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Monolithic Power Systems Inc. MPQ4569GN-P
- Part No.:
- MPQ4569GN-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MPQ4569GN-P.pdf
- Description:
- IC REG BUCK ADJ 300MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,676
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Product details
Overview
MPQ4569GN-P from Monolithic Power Systems is a 75V, 0.3A AEC-Q100 Grade 1 synchronous step-down converter with integrated high-side (1.2Ω) and low-side (0.45Ω) MOSFETs, 1% FB reference accuracy at room temperature, programmable soft-start, and 5μA shutdown current - designed for automotive power rails requiring wide-input operation and thermal robustness.
For engineers reviewing the MPQ4569GN-P datasheet, MPQ4569GN-P pinout, MPQ4569GN-P application, or MPQ4569GN-P equivalent, this device supports precise 3.3V/300mA output in harsh environments, delivers stable regulation across -40°C to +125°C junction temperature, and integrates POK, VREF, and BIAS functionality for system-level monitoring and efficiency optimization.
Technical Context
The MPQ4569GN-P employs a current-mode PWM control scheme with zero-current detection (ZCD), enabling valley-switching and automatic frequency scaling under light load to minimize switching losses. Its internal 1V reference feeds the FB comparator, while the dedicated BIAS pin allows external biasing above 2.9V to improve efficiency by powering internal circuitry independently of VIN.
Thermal shutdown activates at 175°C with 20°C hysteresis, and UVLO features 4.2V rising / 3.75V falling thresholds with 0.45V hysteresis. The POK open-drain output asserts HIGH when VOUT exceeds 90% of nominal, with 40μs deglitch timing - all implemented without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports direct connection to automotive battery (12V/24V/48V systems) and industrial 48V DC distribution rails. |
| Output Current | 0.3A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in AEC-Q100-compliant modules. |
| FB Reference Accuracy | ±1% at 25°C, ±2% over full temperature - enables tight output regulation without trimming resistors in production. |
| Quiescent Current | 20μA active mode - minimizes standby drain in always-on vehicle subsystems like body control modules. |
| Shutdown Current | 5μA - ensures <10μA total system sleep current when paired with low-leakage external components. |
| Switching Frequency | Variable (light-load scaling) - reduces gate driver and switching losses below 10% load, improving light-load efficiency by >15% vs fixed-frequency designs. |
| Thermal Shutdown Threshold | 175°C with 20°C hysteresis - provides reliable fault recovery in enclosed automotive enclosures without external thermal management. |
Pinout & Package
MPQ4569GN-P uses the SOIC-8 EP package (3.9mm × 4.9mm × 1.7mm), featuring an exposed thermal pad for enhanced heat dissipation in high-temperature automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Power Ground | Primary return path for high-current switch node; must be connected directly to output capacitor ground plane to minimize EMI and voltage spikes. |
| 2 VIN | Input Supply | Accepts 4.5–75V input; requires local 10μF/100V ceramic decoupling capacitor placed within 2mm of pin to suppress switching transients. |
| 3 EN | Enable Input | Active-HIGH logic; 1.55V rising threshold; internally pulled down when floating - enables simple ignition-sense interface using resistor divider from battery. |
| 4 FB | Feedback Input | Compares output voltage (via external resistor divider) against internal 1V reference; tolerance directly determines output accuracy (±1% at 25°C). |
| 5 SS | Soft-Start Control | Accepts external capacitor to set startup ramp time; internal 5μA current source charges SS to prevent output overshoot during cold start or short-circuit recovery. |
| 6 BIAS | Bias Supply Input | Accepts 2.9–5.5V external bias (e.g., regulated 3.3V rail); bypasses VIN-dependent regulator to reduce quiescent loss and improve efficiency at low VIN. |
| 7 BST | Bootstrap Supply | Connects to SW via 0.1μF ceramic capacitor; powers high-side MOSFET gate driver; requires ≥2.4V BST–SW differential to enable HS_FET conduction. |
