My Inquiry
My Account
Monolithic Power Systems Inc. MP9488GS
- Part No.:
- MP9488GS
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP9488GS.pdf
- Description:
- IC REG BUCK BST ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,635
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MP9488GS from Monolithic Power Systems is a 7.5V to 450V 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). It supports buck, buck-boost, boost, and flyback topologies and is designed for high-input-voltage civil applications including e-bike and scooter power supplies.
For engineers reviewing the MP9488GS datasheet, MP9488GS pinout, MP9488GS application, or MP9488GS equivalent, key selection criteria include its 450V max input rating, 500V MOSFET integration, SOIC-8 thermal performance (θJA = 96°C/W), light-load frequency foldback, and VCC self-supply architecture requiring external 4.45–4.6V regulation.
Technical Context
The MP9488GS implements green-mode operation using peak-current sensing and variable-off-time control to regulate output voltage across wide input ranges. Its internal 500V MOSFET enables direct high-voltage DC-DC conversion without external HV switches.
It features dual-stage VCC management: a high-voltage startup current source (2.5–5.5mA at VIN=100V) charges the VCC capacitor until VCCOFF (4.6V), then disables; when VCC drops below VCCON (4.45V), it re-engages. Fault recovery uses timer-based discharge to VCCpro (2.35V) before 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 battery stacks without pre-regulation. |
| Switching MOSFET Rating | 500V breakdown voltage - eliminates need for external HV switch in buck/flyback designs up to 450V input. |
| Peak Current Limit | 500–780mA typ - sets maximum inductor current and defines power capability in CCM; compresses under light load to reduce switching loss. |
| VCC Operating Range | 4.45V to 4.6V - narrow window ensures stable internal bias; UVLO hysteresis (230mV) prevents chatter during brownout. |
| Thermal Shutdown Threshold | 150°C - auto-restart protection prevents permanent die damage during sustained overload or poor heatsinking. |
| Minimum Off Time | 13.1µs - limits maximum switching frequency (~76kHz at VIN=60V/VOUT=15V) and defines minimum power delivery capability. |
| Feedback Reference Voltage | 2.45–2.65V - precision bandgap reference used with external resistor divider to set regulated output voltage (e.g., 15V @ R1=23.7kΩ, R2=4.99kΩ). |
| OLP Delay Time | 150ms at 37kHz - timer-based fault detection avoids false triggering during startup or transient load steps. |
Pinout & Package
The MP9488GS is housed in a standard SOIC-8 package with exposed pad not electrically connected; thermal resistance θJA = 96°C/W on 4-layer PCB per JESD51-7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Internal bias supply rail | Power source for all control circuits; must be externally decoupled and maintained between 4.45V–4.6V; clamped at 4.8V internally. |
| 2 FB | Output voltage feedback input | Monitors sampled output via external diode/resistor network; triggers switching when voltage falls below 2.55V reference. |
| 3,4 SW | Source terminal of internal MOSFET | Ground reference for VCC and FB; connects to inductor node in buck topology; carries high di/dt switching current. |
| 5,6,8 NC | No-connect terminals | Internally unconnected; must remain floating - no routing or soldering permitted. |
| 7 VIN | Drain terminal of internal MOSFET | High-voltage input node; accepts up to 450V DC; also feeds internal HV startup current source (ILeak ≤25μA at 400V). |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 500V MOSFET | Enables single-chip 450V-input buck conversion without external HV switch, reducing BOM count and layout complexity. |
| Frequency foldback & peak-current compression | Reduces switching frequency and peak current under light/no-load conditions, achieving >75% efficiency at 10mA output while minimizing standby power. |
| Timer-based overload protection (OLP) | 150ms delay at 37kHz prevents false trips during startup transients while ensuring reliable shutdown under sustained overloads. |
| Internal high-voltage startup circuit | Self-supplies VCC from VIN down to 7.5V, eliminating need for auxiliary winding or external bias supply in flyback/buck-boost designs. |
| Open-loop detection | Shuts down if FB voltage drops below 60mV (e.g., due to open R1), preventing unregulated high-voltage output and enabling safe field failure mode. |
Applications
| Scooter & E-Bike Control Power | Solar Energy Systems |
|---|---|
Use Scenario: On-board 15V/300mA auxiliary supply powering motor controller logic, display, and sensors in 48–72V battery-powered e-bikes. IC Role / Device Role / Timing Role: Primary DC-DC regulator converting battery voltage to stable 15V rail; operates in buck topology with fixed-frequency CCM at full load and variable-off-time DCM at idle. Use Value: Eliminates need for isolated auxiliary supply; withstands battery voltage surges up to 450V during regenerative braking or cold-cranking events. | Use Scenario: MPPT charge controller auxiliary supply in off-grid solar inverters accepting 100–400V PV string inputs. IC Role / Device Role / Timing Role: Non-isolated buck converter generating 12V/300mA for microcontroller, gate drivers, and sensing circuitry; leverages wide VIN range to avoid intermediate bus conversion. Use Value: Reduces system cost and footprint by replacing two-stage (HV → 24V → 12V) conversion with single-stage HV → 12V, improving overall efficiency by ~3%. |
| Automotive System Power | Industrial Power Supplies |
