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Monolithic Power Systems Inc. MPQ9841GLE-AEC1-Z
- Part No.:
- MPQ9841GLE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9841GLE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,263
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Product details
Overview
MPQ9841GLE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 125mΩ high-side and 115mΩ low-side MOSFETs, delivering 1A continuous output current across a 3.3V–36V input range. It features programmable 350kHz–2.5MHz switching frequency, 14μA no-load quiescent current, and power-good (PG) monitoring - optimized for automotive infotainment, ADAS camera modules, and body control units requiring high efficiency and low EMI in harsh environments.
For engineers reviewing the MPQ9841GLE-AEC1-Z datasheet, MPQ9841GLE-AEC1-Z pinout, MPQ9841GLE-AEC1-Z application, or MPQ9841GLE-AEC1-Z equivalent, this page delivers verified technical context, validated pin functions, confirmed AEC-Q100 Grade 1 compliance, exact QFN-16 (3mm×4mm) wettable flank package mapping, and real-world EMI performance data per CISPR25 Class 5.
Technical Context
The MPQ9841GLE-AEC1-Z uses peak-current-mode control with internal error amplifier and PLL-based oscillator, enabling fast transient response and stable loop compensation without external compensation components. Its dual-mode operation supports forced CCM for low-noise applications and Advanced Asynchronous Mode (AAM) for ultra-high light-load efficiency.
It integrates BST refresh logic to sustain >95% duty cycle operation, a dedicated 5V internal regulator powered from VIN or optional BIAS supply, and hiccup-mode over-current protection triggered at 2.5A high-side current limit. The PG signal asserts open-drain high when VOUT remains within ±10% of nominal regulation.
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 (36V) transients. |
| Output Current | 1A continuous - sustained under full thermal derating up to +125°C junction temperature. |
| Quiescent Current | 14μA at no load - enables >10-year battery life in always-on automotive modules. |
| Switching Frequency | 350kHz to 2.5MHz - programmable via FREQ resistor or external SYNC clock for EMI optimization and layout flexibility. |
| Feedback Reference | 0.800V ±1.5% - precision reference enabling accurate output regulation with minimal divider error sensitivity. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects against sustained overload or poor PCB heatsinking in enclosed ECUs. |
| PG Accuracy | ±10% window around VREF - provides reliable power-rail sequencing and fault detection in multi-rail systems. |
Pinout & Package
MPQ9841GLE-AEC1-Z is housed in a wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad, designed for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow processes.
| 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 power input | Accepts 3.3V–36V; requires local 10μF ceramic decoupling to minimize switching noise injection. |
| 3,10 SW | Power switch node | Internally connected high-frequency switching node driving external inductor; critical for EMI layout. |
| 4,9 PGND | Power ground return | Low-impedance return path for HS/LS MOSFET currents; must be tied to thermal pad and separated from AGND. |
| 5 EN | Enable control | Digital on/off control with 0.9V–1.2V threshold; must not be left floating to prevent erratic startup. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; logic level sets CCM (high) or AAM (low) before startup. |
| 7 PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±10% of target; requires external pull-up. |
| 8 BIAS | External bias supply | Optional 5V–18V input to reduce internal regulator loss and improve full-load efficiency by ~1.2%. |
| 11 BST | Bootstrap supply | Drives high-side gate; requires 0.1μF–1μF ceramic capacitor between BST and SW for reliable gate drive. |
| 12 VCC | Internal bias rail | 5V regulated output powering control circuitry; requires ≥1μF local decoupling to AGND. |
| 13 AGND | Analog ground reference | Reference for FB, SS, and error amplifier; must be star-connected to PGND only at single point. |
| 14 SS | Soft-start timing | 10μA current source charges external capacitor; floating defaults to 0.7ms internal soft-start. |
| 15 FB | Feedback input | Connects to resistor divider for adjustable output; fixed-output variants omit this pin's function. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets switching frequency per RFREQ = 170,000/fkHz kΩ equation. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-16 | Enables automated optical inspection of solder joints per IPC-A-610 Class 3 requirements for automotive production. |
| AEC-Q100 Grade 1 qualification | Validated for operation from −40°C to +125°C ambient, meeting stress test requirements for engine bay and cabin modules. |
| 80ns minimum on-time | Supports high VIN-to-VOUT ratios (e.g., 24V→3.3V) without pulse-skipping, maintaining regulation down to 13.8% duty cycle. |
| Hiccup-mode OCP | Shuts down and auto-retries on overcurrent, preventing thermal runaway during short-circuit faults in wiring harnesses. |
| CISPR25 Class 5 compliant | Meets stringent automotive radiated/conducted EMI limits up to 1GHz when used with recommended EMI filter layout. |
| Low-dropout BST refresh | Maintains high-side gate drive at >95% duty cycle by actively refreshing BST capacitor via low-side conduction. |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC Core Rail |
|---|---|
Use Scenario: Powers 3.3V or 5V image sensor and ISP in rear-view or surround-view cameras exposed to wide temperature swings and EMI-rich vehicle environments. IC Role / Device Role / Timing Role: Primary buck regulator supplying clean, sequenced, and monitored power to vision processor and MIPI interface. Use Value: 14μA quiescent current extends battery backup runtime; PG signal enables safe camera shutdown during ignition-off; AEC-Q100 Grade 1 ensures reliability over 15-year vehicle lifecycle. |
