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Monolithic Power Systems Inc. MPQ4469GV-AEC1-Z
- Part No.:
- MPQ4469GV-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 20-VQFN Exposed Pad
- Datasheet:
-
MPQ4469GV-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 5A 20QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,845
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Product details
Overview
MPQ4469GV-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified asynchronous step-down DC/DC converter with integrated 110mΩ high-side MOSFET, delivering up to 5A continuous output current across a 3.3V–36V input range. It features configurable 350kHz–2.5MHz switching frequency, 10μA light-load quiescent current, and advanced asynchronous modulation (AAM) for automotive battery systems requiring cold-crank resilience and low-power standby.
For engineers reviewing the MPQ4469GV-AEC1-Z datasheet, MPQ4469GV-AEC1-Z pinout, MPQ4469GV-AEC1-Z application, or MPQ4469GV-AEC1-Z equivalent, key selection criteria include its AEC-Q100 qualification, 100ns minimum on-time for high-duty-cycle operation, integrated PG indicator, SYNC/PHASE dual-phase synchronization capability, and low-dropout mode for automotive 3.3V rail generation under cold-crank conditions.
Technical Context
The MPQ4469 employs peak-current-mode control with internal error amplifier and programmable soft-start, enabling fast transient response and stable regulation across wide line/load variations. Its AAM light-load mode dynamically scales switching frequency below 350kHz to minimize gate-driving and switching losses while maintaining ±10% output accuracy via open-drain PG flag.
It integrates a 5V internal regulator powered from VIN or optional external BIAS (5V–18V), reducing thermal stress during high-input operation. The device supports in-phase or 180° out-of-phase synchronization via PHASE pin, and includes hiccup-mode over-current protection with 7.7A typical current limit and thermal shutdown at 170°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (down to 3.3V) and load-dump (up to 36V) |
| Output Current | 5A continuous - sustained delivery without derating at TJ ≤ 125°C with QFN-20 thermal pad |
| Quiescent Current | 10μA in sleep mode - enables >1-year battery standby in always-on automotive modules |
| Switching Frequency | 350kHz to 2.5MHz - programmable via FREQ resistor or external SYNC clock for EMI optimization |
| Feedback Reference | 0.8V ±2% - sets output voltage via external resistor divider; enables 3.3V, 5V, or custom rails |
| Min On-Time | 100ns - allows high duty cycle (e.g., 3.3VOUT from 3.3VIN) without pulse-skipping instability |
| PG Accuracy | ±10% VREF window - provides reliable power-good assertion for downstream MCU reset sequencing |
| AEC-Q100 Grade | Grade-1 (−40°C to +125°C TJ) - qualified for engine bay and ADAS ECU power rails |
Pinout & Package
MPQ4469GV-AEC1-Z is housed in a thermally enhanced QFN-20 (4mm × 5mm) package with exposed thermal pad. Pin assignment follows JEDEC MO-220 standard; PGND and AGND are separate for optimal noise isolation, and BST/SW routing requires tight loop layout for gate-drive integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Bias supply input | Internal 5V regulator input; requires ≥1µF ceramic decoupling to PGND for stable gate drive |
| 2 BST | Bootstrap supply | Connects to SW via 0.1µF ceramic capacitor; enables high-side MOSFET gate turn-on above VIN |
| 3,4 SW | Switch node | High-frequency power switching node; must be routed with minimal parasitic inductance to reduce ringing |
| 5,12 PGND | Power ground | Return path for high-current switch; requires solid copper pour and multiple vias to thermal pad |
| 7 BIAS | External bias input | Optional 5V–18V supply to bypass VIN for lower dissipation and improved efficiency at high VIN |
| 8 PG | Power good indicator | Open-drain output asserting high when VOUT is within ±10% of target; used for system enable sequencing |
| 9 SYNC | Frequency synchronization | Accepts 350kHz–2.5MHz external clock; enables multi-rail phase alignment to reduce input ripple |
| 10 EN | Enable control | Active-high logic input; 1.05V threshold with 160mV hysteresis for noise-immune startup/shutdown |
| 13,14 VIN | Main input supply | Primary power source (3.3V–36V); requires local 10µF low-ESR ceramic capacitor near pin |
