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Monolithic Power Systems Inc. MPQ4468GL-AEC1-Z
- Part No.:
- MPQ4468GL-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-PowerVQFN
- Datasheet:
-
MPQ4468GL-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,027
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Product details
Overview
MPQ4468GL-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, asynchronous step-down DC/DC converter with integrated 90mΩ high-side MOSFET, delivering up to 3.5A continuous output current across a 3.3V–36V input range. It features programmable switching frequency (350kHz–2.5MHz), 10μA light-load quiescent current, and low-dropout mode for automotive cold-crank operation. Used in engine control units and ADAS power rails where wide VIN, low IQ, and robust thermal performance are critical.
For engineers reviewing the MPQ4468GL-AEC1-Z datasheet, MPQ4468GL-AEC1-Z pinout, MPQ4468GL-AEC1-Z application, or MPQ4468GL-AEC1-Z equivalent, key selection criteria include its AEC-Q100 qualification, 80ns minimum on-time for high duty-cycle operation, AAM light-load efficiency mode, hiccup-mode OCP, and QFN-16 (3mm×4mm) package with exposed thermal pad for automotive-grade thermal management.
Technical Context
The MPQ4468GL-AEC1-Z employs peak-current-mode PWM control with internal error amplifier and 0.8V feedback reference, enabling fast transient response and stable regulation under dynamic load conditions. Its AAM (Advanced Asynchronous Modulation) architecture dynamically scales switching frequency at light loads to minimize gate-driving and switching losses.
It supports external clock synchronization with selectable in-phase or 180° out-of-phase alignment via the PHASE pin, and integrates low-dropout mode to sustain regulation during automotive cold-crank (VIN down to 3.3V). Thermal shutdown (170°C) and hiccup-mode over-current protection ensure fault resilience in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - Supports full automotive battery range including cold-crank (3.3V) and load-dump (36V) transients. |
| Output Current | 3.5A continuous - Sustained delivery without derating at TJ ≤ 125°C with proper PCB thermal design. |
| Quiescent Current | 10μA typical in sleep mode - Enables >1-year battery standby in always-on automotive modules. |
| Switching Frequency | 350kHz to 2.5MHz programmable - Allows EMI optimization and compact magnetics selection across applications. |
| Feedback Reference | 0.8V ±2% - Enables precise output voltage setting (e.g., 3.3V, 5V) using standard resistor dividers. |
| Min On-Time | 80ns - Supports high step-down ratios (e.g., 24V→3.3V) at high frequencies without pulse-skipping instability. |
| HS MOSFET RDS(on) | 90mΩ typical - Reduces conduction loss and thermal stress at full load in QFN-16 package. |
Pinout & Package
MPQ4468GL-AEC1-Z is housed in a thermally enhanced QFN-16 (3mm × 4mm, 0.5mm pitch) package with exposed thermal pad (Pin 4/9 PGND) for direct PCB copper pour attachment. The package meets MSL Level 1 and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Logic-high = in-phase sync; logic-low = 180° out-of-phase; must be tied to GND if unused to avoid floating state. |
| 2 VIN | Main power input | Supplies internal control circuitry and high-side switch; requires local ≥10μF ceramic decoupling to PGND. |
| 3,10 SW | Switch node | Drives external inductor; high dv/dt node requiring minimized trace area and guard ring layout. |
| 4,9 PGND | Power ground | High-current return path for MOSFET and inductor; must connect directly to thermal pad and large copper pour. |
| 5 EN | Enable control | Active-high enable with 1.05V threshold; hysteresis ensures noise immunity during ignition cycling. |
| 6 SYNC | External clock input | Accepts 350kHz–2.5MHz square wave; external clock must exceed RFREQ-set frequency by ≥250kHz. |
| 7 PG | Power-good open-drain output | Asserts high when VOUT is within ±10% of target; 30μs deglitch prevents false triggers during transients. |
| 8 BIAS | External bias supply | Optional 5V–18V auxiliary supply to reduce VCC regulator dissipation and improve full-load efficiency. |
| 11 BST | Bootstrap supply | Connects via ≥0.1μF ceramic capacitor to SW to drive high-side MOSFET gate above VIN. |
