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Monolithic Power Systems Inc. MPQ4425AGQB-Z
- Part No.:
- MPQ4425AGQB-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 13-PowerVQFN
- Datasheet:
-
MPQ4425AGQB-Z.pdf
- Description:
- IC LED DRVR RGLTR PWM 1.5A 13QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,046
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Product details
Overview
MPQ4425AGQB-Z from Monolithic Power Systems is a synchronous step-down LED driver IC with integrated 85mΩ/50mΩ MOSFETs, delivering up to 1.5A continuous output current across a 4V–36V input range, operating at a default 2.2MHz switching frequency, and qualified to AEC-Q100 Grade-1 for automotive lighting applications.
For engineers reviewing the MPQ4425AGQB-Z datasheet, MPQ4425AGQB-Z pinout, MPQ4425AGQB-Z application, or MPQ4425AGQB-Z equivalent, key selection criteria include its forced CCM mode, 0.2V reference voltage for precise LED current regulation, fault indication for LED open/short/thermal events, and CISPR25 Class 5 EMI compliance in automotive environments.
Technical Context
The MPQ4425AGQB-Z implements fixed-frequency peak-current-mode control with internal 4.9V bias regulator, valley-current-detection over-current protection, and thermal shutdown at 170°C with 30°C hysteresis. Its bootstrap circuit supports high-side gate drive via external BST capacitor and optional 20Ω series resistor.
It operates in forced continuous conduction mode (CCM) across full load range, includes frequency foldback to 1.1MHz above ~21V input, and integrates soft-start (0.9ms typical) with internal 0.2V reference and error amplifier optimized for minimal external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - supports wide automotive battery rail variations including cold-crank (4.5V) and load-dump (36V) conditions. |
| Output Current | Up to 1.5A - set via external RFB with 0.2V reference; enables driving multi-string white LEDs in headlamp or DRL modules. |
| Switching Frequency | 2.2MHz (default), folds back to 1.1MHz above ~21V - enables compact magnetics and avoids AM radio band while maintaining EMI control. |
| Internal MOSFET RDS(on) | 85mΩ (HS), 50mΩ (LS) - reduces conduction loss and thermal stress in high-current LED driver stage without external FETs. |
| Feedback Reference | 0.2V ±4% (–40°C to +125°C) - enables accurate, temperature-stable LED current regulation using low-value, high-power RFB. |
| Fault Protection | LED open/short detection, OCP with valley-current sensing, thermal shutdown (170°C), and open-drain /FAULT pin - provides system-level diagnostics for ASIL-B–compatible lighting control. |
| EMI Compliance | CISPR25 Class 5 - meets stringent automotive radiated emission requirements without external filters in typical layouts. |
Pinout & Package
MPQ4425AGQB-Z is housed in a space-saving QFN-13 (2.5mm × 3mm) package with wettable flank option available (MPQ4425AGQBE-AEC1); thermal performance optimized for automotive PCBs with θJA = 60°C/W on 4-layer board.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 IN | Power input | Accepts 4V–36V supply; requires low-ESR ceramic input capacitor placed adjacent to minimize high-frequency loop area. |
| 3 NC | No connect | Must remain unconnected; no internal function or bonding. |
| 4 /FAULT | Fault indicator | Open-drain output pulled low during LED open/short or thermal shutdown; requires external pull-up to VCC or logic rail. |
| 5 EN/DIM | Enable & PWM dimming input | Logic-enable pin with 1.45V rising threshold; accepts 100Hz–2kHz PWM signal for analog-equivalent brightness control. |
| 6 FB | Current-sense feedback | Connects to RFB between LED– and PGND; referenced to internal 0.2V; trace must be short and shielded from noise. |
| 7 VCC | Bias supply | Internally regulated 4.9V output; requires 0.1µF–0.22µF ceramic decoupling capacitor directly at pin. |
| 8 AGND | Analog ground | Reference for FB, EN/DIM, and internal error amp; internally tied to PGND - no external connection needed. |
| 9 SW | Power switch node | High-current switching output; connects to inductor and BST capacitor; requires wide copper pour and minimal trace inductance. |
