |
|
Use Scenario: Supplies 12V/250mA to telematics and CAN interface modules in 24V/48V commercial vehicle systems with load-dump immunity requirements. IC Role / Device Role / Timing Role: Input-stage buck regulator handling 7.5–450V transients including ISO 7637-2 pulse 5a (120V/100ms). Use Value: Withstands 500V drain-source rating and internal OLP/SCP, eliminating need for TVS front-end protection in cost-sensitive fleet electronics. |
Use Scenario: Provides 15V/300mA for PLC I/O modules and motor driver logic in factory automation equipment powered from 380VAC rectified bus. IC Role / Device Role / Timing Role: Wide-input primary-side controller enabling universal 3-phase input compatibility without input selector switches. Use Value: Reduces design iterations by supporting both 230VAC and 400VAC-derived inputs in same PCB layout, accelerating time-to-market for global deployments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wide-input buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP9486GS-Z | Lower 400V MOSFET rating; identical control architecture and SOIC-8 footprint | Not suitable for >400V input systems (e.g., 450V solar strings); requires derating in 400–450V range | Select when input never exceeds 400V - offers lower cost and same layout compatibility |
| UCC28740DR | Primary-side QR flyback controller; no integrated MOSFET; requires external 600V FET | Supports isolated outputs only; needs transformer, optocoupler, and more external components | Choose only when galvanic isolation is mandatory - adds complexity but enables Class II safety compliance |
Compared with MP9486GS-Z, MP9488GS-Z delivers guaranteed 450V operation and higher surge margin; versus UCC28740DR, it provides non-isolated simplicity and lower component count at the expense of isolation - making it optimal for cost-constrained, space-limited e-bike and solar auxiliary supplies.
Availability
MP9488GS-Z is available at Aetrix Electronics and suitable for scooter/e-bike control power supplies, solar energy system auxiliary supplies, and industrial power supplies requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP9488GS-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 over 20 years of expertise in DC-DC conversion and power management.
The MP9488 belongs to MPS's wide-input buck controller product line, designed specifically for high-voltage industrial, transportation, and renewable energy applications where reliability under extreme input conditions is critical.
FAQ
What is the maximum continuous input voltage the MP9488GS-Z can handle?
The MP9488GS-Z supports a continuous input voltage range of 7.5V to 450V, with an absolute maximum drain-source voltage rating of 500V. This allows safe operation under 450V DC input with margin for transient spikes up to 500V, as confirmed in the Absolute Maximum Ratings table.
Does the MP9488GS-Z require an external MOSFET?
No. The MP9488GS-Z integrates a fully rated 500V, 10Ω RDS(on) power MOSFET. No external high-voltage switch is needed - only passive components (inductor, diodes, capacitors, resistors) are required to implement buck, buck-boost, boost, or flyback topologies.
How does the MP9488GS-Z achieve high efficiency at light load?
It uses frequency foldback and peak-current compression: as load decreases, switching frequency drops from ~45kHz to <10kHz and peak current reduces from 640mA toward 500mA. This cuts switching and conduction losses simultaneously, maintaining >78% efficiency even at 10mA output current.
What protection features are built into the MP9488GS-Z?
It includes thermal shutdown (150°C, auto-restart), VCC under-voltage lockout (4.45V/4.6V hysteresis), timer-based overload protection (150ms delay), short-circuit protection (900–1200mA trigger), and open-loop detection (60mV FB threshold), all implemented internally without external components.
Can the MP9488GS-Z be used in isolated flyback topology?
Yes. The datasheet explicitly lists flyback as a supported topology. In flyback configuration, VIN connects to primary winding, SW serves as the primary return, and feedback is taken indirectly via optocoupler or auxiliary winding - enabling isolated 15V outputs from 450V inputs.
What is the purpose of the NC pins (5, 6, 8) on the SOIC-8 package?
Pins 5, 6, and 8 are no-connect terminals - they are not bonded internally and must remain electrically floating. They should not be tied to ground, VCC, or any other net; PCB pads may be omitted or left unmasked, but must not create unintended coupling paths.
Is a dummy load required for stable regulation?
Yes. Due to its sample-and-hold feedback architecture, a 3–5mA dummy load is recommended to ensure sufficient inductor current to charge the sampling capacitor (C3) and maintain regulation at no-load. Without it, output voltage may rise 5–10% above setpoint.
MP9488GS-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, Boost, Buck-Boost, Flyback
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 450V
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Current - Output:
- 300mA (Switch)
- Frequency - Switching:
- 45kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MP9488GS-Z FAQ
1.How can I place an order for MP9488GS-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP9488GS-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 MP9488GS-Z reliable?
The price and inventory of MP9488GS-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP9488GS-Z is usually 5 days.
3.What payment methods are accepted for MP9488GS-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP9488GS-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP9488GS-Z?
MP9488GS-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP9488GS-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 MP9488GS-Z?
For technical support, including MP9488GS-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP9488GS-Z requirements.
6.How does Aetrix verify that MP9488GS-Z is sourced from the original manufacturer or authorized distributors?
All MP9488GS-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 MP9488GS-Z meets industry standards.
7.What is the process for return or replacement of MP9488GS-Z?
All MP9488GS-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP9488GS-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 MP9488GS-Z part is unused and in its original packaging.
Return procedure for MP9488GS-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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