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Monolithic Power Systems Inc. MPQ9841GLE-33-AEC1-P
- Part No.:
- MPQ9841GLE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9841GLE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,293
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Product details
Overview
MPQ9841GLE-33-AEC1-P from Monolithic Power Systems is a 36V, 1A synchronous step-down DC/DC converter with fixed 3.3V output, AEC-Q100 Grade 1 qualification, 14μA no-load quiescent current, and programmable 350kHz–2.5MHz switching frequency-designed for automotive infotainment power rails and ADAS camera modules requiring stable low-noise 3.3V supply under wide input transients.
For engineers reviewing the MPQ9841GLE-33-AEC1-P datasheet, MPQ9841GLE-33-AEC1-P pinout, MPQ9841GLE-33-AEC1-P application, or MPQ9841GLE-33-AEC1-P equivalent, this device delivers automotive-grade reliability with integrated high-side (125mΩ) and low-side (115mΩ) MOSFETs, power-good indication, external soft-start control, and low-dropout mode for high-duty-cycle operation in 12V/24V vehicle systems.
Technical Context
The MPQ9841GLE-33-AEC1-P uses peak-current-mode control with internal error amplifier and 0.8V reference to regulate fixed 3.3V output across 3.3V–36V input range. Its programmable oscillator supports resistor-based or external clock synchronization, enabling EMI optimization via frequency dithering or system-level timing alignment.
It implements Advanced Asynchronous Mode (AAM) for light-load efficiency and forced CCM selection via SYNC pin logic state at startup. Integrated BST refresh circuitry sustains >99% effective duty cycle during low-VIN dropout, while hiccup-mode OCP, thermal shutdown, and PG monitoring ensure robust fault handling in automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports direct connection to automotive battery with cold-crank (3.3V) and load-dump (36V) tolerance. |
| Output Voltage | Fixed 3.3V ±1.5% - eliminates external feedback resistors; optimized for MCU, sensor, and interface IC bias rails. |
| Continuous Output Current | 1A - sufficient for powering dual-core microcontrollers, CAN transceivers, and image signal processors in compact ECUs. |
| No-Load Quiescent Current | 14μA - enables multi-year battery life in always-on automotive modules such as telematics wake-up circuits. |
| Switching Frequency Range | 350kHz to 2.5MHz - allows PCB layout optimization to avoid AM/FM bands and meet CISPR-25 Class 5 conducted/radiated EMI limits. |
| Protection Features | Hiccup OCP, thermal shutdown, and open-drain PG signal - provides fail-safe behavior during short-circuit events and thermal overload without latch-off. |
| AEC-Q100 Qualification | Grade 1 (−40°C to +125°C TJ) - validated for under-hood and dashboard-mounted applications per automotive reliability standards. |
Pinout & Package
MPQ9841GLE-33-AEC1-P is housed in a wettable-flank QFN-16 package (3mm × 4mm), optimized for automated optical inspection (AOI) and high-reliability solder joint formation in automotive production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures 0° or 180° phase alignment with external SYNC clock; tie to GND if unused. |
| 2 VIN | Main input supply | Accepts 3.3V–36V; requires local 10μF ceramic decoupling to minimize switching noise injection. |
| 3,10 SW | Power switch node | Internal connection point of HS/LS MOSFETs; must be routed with minimal loop area to reduce EMI. |
| 4,9 PGND | Power ground return | High-current return path for power stage; requires dedicated copper pour and multiple vias to thermal pad. |
| 5 EN | Enable control | Digital on/off control with 0.9–1.2V threshold; must not be left floating. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; logic level at startup selects AAM (low) or forced CCM (high). |
| 7 PG | Power-good indicator | Open-drain output active when VOUT is within ±10% of 3.3V; pulls up externally to enable system sequencing. |
| 8 BIAS | External bias supply | Optional 5–18V input to reduce internal regulator loss and improve efficiency above 15V VIN. |
