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Monolithic Power Systems Inc. MPQ4436AGRE-33-AEC1-Z
- Part No.:
- MPQ4436AGRE-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-PowerVFQFN
- Datasheet:
-
MPQ4436AGRE-33-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.3V 6A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ4436AGRE-33-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, fixed 3.3V-output synchronous step-down converter with integrated 48mΩ high-side and 20mΩ low-side MOSFETs, delivering up to 6A continuous output current across a 3.3V–45V input range. It features 1.7μA shutdown quiescent current, configurable 350kHz–1000kHz switching frequency, and power-good (PG) monitoring for automotive infotainment and ADAS power rails.
For engineers reviewing the MPQ4436AGRE-33-AEC1-Z datasheet, MPQ4436AGRE-33-AEC1-Z pinout, MPQ4436AGRE-33-AEC1-Z application, or MPQ4436AGRE-33-AEC1-Z equivalent, key selection criteria include cold-crank low-dropout operation, AAM/FCCM mode selection, wettable flank QFN-20 package compliance, and CISPR25 Class 5 EMI performance in automotive environments.
Technical Context
The MPQ4436AGRE-33-AEC1-Z implements current-mode control with fast transient response and integrates both HS-FET and LS-FET in a single QFN-20 package. Its 100ns minimum on-time and frequency foldback support stable operation during automotive cold-crank (VIN down to 3.3V) and prevent inductor current runaway at startup.
It supports external synchronization via SYNCIN (350kHz–1000kHz), provides 180° out-of-phase SYNCO output, and includes selectable Advanced Asynchronous Modulation (AAM) for light-load efficiency or Forced Continuous Conduction Mode (FCCM) for fixed-frequency noise control - critical for EMI-sensitive clusters and camera modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 45V - supports full automotive battery range including cold-crank (≥3.3V) and load-dump transients. |
| Output Voltage | Fixed 3.3V ±2% - factory-trimmed for precision rail generation without external feedback resistors. |
| Max Output Current | 6A continuous - enables single-chip supply for multi-core MCU or SoC subsystems in ADAS ECUs. |
| Quiescent Current | 1.7μA in shutdown - preserves battery life in always-on vehicle networks (e.g., CAN wake-up circuits). |
| Switching Frequency | Configurable 350kHz–1000kHz via FREQ pin resistor - allows EMI optimization and inductor size trade-off. |
| Thermal Protection | 170°C thermal shutdown with 20°C hysteresis - ensures fault-tolerant operation under sustained overload or poor PCB heatsinking. |
| EMI Performance | CISPR25 Class 5 compliant - meets stringent radiated/ conducted emission limits for automotive front-end electronics. |
Pinout & Package
MPQ4436AGRE-33-AEC1-Z is housed in a wettable flank QFN-20 (4mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced thermal dissipation in automotive PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 MODE | AAM/FCCM selection | Pull high for forced CCM (fixed fSW); pull low for AAM (pulse-skipping at light load) - directly controls efficiency vs. noise trade-off. |
| 2 SYNCIN | External clock input | Accepts 350kHz–1000kHz sync signal; enables multi-regulator phase alignment to suppress beat frequencies in multi-rail systems. |
| 3,12 VIN | Main input supply | Power source for internal circuitry and HS-FET; requires local ceramic decoupling to suppress switching noise. |
| 4,5,10,11 PGND | Power ground return | Low-impedance path for high di/dt switch currents; must be connected to thermal pad and separated from AGND. |
| 6 BST | Bootstrap supply | Drives HS-FET gate; requires 0.1μF ceramic capacitor between BST and SW to sustain gate voltage during high-duty cycles. |
| 7,8 SW | Switch node | Connection point of internal HS/LS FETs; high dv/dt node requiring minimized trace area and guard ring layout. |
| 9 EN | Enable control | Logic-level input (0.85V threshold); enables soft-start sequencing when pulled high after system power-up. |
| 13 SYNCO | Synchronized clock output | 180° out-of-phase with internal oscillator or SYNCIN - used to synchronize secondary regulators in distributed power architectures. |
| 14 PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±5% of 3.3V - feeds MCU reset or supervisor IC for rail validation. |
| 15 NC | No-connect terminal | Must be tied to VCC or VOUT ≥3V; floating connection risks latch-up or ESD susceptibility. |
