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Monolithic Power Systems Inc. MPQ4569GQ-AEC1-P
- Part No.:
- MPQ4569GQ-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ4569GQ-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 300MA 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,532
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Product details
Overview
MPQ4569GQ-AEC1-P from Monolithic Power Systems is a 75V, 0.3A AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter with integrated high-side (1.2Ω) and low-side (0.45Ω) MOSFETs, 1V reference voltage output, and programmable soft-start - designed for automotive power rails requiring wide-input (4.5V–75V), ultra-low quiescent current (20μA active / 5μA shutdown), and thermal fault protection.
For engineers reviewing the MPQ4569GQ-AEC1-P datasheet, MPQ4569GQ-AEC1-P pinout, MPQ4569GQ-AEC1-P application, or MPQ4569GQ-AEC1-P equivalent, this page delivers verified technical context, QFN-10 pin-level design meaning, automotive-grade reliability validation, and real-world selection guidance for battery-supplied ADAS modules, infotainment power domains, and body control units.
Technical Context
The MPQ4569GQ-AEC1-P implements a current-mode PWM control scheme with zero-current detection (ZCD) and precision 1V FB reference (±1% at 25°C, ±2% over –40°C to +125°C), enabling stable regulation across wide VIN and load ranges. Its adaptive frequency scaling under light load reduces switching losses while maintaining output accuracy.
It integrates a dedicated BIAS pin that accepts 2.9V–5.5V external bias to power internal circuitry and LS-FET driver, improving efficiency versus VIN-only operation. The VREF pin (QFN-only) provides a buffered 1V reference with 500μA sourcing capability, decoupling feedback stability from divider resistor selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports direct connection to automotive battery (cold-crank down to 4.5V) and industrial 48V systems without pre-regulation. |
| Output Current | 0.3A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in distributed automotive subsystems. |
| Quiescent Current | 20μA (active), 5μA (shutdown) - enables >1-year battery standby in always-on vehicle modules without parasitic drain. |
| Feedback Reference | 1.0V ±1% (25°C), ±2% (–40°C to +125°C) - ensures tight output regulation tolerance across full automotive temperature range. |
| Internal MOSFETs | HS: 1.2Ω, LS: 0.45Ω (25°C) - minimizes conduction loss at 0.3A, enabling >90% peak efficiency at 12V→3.3V conversion. |
| Soft-Start Control | External capacitor-programmable - prevents inrush current and output overshoot during cold-start or reset events in safety-critical ECUs. |
| Thermal Protection | 175°C shutdown with 20°C hysteresis - guarantees safe recovery after transient overload without latch-off or manual reset. |
Pinout & Package
MPQ4569GQ-AEC1-P is housed in a thermally enhanced QFN-10 (3mm × 3mm, 0.5mm pitch) package with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counterclockwise. GND (Pin 1), VIN (Pin 2), EN (Pin 3), VREF (Pin 4), FB (Pin 5), SS (Pin 6), POK (Pin 7), BIAS (Pin 8), BST (Pin 9), and SW (Pin 10) form a layout-optimized signal/power separation for minimal EMI and thermal resistance (θJA = 50°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Primary return path for high-frequency switch currents; must be connected directly to output capacitor negative terminal to minimize loop inductance. |
| VIN (Pin 2) | Main input supply | Accepts 4.5V–75V; requires local 10μF/100V ceramic bypass capacitor placed <1mm from pin to suppress switching noise. |
| EN (Pin 3) | Enable control input | Active-high logic (1.55V rising threshold); floating state disables device; internal 3MΩ pull-down ensures fail-safe shutdown. |
| VREF (Pin 4) | 1V reference output | Buffered 1V source (500μA max); used as alternative reference for precision feedback or external monitoring circuits. |
| FB (Pin 5) | Feedback sensing node | Compares resistive divider output against internal 1V reference; 50nA max input bias current enables MΩ-range dividers for low IQ. |
| SS (Pin 6) | Soft-start timing control | Charged by internal 5μA current source; 1μF capacitor yields ~200ms ramp time, preventing output overshoot during startup. |
