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Monolithic Power Systems Inc. MPQ4462DQ-AEC1-LF-P
- Part No.:
- MPQ4462DQ-AEC1-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MPQ4462DQ-AEC1-LF-P.pdf
- Description:
- IC REG BUCK ADJ 3.5A 10QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,951
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Product details
Overview
MPQ4462DQ-AEC1-LF-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, 3.5A, 4MHz synchronous step-down DC/DC converter with integrated 150mΩ high-side MOSFET, 3.8V–36V input range, and 0.8V–30V adjustable output voltage. It delivers ultra-low 120µA quiescent current for automotive battery systems and supports programmable switching frequency up to 4MHz for EMI-sensitive AM radio and infotainment power rails.
For engineers reviewing the MPQ4462DQ-AEC1-LF-P datasheet, MPQ4462DQ-AEC1-LF-P pinout, MPQ4462DQ-AEC1-LF-P application, or MPQ4462DQ-AEC1-LF-P equivalent, key selection criteria include AEC-Q100 qualification, 4MHz programmability, internal current limit without sense resistor, thermal shutdown at 150°C, and QFN10 (3mm×3mm) package with exposed thermal pad.
Technical Context
The MPQ4462DQ-AEC1-LF-P implements current-mode control with a 9A/V transconductance error amplifier and cycle-by-cycle peak-current limiting. Its programmable oscillator uses an external resistor (RFREQ) to set frequency from 0.2MHz to 4MHz, enabling optimization for efficiency or EMI performance.
It integrates a bootstrap regulator for high-side gate drive, with dedicated BST and SW pins requiring a 0.1µF ceramic capacitor between them. Startup includes internal soft-start (1.5ms ramp), UVLO (3.0V rising threshold), and frequency foldback to prevent inductor current runaway during light-load transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 3.5A continuous - supports automotive ADAS ECUs and body control modules without external current boosting. |
| Input Voltage Range | 3.8V to 36V - accommodates cold-crank (4.5V) and load-dump (36V) transients per ISO 7637-2. |
| Switching Frequency | Up to 4MHz - enables compact magnetics and avoids AM band (0.53–1.71MHz); set via RFREQ resistor. |
| Quiescent Current | 120µA - sustains >1-year battery standby in always-on vehicle modules (e.g., telematics, alarm systems). |
| Feedback Reference | 0.792V ±1.5% - enables precise output regulation across temperature; sets VOUT = 0.792 × (1 + R1/R2). |
| Internal MOSFET RDS(ON) | 150mΩ - reduces conduction loss at 3.5A, delivering >92% efficiency at 12V→3.3V/2A. |
| Thermal Shutdown | 150°C with 15°C hysteresis - ensures fault-tolerant operation under sustained overload or poor PCB heatsinking. |
Pinout & Package
MPQ4462DQ-AEC1-LF-P is housed in a thermally enhanced 3mm×3mm QFN10 package with exposed ground pad for optimal PCB heat dissipation (θJA = 50°C/W, θJC = 12°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 - SW | Switch Node | Drives external Schottky catch diode; high dv/dt node requiring minimized loop area and local ceramic decoupling. |
| 3 - EN | Enable Input | Logic-controlled shutdown: active-high (1.5V rising threshold); internal 1µA pull-up allows floating-enable operation. |
| 4 - COMP | Error Amplifier Output | Drives external RC compensation network; clamped between 0.9V–2.0V; determines loop stability and transient response. |
| 5 - FB | Feedback Input | Senses output divider voltage; referenced to 0.792V internal bandgap; requires <10pF trace capacitance for stability. |
| 6 - GND | Power & Signal Ground | Common return for all circuits; must be connected to exposed pad and low-impedance ground plane. |
| 7 - FREQ | Frequency Set | Connects to ground via RFREQ resistor (e.g., 18kΩ → 4MHz); sets oscillator timing and light-load frequency foldback behavior. |
| 8, 9 - VIN | Input Supply | Accepts full 3.8V–36V range; requires local 10µF ceramic capacitor; powers internal 2.6V regulator. |
| 10 - BST | Bootstrap Supply | Charges external 0.1µF capacitor to ~5V; supplies floating gate driver for high-side MOSFET; critical for duty cycles >65%. |