| 16 VCC | Bias supply | Internal LDO output (4.9V typical); powers control logic and gate drivers - requires 1μF ceramic bypass to PGND. |
| 17 AGND | Analog ground reference | Reference for FB, SS, MODE, and PG; must be star-connected to PGND at single point to avoid noise coupling. |
| 18 FB | Feedback input | Direct connection to VOUT; no vias allowed - ensures accurate regulation by minimizing parasitic impedance in feedback path. |
| 19 SS | Soft-start timing | 6μA current source charges external capacitor; sets ramp time to limit inrush current during power-up (e.g., 2.2nF = ~1.5ms). |
| 20 FREQ | Frequency setting | Resistor-to-GND sets fSW (e.g., 62kΩ → 470kHz); enables precise EMI band placement without changing inductors. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable Flank QFN-20 | Enables automated solder-joint inspection per IPC-A-610; improves reliability verification in high-volume automotive assembly. |
| AEC-Q100 Grade 1 | Qualified for -40°C to +125°C ambient operation - validated for engine bay and dashboard-mounted electronics. |
| Low-Dropout Mode | Maintains regulation down to VIN = VOUT + 0.5V - sustains 3.3V output during 6V cold-crank events without dropout. |
| Hiccup Over-Current Protection | Auto-retry current limiting with thermal foldback - protects against sustained short-circuit without latch-off or manual reset. |
| Frequency Spread Spectrum (FSS) | Reduces peak EMI amplitude by spreading switching energy across ±10% bandwidth - aids CISPR25 Class 5 compliance. |
| 18μA Sleep Mode IQ | Enables ultra-low-power standby in always-on domains (e.g., telematics wake-on-LIN) while retaining fast wake-up capability. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powers SoC, DDR memory, and display interface in central infotainment units with variable load profiles and strict EMI limits. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic and I/O rails; synchronized via SYNCIN to avoid interference with video clock domains. Use Value: AAM mode reduces idle power consumption below 100μA, extending battery backup runtime during ignition-off states. |
Use Scenario: Supplies image sensor, ISP, and serializer in forward-facing ADAS cameras exposed to wide temperature and vibration. IC Role / Device Role / Timing Role: Fixed 3.3V regulator with hiccup OCP and thermal shutdown - ensures fail-safe behavior during lens heater surges or connector faults. Use Value: Low-dropout mode maintains regulated output during 6V cold-crank, preventing camera blackouts during engine start. |
| Automotive Digital Instrument Cluster | Industrial Vehicle Telematics Gateway |
|
Use Scenario: Delivers clean 3.3V rail to TFT LCD controller, microcontroller, and CAN transceivers in driver-facing digital dashboards. IC Role / Device Role / Timing Role: Synchronous buck with PG output feeding cluster MCU reset logic - validates rail integrity before boot sequence initiation. Use Value: Wettable flank package enables AOI detection of solder voids, improving field reliability in safety-critical display systems. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element in fleet management gateways operating across commercial vehicle fleets. IC Role / Device Role / Timing Role: High-input-range buck converter accepting 9V–36V nominal truck battery; withstands 45V load-dump transients per ISO 7637-2. Use Value: 1.7μA shutdown current minimizes parasitic drain on auxiliary batteries during extended parking periods. |
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 |
|---|---|---|---|
| MPQ4433AGRE-33-AEC1-Z | 4A max output, same 3.3V fixed output and QFN-20 wettable flank package; lacks SYNCO and FSS. | Lower current capacity suits smaller MCUs or sensors; insufficient for 6A ADAS SoCs. | Select when system load ≤4A and EMI requirements are less stringent than CISPR25 Class 5. |
| TPS546B24RVFT | 6A, 3.3V adjustable (not fixed), 4.5V–18V input, non-AEC-Q100; includes PMBus interface and telemetry. | Requires external feedback resistors; not qualified for automotive temperature or reliability stress testing. | Choose for industrial or test-bench use where digital monitoring and flexibility outweigh AEC-Q100 compliance needs. |
Compared with MPQ4436AGRE-33-AEC1-Z, the MPQ4433 variant trades 2A output and advanced EMI features for cost reduction, while the TPS546B24 offers configurability and telemetry at the expense of automotive qualification and fixed-output simplicity.