| POK (Pin 7) | Open-drain power-good flag | Asserts HIGH when VOUT ≥90% of nominal; pulled LOW during shutdown or undervoltage - enables system-level power sequencing. |
| BIAS (Pin 8) | Bias supply input | Accepts 2.9V–5.5V regulated rail (e.g., post-regulated 3.3V) to power internal logic and LS-FET driver, reducing VIN current draw and improving efficiency. |
| BST (Pin 9) | Bootstrap supply for HS-FET gate | Connects via 0.1μF ceramic capacitor to SW; internal regulator maintains ~5V BST-SW differential for reliable high-side drive. |
| SW (Pin 10) | Switch node | Drives external inductor; carries high di/dt; must be routed short and wide, isolated from analog traces (FB, SS, VREF) to prevent coupling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for operation from –40°C to +125°C junction temperature - meets automotive power supply requirements for engine bay and cabin modules. |
| Programmable soft-start | Capacitor-controlled ramp eliminates output overshoot and inrush stress on downstream LDOs or microcontroller I/Os during ignition cycles. |
| Low-noise 1V reference (VREF) | Stable, buffered 1V output enables accurate secondary regulation or ADC reference without external buffer, reducing BOM count. |
| Adaptive frequency scaling | Reduces switching frequency under light load to cut gate and switching losses - extends battery life in sleep-mode vehicle subsystems. |
| Integrated power MOSFETs | 1.2Ω HS and 0.45Ω LS FETs eliminate external discrete switches and associated gate drivers - simplifies layout and improves reliability. |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC Rail |
|---|---|
|
Use Scenario: Powering 3.3V/0.25A image sensor and ISP in rear-view camera exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Primary buck regulator delivering stable 3.3V from 9V–16V battery with cold-crank hold-up down to 4.5V. Use Value: 5μA shutdown current prevents battery drain during vehicle off-state; thermal shutdown protects against sustained 85°C ambient exposure. |
Use Scenario: Generating 1.1V core voltage for ARM-based infotainment processor with dynamic load steps up to 0.3A. IC Role / Device Role / Timing Role: Synchronous step-down controller with fast transient response enabled by ZCD and 1V FB reference. Use Value: Programmable soft-start prevents brown-out during processor boot; BIAS pin allows efficient use of intermediate 3.3V rail instead of VIN. |
| Body Control Unit (BCU) Subsystem | Telematics Control Unit (TCU) Backup Supply |
|
Use Scenario: Providing 5V/0.2A for LIN transceivers, door lock actuators, and ambient lighting in centralized BCU. IC Role / Device Role / Timing Role: Wide-input buck converter supporting 12V/24V dual-battery architectures with UVLO hysteresis (0.45V) for clean start-stop transitions. Use Value: POK output sequences MCU wake-up only after stable 5V is established; QFN-10 package enables compact placement near load. |
Use Scenario: Maintaining 3.3V/100mA backup rail for GPS module and RTC during main battery disconnect in emergency call systems. IC Role / Device Role / Timing Role: Low-IQ buck regulator operating from supercapacitor or backup battery with 75V absolute max rating for surge immunity. Use Value: 20μA active IQ extends supercap runtime; 80V absolute max VIN withstands ISO 7637-2 pulse 5a (load dump) without external TVS. |
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 |
|---|---|---|---|
| MPQ4572GQ-AEC1 | Higher 0.6A output, same 75V input, but no VREF pin and larger QFN-12 package. | Lacks buffered 1V reference; unsuitable where external monitoring or precision secondary regulation is required. | Select MPQ4572GQ-AEC1 only if higher current is needed and VREF functionality is unnecessary. |
| LM61480-Q1 | TI part with 3.5V–36V input, 8A output, and spread-spectrum EMI reduction - not 75V-rated. | Cannot replace MPQ4569GQ-AEC1 in 48V or load-dump-prone 12V automotive systems due to lower VIN max rating. | Choose LM61480-Q1 only for lower-voltage, high-current applications where EMI compliance is critical and 75V operation is not required. |
Compared with MPQ4569GQ-AEC1-P, MPQ4572GQ-AEC1 trades VREF functionality and compact QFN-10 for higher current, while LM61480-Q1 offers advanced EMI features but lacks the 75V input capability essential for robust automotive front-end regulation.