| Exposed Pad | Thermal & Electrical Ground | Mandatory solder connection to solid GND plane with ≥9 thermal vias (15mil, 40mil pitch) for thermal reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Internally-set current limit | Eliminates external sense resistor, reducing BOM count and PCB footprint while maintaining 4.0–5.5A overcurrent protection. |
| Stable with ceramic output capacitors | Enables use of low-ESR, high-frequency MLCCs (e.g., 22µF X5R) without phase-margin degradation or oscillation risk. |
| Internal soft-start | 1.5ms controlled VFB ramp prevents output overshoot and inrush current during ignition-cycle power-up. |
| Frequency foldback at light load | Reduces switching and gate-drive losses below 10% load, extending battery runtime without compromising regulation accuracy. |
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C junction operation, including HTOL, TC, and ESD testing - suitable for engine bay and dashboard applications. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
Use Scenario: Powers 3.3V/2A SoC and display interface in head-unit systems subject to 12V battery rail fluctuations and AM-band EMI constraints. IC Role / Device Role / Timing Role: Primary buck regulator providing clean, regulated 3.3V with 4MHz switching to avoid AM radio interference and support fast transient loads. Use Value: Enables compact layout with small 10µH inductor and eliminates need for external current-sense components, reducing total solution size by 25%. | Use Scenario: Supplies 1.8V/1.5A image sensor and ISP in rear-view camera modules operating in high-temperature engine compartment environments. IC Role / Device Role / Timing Role: High-efficiency, thermally robust step-down converter with AEC-Q100 qualification and 150°C thermal shutdown. Use Value: Maintains stable output under cold-crank (4.5V) and load-dump (36V) conditions while sustaining <120µA quiescent draw during vehicle sleep mode. |
| Body Control Module (BCM) Core Rail | Telematics Control Unit (TCU) Backup Supply |
Use Scenario: Generates 5V/3A main logic rail for BCM microcontroller, CAN transceivers, and LED drivers across vehicle lifecycle. IC Role / Device Role / Timing Role: Primary power source with integrated MOSFET, programmable frequency, and wide VIN range for robustness against battery transients. Use Value: Delivers >93% peak efficiency at 12V→5V/2A and supports seamless transition into pulse-skipping mode during key-off monitoring. | Use Scenario: Provides always-on 3.3V/0.5A backup supply for GPS, cellular modem, and secure boot memory in TCU during vehicle parking state. IC Role / Device Role / Timing Role: Ultra-low IQ buck converter with AEC-Q100 qualification ensuring 10+ year calendar life under continuous 125°C ambient exposure. Use Value: Achieves >1-year battery hold-up time using standard 12V lead-acid system, eliminating need for supercapacitor or secondary battery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480QRNLRQ1 | 4.5A output, 2.1MHz fixed frequency, no programmable fSW; requires external current-sense resistor. | Lacks 4MHz capability and AEC-Q100 Grade 1 thermal rating (rated Grade 0 only); unsuitable for AM-band EMI-critical zones. | Select when fixed-frequency simplicity outweighs EMI flexibility and higher current is needed without frequency tuning. |
| TPS543320RHLR | 3A output, 1.8MHz max, PMBus interface, integrated MOSFETs; higher IQ (25µA in Eco-mode, but not 120µA in full operation). | No AEC-Q100 qualification; digital control adds complexity; lacks automotive-grade thermal hysteresis and UVLO thresholds. | Select for digitally managed power trees where telemetry and sequencing matter more than automotive qualification or ultra-low IQ. |
Compared with LM61480QRNLRQ1 and TPS543320RHLR, MPQ4462DQ-AEC1-LF-P uniquely combines AEC-Q100 Grade 1, 4MHz programmability, 120µA IQ, and resistor-free current limiting - making it the only choice for space-constrained, EMI-sensitive, battery-backed automotive subsystems requiring long-term reliability without digital overhead.
Availability
MPQ4462DQ-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control modules requiring stable component supply, AEC-Q100 compliance, and long-lifecycle availability.
