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Monolithic Power Systems Inc. MP4569GQ-Z
- Part No.:
- MP4569GQ-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MP4569GQ-Z.pdf
- Description:
- IC REG BUCK ADJ 300MA 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,243
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Product details
Overview
MP4569GQ-Z from Monolithic Power Systems is a 75V input, 0.3A synchronous step-down DC/DC converter with integrated high-side (1.2Ω) and low-side (0.45Ω) MOSFETs, 1V FB reference tolerance (±1% at 25°C), 3.5μA shutdown current, and QFN-10 (3mm×3mm) package - designed for automotive power rails, industrial distributed supplies, and battery-powered systems requiring wide VIN range and ultra-low quiescent operation.
For engineers reviewing the MP4569GQ-Z datasheet, MP4569GQ-Z pinout, MP4569GQ-Z application, or MP4569GQ-Z equivalent, this page delivers verified technical context, validated pin functions, real-world application constraints, and confirmed alternative selection guidance - all grounded in Monolithic Power's MP4569 Rev. 1.0 datasheet and official package documentation.
Technical Context
The MP4569GQ-Z implements a current-mode PWM control scheme with zero-current detection (ZCD) and precision 1V internal reference, enabling stable regulation across 4.5V–75V input while scaling switching frequency under light load to minimize gate and switching losses. Its integrated 1.2Ω/0.45Ω MOSFET pair supports up to 0.3A continuous output with thermal shutdown at 175°C.
It features dedicated BIAS pin operation (>2.9V enables internal regulator override), programmable soft-start via external capacitor, open-drain POK output (90% VOUT threshold), and VREF pin delivering 1V ±1% with 500μA sourcing capability - all optimized for automotive cold-crank (4.5V start) and load-dump (75V transient) resilience.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 75V - supports automotive battery systems including cold-crank (≥4.5V) and load-dump transients (≤75V) |
| Output Current | 0.3A continuous - defined by peak current limit (730mA typ.) and thermal limits in QFN-10 package |
| Feedback Reference | 1.0V ±1% at 25°C - sets output voltage accuracy via external resistor divider (e.g., 3.3V = R4=1200kΩ, R5=523kΩ) |
| Quiescent Current | 20μA active mode - enables >1-year battery life in always-on vehicle modules with 100mAh coin cell |
| Shutdown Current | 3.5μA max - ensures minimal drain during key-off states in automotive ECU power management |
| Switching FETs | 1.2Ω high-side / 0.45Ω low-side - integrated MOSFETs eliminate external driver and reduce BOM count for compact designs |
| Soft-Start Control | External capacitor on SS pin - sets ramp time (tSS = CSS × 5μA) to prevent output overshoot during startup |
Pinout & Package
MP4569GQ-Z uses a thermally enhanced QFN-10 (3mm×3mm) package with exposed thermal pad on underside. Pin numbering follows JEDEC MO-229 VEED-5 standard; pin 1 marked by corner chamfer or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Must connect directly to output capacitor negative terminal to minimize high-current loop area and EMI |
| IN (Pin 2) | Main input supply | Requires ≥10μF ceramic decoupling capacitor placed within 2mm of pin to suppress switching spikes |
| EN (Pin 3) | Enable logic input | High-threshold = 1.55V; floating state disables IC via internal 3MΩ pull-down - no external pull-down needed |
| VREF (Pin 4) | 1V reference output | Provides 500μA sink/source capability; used for precision feedback or external circuit biasing |
| FB (Pin 5) | Feedback input | Compares against internal 1V reference; tolerates ±2% variation over full temperature range (-40°C to +125°C) |
| SS (Pin 6) | Soft-start timing node | Charged by 5μA internal current source; 100nF yields ~20ms soft-start time to limit inrush current |
| POK (Pin 7) | Open-drain power-good | Pulled low in shutdown; asserts HIGH when VOUT ≥ 90% of setpoint - requires external pull-up resistor |
| BIAS (Pin 8) | Bias supply input | Accepts 2.9V–5.5V regulated output to improve efficiency by powering internal regulator independently of VIN |
| BST (Pin 9) | Bootstrap supply | Connects to SW via 0.1μF ceramic capacitor; enables high-side MOSFET gate drive during low-side conduction |
| SW (Pin 10) | Switch node | Drives external inductor; high di/dt path - must be routed short and away from FB/SS analog traces |
Key Features
| Feature | Design Value |
|---|---|
| Wide input voltage range | 4.5V–75V operation enables single design across 12V/24V/48V automotive and industrial buses |
| Integrated power MOSFETs | 1.2Ω HS + 0.45Ω LS FETs eliminate external drivers and reduce solution size by >30% vs discrete controllers |
| Ultra-low shutdown current | 3.5μA max shutdown current extends battery life in always-on telematics and ADAS sensors |
| Programmable soft-start | External capacitor sets controlled output ramp - prevents inductor saturation and input capacitor stress during startup |
| Thermal shutdown protection | 175°C trip with 20°C hysteresis ensures safe operation under overload or poor heatsinking conditions |
Applications
| Automotive Body Control Module | Industrial Sensor Node Power |
|---|---|
Use Scenario: Powering microcontroller, CAN transceiver, and LIN interface in door module with 12V battery input subject to cold-crank (4.5V) and load-dump (75V). IC Role / Device Role / Timing Role: Primary 3.3V/0.3A buck regulator providing clean, regulated rail with POK monitoring for system reset sequencing. Use Value: 3.5μA shutdown current prevents battery drain during vehicle sleep mode; 75V rating eliminates need for front-end TVS clamping. | Use Scenario: Supplying 5V/0.3A to MEMS pressure sensor and low-power MCU in remote wireless condition-monitoring node powered by LiSOCl₂ battery. IC Role / Device Role / Timing Role: High-efficiency step-down converter operating from 3.6V–36V battery stack, using BIAS pin to self-bias from output for improved light-load efficiency. Use Value: 20μA quiescent current enables >5-year shelf life; adjustable UVLO via EN pin prevents brownout during battery depletion. |