| 10 BST | Bootstrap supply | Drives high-side MOSFET gate; requires 0.1µF–1µF capacitor to SW and optional 20Ω series resistor to suppress ringing. |
| 11, 12, 13 PGND | Power ground | Main return path for high di/dt currents; must be connected via multiple vias to internal ground plane for thermal and EMI integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Continuous Conduction Mode (CCM) | Maintains fixed 2.2MHz operation from no-load to full 1.5A, eliminating audible noise and enabling predictable EMI filtering. |
| Integrated Fault Diagnostics | /FAULT pin reports LED open, short, and thermal events independently - eliminates need for external monitoring circuitry in ASIL-B lighting systems. |
| AEC-Q100 Grade-1 Qualification | Rated for –40°C to +125°C junction temperature - validated for under-hood automotive LED headlamp and fog lamp applications. |
| PWM Dimming Interface | EN/DIM pin accepts 100Hz–2kHz external PWM with ≥1.8V amplitude - enables seamless integration with vehicle body controllers without added logic. |
| CISPR25 Class 5 Compliance | Meets OEM radiated emission limits without external EMI filters in standard layout - reduces BOM cost and board area in space-constrained modules. |
Applications
| Automotive Daytime Running Lights (DRL) | Automotive Front Fog Lamps |
|---|---|
|
Use Scenario: Constant-current LED string driving in 12V/24V vehicle electrical systems with transient voltage exposure. IC Role / Device Role / Timing Role: Primary LED current regulator with integrated power switches, fault reporting, and PWM dimming interface. Use Value: Delivers stable 1.5A output across cold-crank (4.5V) and load-dump (36V) events while meeting OEM EMI requirements without external filters. |
Use Scenario: High-brightness, thermally demanding LED arrays mounted near engine compartment heat sources. IC Role / Device Role / Timing Role: Synchronous buck controller with thermal shutdown and forced CCM for consistent light output and reliability. Use Value: Junction temperature limit of 125°C and thermal hysteresis enable sustained operation in ambient >85°C environments without derating. |
| Automotive Rear Combination Lamps | Commercial Vehicle Stop/Tail Lights |
|
Use Scenario: Multi-function LED module requiring independent dimming for brake, tail, and turn signals. IC Role / Device Role / Timing Role: Enable/dimming input used for dynamic brightness control; /FAULT pin supports CAN bus fault logging. Use Value: Single-pin PWM dimming (100Hz–2kHz) enables precise luminance grading per function without additional DAC or MCU GPIO resources. |
Use Scenario: Heavy-duty truck lighting with wide input range (9V–32V) and high vibration/temperature cycling. IC Role / Device Role / Timing Role: Robust LED driver with AEC-Q100 qualification, wettable flank package for solder joint inspection, and UVLO hysteresis. Use Value: Input UVLO thresholds (3.5V rise / 3.1V fall) prevent erratic startup during battery recovery after cranking. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4425AGQBE-AEC1 | Same die, wettable flank QFN-13 package - improves solder joint inspection yield in automated optical inspection (AOI) processes. | Preferred for high-volume automotive production where IPC-A-610 Class 3 solder joint verification is required. | Select when AOI or X-ray inspection of bottom-side solder joints is mandated by OEM quality plan. |
| MPQ4425AGQB-AEC1 | Identical electrical specs and QFN-13 footprint; differs only in top marking and tape/reel packaging - no functional difference. | Used in legacy designs where part number traceability or specific reel labeling is required by procurement policy. | Choose only if internal part numbering or logistics documentation mandates the -AEC1 suffix; electrically interchangeable. |
Compared with MPQ4425AGQB-Z, the wettable flank variant (MPQ4425AGQBE-AEC1) adds manufacturability assurance for high-reliability solder joints, while the -AEC1 version offers identical performance with alternate marking - both retain full AEC-Q100 Grade-1 qualification and 2.2MHz operation.
