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Monolithic Power Systems Inc. MPQ9841GLE-5-AEC1-Z
- Part No.:
- MPQ9841GLE-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9841GLE-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,784
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Product details
Overview
MPQ9841GLE-5-AEC1-Z from Monolithic Power Systems is a 36V, 1A synchronous step-down DC/DC converter with fixed 5V output, AEC-Q100 Grade 1 qualification, 14μA no-load quiescent current, and programmable 350kHz–2.5MHz switching frequency. It integrates 125mΩ high-side and 115mΩ low-side MOSFETs in a QFN-16 (3mm×4mm) wettable flank package, designed for automotive infotainment power rails requiring stable 5V supply under wide input transients.
For engineers reviewing the MPQ9841GLE-5-AEC1-Z datasheet, MPQ9841GLE-5-AEC1-Z pinout, MPQ9841GLE-5-AEC1-Z application, or MPQ9841GLE-5-AEC1-Z equivalent, this device delivers automotive-grade reliability, ultra-low IQ operation for battery-sustained systems, precise ±10% power-good signaling, and selectable forced CCM/AAM modes for ripple vs. efficiency trade-off optimization.
Technical Context
The MPQ9841GLE-5-AEC1-Z uses peak-current-mode control with internal error amplifier, 0.8V reference, and optimized compensation to enable fast transient response and simplified loop stability. Its integrated BST refresh circuit supports >95% duty cycle operation by actively refreshing the bootstrap capacitor during low-VBST conditions.
It implements dual-mode operation: forced continuous conduction mode (CCM) when SYNC is pulled high pre-startup, or advanced asynchronous mode (AAM) with power-save mode (PSM) when SYNC is pulled low-enabling <14μA quiescent current at no load while maintaining regulated 5V output across -40°C to +125°C junction temperature.
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) events |
| Output voltage | Fixed 5.0V ±1% - eliminates external feedback resistors; enables plug-and-play integration into 5V logic subsystems |
| Continuous output current | 1A - sufficient for powering microcontrollers, CAN transceivers, and sensor interfaces in ADAS ECUs |
| No-load quiescent current | 14μA - extends battery life in always-on vehicle modules such as telematics and body controllers |
| Switching frequency range | 350kHz to 2.5MHz - allows EMI-sensitive placement near RF receivers and compact filter design with small inductors |
| Power good accuracy | ±10% of nominal VOUT - provides reliable system reset and sequencing control for downstream processors |
| AEC-Q100 grade | Grade 1 (-40°C to +125°C TJ) - qualified for engine bay and front-end module mounting locations |
Pinout & Package
MPQ9841GLE-5-AEC1-Z is housed in a thermally enhanced QFN-16 (3mm × 4mm) package with wettable flank leads for automated optical solder-joint inspection in automotive production lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures 0° or 180° phase alignment with external clock; tie to GND if unused to prevent floating |
| 2 VIN | Main input supply | Accepts 3.3–36V; requires local 10μF ceramic decoupling to suppress switching noise on main rail |
| 3,10 SW | Switch node | High-frequency switching point connecting internal HS/LS FETs; must be routed with minimal loop area for EMI control |
| 4,9 PGND | Power ground | Return path for high-current switching; requires dedicated copper pour and multiple thermal vias to inner ground planes |
| 5 EN | Enable control | Digital ON/OFF control with 0.9–1.2V threshold; must be actively driven-never left floating |
| 6 SYNC | Frequency sync & mode select | Enables external clock synchronization or selects CCM (high) / AAM (low) before startup |
| 7 PG | Open-drain power good | Asserts high when VOUT is within ±10% of 5V; requires external pull-up for MCU reset or sequencing logic |
| 8 BIAS | External bias supply | Optional 5–18V input to reduce internal regulator loss and improve efficiency above 12V VIN |
| 11 BST | Bootstrap supply | Drives high-side gate via 0.1–1μF capacitor to SW; critical for >90% duty cycle operation |
| 12 VCC | Internal bias rail | 5V regulated supply for control circuitry; requires ≥1μF local decoupling to AGND |
| 13 AGND | Analog ground | Reference for FB, SS, and error amplifier; must be isolated from PGND except at single-point star ground |
| 14 SS | Soft-start timing | Connects to external capacitor for adjustable startup ramp; floating defaults to 0.7ms internal soft-start |
| 15 FB | Feedback input | Internally tied to 5V regulation; not used in fixed-output variant-leave unconnected per datasheet |
| 16 FREQ | Frequency programming | Resistor-to-ground sets switching frequency; omitted in fixed-output version-pin left open or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-16 package | Enables AOI-compatible solder-joint inspection required for automotive ASIL-B functional safety compliance |
| AEC-Q100 Grade 1 qualification | Validated for operation from -40°C to +125°C junction temperature in harsh automotive environments |
| Hiccup-mode over-current protection | Shuts down and auto-retries on sustained overload-prevents thermal runaway during short-circuit faults |
| Low-dropout BST refresh | Maintains high-side gate drive at >95% duty cycle, enabling 5V output from inputs as low as 5.3V |
| CISPR25 Class 5 EMI compliance | Meets stringent automotive radiated/conducted emissions limits up to 1GHz with standard EMI filters |
Applications
| Automotive Infotainment | ADAS Camera Module |
|---|---|
|
Use Scenario: Powering SoC, display interface, and audio codec in head-unit systems exposed to 12V battery fluctuations and thermal cycling. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering clean, sequenced, and monitored power to digital subsystems. Use Value: Fixed 5V output eliminates resistor tolerance errors; PG signal enables safe boot sequencing; AEC-Q100 ensures lifetime reliability in dashboard environments. |
