My Inquiry
My Account
Monolithic Power Systems Inc. MPQ4569GQ-Z
- Part No.:
- MPQ4569GQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ4569GQ-Z.pdf
- Description:
- IC REG BUCK ADJ 300MA 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,248
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ4569GQ-Z from Monolithic Power Systems is a 75V, 0.3A AEC-Q100 Grade 1 qualified synchronous step-down converter with integrated high-side (1.2Ω) and low-side (0.45Ω) MOSFETs, 1V reference accuracy (±1% at 25°C), programmable soft-start, and 5μA shutdown current - designed for automotive front-end power conversion in 12V/24V/48V battery systems.
For engineers reviewing the MPQ4569GQ-Z datasheet, MPQ4569GQ-Z pinout, MPQ4569GQ-Z application, or MPQ4569GQ-Z equivalent, this device supports precise output regulation (1V FB reference), wide-input operation (4.5–75V), thermal shutdown protection, POK monitoring, and QFN-10 package thermal performance - critical for automotive ECU, ADAS camera modules, and industrial battery-powered controllers.
Technical Context
The MPQ4569GQ-Z employs a current-mode PWM control scheme with zero-current detection (ZCD) and precision 1V internal reference to regulate output voltage via external resistive divider. Its adaptive frequency scaling under light load reduces switching losses while maintaining stability across input transients.
It integrates a dedicated BIAS pin that accepts 2.9–5.5V external supply 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 setpoint, with 5% hysteresis and 40μs deglitch timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports direct connection to automotive battery rails including cold-crank (4.5V) and load-dump (75V) events. |
| Output Current | 0.3A continuous - sufficient for powering microcontrollers, sensors, and CAN transceivers in compact automotive modules. |
| Feedback Reference | 1.0V ±1% at 25°C - enables accurate output setting (e.g., 3.3V with 1200kΩ/523kΩ divider) with minimal drift over temperature. |
| Quiescent Current | 20μA active mode - preserves battery life in always-on vehicle subsystems like telematics and alarm controllers. |
| Shutdown Current | 5μA - ensures ultra-low leakage during vehicle sleep mode without compromising wake-up responsiveness. |
| Thermal Shutdown | 175°C with 20°C hysteresis - provides robust fault recovery in enclosed engine-bay environments. |
| Switching Frequency | Adaptive (not fixed) - scales down under light load to reduce gate and switching losses, improving partial-load efficiency. |
Pinout & Package
MPQ4569GQ-Z is housed in a thermally enhanced QFN-10 (3mm × 3mm) package with exposed thermal pad, optimized for high-power density and PCB-level heat dissipation in space-constrained automotive modules.
| 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 for thermal and EMI integrity. |
| 2 VIN | Input Supply | High-voltage DC input (4.5–75V); requires local 10μF/100V ceramic decoupling to suppress switching noise. |
| 3 EN | Enable Control | Active-HIGH logic input with 1.55V rising threshold; floating defaults to disable; supports external UVLO adjustment via resistor divider. |
| 4 VREF | Reference Output | Stable 1V output with 500μA sourcing capability - used as feedback reference or external bias source for auxiliary circuits. |
| 5 FB | Feedback Input | Compares divided output voltage against internal 1V reference; tolerance ±1% at 25°C ensures tight output regulation. |
| 6 SS | Soft-Start Control | Accepts external capacitor to linearly ramp reference during startup, preventing output overshoot and inrush current. |
| 7 POK | Power Good Output | Open-drain signal asserting HIGH when VOUT ≥ 90% of target - used for system power sequencing and fault reporting. |
| 8 BIAS | Bias Supply Input | Accepts 2.9–5.5V external supply to power internal regulator and LS-FET driver, reducing VIN current and boosting efficiency. |
| 9 BST | Bootstrap Supply | Charges high-side gate driver via external BST–SW capacitor; requires low-ESR ceramic cap (e.g., 0.1μF) placed adjacent to pins. |
| 10 SW | Switch Node | Drives external inductor; carries high di/dt current - must be routed short and away from analog traces (FB, SS, POK) to avoid coupling. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for operation from –40°C to +125°C junction temperature - meets automotive reliability requirements for engine control and ADAS. |
| Integrated 1.2Ω/0.45Ω MOSFETs | Eliminates external power switches and associated gate drive complexity while minimizing conduction loss in high-voltage step-down. |
| Programmable soft-start | External capacitor sets ramp time - prevents output overshoot and limits inrush into downstream capacitors during cold-start. |
| VREF pin (1V, 500μA) | Provides stable, low-noise reference for auxiliary circuits or secondary regulators - avoids need for external reference IC. |
| POK with 40μs deglitch | Ensures reliable power-good assertion only after sustained regulation - prevents false triggers during transient load steps or line dips. |
Applications
| Automotive Engine Control Unit (ECU) | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powers MCU, CAN transceiver, and sensor interface in under-hood ECU exposed to 12V battery with load-dump spikes up to 75V. IC Role / Device Role / Timing Role: Primary 3.3V/0.3A buck converter delivering regulated supply with AEC-Q100 compliance and thermal fault resilience. Use Value: Enables single-chip solution replacing discrete FET + controller designs, reducing BOM count and PCB area by >30%. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view camera modules requiring low-noise, always-on 3.3V rail. IC Role / Device Role / Timing Role: High-efficiency step-down regulator with 20μA quiescent current and POK signaling for system-level power sequencing. Use Value: Maintains camera readiness during vehicle sleep mode while enabling fast wake-up via EN pin control and soft-start stability. |
| Industrial Battery-Powered Telematics | Railway Onboard Controller |
|