| 8 SW | Switch Node | Drives external inductor; carries pulsed high-current waveform; must be routed with minimal loop area and kept 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 ambient, meeting automotive reliability and stress-test requirements for engine bay and chassis-mounted modules. |
| Integrated 1.2Ω/0.45Ω MOSFETs | Eliminates external power switches and associated gate drivers, reducing BOM count by ≥4 components and PCB footprint by >30% vs discrete solutions. |
| Programmable soft-start via SS pin | Enables controlled inrush current limiting during power-up and fault recovery - critical for protecting downstream capacitors and avoiding bus droop in multi-rail systems. |
| Open-drain POK output | Provides system-level power-good signaling with 90% trip threshold and 40μs deglitch - allows safe sequencing of MCU, CAN, and sensor subsystems without external comparators. |
| BIAS pin for efficiency optimization | Reduces total input current by up to 30% at VIN = 12V when powered from regulated 3.3V, enabling higher overall system efficiency in multi-converter architectures. |
Applications
| Automotive Body Control Module (BCM) | Industrial 48V DC-DC Distribution |
|---|---|
|
Use Scenario: Powering microcontroller, LIN transceiver, and door-lock actuators from 12V battery with engine cranking dips down to 4.5V. IC Role / Device Role / Timing Role: Primary 3.3V/300mA point-of-load regulator with AEC-Q100 qualification and UVLO hysteresis to maintain operation during cold-crank events. Use Value: Maintains stable 3.3V supply across 4.5–16V input range, eliminating need for pre-regulator stage and reducing system cost by $0.42 per unit. |
Use Scenario: Generating isolated 5V rail for PLC I/O modules fed from unregulated 48V industrial bus with ±10% tolerance. IC Role / Device Role / Timing Role: Synchronous buck controller delivering 5V/300mA with adjustable feedback and POK signaling for system health monitoring. Use Value: Achieves >92% peak efficiency at 48V→5V conversion, reducing thermal load on enclosure and enabling fanless design in DIN-rail mounted enclosures. |
| Battery-Powered Telematics Unit | Automotive ADAS Camera Power Supply |
|
Use Scenario: Long-term parking mode where telematics module draws <10μA sleep current from 12V lead-acid battery for GPS wake-up and cellular reporting. IC Role / Device Role / Timing Role: Always-on buck regulator with 5μA shutdown current and 20μA quiescent draw - directly interfaces with battery without intermediate LDO. Use Value: Extends battery life from 3 months to >14 months in sleep mode, meeting OEM requirement for 1-year maintenance-free operation. |
Use Scenario: Powering image sensor and ISP in rear-view camera module mounted near exhaust, subject to ambient temperatures up to +105°C. IC Role / Device Role / Timing Role: High-temperature-rated 3.3V/300mA regulator with thermal shutdown at 175°C and SOIC-8 EP thermal pad for direct heatsink attachment. Use Value: Eliminates need for external thermal sensor and shutdown logic, simplifying design and passing ISO 16750-4 thermal cycling validation. |
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 |
|---|---|---|---|
| MPQ4569GQ-AEC1 | QFN-10 (3mm×3mm) package with VREF and POK pins; 120°C max ambient rating vs GN-P's 125°C; identical electrical specs. | Requires smaller PCB footprint and offers better thermal resistance (θJA = 50°C/W vs 48°C/W), but lacks exposed pad solderability verification for high-vibration environments. | Select GQ-AEC1 only when board space is constrained and vibration testing is not required; GN-P preferred for under-hood applications. |
| LM5164QPWPRQ1 | 4.5–65V input, 0.3A, 1.5MHz fixed-frequency; no integrated POK or VREF; requires external soft-start capacitor and compensation network. | Higher switching frequency enables smaller inductors but increases EMI filtering complexity; lacks AEC-Q100 Grade 1 thermal margin (rated to 125°C TJ only). | Choose LM5164QPWPRQ1 only if 1.5MHz operation is mandatory and system-level POK can be implemented externally; MPQ4569GN-P reduces design cycle time by 3 weeks. |
Compared with MPQ4569GQ-AEC1, the GN-P offers superior mechanical robustness in high-vibration zones due to SOIC-8 EP's larger solder joint area, while versus LM5164QPWPRQ1 it delivers faster time-to-market via integrated POK, VREF, and AEC-Q100 Grade 1 qualification without external compensation.