| 12 VCC | Internal bias rail | Regulated ~5V supply for gate drivers and logic; requires ≥1μF ceramic decoupling to AGND. |
| 13 AGND | Analog ground | Reference for FB, SS, FREQ, and internal error amplifier; must be star-connected to PGND at single point. |
| 14 SS | Soft-start timing | 10μA current source charges external capacitor to linearly ramp VREF and limit inrush current. |
| 15 FB | Voltage feedback input | Monitors resistive divider output; 0.8V threshold enables accurate output setting with minimal trace parasitics. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets fSW: 180kΩ → 475kHz, 82kΩ → 1MHz, 27kΩ → 2.5MHz (typical). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Rated for −40°C to +125°C junction temperature with full automotive reliability testing (HTOL, TC, UHAST). |
| Low-dropout mode | Maintains regulation with VIN as low as 3.3V and VOUT = 3.3V - essential for engine start-stop and cold-crank survival. |
| Hiccup-mode over-current protection | Reduces average short-circuit current to <100mA, limiting power dissipation and enabling safe auto-recovery. |
| Programmable soft-start | External capacitor sets ramp time; prevents inrush-induced input droop and output overshoot during power-up. |
| Thermal shutdown with hysteresis | Shuts down at 170°C and restarts at 150°C - prevents thermal runaway while allowing recovery after transient overload. |
| Advanced Asynchronous Modulation (AAM) | Reduces light-load IQ to 10μA by skipping cycles and scaling fSW - achieves >85% efficiency at 1mA load. |
Applications
| Engine Control Unit (ECU) Power Rail | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers microcontroller, CAN transceiver, and sensor interface in gasoline/diesel engine ECUs exposed to 12V battery with cold-crank (3.3V) and load-dump (36V) events. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator providing regulated, low-noise, fault-tolerant power with AEC-Q100 compliance. Use Value: Maintains CPU operation during cranking via low-dropout mode and survives 36V transients without external TVS, reducing BOM count. |
Use Scenario: Supplies image sensor and ISP in forward-facing camera modules operating in ambient temperatures from −40°C to +105°C. IC Role / Device Role / Timing Role: High-efficiency, low-IQ step-down converter enabling always-on vision processing with minimal battery drain. Use Value: 10μA sleep-mode IQ extends vehicle park-time battery life; 2.5MHz operation allows ultra-compact 2.2μH inductor footprint. |
| Automotive Infotainment Head Unit | Electric Power Steering (EPS) Controller |
Use Scenario: Generates 1.2V core and 3.3V I/O rails for ARM-based SoC in infotainment systems with variable input due to alternator ripple. IC Role / Device Role / Timing Role: Synchronized buck converter (via SYNC pin) minimizing beat-frequency noise in audio-sensitive domains. Use Value: External clock sync eliminates audible switching noise; ±2% VREF ensures stable SoC operation across temperature. |
Use Scenario: Provides isolated 5V auxiliary supply for motor gate drivers and position sensors in EPS systems requiring functional safety. IC Role / Device Role / Timing Role: Safety-critical power stage with hiccup-mode OCP and thermal shutdown to prevent uncontrolled motor motion. Use Value: Hiccup-mode limits fault energy during shorted gate-driver traces; PG signal feeds into ASIL-B watchdog monitoring chain. |
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 |
|---|---|---|---|
| MPQ4467GL-AEC1-Z | 2.5A output current, identical 3.3V–36V input and AEC-Q100 Grade 1 rating | Suitable for lower-power clusters or body control modules where 3.5A headroom is unnecessary | Select when system load is ≤2.2A and board space allows same QFN-16 footprint. |
| TPS54360BQPWPRQ1 | 3.5A, 3.5V–60V input, but higher 14μA IQ and no AAM mode; uses external MOSFETs | Used in commercial-automotive hybrids where extended VIN >36V is required but AEC-Q100 Grade 1 not mandated | Choose only if input must exceed 36V; otherwise MPQ4468GL-AEC1-Z offers superior light-load efficiency and integration. |
Compared with MPQ4467GL-AEC1-Z, the MPQ4468GL-AEC1-Z delivers 40% higher output current in identical footprint and thermal profile; versus TPS54360BQPWPRQ1, it provides 43% lower quiescent current, integrated MOSFET, and AAM mode-critical for battery-sensitive automotive subsystems.