Use Scenario: Supplying image sensor, ISP, and MIPI serializer in forward-facing camera modules operating behind windshield glass. IC Role / Device Role / Timing Role: High-efficiency 5V source with ultra-low IQ to maintain wake-on-vision functionality during vehicle sleep mode. Use Value: 14μA quiescent current minimizes parasitic drain; wettable flank package supports automated optical inspection for zero-defect manufacturing. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Regulating 5V rail for LIN transceivers, door lock actuators, and ambient lighting drivers in centralized body electronics. IC Role / Device Role / Timing Role: Robust, fault-tolerant DC/DC converter handling load-dump transients and reverse-battery protection via external components. Use Value: 36V max input withstands ISO 7637-2 pulse 5a; hiccup OCP prevents latch-up during solenoid inductive kickback events. |
Use Scenario: Providing always-on 5V supply to cellular modem, GNSS receiver, and secure element in connected vehicle gateways. IC Role / Device Role / Timing Role: Low-noise, low-IQ power stage supporting LTE/NR modem sleep states and rapid network reacquisition. Use Value: Programmable frequency avoids interference with cellular bands; ±10% PG window ensures deterministic modem reset behavior. |
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, but higher 25μA IQ and no wettable flank package | Higher current capability suits multi-rail systems; lacks AOI-ready leads for high-reliability automotive assembly | Select when >1A load margin is required and optical inspection is not mandated by OEM process control plan |
| TPS62933QRNCRQ1 | 1.5A, 36V, 15μA IQ, but only AEC-Q100 Grade 2 (–40°C to +105°C) and no BST refresh for low dropout | Lower thermal rating limits use in under-hood locations; reduced duty-cycle capability affects 5V-from-6V operation | Prefer for cabin-mounted modules where ambient temperature stays below 85°C and input never drops below 6.5V |
Compared with MPQ4420AGL-AEC1-Z and TPS62933QRNCRQ1, the MPQ9841GLE-5-AEC1-Z uniquely combines AEC-Q100 Grade 1, wettable flank packaging, 14μA IQ, and active BST refresh-making it optimal for space-constrained, thermally demanding, and zero-defect automotive 5V power nodes.
Availability
MPQ9841GLE-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics control units requiring stable component supply with full AEC-Q100 traceability and long-term lifecycle support.
Supply support for MPQ9841GLE-5-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 over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting solutions.
The MPQ9841 product line targets automotive power management applications requiring AEC-Q100 qualification, ultra-low quiescent current, and robust EMI performance-designed specifically for next-generation E/E architectures with distributed 5V domains.
FAQ
What is the purpose of the PHASE pin on MPQ9841GLE-5-AEC1-Z?
The PHASE pin selects whether the internal switching node aligns in-phase (PHASE = high) or 180° out-of-phase (PHASE = low) with an external SYNC clock. This enables interleaving with other converters to reduce input/output ripple. If synchronization is unused, PHASE must be tied to PGND to prevent noise coupling and ensure stable operation.
Can MPQ9841GLE-5-AEC1-Z operate with input voltage below 5V?
No. The absolute minimum input voltage is 3.3V, but the device cannot sustain 5V output below ~5.3V input due to BST capacitor charging limitations and MOSFET RDS(on) losses. For sub-5.5V applications, use the MPQ9841GLE-33-AEC1-Z (3.3V fixed) or a buck-boost topology.
Is external feedback required for the fixed 5V version?
No. The MPQ9841GLE-5-AEC1-Z has internal feedback set to 5.0V ±1%. Pin 15 (FB) is internally connected to the regulation node and must remain unconnected-no external resistors or capacitors are needed, reducing BOM count and PCB area.
How does the BIAS pin improve efficiency?
When an external 5–18V supply is applied to BIAS, the internal 5V regulator bypasses VIN, eliminating its dropout loss and associated heat generation. This improves full-load efficiency by up to 2.5% at VIN = 24V and reduces die temperature-critical for high-density automotive layouts.
What thermal derating applies at 125°C ambient?
At TA = 125°C, the maximum continuous output current is reduced to ~650mA due to θJA = 48°C/W and TJ(MAX) = 150°C. Derating curves in Figure 7 of the datasheet confirm 1A operation is valid only up to TA ≈ 95°C with standard 4-layer PCB layout and 2oz copper.
Does MPQ9841GLE-5-AEC1-Z support spread-spectrum frequency modulation?
No. The device supports only fixed-frequency PWM or synchronized operation via external clock on the SYNC pin. Spread-spectrum modulation is not implemented; EMI reduction relies on programmable frequency selection, optimized layout, and external CISPR25-compliant filters as shown in Figure 14.
What failure modes trigger thermal shutdown?
Thermal shutdown activates at TJ = 170°C ±10°C and holds until junction temperature falls by ≥20°C (hysteresis). It is independent of over-current events-hiccup-mode OCP responds to peak switch current exceeding 2.5A, while thermal shutdown protects against sustained power dissipation exceeding 2.6W in QFN-16 package.
MPQ9841GLE-5-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):
- 5V
- 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-5-AEC1-Z FAQ
1.How can I place an order for MPQ9841GLE-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9841GLE-5-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-5-AEC1-Z reliable?
The price and inventory of MPQ9841GLE-5-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-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9841GLE-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9841GLE-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9841GLE-5-AEC1-Z?
MPQ9841GLE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9841GLE-5-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-5-AEC1-Z?
For technical support, including MPQ9841GLE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9841GLE-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9841GLE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9841GLE-5-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-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9841GLE-5-AEC1-Z?
All MPQ9841GLE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9841GLE-5-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-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9841GLE-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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