Availability
MPQ4569GN-P is available at Aetrix Electronics and suitable for automotive body control modules, industrial 48V DC-DC distribution systems, and battery-powered telematics units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MPQ4569GN-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 over 20 years of expertise in DC-DC conversion, motor drivers, and LED lighting controllers.
The MPQ4569 product line targets automotive-grade power management, specifically engineered for AEC-Q100 compliance, wide-input operation, and thermal resilience in engine compartment and chassis-mounted electronics.
FAQ
What is the maximum allowable input voltage for MPQ4569GN-P?
The absolute maximum input voltage is +80V, but the recommended operating range is 4.5V to 75V. Operation above 75V risks exceeding the internal MOSFET breakdown voltage and triggering UVLO protection. Sustained operation at 75V requires derating output current to 250mA to maintain junction temperature below 125°C with standard PCB copper area.
Can MPQ4569GN-P operate without connecting the BIAS pin?
Yes - the BIAS pin is optional. When left unconnected, the internal 2.6V regulator derives power from VIN and operates across the full 4.5–75V range. However, connecting BIAS to a stable 3.3V or 5V rail reduces quiescent current by ~30% and improves efficiency, especially at low VIN (e.g., 6V cranking conditions).
How does the POK output behave during startup and fault conditions?
POK remains LOW until VOUT reaches 90% of its nominal value and stays stable for ≥40μs. During startup, POK asserts HIGH only after soft-start completes and regulation is established. In shutdown, thermal fault, or UVLO, POK is actively pulled LOW. It does not assert during transient undershoots shorter than 40μs.
What is the minimum inductor value supported for MPQ4569GN-P at 75V input?
At VIN = 75V, the minimum inductor is calculated using LMIN = (VIN(MAX) × tON(MIN)) / IPEAK, where tON(MIN) = 120ns and IPEAK = 720mA (typ). This yields LMIN ≈ 12.5μH. Using <12.5μH risks subharmonic oscillation and loss of current-mode control stability.
Is the MPQ4569GN-P RoHS-compliant and lead-free?
Yes - MPQ4569GN-P is fully RoHS-compliant and lead-free, with matte tin (Sn) plating on all terminals. It meets JEDEC J-STD-020D moisture sensitivity level 3 (MSL3) and is qualified for reflow soldering per IPC/JEDEC J-STD-020.
Does MPQ4569GN-P require external compensation components?
No - MPQ4569GN-P uses internal compensation and requires no external RC networks. The current-mode architecture with ZCD eliminates the need for loop compensation, reducing design risk and enabling single-layer PCB layouts for cost-sensitive automotive modules.
What is the purpose of the feedforward capacitor (CFF) between VOUT and FB?
The 39pF feedforward capacitor (CFF) mitigates switching frequency jitter caused by noise on the FB pin. It stabilizes the PWM on-time decision point by coupling output ripple into the feedback node, preventing false turn-on of the high-side MOSFET during low-noise, low-ripple conditions.
MPQ4569GN-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MPQ4569GN-P FAQ
1.How can I place an order for MPQ4569GN-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4569GN-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 MPQ4569GN-P reliable?
The price and inventory of MPQ4569GN-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4569GN-P is usually 5 days.
3.What payment methods are accepted for MPQ4569GN-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4569GN-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4569GN-P?
MPQ4569GN-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4569GN-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 MPQ4569GN-P?
For technical support, including MPQ4569GN-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4569GN-P requirements.
6.How does Aetrix verify that MPQ4569GN-P is sourced from the original manufacturer or authorized distributors?
All MPQ4569GN-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 MPQ4569GN-P meets industry standards.
7.What is the process for return or replacement of MPQ4569GN-P?
All MPQ4569GN-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4569GN-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 MPQ4569GN-P part is unused and in its original packaging.
Return procedure for MPQ4569GN-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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