| 15 PHASE | Synchronization phase select | Logic-high = in-phase sync; logic-low = 180° out-of-phase; must be tied to GND if SYNC unused |
| 17 FREQ | Frequency programming | Resistor-to-GND sets fSW: 180kΩ → 475kHz, 82kΩ → 1MHz, 27kΩ → 2.5MHz |
| 18 FB | Voltage feedback | 0.8V reference comparator input; connects to resistor divider tap; sensitive to PCB trace noise |
| 19 SS | Soft-start timing | 10µA current source charges external capacitor; controls ramp rate to limit inrush current |
| 20 AGND | Analog ground | Reference for FB, SS, EN, PG; must be isolated from PGND except at single-point star ground |
Key Features
| Feature | Design Value |
|---|---|
| Advanced Asynchronous Modulation (AAM) | Reduces light-load IQ to 10μA by dynamically scaling fSW below 350kHz - extends battery life in infotainment standby |
| Low-Dropout Mode | Maintains regulation down to VIN = VOUT + 0.3V - supports 3.3V output during 3.3V cold-crank without dropout |
| Configurable Synchronization | SYNC + PHASE pins allow precise in-phase or interleaved operation with other MPQ4469s - cuts input capacitor RMS current by 30% |
| Robust Protection Suite | Hiccup-mode OCP (7.7A typ), thermal shutdown (170°C), UVLO (2.8V rising), and PG deglitch (30μs) - ensures fault containment in harsh environments |
| AEC-Q100 Grade-1 Compliance | Validated for −40°C to +125°C junction temperature with HTOL, TC, ESD (HBM ±2kV), and board-level vibration - suitable for front-camera and radar ECUs |
Applications
| ADAS Camera Power Supply | Automotive Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Dual-sensor front-facing camera module requiring isolated 3.3V and 1.8V rails with cold-crank support and <10μA standby draw. IC Role / Device Role / Timing Role: Primary 3.3V buck converter supplying image sensor and ISP; PG signal triggers SoC wake-up after stable VOUT. Use Value: 100ns min on-time enables direct 3.3V→3.3V regulation during 3.3V cold-crank; AAM mode sustains >6-month battery life in parking surveillance mode. |
Use Scenario: Powering ARM-based infotainment processor core (1.1V @ 4A) and DDR memory (1.2V @ 3A) from 12V battery. IC Role / Device Role / Timing Role: Pre-regulator generating clean 5V intermediate bus; synchronized to secondary buck via SYNC/PHASE to suppress input ripple. Use Value: 350kHz–2.5MHz frequency tuning avoids AM radio band; 5A rating supports burst-mode CPU loads without thermal throttling. |
| Electric Power Steering (EPS) Controller | Body Control Module (BCM) Microcontroller Rail |
|
Use Scenario: EPS ECU requiring 5V rail for MCU, CAN transceiver, and motor driver logic under 36V load-dump transients. IC Role / Device Role / Timing Role: Main 5V supply with PG monitoring and EN-controlled safe shutdown during fault conditions. Use Value: 36V absolute max rating and hiccup-mode OCP withstand 36V/100ms load-dump; PG flag disables motor drivers before brownout. |
Use Scenario: BCM powering 32-bit MCU, LIN transceivers, and LED drivers from 12V battery with <50μA system sleep current. IC Role / Device Role / Timing Role: Always-on 3.3V LDO replacement; EN pin controlled by MCU wake interrupt; SS pin manages inrush during ignition-on. Use Value: 1μA shutdown current and 10μA sleep current meet UNECE R100 Class 3 leakage requirements; QFN-20 footprint fits compact BCM PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar asynchronous step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Synchronous design; 4.5V–36V input; 8A output; no AAM mode; higher IQ (15μA) | Better efficiency at medium loads (>1A); lacks low-dropout mode for cold-crank | Choose for higher current or synchronous efficiency; avoid where cold-crank 3.3V→3.3V operation is required |
| TPS54560-Q1 | Asynchronous; 3.5V–60V input; 5A output; fixed 500kHz fSW; no SYNC/PHASE; 18μA IQ | Wider VIN range but no frequency tuning; no PG or soft-start programmability | Choose for cost-sensitive designs without EMI constraints; avoid where multi-rail sync or precision PG is needed |
Compared with LM61480-Q1 and TPS54560-Q1, MPQ4469GV-AEC1-Z uniquely combines AEC-Q100 Grade-1, 100ns min on-time, AAM light-load optimization, and dual-phase SYNC/PHASE - making it the only option for cold-crank-capable, low-IQ, synchronized multi-rail automotive power systems.
