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Monolithic Power Systems Inc. MPQ4430GLE-38-AEC1-Z
- Part No.:
- MPQ4430GLE-38-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ4430GLE-38-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.8V 3.5A 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MPQ4430GLE-38-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering 3.5A continuous output at fixed 3.8V with 3.3V–36V input range, 10μA sleep-mode quiescent current, and integrated 90mΩ/40mΩ MOSFETs - deployed in automotive infotainment power rails, ADAS camera modules, and body control units requiring cold-crank resilience.
For engineers reviewing the MPQ4430GLE-38-AEC1-Z datasheet, MPQ4430GLE-38-AEC1-Z pinout, MPQ4430GLE-38-AEC1-Z application, or MPQ4430GLE-38-AEC1-Z equivalent, key selection criteria include its AAM/CCM mode selectability via SYNC pin, 80ns minimum on-time for high-duty-cycle operation, wettable flank QFN-16 package for automated optical inspection, and ±2.5% output voltage accuracy over –40°C to +125°C junction temperature.
Technical Context
The MPQ4430GLE-38-AEC1-Z implements current-mode PWM control with valley-current OCP and hiccup-mode short-circuit protection, enabling fast transient response and fault containment in automotive 12V/24V systems. Its programmable 350kHz–2.5MHz switching frequency supports EMI optimization and layout flexibility.
Advanced Asynchronous Mode (AAM) dynamically scales switching frequency under light load to reduce gate-driving and switching losses, achieving >85% efficiency at 1mA output while maintaining 10μA quiescent current - critical for always-on vehicle subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (4.5V) and load-dump (40V abs max). |
| Output Voltage | Fixed 3.8V ±2.5% - factory-trimmed for precision; eliminates external feedback resistors and reduces BOM count. |
| Continuous Output Current | 3.5A - sustained delivery with internal MOSFETs (90mΩ HS / 40mΩ LS) and thermal shutdown at 170°C. |
| Quiescent Current | 10μA in sleep mode - enables >1-year battery standby in telematics and key-off monitoring circuits. |
| Switching Frequency | 350kHz to 2.5MHz - programmable via FREQ pin resistor or external SYNC clock; supports CISPR-25 Class 5 EMI compliance. |
| Package | QFN-16 (3mm × 4mm) with wettable flanks - enables AOI-compatible solder joint inspection and enhanced thermal performance (θJA = 43°C/W on EV board). |
| AEC-Q100 Grade | Grade 1 (–40°C to +125°C TJ) - qualified for engine bay, front-end, and passenger compartment applications per automotive reliability standards. |
Pinout & Package
MPQ4430GLE-38-AEC1-Z is housed in a thermally enhanced, lead-free, wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad. Pin 1 is marked by a dot; pins are numbered counter-clockwise from top-left corner in top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Drives high for in-phase sync with external clock; low for 180° out-of-phase; tie to GND if unused to prevent floating. |
| 2 VIN | Main power input | Accepts 3.3V–36V; requires local 10µF ceramic decoupling close to pin to suppress switching noise. |
| 3,10 SW | Switch node | Internal connection point of HS/LS MOSFETs; routes high dv/dt switching waveform - minimize trace area and avoid routing near sensitive analog nodes. |
| 4,9 PGND | Power ground | High-current return path for power stage; must be connected to large copper pour with multiple vias to thermal pad for thermal and EMI integrity. |
| 5 EN | Enable control | Active-high logic input (1.05V threshold); supports controlled sequencing and system-level power management. |
| 6 SYNC | Frequency sync & mode select | Configures CCM (SYNC ≥1.8V at startup) or AAM (SYNC ≤0.4V/floating); also accepts external clock 350kHz–2.5MHz. |
| 7 PG | Power good indicator | Open-drain output asserting high when VOUT is within ±10% of 3.8V; used for downstream supply enable or fault reporting. |
| 8 BIAS | External bias supply | Optional 5V–18V input to reduce internal LDO dissipation and improve efficiency above 15V VIN. |
| 11 BST | Bootstrap supply | Connects 0.1µF ceramic capacitor between BST and SW to drive HS-FET gate; critical for high-side conduction. |
| 12 VCC | Internal bias rail | Regulated ~5V output powering control circuitry; requires ≥1µF decoupling to AGND for stable operation. |
