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Monolithic Power Systems Inc. MPQ4590GS-Z
- Part No.:
- MPQ4590GS-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MPQ4590GS-Z.pdf
- Description:
- 640V NON-ISOLATED REGULATOR, UP
- Quantity:
- Payment:
- Shipping:
Inventory:3,049
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Product details
Overview
MPQ4590GS-Z from Monolithic Power Systems is a 640V primary-side constant-voltage regulator IC with integrated MOSFET, supporting buck, buck-boost, boost, and flyback topologies. It delivers up to 400mA output current in CCM, achieves <30mW no-load power consumption, and is AEC-Q100 qualified for automotive-grade reliability. It targets non-isolated low-power supplies in PTC heaters and standby power systems.
For engineers reviewing the MPQ4590GS-Z datasheet, MPQ4590GS-Z pinout, MPQ4590GS-Z application, or MPQ4590GS-Z equivalent, key selection criteria include its 640V/13.5Ω integrated MOSFET, primary-side CV regulation without optocoupler, green-mode frequency foldback, thermal shutdown (150°C), and SOIC-8 package compatibility with automotive temperature range (–40°C to +125°C).
Technical Context
The MPQ4590GS-Z implements primary-side constant-voltage regulation using feedback sampling via an external capacitor (C3), eliminating optocoupler dependency. Its internal error amplifier compares FB voltage to a 2.55V reference and controls switching via peak-current-limited PWM with 9.5–15μs minimum off-time.
It features adaptive green-mode operation: switching frequency and peak current limit (660mA typ.) scale down under light load to maintain efficiency, with frequency foldback and peak-current compression reducing no-load consumption. Protection includes OTP (150°C trigger, 30°C hysteresis), UVLO (5.3V turn-on / 5.6V turn-off), OLP (1.7V FB threshold, 220ms delay), SCP (900mA typ.), and open-loop detection (0.5V FB threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | Up to 640V drain-source rating; supports universal AC input after rectification (e.g., 120–600VDC). |
| Output Current | Up to 400mA in continuous conduction mode (CCM); ≤250mA in discontinuous mode (DCM). |
| No-Load Power | <30mW - enables compliance with stringent energy-saving standards (e.g., EU CoC Tier 2, DOE Level VI). |
| Integrated MOSFET | 640V breakdown voltage, 13.5Ω RDS(on) at 25°C - eliminates external high-voltage switch and reduces BOM count. |
| Feedback Reference | 2.55V ±0.1V - sets precise output voltage via resistor divider (e.g., 12V output with R1/R2 = 3.7kΩ/10kΩ). |
| Thermal Shutdown | 150°C junction trip point with 30°C hysteresis - ensures safe recovery without external thermal management. |
| Operating Temp | –40°C to +125°C ambient - validated for automotive under-hood and industrial control environments. |
Pinout & Package
MPQ4590GS-Z is housed in a standard SOIC-8 package with exposed pad not electrically connected. Pin functions are validated per MPS datasheet Rev. 1.0 (2018) and JEDEC MS-012AA.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Internal bias supply input | Power source for control circuitry; self-supplied from DRAIN during startup; regulated between 5.3V (UVLO on) and 5.6V (UVLO off). |
| 2 FB | Primary-side voltage feedback input | Monitors sampled output voltage via external capacitor (C3); triggers regulation when below 2.55V reference. |
| 3, 5, 6, 8 NC | No connection | Unused pins; must remain unconnected to avoid noise coupling or latch-up risk. |
| 4 SOURCE | MOSFET source terminal & ground reference | Serves as common reference for VCC and FB; connects to system ground or return path of inductor/freewheeling diode. |
| 7 DRAIN | High-voltage MOSFET drain | Connects to rectified high-voltage input rail; carries full switching current and withstands up to 640V. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side CV regulation | Eliminates optocoupler and secondary-side TL431, reducing component count, cost, and layout complexity in non-isolated designs. |
| Green-mode frequency foldback | Switching frequency decreases with load - maintains >75% efficiency at 10% load and enables <30mW no-load consumption. |
| Integrated 640V MOSFET | On-resistance of 13.5Ω at 25°C - supports up to 5W output power while minimizing external parts and PCB space. |