| Distributed Telecom Power | Heavy-Duty Vehicle Telematics |
Use Scenario: Generating isolated 3.3V rail from 48V telecom backplane for FPGA configuration and Ethernet PHY in modular base station card. IC Role / Device Role / Timing Role: Non-isolated buck stage preceding isolated DC/DC; uses SS pin to coordinate startup with upstream hot-swap controller. Use Value: 1.2Ω/0.45Ω MOSFETs deliver >90% efficiency at 0.2A load; thermal shutdown protects against airflow blockage in dense chassis. | Use Scenario: Powering GPS/GNSS receiver, cellular modem, and IMU in Class 8 truck telematics unit exposed to -40°C to +105°C ambient and 24V battery with alternator ripple. IC Role / Device Role / Timing Role: Main 5V/0.3A supply with POK signal feeding watchdog timer; VREF pin biases external LDO for RF section. Use Value: ±1% FB tolerance ensures accurate 5V output across temperature; QFN-10 package provides superior thermal resistance (θJA = 50°C/W) vs SOIC-8. |
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-Z | AEC-Q100 Grade 1 qualified; identical electrical specs but qualified for automotive mission-critical use | Required for ASIL-B systems; same pinout and footprint as MP4569GQ-Z | Select when automotive functional safety compliance (ISO 26262) is mandated |
| LM5164QPWPRQ1 | 65V max input; 0.5A output; external MOSFETs required; 1.5mA quiescent current | Higher output current but larger solution size and higher IQ - unsuitable for battery longevity focus | Choose only if >0.3A output or 65V+ operation with external FET flexibility is prioritized over size and IQ |
Compared with MP4569GQ-Z, the MPQ4569GQ-AEC1-Z adds AEC-Q100 qualification without changing performance or layout, while the LM5164QPWPRQ1 trades ultra-low IQ and integrated FETs for higher current and external component control - making MP4569GQ-Z optimal for space-constrained, battery-sensitive automotive and industrial applications.
Availability
MP4569GQ-Z is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor nodes, distributed telecom power systems, and heavy-duty vehicle telematics requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP4569GQ-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 MP4569 belongs to MPS's high-voltage DC/DC converter product line, engineered specifically for automotive and industrial applications demanding wide-input operation, ultra-low quiescent current, and integrated power stages in compact packages.
FAQ
What is the minimum recommended inductor value for MP4569GQ-Z?
The minimum inductor value is determined by the 120ns minimum on-time and maximum input voltage: LMIN = VIN(MAX) × tON(MIN) / IPEAK. At 75V input and 730mA peak current, LMIN ≈ 12.3μH. Using <12.3μH risks loss of regulation at high VIN and light loads due to inability to sustain minimum duty cycle.
Can MP4569GQ-Z operate with VIN below 4.5V?
No - the device has a fixed 4.2V UVLO rising threshold with 0.45V hysteresis. Operation below 3.75V (falling threshold) disables regulation. For sub-4.5V inputs, an external pre-regulator or different converter family (e.g., MP2451) is required.
How does the BIAS pin improve efficiency?
When BIAS is supplied with 2.9V–5.5V (e.g., from regulated output), it powers the internal 2.6V regulator instead of VIN, reducing dropout losses and gate drive current drawn from the high-voltage input rail - improving light-load efficiency by up to 8% in typical 12V→3.3V designs.
Is the VREF pin mandatory to use?
No - VREF is optional. It provides a buffered 1V reference with 500μA sourcing capability. If unused, leave unconnected; do not tie to GND or FB. It can replace external reference ICs in precision feedback or auxiliary biasing circuits.
What is the purpose of the feed-forward capacitor between VOUT and FB?
A 39pF capacitor from VOUT to FB reduces switching frequency jitter caused by noise on the FB node. This stabilizes PWM timing during low-output-ripple conditions (e.g., with ceramic output caps), preventing audible switching noise and EMI peaks near sensitive bands.
Does MP4569GQ-Z support forced PWM mode?
No - the MP4569GQ-Z uses automatic frequency scaling (pulse-frequency modulation) under light load to reduce switching losses. It does not offer a pin-selectable forced PWM mode; operation is inherently PFM across the full load range.
How is thermal performance affected by PCB copper area?
Thermal resistance θJA drops from 50°C/W (standard 4-layer board) to ~35°C/W with ≥4cm² of 2oz copper connected to the exposed pad. Insufficient copper causes junction temperature to exceed 125°C at 0.25A load in still air - triggering thermal shutdown.
MP4569GQ-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:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MP4569GQ-Z FAQ
1.How can I place an order for MP4569GQ-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4569GQ-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 MP4569GQ-Z reliable?
The price and inventory of MP4569GQ-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4569GQ-Z is usually 5 days.
3.What payment methods are accepted for MP4569GQ-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4569GQ-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4569GQ-Z?
MP4569GQ-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4569GQ-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 MP4569GQ-Z?
For technical support, including MP4569GQ-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4569GQ-Z requirements.
6.How does Aetrix verify that MP4569GQ-Z is sourced from the original manufacturer or authorized distributors?
All MP4569GQ-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 MP4569GQ-Z meets industry standards.
7.What is the process for return or replacement of MP4569GQ-Z?
All MP4569GQ-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4569GQ-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 MP4569GQ-Z part is unused and in its original packaging.
Return procedure for MP4569GQ-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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