Use Scenario: Generates 1.1V/1.2V core voltage for ARM-based infotainment processors in head units, requiring tight regulation and low noise. IC Role / Device Role / Timing Role: High-efficiency intermediate-stage buck converter feeding downstream LDOs or POL modules. Use Value: Programmable 2.5MHz switching allows compact 1.0μH inductor; CCM mode reduces output ripple to <15mVpp, minimizing digital noise coupling into audio/video paths. |
| Body Control Unit (BCU) Subsystem | Automotive Telematics Gateway |
Use Scenario: Supplies 5V rail to CAN transceivers, LIN controllers, and EEPROM in door modules or seat control units. IC Role / Device Role / Timing Role: Robust primary DC/DC providing isolated, protected, and monitored power for distributed automotive electronics. Use Value: Hiccup OCP prevents fuse blowing during connector short circuits; wettable flank package ensures solder joint integrity during thermal cycling in under-hood locations. |
Use Scenario: Powers 3.3V domain for cellular modem, GNSS receiver, and secure MCU in 4G/5G telematics control units (TCUs). IC Role / Device Role / Timing Role: Input-stage buck converter accepting wide-range vehicle battery input while rejecting conducted noise from alternator ripple. Use Value: 36V absolute max rating withstands 30V load-dump pulses; CISPR25 Class 5 compliance eliminates need for external EMI filters in space-constrained TCU designs. |
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 |
|---|---|---|---|
| TPS62933RQWR | Lower IQ (1.2μA), but 3A output and 6V max input - lacks automotive qualification and 36V capability. | Targeted at portable industrial sensors, not automotive power rails. | Select only for non-automotive, low-IQ, low-voltage applications where AEC-Q100 is unnecessary. |
| LM61480QRNXTQ1 | Same 36V input and AEC-Q100 Grade 1, but higher 8A output and 28μA IQ - larger QFN-16 (4mm×4mm) footprint. | Used in HVAC or lighting subsystems needing higher current, not 1A camera rails. | Choose when scaling to >2A loads or requiring pin-compatible upgrade path with shared layout area. |
Compared with TPS62933RQWR and LM61480QRNXTQ1, MPQ9841GLE-AEC1-Z uniquely balances 1A capability, 14μA IQ, 36V tolerance, and wettable flank packaging - making it the only fit for space- and efficiency-constrained AEC-Q100-compliant 1A point-of-load designs.
Availability
MPQ9841GLE-AEC1-Z is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC core rails, and body control unit subsystems requiring stable component supply with full AEC-Q100 traceability and long-term automotive lifecycle support.
Supply support for MPQ9841GLE-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 MPQ9841 belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for demanding vehicular environments - emphasizing AEC-Q100 qualification, low EMI, extended temperature operation, and functional safety readiness.
FAQ
What is the maximum allowable input voltage for MPQ9841GLE-AEC1-Z?
The absolute maximum input voltage is 40V, but the recommended operating range is 3.3V to 36V. Operation above 36V risks exceeding the 36V rating specified in AEC-Q100 stress testing and may compromise long-term reliability under load-dump conditions.
Does MPQ9841GLE-AEC1-Z require an external bootstrap capacitor?
Yes - a 0.1μF to 1μF ceramic capacitor must be placed between BST and SW pins. This capacitor supplies gate drive energy for the high-side MOSFET; omission causes immediate failure to regulate due to insufficient high-side turn-on.
Can MPQ9841GLE-AEC1-Z operate in 100% duty cycle mode?
No - it supports >95% duty cycle via BST refresh logic but cannot sustain true 100% due to mandatory dead time and BST capacitor recharge requirement. At VIN ≈ VOUT, dropout behavior is managed by low-side conduction to refresh BST.
Is the PG pin active-high or open-drain?
The PG pin is strictly open-drain. It pulls low when VOUT deviates beyond ±10% of nominal; otherwise, it floats. An external pull-up resistor (typically 10kΩ to VOUT or VCC) is required to generate a valid logic-high signal for system monitoring.
How does the SYNC pin configure CCM vs. AAM modes?
SYNC must be driven low (<0.4V) or left floating *before* startup to enable AAM; driven high (>1.8V) *before* startup to force CCM. Once running, SYNC can be used for frequency synchronization, but mode selection is latched at power-on reset.
What is the thermal resistance θJA for the QFN-16 package?
The measured θJA is 48°C/W on a JESD51-7 4-layer PCB. With 2oz copper and 6 thermal vias under the exposed pad, actual board-level θJA can reach ≤32°C/W - enabling 1A continuous output at +85°C ambient without forced airflow.
Does MPQ9841GLE-AEC1-Z support adjustable output voltage?
Yes - the base MPQ9841GLE-AEC1-Z variant is adjustable via FB pin and external resistor divider. Fixed-output versions (e.g., MPQ9841GLE-33-AEC1-Z) exist but use different top marking and internal feedback network; they are not pin-compatible replacements.
MPQ9841GLE-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:
- 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:
- 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-AEC1-Z FAQ
1.How can I place an order for MPQ9841GLE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9841GLE-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 MPQ9841GLE-AEC1-Z reliable?
The price and inventory of MPQ9841GLE-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 MPQ9841GLE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9841GLE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9841GLE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9841GLE-AEC1-Z?
MPQ9841GLE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9841GLE-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 MPQ9841GLE-AEC1-Z?
For technical support, including MPQ9841GLE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9841GLE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9841GLE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9841GLE-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 MPQ9841GLE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9841GLE-AEC1-Z?
All MPQ9841GLE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9841GLE-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 MPQ9841GLE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9841GLE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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