Use Scenario: Converts 24V/48V train or fleet battery to 3.3V for GPS/GSM module, supporting extended runtime and cold-crank operation. IC Role / Device Role / Timing Role: Wide-input buck converter with 5μA shutdown current and adaptive frequency scaling for optimal partial-load efficiency. Use Value: Extends battery life by >40% vs. fixed-frequency alternatives during idle telemetry transmission cycles. |
Use Scenario: Provides isolated 5V/3.3V supply for safety-critical onboard PLCs operating in harsh railway environments with wide temperature swings. IC Role / Device Role / Timing Role: AEC-Q100-compliant DC-DC stage delivering fault-tolerant output with thermal shutdown and POK status reporting. Use Value: Meets EN 50155 thermal and reliability requirements without external thermal management components. |
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 |
|---|---|---|---|
| MPQ4570GQ-Z | Higher 0.5A output current; identical 4.5–75V input range and AEC-Q100 Grade 1 rating; same QFN-10 package and pinout. | Supports higher-power loads (e.g., multi-sensor fusion units) but draws slightly higher quiescent current (25μA vs. 20μA). | Select when >0.3A output is required and board layout allows same footprint; no redesign needed beyond inductor/capacitor derating. |
| LM61480QRNTRQ1 | TI's 75V, 0.5A AEC-Q100 buck; fixed 2.1MHz frequency; no VREF pin; uses different enable threshold (1.2V) and lacks POK output. | Suitable for noise-sensitive applications needing constant frequency, but lacks power-good signaling and reference output for auxiliary use. | Choose when EMI filtering is prioritized over flexibility; requires redesign of feedback network and sequencing logic due to missing POK/VREF. |
Compared with MPQ4569GQ-Z, MPQ4570GQ-Z offers headroom for future load growth without layout change, while LM61480QRNTRQ1 trades feature richness for deterministic EMI behavior - making MPQ4569GQ-Z optimal for cost-sensitive, functionally dense automotive modules needing POK, VREF, and ultra-low IQ.
Availability
MPQ4569GQ-Z is available at Aetrix Electronics and suitable for automotive ECU power supplies, ADAS camera modules, and industrial battery-powered telematics requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for MPQ4569GQ-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 across Asia and North America and global distribution.
The MPQ4569 belongs to MPS's automotive-grade DC-DC converter product line, engineered specifically for robust, high-voltage step-down regulation in demanding automotive and industrial environments where reliability, thermal resilience, and AEC-Q100 compliance are mandatory.
FAQ
What is the maximum recommended input voltage for continuous operation?
The MPQ4569GQ-Z supports continuous operation up to 75V input, with absolute maximum rating of +80V on VIN. It is rated for automotive load-dump conditions per ISO 7637-2 Pulse 5a, making it suitable for 24V and 48V commercial vehicle systems without external clamping.
Does the MPQ4569GQ-Z require an external bootstrap capacitor?
Yes - a 0.1μF ceramic capacitor must be placed between BST and SW pins to supply gate drive voltage for the integrated high-side MOSFET. This capacitor is charged during low-side conduction and must be located within 2mm of the pins to minimize loop inductance and prevent bootstrap failure.
Can the BIAS pin be left unconnected?
No - BIAS must be connected either to the regulated output (if 2.9–5.5V) or to an external bias supply ≥2.9V. Leaving it floating disables internal regulator override and forces operation from VIN, reducing efficiency and increasing thermal stress at high input voltages.
How is output voltage adjusted, and what is the minimum feedback resistor value?
Output voltage is set using a resistive divider from VOUT to FB, referenced to the internal 1V. For 3.3V output, typical values are R4 = 1200kΩ and R5 = 523kΩ. Feedback resistors should be ≥100kΩ to limit no-load current; values in the megohm range are preferred to minimize quiescent loss.
Is the POK signal compatible with 3.3V logic systems?
Yes - POK is an open-drain output with 0.4V max VOL at 1mA sink current. When pulled up to 3.3V, it delivers clean HIGH/LOW logic levels compatible with standard CMOS inputs, enabling direct interfacing with microcontroller GPIOs for power-status monitoring.
What thermal performance can be expected in a 4-layer PCB layout?
On a standard 4-layer JEDEC PCB (2oz copper, 1in² thermal pad exposure), the QFN-10 package achieves θJA = 50°C/W. At 0.3A output and 24V input, typical junction-to-ambient rise is ~35°C - well below the 125°C max operating temperature, even at +85°C ambient.
Does the MPQ4569GQ-Z support parallel operation for higher current?
No - the MPQ4569GQ-Z does not include current-sharing or synchronization features. It is designed as a single-channel solution. For >0.3A, select MPQ4570GQ-Z or use external current-sharing controllers; paralleling multiple MPQ4569GQ-Z units is not supported and may cause instability.
MPQ4569GQ-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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MPQ4569GQ-Z FAQ
1.How can I place an order for MPQ4569GQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4569GQ-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-Z reliable?
The price and inventory of MPQ4569GQ-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-Z is usually 5 days.
3.What payment methods are accepted for MPQ4569GQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4569GQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4569GQ-Z?
MPQ4569GQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4569GQ-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-Z?
For technical support, including MPQ4569GQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4569GQ-Z requirements.
6.How does Aetrix verify that MPQ4569GQ-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4569GQ-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-Z meets industry standards.
7.What is the process for return or replacement of MPQ4569GQ-Z?
All MPQ4569GQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4569GQ-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-Z part is unused and in its original packaging.
Return procedure for MPQ4569GQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ4569GQ-Z Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