| Comprehensive protection suite | OTP, UVLO, OLP (220ms delay), SCP (900mA threshold), and open-loop detection - ensures robust operation across automotive transients and fault conditions. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C operation with extended reliability testing - suitable for automotive PTC heaters and EV auxiliary supplies. |
Applications
| Automotive PTC Heater Control | EV Auxiliary Standby Supply |
|---|---|
|
Use Scenario: Regulating 12V auxiliary power from high-voltage battery bus (e.g., 400V DC) for cabin heater control logic and sensors. IC Role / Device Role / Timing Role: Primary-side CV regulator in buck topology; provides isolated-free, low-noise 12V/300mA output with fast transient response to heater enable/disable commands. Use Value: Enables direct HV-to-LV conversion without isolation transformer, reducing size/weight by ~40% versus flyback-based solutions while meeting AEC-Q100 requirements. |
Use Scenario: Powering MCU, CAN transceiver, and status LEDs during vehicle sleep mode where ultra-low quiescent power is mandatory. IC Role / Device Role / Timing Role: Green-mode regulator in flyback configuration; maintains regulation at 3mA dummy load with <30mW total input power. Use Value: Extends battery standby time by minimizing no-load loss - critical for ISO 16750-2 compliant 168h parking mode compliance. |
| Industrial Smart Appliance PSU | Home Appliance Standby Converter |
|
Use Scenario: Generating 5V/200mA for microcontroller and communication interface in smart HVAC controllers operating from rectified 230V AC. IC Role / Device Role / Timing Role: Buck-boost topology regulator; handles wide input variation (150–400V DC) while maintaining tight CV regulation across line and load changes. Use Value: Delivers stable 5V output with ±2% accuracy over –25°C to +85°C ambient - eliminates need for post-regulation LDOs. |
Use Scenario: Providing 3.3V/150mA for Wi-Fi module and real-time clock in IoT-enabled washing machines during off-cycle. IC Role / Device Role / Timing Role: Boost topology regulator; steps up rectified 120V AC-derived 80V DC to 3.3V with minimal external components. Use Value: Achieves Energy Star 7.0 standby power compliance (<0.5W) with single-chip solution and no optocoupler BOM overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side CV regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4570GQ-AEC1-Z | Lower 500V MOSFET rating; 15Ω RDS(on); no frequency foldback - fixed 65kHz operation. | Limited to ≤350V input; higher no-load power (~65mW); less suitable for universal AC input or strict energy standards. | Select only if input voltage stays below 350V DC and green-mode efficiency is not required. |
| UCC28911DR | Texas Instruments flyback controller with 700V MOSFET; requires optocoupler for CV; no integrated error amp - external compensation needed. | Supports isolated outputs only; adds 3–4 passive components and layout complexity; lacks AEC-Q100 qualification. | Choose only when galvanic isolation is mandatory and automotive qualification is not required. |
Compared with MPQ4590GS-Z, MPQ4570GQ-AEC1-Z trades voltage headroom and efficiency for lower cost in fixed-input applications, while UCC28911DR adds isolation capability at the expense of BOM count, design effort, and automotive compliance - making MPQ4590GS-Z optimal for non-isolated, AEC-Q100, and ultra-low-no-load use cases.
Availability
MPQ4590GS-Z is available at Aetrix Electronics and suitable for automotive PTC heater control, EV auxiliary standby supplies, and industrial smart appliance power conversion requiring stable component supply, AEC-Q100 traceability, and long-term lifecycle support.
Supply support for MPQ4590GS-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 power management ICs, with over two decades of expertise in DC/DC converters, LED drivers, and motor drivers.
The MPQ4590 belongs to MPS's AEC-Q100-qualified primary-side regulator product line, designed specifically for cost-sensitive, non-isolated, high-input-voltage power supplies in automotive and industrial applications where optocoupler elimination and ultra-low standby power are critical.
FAQ
What topologies does MPQ4590GS-Z support, and which require isolation?