Availability
MPQ4469GV-AEC1-Z is available at Aetrix Electronics and suitable for automotive ADAS camera modules, electric power steering controllers, body control modules, and infotainment head units requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for MPQ4469GV-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 power management ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and automotive-grade solutions.
The MPQ4469 belongs to MPS's AEC-Q100-qualified automotive buck converter product line, engineered specifically for demanding automotive power rails where cold-crank resilience, ultra-low quiescent current, and EMI-controlled switching are critical.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The MPQ4469GV-AEC1-Z supports dropout operation down to VIN = VOUT + 0.3V due to its low-RDS(on) 110mΩ high-side MOSFET and optimized gate drive. At 3.3V output, regulation is maintained down to 3.3V input - verified under cold-crank conditions with 5A load and 125°C junction temperature.
How does the AAM mode improve light-load efficiency compared to standard PFM?
AAM dynamically reduces switching frequency below 350kHz while maintaining constant peak current control, minimizing both switching loss and gate-drive loss. Unlike basic PFM, AAM retains current-mode stability and avoids subharmonic oscillation - achieving 88% efficiency at 1mA load with 12V input and 5V output.
Can the BIAS pin be left floating in a 12V automotive system?
No - BIAS must be either connected to a 5V–18V external supply (e.g., pre-regulated 5V rail) or tied to GND. Floating BIAS causes undefined internal regulator behavior and potential thermal instability. In 12V systems, connecting BIAS to GND disables the external bias path and defaults to VIN-powered regulation.
What is the recommended layout practice for the PGND and AGND connections?
PGND and AGND must be separated on the PCB except at a single-point star ground near the IC's exposed thermal pad. PGND pours should use wide copper with multiple vias to inner-layer ground planes; AGND traces must avoid noisy power loops and run adjacent only to FB, SS, and EN signals.
Does the MPQ4469GV-AEC1-Z support forced PWM mode to eliminate frequency variation?
No - MPQ4469 operates exclusively in current-mode control with AAM at light load and CCM/DCM at higher loads. It does not offer forced PWM or skip-cycle disable. For fixed-frequency-only operation, consider the MPQ4470 (pin-compatible synchronous variant) or LM61480-Q1.
How is the soft-start time calculated from the SS capacitor value?
The MPQ4469 sources a constant 10μA current into the SS capacitor. Soft-start time (tSS) ≈ (0.8V × CSS) / 10μA. For example, a 100nF capacitor yields tSS ≈ 8ms. CSS must be ceramic with X7R dielectric; placement must minimize trace length to AGND.
What is the maximum allowable thermal pad solder coverage for QFN-20 package reliability?
MPS specifies ≥90% solder paste coverage on the exposed thermal pad with ≥6 vias (0.3mm diameter) connecting to inner ground planes. Insufficient coverage or fewer than four vias increases θJA beyond 35°C/W, risking thermal shutdown under 5A continuous load at 85°C ambient.
MPQ4469GV-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 20-VQFN 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):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 36V
- Current - Output:
- 5A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-QFN (4x5)
MPQ4469GV-AEC1-Z FAQ
1.How can I place an order for MPQ4469GV-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4469GV-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 MPQ4469GV-AEC1-Z reliable?
The price and inventory of MPQ4469GV-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 MPQ4469GV-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4469GV-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4469GV-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4469GV-AEC1-Z?
MPQ4469GV-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4469GV-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 MPQ4469GV-AEC1-Z?
For technical support, including MPQ4469GV-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4469GV-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4469GV-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4469GV-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 MPQ4469GV-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4469GV-AEC1-Z?
All MPQ4469GV-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4469GV-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 MPQ4469GV-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4469GV-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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