Availability
MPQ4468GL-AEC1-Z is available at Aetrix Electronics and suitable for automotive ECU power rails, ADAS camera modules, infotainment head units, and electric power steering controllers requiring stable component supply with AEC-Q100 assurance and long-term production continuity.
Supply support for MPQ4468GL-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 design focus on efficiency, integration, and reliability for automotive, industrial, and computing markets.
The MPQ4468 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for demanding vehicular environments requiring AEC-Q100 qualification, wide-input operation, and ultra-low quiescent current.
FAQ
What is the minimum input voltage required for regulation at 3.3V output?
The MPQ4468GL-AEC1-Z supports dropout operation down to VIN = 3.3V when configured for 3.3V output, enabled by its low dropout mode. This allows uninterrupted regulation during automotive cold-crank events where battery voltage dips to 3.3V, provided the output load does not exceed 1.5A at that condition per thermal limits.
Can the BIAS pin be left floating in a 12V input application?
Yes - the BIAS pin may be left floating or tied to AGND when VIN ≤ 18V. In 12V systems, the internal VCC regulator efficiently powers control circuitry without external bias; connecting BIAS is optional and only recommended for VIN >18V to reduce die temperature and improve full-load efficiency.
How does the PHASE pin affect multi-converter synchronization?
The PHASE pin selects whether the internal oscillator aligns in-phase or 180° out-of-phase with the external SYNC signal. Driving PHASE high enables in-phase operation for interleaved current sharing; driving low enables phase-shifted operation to reduce input capacitor RMS current and EMI peaks in multi-rail systems.
What is the purpose of the 30μs PG deglitch timer?
The 30μs deglitch timer on the PG pin prevents false power-good assertions during brief output voltage excursions caused by load transients or startup overshoot. It ensures the PG signal only goes high after VOUT remains within ±10% of target for ≥30μs, improving system-level sequencing reliability.
Does the MPQ4468GL-AEC1-Z require an external freewheel diode?
No - the MPQ4468GL-AEC1-Z is an asynchronous buck converter with an integrated high-side MOSFET but no synchronous rectifier. It relies on the inherent body diode of the external low-side MOSFET (or an external Schottky diode in non-synchronous designs) for freewheeling; no additional diode is needed beyond the standard buck topology components.
How is switching frequency set when both FREQ resistor and SYNC signal are present?
When both FREQ resistor and SYNC signal are applied, the MPQ4468GL-AEC1-Z locks to the external SYNC clock and ignores the FREQ pin setting. The internal oscillator is disabled, and switching occurs precisely at the SYNC frequency - provided the SYNC signal falls within 350kHz–2.5MHz and exceeds the FREQ-set frequency by ≥250kHz.
What thermal resistance value should be used for PCB layout design?
For production design, use θJA = 41°C/W measured on the EVQ4468-L-00A 4-layer evaluation board (6.35cm × 6.35cm). This value assumes 2oz copper, thermal vias under the exposed pad, and 20cm² total copper area - exceeding this layout yields lower junction temperature and higher sustained output current capability.
MPQ4468GL-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-PowerVQFN
- 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:
- 3.5A
- 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:
- 16-QFN (3x4)
MPQ4468GL-AEC1-Z FAQ
1.How can I place an order for MPQ4468GL-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4468GL-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 MPQ4468GL-AEC1-Z reliable?
The price and inventory of MPQ4468GL-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 MPQ4468GL-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4468GL-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4468GL-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4468GL-AEC1-Z?
MPQ4468GL-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4468GL-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 MPQ4468GL-AEC1-Z?
For technical support, including MPQ4468GL-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4468GL-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4468GL-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4468GL-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 MPQ4468GL-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4468GL-AEC1-Z?
All MPQ4468GL-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4468GL-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 MPQ4468GL-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4468GL-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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