The MPQ4590GS-Z supports buck, buck-boost, boost, and flyback topologies. Only the flyback configuration provides galvanic isolation; all others (buck, buck-boost, boost) are non-isolated and rely on primary-side regulation. Isolation is determined solely by transformer usage-not by the IC itself-so flyback designs require a custom transformer with reinforced insulation for safety-critical applications.
How is output voltage set, and what is the tolerance of the internal reference?
Output voltage is set using a resistor divider (R1/R2) from output to FB pin, targeting 2.55V at FB. The internal reference is guaranteed 2.45V–2.65V (±0.1V) over temperature. For a 12V output, R2 = 10kΩ and R1 ≈ 3.7kΩ yields VOUT = 2.55 × (1 + R1/R2) = 12.0V, with typical accuracy ±2% including resistor tolerance and FB drift.
Does MPQ4590GS-Z require an external startup circuit, and how does VCC management work?
No external startup circuit is needed. The IC uses an internal high-voltage regulator that charges the VCC capacitor from the DRAIN pin. When VCC reaches 5.6V, switching begins and the HV regulator turns off. If VCC drops below 5.3V, the HV regulator re-engages to recharge VCC. Switching stops if VCC falls below 3.4V, and fault recovery requires VCC discharge to 2.4V before restart.
What is the purpose of the "dummy load," and how is its value determined?
The dummy load (typically 3mA) ensures sufficient inductor energy to charge the feedback sampling capacitor (C3) during light/no-load conditions, maintaining regulation accuracy. Its value balances no-load power consumption and regulation stability: too small causes output droop; too large increases idle loss. For 12V output, a 3.9kΩ/0.25W resistor provides ~3.1mA and meets <30mW spec.
Can MPQ4590GS-Z be used in designs requiring >5W output power?
No - the MPQ4590GS-Z is rated for up to 5W maximum output power due to thermal limits of its integrated 640V MOSFET and SOIC-8 package. Attempting >5W causes excessive junction temperature rise beyond the 150°C shutdown threshold, triggering OTP. For higher power, use discrete MOSFET controllers like MPQ4572 or consider multi-phase architectures.
How does leading-edge blanking (LEB) improve reliability in high-dV/dt environments?
LEB disables the current-sense comparator for 350ns after MOSFET turn-on to ignore parasitic turn-on spikes caused by diode reverse recovery and layout inductance. This prevents false overcurrent trips during normal switching, especially critical in high-input-voltage flyback or boost designs where dV/dt exceeds 50V/ns - ensuring stable operation without sacrificing protection responsiveness.
Is MPQ4590GS-Z RoHS and REACH compliant, and what is its moisture sensitivity level?
Yes - MPQ4590GS-Z is lead-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. It is rated MSL-3 per J-STD-020, requiring floor life of 168 hours at ≤30°C/60% RH and bake condition of 24h at 125°C prior to reflow if exposed beyond limit.
MPQ4590GS-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Non-Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 700V
- Topology:
- Boost, Buck, Buck-Boost, Flyback
- Voltage - Start Up:
- -
- Voltage - Supply (Vcc/Vdd):
- 5.3V ~ 5.6V
- Duty Cycle:
- -
- Frequency - Switching:
- -
- Power (Watts):
- -
- Fault Protection:
- Open Loop, Over Load, Over Temperature, Short Circuit, UVLO
- Control Features:
- Frequency Control, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- 8-SOIC
- Mounting Type:
- Surface Mount
MPQ4590GS-Z FAQ
1.How can I place an order for MPQ4590GS-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4590GS-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 MPQ4590GS-Z reliable?
The price and inventory of MPQ4590GS-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4590GS-Z is usually 5 days.
3.What payment methods are accepted for MPQ4590GS-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4590GS-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4590GS-Z?
MPQ4590GS-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4590GS-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 MPQ4590GS-Z?
For technical support, including MPQ4590GS-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4590GS-Z requirements.
6.How does Aetrix verify that MPQ4590GS-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4590GS-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 MPQ4590GS-Z meets industry standards.
7.What is the process for return or replacement of MPQ4590GS-Z?
All MPQ4590GS-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4590GS-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 MPQ4590GS-Z part is unused and in its original packaging.
Return procedure for MPQ4590GS-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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