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Monolithic Power Systems Inc. MPQ4415AGQB-Z
- Part No.:
- MPQ4415AGQB-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 13-PowerVQFN
- Datasheet:
-
MPQ4415AGQB-Z.pdf
- Description:
- IC REG BUCK ADJ 1.5A 13QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,275
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Product details
Overview
MPQ4415AGQB-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 1.5A continuous output current across a 4V–36V input range. It integrates 90mΩ high-side and 50mΩ low-side MOSFETs, operates at a default 2.2MHz switching frequency with 450kHz–2.2MHz synchronization capability, and features power-good indication, internal soft-start, and valley-current-based over-current protection. It is deployed in automotive infotainment power rails requiring compact, high-efficiency, EMI-compliant regulation.
For engineers reviewing the MPQ4415AGQB-Z datasheet, MPQ4415AGQB-Z pinout, MPQ4415AGQB-Z application, or MPQ4415AGQB-Z equivalent, key selection criteria include its AEC-Q100 qualification, wettable-flank QFN-13 package for automated optical inspection, CISPR25 Class 5 compliance, forced CCM operation across load range, and integrated bootstrap circuitry enabling stable high-duty-cycle operation.
Technical Context
The MPQ4415AGQB-Z employs peak-current-mode control with internal compensation, enabling fast transient response and simplified loop stability. Its fixed-frequency architecture supports external synchronization from 450kHz to 2.2MHz, and it enters frequency foldback (to ~1.1MHz) above ~21V input or during short-circuit conditions to maintain control.
It integrates a 4.9V internal bias regulator powered from VIN, a floating bootstrap driver with dedicated UVLO (2.2V rising threshold), and dual OCP mechanisms-cycle-by-cycle peak limiting and valley-current detection-with hiccup-mode recovery under sustained overload. Thermal shutdown activates at 170°C with 30°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - Supports wide automotive battery transients including cold-crank (4.5V) and load-dump (36V). |
| Output Current | 1.5A continuous - Sustains full-rated load without derating up to +125°C junction temperature. |
| Switching Frequency | Default 2.2MHz, syncable 450kHz–2.2MHz - Enables compact magnetics and avoids AM band interference. |
| Feedback Reference | 0.807V ±13mV - Sets output voltage via external resistor divider; enables precise 3.3V/5V rail generation. |
| Power Good Threshold | 88% of VREF rising, 83% falling - Provides clean, hysteresis-stabilized enable signal for downstream sequencing. |
| Thermal Shutdown | 170°C activation, 140°C recovery - Protects against sustained overload while allowing automatic restart after cooling. |
| OCP Mechanism | Peak-current limit (2.4–6.0A) + valley-current detection (1.7–3.5A) - Prevents inductor saturation and runaway during short-circuit faults. |
| Package | QFN-13 (2.5mm × 3mm) with wettable flanks - Supports AOI-compatible solder joint inspection and enhanced thermal dissipation (θJA = 60°C/W). |
Pinout & Package
MPQ4415AGQB-Z is housed in a thermally enhanced, wettable-flank QFN-13 package (2.5mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports reflow soldering per JEDEC J-STD-020 and enables efficient heat transfer to PCB copper planes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 IN | Primary input supply | Accepts 4V–36V; requires low-ESR ceramic decoupling placed adjacent to pins with multiple vias to PGND. |
| 3 NC | No connection | Internally unconnected; must remain floating - no PCB trace or pad required. |
| 4 PG | Open-drain power-good indicator | Pulled low during startup/fault; rises after VOUT reaches 88% of target with 90μs delay - used for system sequencing. |
| 5 EN/SYNC | Enable and clock synchronization input | Logic-high (>1.45V) enables operation; external 450kHz–2.2MHz clock synchronizes switching edge - eliminates beat frequencies. |
| 6 FB | Resistor-divider feedback node | Senses output voltage; internal 0.807V reference sets regulation point - sensitive to noise; requires short, via-free routing. |
| 7 VCC | Internal bias regulator output | Supplies 4.9V ±4% to internal circuitry; requires 0.1μF–0.22μF ceramic decoupling directly at pin. |
| 8 AGND | Analog ground reference | Reference for error amplifier and logic; internally tied to PGND - no external connection needed. |
| 9 SW | Switch node | Drives external inductor; carries high di/dt - demands wide copper trace and minimized loop area with BST capacitor. |