Availability
MPQ4569GQ-AEC1-P is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power rails, and body control unit subsystems requiring stable component supply with AEC-Q100 Grade 1 assurance and long-term lifecycle support.
Supply support for MPQ4569GQ-AEC1-P 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, ultra-low IQ, and integrated MOSFETs for space-constrained ECU designs.
FAQ
What is the function of the VREF pin on MPQ4569GQ-AEC1-P?
The VREF pin outputs a buffered 1.0V reference voltage with up to 500μA sourcing capability. It is exclusive to the QFN-10 package and serves as a stable, low-noise reference for external monitoring circuits, secondary LDOs, or ADC references - eliminating need for an external voltage reference IC in precision power monitoring designs.
Can MPQ4569GQ-AEC1-P operate from a 48V industrial bus?
Yes. With a 4.5V to 75V input range and 80V absolute maximum VIN rating, MPQ4569GQ-AEC1-P is fully compatible with 48V systems including PoE++ infrastructure, telecom rectifiers, and industrial PLC backplanes - provided thermal design accommodates power dissipation at high VIN/VOUT differentials.
How does the BIAS pin improve efficiency?
The BIAS pin accepts a regulated 2.9V–5.5V supply (e.g., post-regulated 3.3V) to power internal circuitry and the low-side FET driver. This reduces current drawn from VIN, lowering total input power and improving conversion efficiency - especially beneficial in multi-rail systems where an intermediate rail is already available.
Is the POK output compatible with 1.8V logic microcontrollers?
Yes. POK is an open-drain output with 0.4V max VOL at 1mA sink current. When pulled up to 1.8V with a 10kΩ resistor, it reliably asserts HIGH (>1.4V) when VOUT exceeds 90% of nominal, meeting standard 1.8V GPIO input thresholds without level-shifting.
What is the minimum inductor value supported for 75V input?
Based on 120ns minimum on-time and 0.72A peak current limit, the minimum inductance is 12.5μH at 75V input and 3.3V output. However, 33μH is recommended per typical application to ensure stable operation, adequate ripple control, and margin for worst-case load transients.
Does MPQ4569GQ-AEC1-P require an external bootstrap diode?
No. The device integrates a dedicated internal bootstrap regulator that charges the BST–SW capacitor from VIN during low-side FET conduction. An external diode is unnecessary - only a 0.1μF ceramic capacitor between BST and SW is required per layout guidelines.
How is UVLO threshold adjusted using the EN pin?
An external resistor divider from VIN to EN sets effective UVLO: rising threshold = VIN × [R2 / (R1 + R2∥3MΩ)]. For example, R1 = 1.2MΩ and R2 = 523kΩ yields ~12.5V rising UVLO - enabling customized startup behavior for battery-backed systems or redundant power supervision.
MPQ4569GQ-AEC1-P 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-P FAQ
1.How can I place an order for MPQ4569GQ-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4569GQ-AEC1-P 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-P reliable?
The price and inventory of MPQ4569GQ-AEC1-P 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-P is usually 5 days.
3.What payment methods are accepted for MPQ4569GQ-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4569GQ-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4569GQ-AEC1-P?
MPQ4569GQ-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4569GQ-AEC1-P 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-P?
For technical support, including MPQ4569GQ-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4569GQ-AEC1-P requirements.
6.How does Aetrix verify that MPQ4569GQ-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4569GQ-AEC1-P 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-P meets industry standards.
7.What is the process for return or replacement of MPQ4569GQ-AEC1-P?
All MPQ4569GQ-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4569GQ-AEC1-P, 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-P part is unused and in its original packaging.
Return procedure for MPQ4569GQ-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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