Use Scenario: 24V truck/bus subsystem power supply handling 12–45V nominal input with 100V load-dump transients. IC Role / Device Role / Timing Role: High-input buck regulator delivering 5V/300mA to telematics unit; uses internal 500V MOSFET to survive ISO 7637-2 pulse 5a (100V/400ms). Use Value: Replaces discrete HV FET + controller solution, cutting bill-of-materials by 4 components and simplifying transient immunity design. | Use Scenario: DIN-rail mounted industrial PLC power module converting 120–400V DC input (from rectified AC or HV DC bus) to 24V/300mA control rail. IC Role / Device Role / Timing Role: Primary step-down regulator operating in flyback configuration for isolation; uses VCC self-supply to eliminate auxiliary winding. Use Value: Enables compact, low-cost isolated supply meeting IEC 61000-4-5 surge immunity (4kV) without transformer auxiliary winding or optocoupler feedback. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wide-input buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP9486GS | Lower 400V input rating; same SOIC-8 package and pinout; 400mA peak current limit. | Limited to ≤400V systems; reduced power margin in high-VIN flyback designs. | Select when input never exceeds 400V and higher peak current is unnecessary - offers lower cost and identical layout. |
| UCC28C40DR | Controller-only (no integrated MOSFET); requires external 600V FET; 1A current sense threshold; 1MHz max frequency. | Needs additional HV FET, gate driver, and snubber; supports higher power but increases design complexity and board area. | Choose for >300mA output or when custom MOSFET selection (e.g., SiC) is required for efficiency optimization above 100kHz. |
Compared with MP9486GS, the MP9488GS adds 50V headroom for robustness against line surges and extends usable lifetime in 450V-rated solar or industrial systems; versus UCC28C40DR, it trades external flexibility for BOM reduction and simplified layout - critical for cost-sensitive, space-constrained e-mobility applications.
Availability
MP9488GS is available at Aetrix Electronics and suitable for scooter control power supplies, solar energy system auxiliary rails, and industrial HV DC-DC converters requiring stable component supply across extended temperature (-40°C to +125°C) and high-reliability production cycles.
Supply support for MP9488GS 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 conversion, LED drivers, and motor control solutions.
The MP9488 belongs to MPS's wide-input buck regulator product line, engineered specifically for cost-sensitive, high-voltage civil and industrial applications where integration, surge resilience, and light-load efficiency are prioritized over programmability or digital interface.
FAQ
What is the maximum continuous input voltage the MP9488GS can handle?
The MP9488GS supports a continuous input voltage range of 7.5V to 450V. Its internal 500V MOSFET provides 50V of margin above the rated maximum, enabling reliable operation during transient overvoltage events such as load dump or lightning-induced surges in solar and automotive applications.
Does the MP9488GS require an external bootstrap capacitor or gate driver?
No. The MP9488GS integrates both the 500V power MOSFET and all necessary gate drive circuitry. Unlike controller-only ICs, it does not require external high-side gate drivers, bootstrap networks, or floating power supplies - simplifying design and reducing component count in buck and flyback topologies.
How does the MP9488GS achieve high efficiency at light load?
It employs frequency foldback and peak-current compression: as load decreases, both switching frequency and peak current limit scale downward. At no-load, frequency drops below 10kHz and peak current reduces to ~500mA, minimizing switching and conduction losses while maintaining regulation via sampling capacitor hold time.
Can the MP9488GS operate in flyback topology with primary-side regulation?
Yes. The MP9488GS supports flyback operation using indirect feedback - the FB pin senses output voltage through a sampling diode and capacitor network referenced to SW. This eliminates the need for optocouplers or TL431, enabling compact, low-cost isolated supplies compliant with basic insulation requirements.
What is the purpose of the NC pins (5, 6, 8) on the SOIC-8 package?
Pins 5, 6, and 8 are internally unconnected and must remain floating - no traces, vias, or solder should contact them. They serve mechanical and thermal roles only: Pin 5 and 6 help balance package stress during reflow; Pin 8 improves thermal dissipation when tied to a copper pour (but not electrically connected to any net).
Is a dummy load required for stable regulation with the MP9488GS?
Yes. Due to its sampling-and-hold feedback architecture, a 3–5mA dummy load is recommended to ensure sufficient inductor current to charge the feedback capacitor (C3) during each off-cycle. Without it, regulation degrades at no-load, especially with mismatched freewheeling and sampling diodes.
What happens during VCC under-voltage lockout (UVLO) recovery?
When VCC drops below 4.45V, the internal HV current source re-engages and begins charging the VCC capacitor. Recovery is not instantaneous: the IC remains disabled until VCC rises above 4.6V (VCCOFF), at which point normal switching resumes. During fault conditions, VCC discharges to 2.35V before restart initiation.
MP9488GS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MP9488GS through Aetrix?
Please submit a Request for Quotation (RFQ) for MP9488GS 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 reliable?
The price and inventory of MP9488GS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP9488GS is usually 5 days.
3.What payment methods are accepted for MP9488GS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP9488GS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP9488GS?
MP9488GS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP9488GS 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?
For technical support, including MP9488GS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP9488GS requirements.
6.How does Aetrix verify that MP9488GS is sourced from the original manufacturer or authorized distributors?
All MP9488GS 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 meets industry standards.
7.What is the process for return or replacement of MP9488GS?
All MP9488GS units undergo pre-shipment inspection (PSI). If there is an issue with MP9488GS, 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 part is unused and in its original packaging.
Return procedure for MP9488GS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MP9488GS Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