| 10 BST | Bootstrap supply terminal | Connects to SW via 0.1μF capacitor and 20Ω series resistor - powers high-side gate driver; critical for >65% duty cycle. |
| 11–13 PGND | Power ground return | Low-impedance return path for HS/LS FETs and input/output capacitors - must be solid copper pour with multiple thermal vias. |
Key Features
| Feature | Design Value |
|---|---|
| Forced Continuous Conduction Mode (CCM) | Maintains fixed 2.2MHz switching across 0–100% load - eliminates audible noise and ensures predictable EMI profile at light loads. |
| Integrated Bootstrap Circuitry | Dedicated internal regulator charges BST capacitor to ~5V - eliminates need for external bootstrap diode in most applications. |
| CISPR25 Class 5 Compliance | Meets stringent automotive radiated emission limits without added filtering - reduces BOM cost and board space. |
| AEC-Q100 Grade 1 Qualification | Rated for -40°C to +125°C ambient operation with full electrical validation - suitable for engine bay and ADAS power supplies. |
| Valley-Current Detection OCP | Monitors inductor current at turn-off to prevent subharmonic oscillation and ensure robust short-circuit recovery. |
| Wettable Flank QFN Package | Side-wettable leads enable automated optical inspection of solder joints - improves manufacturing yield and field reliability. |
Applications
| Automotive Infotainment | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powering DSP, display controller, and USB hub in head-unit systems with 12V battery input subject to load dump and cold-crank. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator providing regulated, low-noise, sequenced power with PG signaling for SoC reset coordination. Use Value: AEC-Q100 Grade 1 rating ensures operation across full automotive temperature range; 2.2MHz switching avoids AM band interference in cabin audio systems. |
Use Scenario: Generating stable 1.8V core and 3.3V I/O rails for CMOS image sensors and ISP processors in surround-view cameras. IC Role / Device Role / Timing Role: High-efficiency, low-ripple step-down converter with fast transient response to handle sensor burst-mode current demands. Use Value: Forced CCM mode maintains consistent switching frequency during video frame capture; PG output triggers sensor initialization upon rail stabilization. |
| Industrial PLC I/O Module | Medical Portable Monitor |
|
Use Scenario: Powering isolated communication interfaces (RS-485, CAN) and microcontroller peripherals in DIN-rail mounted controllers. IC Role / Device Role / Timing Role: Input-filter tolerant buck converter accepting wide 9–36V DC input; provides tightly regulated 5V for analog front-end and digital logic. Use Value: 36V max input withstands industrial surge events; CISPR25 Class 5 compliance prevents EMI coupling into sensitive analog measurement circuits. |
Use Scenario: Supplying 3.3V and 5V rails to touchscreen controller, Wi-Fi module, and patient interface MCU in battery-powered vital signs monitors. IC Role / Device Role / Timing Role: Low-quiescent-current (0.8mA) buck regulator enabling extended battery life while maintaining fast wake-up response. Use Value: Internal soft-start (1.5ms) prevents inrush-induced brownout on shared Li-ion battery; wettable flank package ensures reliable reflow in high-mix medical assembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4420AGQ-AEC1 | 2A output current, same 4V–36V input, 2.2MHz default, but uses QFN-10 (3mm×3mm) package without wettable flanks. | Lacks wettable flanks and CISPR25 Class 5 certification - less suitable for high-reliability automotive production with AOI requirements. | Select when higher output current is required and AOI inspection is not mandated; verify thermal performance with larger θJA (65°C/W). |
| TPS54340QDDARQ1 | 3.5A output, 3.5V–42V input, 100kHz–2.5MHz adjustable frequency, but requires external bootstrap diode and has higher IQ (147μA shutdown). | Not wettable flank; lacks integrated valley-current OCP - requires additional external components for short-circuit robustness. | Choose for wider input range and higher current needs where design flexibility outweighs BOM simplification; validate layout for external BST diode placement. |
Compared with MPQ4415AGQB-Z, MPQ4420AGQ-AEC1 offers higher current but sacrifices AOI compatibility and EMI certification, while TPS54340QDDARQ1 extends input range and current but increases component count and layout complexity - MPQ4415AGQB-Z delivers optimal balance of integration, qualification, and manufacturability for compact automotive and industrial buck applications.