Supply support for MPQ4462DQ-AEC1-LF-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4462 product line targets automotive-grade DC/DC conversion, engineered specifically for harsh-environment applications demanding AEC-Q100 qualification, wide input range, and ultra-low quiescent current in compact packages.
FAQ
What is the minimum recommended input voltage for reliable startup?
The MPQ4462DQ-AEC1-LF-P features an under-voltage lockout (UVLO) with a rising threshold of 3.0V and hysteresis of 400mV. Reliable startup requires VIN ≥ 3.0V; operation below 2.6V disables the device. For cold-crank scenarios, ensure input remains above 3.8V nominal to maintain regulation and avoid dropout.
Can the MPQ4462DQ-AEC1-LF-P operate without an external bootstrap diode?
Yes - the device integrates a bootstrap regulator that charges the BST capacitor from VIN through an internal PMOS transistor. An external bootstrap diode is optional and only recommended for VIN < 5V, duty cycles >65%, or high-frequency operation (>2MHz) to improve charge efficiency and gate drive margin.
How does frequency foldback improve light-load efficiency?
At light loads, the MPQ4462DQ-AEC1-LF-P automatically reduces switching frequency to lower gate-driving and switching losses. This dynamic scaling - distinct from burst mode - maintains output regulation while increasing efficiency from ~70% (at 1mA) to >85% without audible noise or output voltage ripple spikes.
Is the exposed thermal pad electrically isolated?
No - the exposed pad is internally connected to GND and must be soldered directly to a solid PCB ground plane. It serves both thermal conduction (reducing θJA by up to 20°C/W) and electrical grounding; floating or insulated mounting degrades thermal performance and may cause instability or premature thermal shutdown.
What is the maximum achievable output voltage accuracy over temperature?
The internal feedback reference is specified as 0.792V ±1.5% over −40°C to +125°C junction temperature. Combined with resistor-divider tolerance (e.g., 1% R1/R2), total output voltage error remains within ±2.5% across full automotive temperature range - sufficient for most MCU, sensor, and interface rail requirements.
Does the MPQ4462DQ-AEC1-LF-P support forced PWM mode?
No - the device operates in variable-frequency current-mode control with automatic frequency foldback at light loads. It does not offer a forced PWM pin or register setting; pulse-skipping is inherent to its architecture for optimizing efficiency across the full 0–3.5A load range.
What layout practices prevent SW node ringing and EMI emissions?
Minimize the high-di/dt loop formed by VIN → SW → diode → GND using short, wide traces and placing the input capacitor ≤3mm from VIN/SW pins. Use a solid ground plane beneath the IC, connect the exposed pad with ≥9 thermal vias, and route FB/COMP traces away from SW and inductor - ideally on opposite layer with ground guard trace.
MPQ4462DQ-AEC1-LF-P 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):
- 3.8V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 30V
- Current - Output:
- 3.5A
- Frequency - Switching:
- Up to 4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-QFN (3x3)
MPQ4462DQ-AEC1-LF-P FAQ
1.How can I place an order for MPQ4462DQ-AEC1-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4462DQ-AEC1-LF-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 MPQ4462DQ-AEC1-LF-P reliable?
The price and inventory of MPQ4462DQ-AEC1-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ4462DQ-AEC1-LF-P is usually 5 days.
3.What payment methods are accepted for MPQ4462DQ-AEC1-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4462DQ-AEC1-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4462DQ-AEC1-LF-P?
MPQ4462DQ-AEC1-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4462DQ-AEC1-LF-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 MPQ4462DQ-AEC1-LF-P?
For technical support, including MPQ4462DQ-AEC1-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4462DQ-AEC1-LF-P requirements.
6.How does Aetrix verify that MPQ4462DQ-AEC1-LF-P is sourced from the original manufacturer or authorized distributors?
All MPQ4462DQ-AEC1-LF-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 MPQ4462DQ-AEC1-LF-P meets industry standards.
7.What is the process for return or replacement of MPQ4462DQ-AEC1-LF-P?
All MPQ4462DQ-AEC1-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4462DQ-AEC1-LF-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 MPQ4462DQ-AEC1-LF-P part is unused and in its original packaging.
Return procedure for MPQ4462DQ-AEC1-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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