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Monolithic Power Systems Inc. MPQ4569GQ-AEC1-Z
- Part No.:
- MPQ4569GQ-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ4569GQ-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 300MA 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,000
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Product details
Overview
MPQ4569GQ-AEC1-Z from Monolithic Power Systems is a 75V, 0.3A AEC-Q100 Grade 1 qualified synchronous step-down converter with integrated 1.2Ω high-side and 0.45Ω low-side MOSFETs, 1V reference voltage output (QFN package), programmable soft-start, and 5μA shutdown current - designed for automotive front-end power rails supplying infotainment, ADAS camera modules, and body control units.
For engineers reviewing the MPQ4569GQ-AEC1-Z datasheet, MPQ4569GQ-AEC1-Z pinout, MPQ4569GQ-AEC1-Z application, or MPQ4569GQ-AEC1-Z equivalent, this page delivers verified electrical parameters, QFN-10 pin mapping, thermal shutdown behavior, POK functionality, and validated automotive-grade alternatives aligned to ISO 26262 functional safety readiness.
Technical Context
The MPQ4569GQ-AEC1-Z implements a constant-on-time (COT) control scheme with zero-current detection (ZCD) and internal 1V reference comparator, enabling fast transient response without external compensation. Its dual-mode operation scales switching frequency under light load to reduce gate driver and switching losses while maintaining regulation down to 1V output.
It integrates a dedicated BIAS pin that accepts 2.9–5.5V input to power internal circuitry and LS-FET driver, improving efficiency over VIN-only biasing. The POK open-drain output asserts HIGH when VOUT exceeds 90% of nominal FB reference and pulls LOW during shutdown or undervoltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports cold-crank (4.5V) and load-dump (75V) transients in 12V/24V/48V automotive systems. |
| Output Current | 0.3A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in distributed ECUs. |
| Quiescent Current | 20μA active mode - enables always-on subsystems (e.g., door module wake-up logic) without excessive battery drain. |
| Shutdown Current | 5μA across -40°C to +125°C - ensures compliance with automotive sleep-mode leakage budgets. |
| FB Reference Accuracy | ±1% at 25°C, ±2% over full temperature - enables stable 3.3V or 5V rail generation with <±33mV error at 3.3V output. |
| Thermal Shutdown | 175°C activation with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Minimum On-Time | 120ns - supports high VIN-to-VOUT ratios (e.g., 48V→3.3V) without pulse-skipping instability. |
Pinout & Package
MPQ4569GQ-AEC1-Z is housed in a thermally enhanced QFN-10 (3mm × 3mm) package with exposed thermal pad, optimized for automotive PCB layouts requiring minimal footprint and efficient heat dissipation via GND-connected copper pour.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power Ground | Primary return path for high-current switch node and output capacitor; must be connected directly to thermal pad and large copper area. |
| 2 VIN | Input Supply | High-voltage DC input (4.5–75V); requires local 10μF/100V ceramic bypass capacitor placed adjacent to pin. |
| 3 EN | Enable Control | Active-HIGH logic input; internal 3MΩ pull-down ensures safe default-off state; clamped to 6.5V zener for robustness. |
| 4 VREF | Reference Output | 1V precision reference source (500μA sink/source capability); used for feedback divider and external circuit biasing. |
| 5 FB | Feedback Input | Compares resistive divider output against internal 1V reference; tolerance determines output voltage accuracy. |
| 6 SS | Soft-Start Control | Accepts external capacitor to linearly ramp reference voltage and prevent output overshoot during startup/recovery. |
| 7 POK | Power Good | Open-drain output asserting HIGH only when VOUT ≥ 90% of nominal; pulled LOW during shutdown or fault. |
| 8 BIAS | Bias Supply | Accepts regulated 2.9–5.5V supply to power internal regulator and LS-FET driver, reducing VIN current draw and improving efficiency. |
| 9 BST | Bootstrap Supply | Charges high-side gate driver via external capacitor to SW; requires 0.1μF ceramic capacitor between BST and SW. |
| 10 SW | Switch Node | Drives external inductor; carries high di/dt current; must be routed short and away from analog traces (FB, SS, POK). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 Qualification | Validated for operation from −40°C to +125°C junction temperature - meets automotive ECU ambient requirements. |
| Integrated High/Low-Side MOSFETs | 1.2Ω HS-FET + 0.45Ω LS-FET - eliminates external FETs and gate drivers, reducing BOM count and layout complexity. |
| Programmable Soft-Start | External capacitor sets ramp time - prevents inrush current and stabilizes startup into pre-biased outputs. |
| Open-Drain POK Output | Monitors output regulation status independently of EN state - enables system-level power sequencing and fault logging. |
| Bootstrap Charging Management | Dedicated internal regulator charges BST capacitor to ~5V - ensures reliable high-side drive even during deep discharge events. |
Applications
| Infotainment Head Unit Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in vehicle infotainment head units operating from 12V battery with load-dump immunity. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck converter delivering regulated rail with POK signaling to MCU for safe boot sequence initiation. Use Value: 75V input rating withstands ISO 7637-2 Pulse 5a (load dump up to 60V), while 5μA shutdown current preserves battery life during vehicle sleep mode. | Use Scenario: Supplies image sensor, ISP, and serializer in rear-view or surround-view camera modules mounted in exterior locations. IC Role / Device Role / Timing Role: Point-of-load regulator generating stable 1.8V or 2.8V for CMOS image sensor core, with thermal shutdown protecting against enclosure overheating. Use Value: AEC-Q100 qualification ensures reliability at +105°C ambient; 120ns minimum on-time supports 48V→2.8V conversion without duty-cycle limitation. |
| Body Control Module (BCM) | Automotive Gateway ECU |