Availability
MPQ4425AGQB-Z is available at Aetrix Electronics and suitable for automotive daytime running lights, front fog lamps, and rear combination lamps requiring stable component supply with AEC-Q100 qualification, high-efficiency synchronous conversion, and robust fault reporting.
Supply support for MPQ4425AGQB-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.
The MPQ4425A product line delivers AEC-Q100–qualified LED drivers for automotive exterior lighting, emphasizing integration (dual MOSFETs, bootstrap, fault logic), EMI robustness (CISPR25 Class 5), and thermal resilience in compact QFN packages.
FAQ
What is the minimum recommended input capacitance for MPQ4425AGQB-Z?
The datasheet specifies a minimum 4.7µF ceramic input capacitor (X5R/X7R dielectric) with an additional 0.1µF high-frequency bypass capacitor placed adjacent to the IN and PGND pins. This dual-capacitor approach ensures stable operation under high di/dt transients and suppresses switching noise above 10MHz.
Can MPQ4425AGQB-Z drive more than 1.5A of LED current?
No - the device is rated for a maximum continuous output current of 1.5A, enforced by internal current-limit thresholds (2.5A–5.5A peak, 1.2A reverse) and thermal shutdown at 170°C. Exceeding 1.5A risks triggering OCP or thermal shutdown, and violates AEC-Q100 qualification limits.
Does MPQ4425AGQB-Z require an external bootstrap diode?
No - the IC includes an internal bootstrap charging circuit. An external diode (e.g., 1N4148) is optional and only recommended for duty cycles above 65% to improve efficiency; it is not required for standard operation with the internal bootstrap regulator and 0.1µF BST capacitor.
How is LED open-circuit fault detected?
The /FAULT pin is pulled low when the FB voltage exceeds 140% of the 0.2V reference (i.e., >280mV), indicating loss of current through the LED string. This detection occurs within 10µs and is latched until EN/DIM is cycled or input voltage is removed.
What is the purpose of the NC pin (Pin 3)?
Pin 3 is a no-connect terminal with no internal bond wire or circuit connection. It must remain unconnected on the PCB - routing traces or placing vias to this pad may cause mechanical stress or unintended coupling and is strictly prohibited per MPS layout guidelines.
Is soft-start time adjustable externally?
No - soft-start is fully internal and fixed at 0.9ms (typical) for 10%–90% LED current ramp-up. The timing is controlled by an internal current source charging an internal capacitor; no external components influence this parameter.
What is the maximum allowable BST capacitor value?
The datasheet specifies a recommended range of 0.1µF to 1µF for the BST capacitor. Values above 1µF are not characterized and may delay bootstrap recharge, impair high-duty-cycle operation, or increase start-up time - 0.22µF ceramic is optimal for most designs.
MPQ4425AGQB-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 13-PowerVQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1.5A
- Frequency:
- 2.2MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-QFN (2.5x3)
MPQ4425AGQB-Z FAQ
1.How can I place an order for MPQ4425AGQB-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4425AGQB-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 MPQ4425AGQB-Z reliable?
The price and inventory of MPQ4425AGQB-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4425AGQB-Z is usually 5 days.
3.What payment methods are accepted for MPQ4425AGQB-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4425AGQB-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4425AGQB-Z?
MPQ4425AGQB-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4425AGQB-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 MPQ4425AGQB-Z?
For technical support, including MPQ4425AGQB-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4425AGQB-Z requirements.
6.How does Aetrix verify that MPQ4425AGQB-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4425AGQB-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 MPQ4425AGQB-Z meets industry standards.
7.What is the process for return or replacement of MPQ4425AGQB-Z?
All MPQ4425AGQB-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4425AGQB-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 MPQ4425AGQB-Z part is unused and in its original packaging.
Return procedure for MPQ4425AGQB-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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