| 11 BST | Bootstrap supply | Drives HS-FET gate; requires 0.1–1μF ceramic capacitor between BST and SW for reliable high-side conduction. |
| 12 VCC | Internal bias rail | 5V regulated output for control circuitry; requires ≥1μF local decoupling to AGND. |
| 13 AGND | Analog ground reference | Low-noise reference for FB, SS, and error amplifier; separated from PGND to prevent coupling. |
| 14 SS | Soft-start timing | 10μA current source charges external capacitor; sets ramp time to limit inrush current during power-up. |
| 15 FB | Feedback input | Internally tied to 3.3V regulation; not connected externally in fixed-output variant. |
| 16 FREQ | Frequency programming | Resistor-to-ground sets switching frequency; 180kΩ = ~475kHz, 82kΩ = ~1MHz, 27kΩ = ~2.5MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-16 | Enables AOI-compatible solder joint inspection for zero-defect automotive manufacturing. |
| Low-dropout mode | Maintains regulation down to VIN = 3.3V with >99% duty cycle via BST refresh, critical for cold-crank operation. |
| Programmable minimum on-time | 80ns enables stable 3.3V output even at 2.5MHz switching with small inductors (e.g., 1.5μH). |
| Integrated 125mΩ/115mΩ MOSFETs | Eliminates external power devices and reduces BOM count while delivering >92% efficiency at 1A/12V→3.3V. |
| PG signal with 30μs deglitch | Ensures clean power sequencing in multi-rail systems by rejecting transient dips during load steps. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module |
|---|---|
Use Scenario: Powers SoC, display interface, and audio codec in centralized head unit with 12V battery input subject to load dump and cold crank. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator supplying core logic voltage with tight line/load regulation and fast transient response. Use Value: Maintains stable operation during 6V–16V input transients; 14μA IQ extends backup battery runtime during ignition-off sleep mode. | Use Scenario: Supplies image sensor, ISP, and MIPI serializer in front-facing ADAS camera exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Fixed-output 3.3V power stage with AEC-Q100 Grade 1 qualification and thermal shutdown for safety-critical vision processing. Use Value: Delivers 1A continuous current at −40°C to +125°C junction temperature; PG signal enables fail-safe camera reset on output fault. |
| Body Control Module (BCM) | Automotive Telematics Unit |
Use Scenario: Provides regulated 3.3V for LIN transceivers, door lock actuators, and ambient light sensors in distributed body electronics. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter supporting always-on functionality with ultra-low standby current. Use Value: 2μA shutdown current minimizes parasitic drain on 12V battery; hiccup OCP prevents thermal runaway during wiring faults. | Use Scenario: Powers cellular modem, GNSS receiver, and secure element in embedded telematics gateway with GPS/4G connectivity. IC Role / Device Role / Timing Role: Automotive-grade DC/DC with EMI-compliant design meeting CISPR-25 Class 5 for RF-sensitive communication subsystems. Use Value: Synchronizable switching frequency avoids interference with LTE bands; wettable flank package ensures IPC-A-610 Class 3 solder joint reliability. |
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 |
|---|---|---|---|
| MPQ4420AGL-AEC1-Z | 2A output, 36V input, 15μA IQ, same QFN-16 package but no wettable flank | Higher current capability; lacks wettable flank for AOI and lower thermal resistance | Select when >1A load margin is required and AOI is not mandated. |
| TPS543320RHLT | 3A output, 36V input, 12μA IQ, 3mm×3mm QFN, supports PMBus telemetry | Includes digital interface and telemetry; larger footprint and higher cost than MPQ9841 | Select when system-level monitoring (voltage/current/temp) is required for functional safety compliance. |
Compared with MPQ4420AGL-AEC1-Z and TPS543320RHLT, the MPQ9841GLE-33-AEC1-P offers optimal balance of AEC-Q100 Grade 1 reliability, wettable flank manufacturability, and 1A/3.3V fixed-output simplicity for cost-sensitive automotive modules where digital telemetry or >1A headroom is unnecessary.