Availability
MPQ4415AGQB-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and industrial PLC I/O requiring stable component supply, AEC-Q100 compliance, and wettable-flank packaging for automated optical inspection.
Supply support for MPQ4415AGQB-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 design centers in the US, China, and Taiwan, and global distribution through authorized partners.
The MPQ4415A belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for demanding vehicle subsystems requiring AEC-Q100 qualification, high efficiency at light loads, and robust EMI performance in space-constrained environments.
FAQ
What is the purpose of the BST pin and why is a 20Ω resistor recommended?
The BST pin supplies gate drive voltage to the internal high-side MOSFET via a bootstrap capacitor charged from the SW node. A 20Ω resistor between SW and BST dampens ringing and reduces voltage spikes during switching transitions, improving reliability and EMI performance - omitting it risks overstress on the bootstrap circuit and inconsistent high-side turn-on.
Can MPQ4415AGQB-Z operate with input voltage below 4V?
No - the absolute minimum operating input is 4V per datasheet specifications. Below this, the internal regulator cannot sustain bias voltage, and UVLO (3.5V rising threshold) forces shutdown. Applications requiring <4V input must use a different topology, such as a buck-boost or LDO pre-regulator.
How does the PG pin behave during thermal shutdown?
During thermal shutdown, the PG pin is actively pulled low regardless of output voltage level - this provides immediate fault signaling to system controllers. PG remains low until both thermal recovery (die cools below 140°C) and output voltage stabilizes above 88% of target, ensuring safe restart only after thermal and regulation conditions are met.
Is external compensation required for stable operation?
No - the MPQ4415AGQB-Z features an optimized internal compensation network designed for standard 2.2µH inductors and ceramic output capacitors. External compensation is unnecessary for typical applications; only specialized cases (e.g., ultra-low ESR tantalum outputs or non-standard L/C ratios) may require adjustment per the datasheet's Type II compensation guidelines.
What distinguishes the "-Z" suffix in MPQ4415AGQB-Z?
The "-Z" suffix denotes tape-and-reel packaging per EIA-481 standard, with 3,000 units per reel - standard for automated SMT assembly. It does not indicate functional or parametric differences from MPQ4415AGQB; all electrical, thermal, and qualification characteristics remain identical to the base part number.
Does the device support spread-spectrum frequency modulation?
No - MPQ4415AGQB-Z does not implement spread-spectrum modulation. It relies on fixed-frequency operation (2.2MHz default) combined with CISPR25 Class 5–compliant layout and filtering to meet automotive EMI requirements. Frequency synchronization is supported, but intentional dithering is not included in the design.
How is the soft-start time determined and can it be adjusted?
The soft-start time is internally fixed at 1.5ms (typical), defined by the ramp rate of the internal soft-start voltage (VSS) charging the error amplifier reference. It is not user-adjustable via external components - this ensures consistent, repeatable startup behavior across temperature and process variation without adding design complexity.
MPQ4415AGQB-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 13-PowerVQFN
- 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):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 30.6V
- Current - Output:
- 1.5A
- Frequency - Switching:
- 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 13-QFN (2.5x3)
MPQ4415AGQB-Z FAQ
1.How can I place an order for MPQ4415AGQB-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4415AGQB-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 MPQ4415AGQB-Z reliable?
The price and inventory of MPQ4415AGQB-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4415AGQB-Z is usually 5 days.
3.What payment methods are accepted for MPQ4415AGQB-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4415AGQB-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4415AGQB-Z?
MPQ4415AGQB-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4415AGQB-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 MPQ4415AGQB-Z?
For technical support, including MPQ4415AGQB-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4415AGQB-Z requirements.
6.How does Aetrix verify that MPQ4415AGQB-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4415AGQB-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 MPQ4415AGQB-Z meets industry standards.
7.What is the process for return or replacement of MPQ4415AGQB-Z?
All MPQ4415AGQB-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4415AGQB-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 MPQ4415AGQB-Z part is unused and in its original packaging.
Return procedure for MPQ4415AGQB-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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