| 13 AGND | Analog ground reference | Separate ground for error amplifier, FB, SS, and timing circuits; must be star-connected to PGND at single point. |
| 14 SS | Soft-start timing | 10µA current source charges external capacitor; sets ramp time to limit inrush current - floating defaults to 0.7ms internal setting. |
| 15 FB | Feedback input | Connected directly to 3.8V output (fixed version); no external divider needed - simplifies layout and improves regulation accuracy. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets fSW: 180kΩ → ~475kHz, 82kΩ → ~1MHz, 27kΩ → ~2.5MHz - enables EMI band steering. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-16 | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect automotive manufacturing. |
| Low dropout mode | Maintains regulation down to VIN = VOUT + 0.5V - supports cold-crank operation below 6V without dropout. |
| Valley-current OCP with hiccup | Detects overcurrent at inductor valley; enters low-duty-cycle hiccup mode to limit average fault current to <100mA. |
| Programmable soft-start | Adjustable ramp time via external SS capacitor prevents input voltage sag and output overshoot during power-up. |
| 80ns minimum on-time | Supports 3.8V output from 36V input at 2.5MHz (min duty ≈ 10.6%) - enables high-frequency, compact designs. |
| Power good (PG) indicator | Open-drain output with 30µs deglitch timer provides reliable system-level power sequencing and fault detection. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display interface, and audio codec in head-unit systems with wide input transients and strict EMI limits. IC Role / Device Role / Timing Role: Primary 3.8V buck regulator supplying core logic voltage; operates in forced CCM for low ripple and predictable EMI profile. Use Value: Wettable flank package ensures solder joint reliability across thermal cycles; AEC-Q100 Grade 1 guarantees operation at 125°C ambient. |
Use Scenario: Supplies image sensor and ISP in forward-facing driver assistance cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Fixed-output buck converter delivering clean 3.8V at up to 3.5A; uses AAM mode to maintain <15μA system standby current. Use Value: 10μA sleep IQ extends battery backup runtime; 80ns min on-time sustains regulation during 4.5V cold-crank events. |
| Body Control Unit (BCU) | Telematics Control Unit (TCU) |
|
Use Scenario: Provides regulated 3.8V for microcontroller, CAN transceiver, and sensor interface in door modules and lighting controllers. IC Role / Device Role / Timing Role: System power manager with EN-controlled sequencing and PG-monitored health reporting to main ECU. Use Value: Integrated OCP and thermal shutdown protect against wiring faults; PG signal enables fail-safe shutdown coordination. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure MCU in always-connected vehicle tracking units with battery backup. IC Role / Device Role / Timing Role: High-efficiency buck converter operating in AAM during GPS sleep cycles; switches to CCM during data transmission bursts. Use Value: 3.3V–36V input handles jump-start and alternator ripple; 1μA shutdown current preserves battery for >12 months in parked state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4431GLE-38-AEC1-Z | Same pinout and specs, but adds spread-spectrum frequency modulation (SSFM) for improved EMI reduction. | Better suited for CISPR-25 Class 5 radiated emissions compliance in space-constrained TCU layouts. | Select when EMI margin is insufficient with standard MPQ4430; SSFM adds no bill-of-material cost or layout change. |
| TPS543B20RTWR | 4V–18V input, 3.5A, 3.3V/5V adjustable; no AEC-Q100 qualification; higher 25μA IQ in sleep mode. | Limited to non-safety-critical cabin applications; lacks cold-crank support and automotive qualification. | Consider only for cost-sensitive industrial or consumer prototypes where AEC-Q100 and wide VIN are not required. |
Compared with MPQ4431GLE-38-AEC1-Z, the MPQ4430GLE-38-AEC1-Z offers identical functionality without SSFM - simplifying EMI tuning when baseline compliance is achieved. Against TPS543B20RTWR, it delivers broader input range, lower IQ, and full automotive qualification - making it the sole viable option for production-grade vehicle systems.