Availability
MPQ4436AGRE-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and digital instrument clusters requiring stable component supply with AEC-Q100 Grade 1 assurance and wettable flank inspection capability.
Supply support for MPQ4436AGRE-33-AEC1-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 manufacturing partnerships.
The MPQ4436A product line targets automotive power conversion with AEC-Q100 qualification, emphasizing robustness in harsh environments, low EMI, and seamless integration into safety-critical electronic control units.
FAQ
What is the purpose of the MODE pin on MPQ4436AGRE-33-AEC1-Z?
The MODE pin selects between Advanced Asynchronous Modulation (AAM) and Forced Continuous Conduction Mode (FCCM). Pulling it low enables AAM for higher light-load efficiency via pulse-skipping; pulling it high forces FCCM for consistent switching frequency and lower EMI peaks. Leaving it floating is prohibited and may cause erratic operation.
Can MPQ4436AGRE-33-AEC1-Z operate during automotive cold-crank conditions?
Yes. With a 3.3V minimum input rating and low-dropout mode, it maintains regulated 3.3V output even when battery voltage sags to 6V during cranking. The device sustains operation down to VIN = VOUT + 0.5V, ensuring uninterrupted power to critical ADAS or cluster subsystems.
How is the switching frequency set on this device?
Switching frequency is set by connecting a resistor from the FREQ pin to GND. For example, a 62kΩ resistor yields 470kHz, while 26.1kΩ sets 1000kHz. The fSW vs. RFREQ curve in the datasheet (page 15) provides exact values, enabling precise EMI band placement without inductor changes.
Is external compensation required for MPQ4436AGRE-33-AEC1-Z?
No. The MPQ4436AGRE-33-AEC1-Z uses internal compensation optimized for stability with standard 4.7μH inductors and ceramic output capacitors. No external Type II or Type III compensation network is needed, simplifying layout and reducing BOM count.
What does the PG (power-good) signal indicate, and how is it used?
The open-drain PG pin asserts high when VOUT is within 95%–105% of 3.3V (i.e., 3.135V–3.465V) and goes low outside that window. It requires an external pull-up resistor and is typically connected to a microcontroller's reset or interrupt pin to validate power integrity before firmware execution.
Does MPQ4436AGRE-33-AEC1-Z support synchronization with other regulators?
Yes. The SYNCIN pin accepts an external 350kHz–1000kHz clock to lock the internal oscillator, while SYNCO outputs a 180° phase-shifted signal. This enables interleaved operation with secondary regulators to reduce input ripple and system-level EMI in multi-rail automotive designs.
What is the thermal performance of the QFN-20 package under 6A load?
On a 4-layer 2oz copper evaluation board (EVB), junction-to-ambient thermal resistance θJA is 23°C/W. At 6A output with 12V input, typical power dissipation is ~1.2W, resulting in ~28°C temperature rise above ambient - well within the 150°C max junction limit and thermal shutdown threshold.
MPQ4436AGRE-33-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 20-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 45V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 6A
- Frequency - Switching:
- 350kHz ~ 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (4x4)
MPQ4436AGRE-33-AEC1-Z FAQ
1.How can I place an order for MPQ4436AGRE-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4436AGRE-33-AEC1-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 MPQ4436AGRE-33-AEC1-Z reliable?
The price and inventory of MPQ4436AGRE-33-AEC1-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4436AGRE-33-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4436AGRE-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4436AGRE-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4436AGRE-33-AEC1-Z?
MPQ4436AGRE-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4436AGRE-33-AEC1-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 MPQ4436AGRE-33-AEC1-Z?
For technical support, including MPQ4436AGRE-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4436AGRE-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4436AGRE-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4436AGRE-33-AEC1-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 MPQ4436AGRE-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4436AGRE-33-AEC1-Z?
All MPQ4436AGRE-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4436AGRE-33-AEC1-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 MPQ4436AGRE-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4436AGRE-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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