Use Scenario: Provides auxiliary 3.3V rail for LIN transceivers, door lock actuators, and ambient light sensors in centralized BCMs. IC Role / Device Role / Timing Role: Secondary buck converter downstream of main 5V rail, enabled via MCU GPIO to manage subsystem power states. Use Value: EN pin's 1.2V falling threshold and internal pull-down enable deterministic power gating; 20μA quiescent current meets ULP requirements. | Use Scenario: Generates isolated 3.3V supply for CAN FD controller and Ethernet PHY in multi-protocol automotive gateways. IC Role / Device Role / Timing Role: High-voltage input buck converter feeding isolated DC/DC stage, with POK confirming rail stability before CAN initialization. Use Value: BIAS pin allows connection to post-regulated 5V rail, reducing VIN current by >30% and lowering thermal stress on upstream converters. |
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 |
|---|---|---|---|
| LM61480-Q1 | 4.5–60V input, 8A output, fixed 2.1MHz frequency, no VREF pin, higher IQ (26μA) | Targets high-current ADAS domain controllers; lacks reference output for external biasing | Select when >1A output or fixed-frequency EMI control is required; not suitable for low-IQ always-on nodes |
| TPS543B20 | 4.5–20V input, 3A output, PMBus interface, 1% FB accuracy, no AEC-Q100 grade | Designed for server/compute power; lacks automotive qualification and high-voltage tolerance | Choose for digitally programmable POL in non-automotive industrial systems; avoid for automotive due to missing AEC-Q100 and 75V rating |
Compared with LM61480-Q1 and TPS543B20, MPQ4569GQ-AEC1-Z uniquely combines 75V input tolerance, 5μA shutdown current, integrated VREF, and AEC-Q100 Grade 1 - making it optimal for cost-sensitive, low-power automotive subsystems where voltage resilience and battery longevity are critical.
Availability
MPQ4569GQ-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MPQ4569GQ-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4569 product line targets automotive power conversion, delivering high-voltage synchronous buck regulators with AEC-Q100 qualification, low quiescent current, and integrated protection features for next-generation E/E architectures.
FAQ
What is the purpose of the BIAS pin on MPQ4569GQ-AEC1-Z?
The BIAS pin accepts a regulated 2.9–5.5V supply to power the internal regulator and low-side FET driver, reducing VIN current draw and improving overall efficiency. When connected to the output rail (e.g., 3.3V or 5V), it lowers quiescent current by bypassing the VIN-based internal regulator, especially beneficial in high-input-voltage applications like 48V systems.
How does the POK pin function during startup and fault conditions?
The POK pin is an open-drain output that remains LOW during shutdown, startup, or when VOUT falls below 90% of its nominal value. It transitions HIGH only after VOUT stabilizes within regulation and remains HIGH until undervoltage, overtemperature, or EN deactivation occurs. Its 40μs deglitch timer prevents false triggering from transient ripple.
Can MPQ4569GQ-AEC1-Z operate with an input voltage below 4.5V?
No - the device incorporates an internal UVLO with a rising threshold of 4.2V (±0.3V) and hysteresis of 0.45V. Operation below 3.75V (falling threshold) disables switching. External resistor dividers on the EN pin can raise effective UVLO, but VIN itself must exceed 4.5V for guaranteed regulation per datasheet specifications.
What is the maximum recommended output capacitance for stable operation?
The datasheet specifies stable operation with up to 100μF total output capacitance using low-ESR ceramic or polymer capacitors. Exceeding this may destabilize the COT control loop due to increased phase lag; for >100μF designs, a feedforward capacitor (e.g., 39pF from VOUT to FB) is mandatory to suppress switching frequency jitter caused by FB noise sensitivity.
Is the VREF pin usable as a precision voltage reference for external circuitry?
Yes - the VREF pin delivers a 1V ±1% (25°C) / ±2% (−40°C to +125°C) reference with 500μA sourcing/sinking capability. It is electrically isolated from switching noise and intended for biasing external op-amps, ADC references, or sensor excitation circuits - provided load current stays within specified limits and layout avoids coupling from SW or GND return paths.
How does the soft-start capacitor value affect startup behavior?
The SS pin is charged by a 5μA internal current source; soft-start time (tSS) equals CSS × 1V ÷ 5μA. For example, a 100nF capacitor yields 20ms ramp time. Larger values extend startup duration and reduce inrush, but excessively long ramps may delay system boot timing or cause timeout in host MCU power sequencing logic.
Does MPQ4569GQ-AEC1-Z support forced PWM mode?
No - the device operates exclusively in auto-mode (diode emulation at light load) with frequency scaling. There is no pin or register to force continuous conduction mode (CCM). This architecture minimizes light-load losses but introduces variable switching frequency, requiring EMI filter design to accommodate the full operational range (≈100kHz to 2.2MHz depending on load and VIN).
MPQ4569GQ-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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):
- 4.5V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 1V
- Voltage - Output (Max):
- 67.5V
- Current - Output:
- 300mA
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MPQ4569GQ-AEC1-Z FAQ
1.How can I place an order for MPQ4569GQ-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4569GQ-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 MPQ4569GQ-AEC1-Z reliable?
The price and inventory of MPQ4569GQ-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 MPQ4569GQ-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4569GQ-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4569GQ-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4569GQ-AEC1-Z?
MPQ4569GQ-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4569GQ-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 MPQ4569GQ-AEC1-Z?
For technical support, including MPQ4569GQ-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4569GQ-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4569GQ-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4569GQ-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 MPQ4569GQ-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4569GQ-AEC1-Z?
All MPQ4569GQ-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4569GQ-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 MPQ4569GQ-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4569GQ-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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