Availability
MPQ4430GLE-38-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with guaranteed long-term availability and AEC-Q100 compliance.
Supply support for MPQ4430GLE-38-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MPQ4430 product line targets automotive power conversion with AEC-Q100 qualification, ultra-low quiescent current, and integrated MOSFETs - engineered specifically for harsh-environment, safety-conscious vehicle subsystems.
FAQ
What is the purpose of the BIAS pin, and when should it be used?
The BIAS pin supplies an external 5V–18V bias voltage to power the internal gate drivers, reducing power dissipation in the VCC LDO and improving overall efficiency-especially at high input voltages (>15V). It should be connected to a clean, low-impedance 5V rail (e.g., from a pre-regulator) when optimizing thermal performance or efficiency in high-power-density automotive modules.
How does the MPQ4430GLE-38-AEC1-Z handle cold-crank conditions?
It maintains regulation down to VIN = 4.5V via low-dropout mode and supports input as low as 3.3V with reduced output current capability. Combined with 125°C junction rating and AEC-Q100 Grade 1 qualification, it sustains 3.8V output during engine cranking transients without reset or brownout-verified across –40°C to +125°C operating range.
Can the MPQ4430GLE-38-AEC1-Z be synchronized to an external clock, and what are the requirements?
Yes-apply a 350kHz–2.5MHz CMOS-level clock to the SYNC pin. The external clock must exceed the RFREQ-set frequency by ≥250kHz to ensure reliable locking. SYNC also selects CCM (high at startup) or AAM (low/floating at startup), enabling dynamic mode switching based on load and EMI requirements.
What is the function of the PHASE pin, and how does it affect multi-phase operation?
The PHASE pin configures synchronization phase relative to the external SYNC clock: driven high for in-phase operation, low for 180° out-of-phase. This enables two MPQ4430s to operate interleaved-reducing input/output ripple and EMI-without requiring external phase-shift circuitry or complex timing control.
Is the FB pin left unconnected or tied to output in the fixed 3.8V version?
In the MPQ4430GLE-38-AEC1-Z, the FB pin is internally connected to the 3.8V reference and must be tied directly to the output node (VOUT) - not left floating or connected to a resistor divider. This configuration ensures optimal regulation accuracy and stability, leveraging the factory-trimmed feedback network.
Does the wettable flank feature require special PCB stencil or reflow profile adjustments?
No - wettable flanks use standard lead-free reflow profiles and standard stencil apertures. The extended sidewall plating enables reliable solder fillet formation visible to AOI systems, but does not alter paste volume, thermal ramp rates, or peak temperature requirements beyond JEDEC J-STD-020.
How is over-current protection implemented, and does it latch or auto-recover?
OCP uses valley-current detection during low-side conduction and triggers hiccup mode upon fault: the device shuts down for ~10ms, then attempts restart. This limits average fault current to <100mA and prevents thermal runaway - no manual reset is needed, and recovery is fully automatic after fault removal.
MPQ4430GLE-38-AEC1-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 16-VQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.3V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 3.5A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 16-QFN (3x4)
MPQ4430GLE-38-AEC1-Z FAQ
1.How can I place an order for MPQ4430GLE-38-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4430GLE-38-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 MPQ4430GLE-38-AEC1-Z reliable?
The price and inventory of MPQ4430GLE-38-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 MPQ4430GLE-38-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ4430GLE-38-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4430GLE-38-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4430GLE-38-AEC1-Z?
MPQ4430GLE-38-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4430GLE-38-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 MPQ4430GLE-38-AEC1-Z?
For technical support, including MPQ4430GLE-38-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4430GLE-38-AEC1-Z requirements.
6.How does Aetrix verify that MPQ4430GLE-38-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ4430GLE-38-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 MPQ4430GLE-38-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ4430GLE-38-AEC1-Z?
All MPQ4430GLE-38-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4430GLE-38-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 MPQ4430GLE-38-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ4430GLE-38-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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