Availability
MPQ9841GLE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ9841GLE-33-AEC1-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 over two decades of expertise in DC/DC conversion, motor drivers, and automotive power solutions.
The MPQ9841 product line targets automotive power management applications requiring AEC-Q100 qualification, low quiescent current, and high integration-specifically engineered for infotainment, ADAS, and chassis electronics operating across harsh vehicle electrical environments.
FAQ
What is the purpose of the PHASE pin on MPQ9841GLE-33-AEC1-P?
The PHASE pin configures synchronization alignment: driving it high selects in-phase operation with the external SYNC clock, while driving it low selects 180° out-of-phase operation. This enables interleaving with other converters to reduce input/output ripple. If unused, it must be tied to PGND to prevent noise coupling into the sensitive phase-detection circuitry.
Can MPQ9841GLE-33-AEC1-P operate with input voltage below 3.3V?
No. The absolute minimum input voltage is 3.3V per the recommended operating conditions. Below this, the internal regulator cannot sustain VCC and the error amplifier loses reference stability. The device enters UVLO and disables switching until VIN rises above 2.8V (typical rising threshold) with 150mV hysteresis.
How does the BST refresh mechanism work during low-VIN dropout?
When BST-to-SW voltage drops below 2.5V, the high-side FET is turned off and the low-side FET is forced on to recharge the bootstrap capacitor through the SW–PGND path. This occurs in DCM or PSM modes, extending effective duty cycle beyond 99% and maintaining regulation down to VIN = VOUT + VHS_RDS(on) × IOUT + diode drop.
Is external compensation required for MPQ9841GLE-33-AEC1-P?
No. The MPQ9841GLE-33-AEC1-P features an optimized internal compensation network tailored for typical 3.3V output configurations with 4.7μH–10μH inductors. External compensation components are unnecessary unless custom dynamic response or stability margins are required for unusual output capacitor ESR or layout parasitics.
What is the function of the BIAS pin, and when should it be used?
The BIAS pin accepts an external 5–18V supply to power the internal control circuitry, bypassing the VIN-regulated VCC path. Use it when VIN exceeds 15V to reduce power dissipation and improve efficiency; leave floating or tie to PGND if unused. It connects internally via a diode, so reverse current is blocked.
Does MPQ9841GLE-33-AEC1-P support spread-spectrum frequency modulation?
No. The MPQ9841GLE-33-AEC1-P supports only fixed-frequency PWM or external clock synchronization via the SYNC pin. It does not include built-in spread-spectrum modulation; EMI reduction relies on selectable switching frequency, layout optimization, and external filtering per CISPR-25 Class 5 test setup.
How is soft-start time calculated when using an external capacitor on the SS pin?
Soft-start time is calculated as tSS ≈ CSS × 0.8V / 10μA, where CSS is the capacitance in farads. For example, a 100nF capacitor yields ~8ms ramp time. The SS pin sources a constant 10μA current to charge the capacitor; the FB reference ramps linearly from 0V to 0.8V, limiting inrush current proportionally.
MPQ9841GLE-33-AEC1-P 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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 1A
- 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)
MPQ9841GLE-33-AEC1-P FAQ
1.How can I place an order for MPQ9841GLE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9841GLE-33-AEC1-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 MPQ9841GLE-33-AEC1-P reliable?
The price and inventory of MPQ9841GLE-33-AEC1-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ9841GLE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ9841GLE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9841GLE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9841GLE-33-AEC1-P?
MPQ9841GLE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9841GLE-33-AEC1-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 MPQ9841GLE-33-AEC1-P?
For technical support, including MPQ9841GLE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9841GLE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ9841GLE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ9841GLE-33-AEC1-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 MPQ9841GLE-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ9841GLE-33-AEC1-P?
All MPQ9841GLE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9841GLE-33-AEC1-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 MPQ9841GLE-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ9841GLE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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