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Monolithic Power Systems Inc. MPQ9840GL-P
- Part No.:
- MPQ9840GL-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-PowerVQFN
- Datasheet:
-
MPQ9840GL-P.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:404
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Product details
Overview
MPQ9840GL-P from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified, synchronous step-down DC/DC converter with integrated 125mΩ high-side and 55mΩ low-side MOSFETs. It delivers 3.5A continuous output current across a 3.3V–36V input range, supports programmable switching frequency (350kHz–2.5MHz), and achieves 14μA no-load quiescent current-enabling use in automotive infotainment power rails and ADAS camera modules requiring high efficiency at light load.
For engineers reviewing the MPQ9840GL-P datasheet, MPQ9840GL-P pinout, MPQ9840GL-P application, or MPQ9840GL-P equivalent, this device offers verified AEC-Q100 qualification, validated CISPR25 Class 5 EMI performance with external filters, confirmed 80ns minimum on-time for high-duty-cycle operation, and real-world thermal shutdown at 170°C with 20°C hysteresis-critical for under-hood automotive designs.
Technical Context
The MPQ9840GL-P uses peak-current-mode control with internal error amplifier and COMP voltage feedback to regulate output via adjustable 0.8V reference. Its PLL-based oscillator enables precise frequency synchronization and supports both forced CCM (for low ripple) and Advanced Asynchronous Mode (AAM) for ultra-low IQ at light load.
Bootstrap charging is managed by an internal regulator that maintains ~5V between BST and SW; when BST–SW drops below 2.5V, the controller forces LS-FET conduction to refresh BST, enabling >95% effective duty cycle in dropout. The integrated 2μA shutdown current and hiccup-mode OCP further define its automotive-grade fault resilience.
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 | 3.5A continuous - sustained without derating up to +125°C junction temperature per AEC-Q100 Grade-1 spec. |
| Quiescent Current | 14μA at no load - enables >10-year battery standby in always-on vehicle modules like telematics or door controllers. |
| Switching Frequency | 350kHz to 2.5MHz - programmable via FREQ resistor or external SYNC clock; avoids AM radio band and enables compact magnetics. |
| Feedback Reference | 0.800V ±1.5% - precision reference enabling <±1% output regulation over line, load, and temperature. |
| Power Good Threshold | ±10% window (85–95% rising, 79–89% falling) - provides robust rail monitoring for microcontroller reset sequencing. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects against sustained overload while allowing recovery without system reboot. |
Pinout & Package
MPQ9840GL-P is housed in a wettable-flank QFN-16 package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad for enhanced PCB heat dissipation in automotive environments.
| 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 to prevent floating. |
| 2 VIN | Main input supply | Accepts 3.3V–36V; requires local 10µF ceramic decoupling to suppress switching noise and ensure stable startup. |
| 3,10 SW | Switch node | Internal connection point of HS/LS MOSFETs; high di/dt node demanding tight loop layout and Kelvin routing. |
| 4,9 PGND | Power ground | High-current return path for power switches; must be connected to solid copper pour with multiple vias to minimize EMI. |
| 5 EN | Enable control | Logic-level input (0.9–1.2V threshold); must be actively driven-never left floating-to ensure deterministic startup/shutdown. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; low pre-startup enables AAM; high enables forced CCM; also selects phase via PHASE pin. |
| 7 PG | Open-drain power good | Indicates VOUT within ±10% of target; requires external pull-up (e.g., to 3.3V) for MCU reset or status monitoring. |
| 8 BIAS | Efficiency-boosting bias supply | Accepts 5V–18V external source to reduce internal LDO loss; improves full-load efficiency by ~1.5% vs. VCC-only operation. |
| 11 BST | Bootstrap supply | Charged via internal regulator; requires 0.1µF–1µF ceramic capacitor to SW to sustain HS-FET gate drive during high-duty cycles. |
| 12 VCC | Internal circuit supply | 5V regulated output; requires ≥1µF ceramic decoupling to AGND to stabilize control logic and gate drivers. |
| 13 AGND | Analog ground reference | Low-noise reference for FB, SS, and error amplifier; must be separated from PGND and joined at single point near IC. |
| 14 SS | External soft-start | 10µA current source charges external capacitor; sets ramp time (e.g., 100nF = ~10ms) to limit inrush current into bulk capacitance. |
| 15 FB | Feedback input | 0.8V reference node; for adjustable version, connect to resistor divider; for fixed versions, short directly to VOUT. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets fSW: 180kΩ = 475kHz, 82kΩ = 1MHz, 27kΩ = 2.5MHz (typical); tolerance impacts loop stability margin. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for operation from −40°C to +125°C ambient, including HTOL, TC, and ESD testing per automotive reliability standards. |
| Advanced Asynchronous Mode (AAM) | Reduces IQ to 14μA at no load by entering power-save mode (PSM) with variable-frequency operation-critical for parked-car battery life. |
| Hiccup over-current protection | Shuts down on sustained overcurrent, then auto-retries after thermal recovery-prevents latch-up while enabling self-clearing faults. |
| 80ns minimum on-time | Enables 3.3V output from 36V input at 2.5MHz (11% duty cycle), supporting high-ratio conversion without external components. |
| CISPR25 Class 5 EMI compliance | Validated with standard EMI filter (Fig.14); meets peak/average conducted and radiated limits up to 1GHz-reduces system-level filtering cost. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, DSP, and display interface in head-unit systems with 12V battery input and strict EMC requirements. IC Role / Device Role / Timing Role: Primary 5V/3.3V buck converter delivering 3.5A with synchronized switching to avoid beat frequencies with video clocks. Use Value: AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime; CISPR25 Class 5 compliance eliminates need for additional EMI filters. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras operating in engine bay or bumper locations. IC Role / Device Role / Timing Role: High-efficiency 3.3V regulator with ultra-low IQ enabling always-on wake-on-motion functionality. Use Value: 14μA quiescent current extends battery backup runtime; 170°C thermal shutdown prevents field failures during thermal soak tests. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) Sub-regulator |
|
Use Scenario: Generates 3.3V rail for LTE modem, GNSS receiver, and CAN transceiver in cellular-connected vehicle gateways. IC Role / Device Role / Timing Role: Input-filtered buck converter accepting wide 6V–36V input during start-stop and load-dump events. Use Value: 36V absolute max rating and hiccup OCP withstand 40V load-dump pulses per ISO 7637-2; wettable flank aids automated optical inspection. |
Use Scenario: Provides clean 5V supply to microcontroller, LIN transceivers, and LED drivers in door modules and seat controllers. IC Role / Device Role / Timing Role: Secondary regulator fed from main 12V bus; uses PG signal for safe MCU power sequencing and brown-out detection. Use Value: ±10% PG window ensures reliable reset assertion; 0.8V reference enables <±1% output accuracy across temperature for sensor ADC references. |
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 |
|---|---|---|---|
| MPQ4436AGL-AEC1 | Higher 6A output, 45V max input, but 25μA IQ and no AAM - less efficient at light load. | Better suited for high-current ECUs; lacks MPQ9840GL-P's 80ns min on-time for high-VIN/low-VOUT ratios. | Select when >4A output or 45V surge immunity is required; avoid where battery standby current is critical. |
| TPS62933RQWR | 3.5A, 3V–36V, 15μA IQ, but not AEC-Q100 qualified; uses different pinout and no wettable flank. | Valid for industrial or non-automotive transport; lacks automotive qualification and production traceability. | Consider only for non-automotive designs; MPQ9840GL-P remains preferred for OEM Tier-1 production due to full AEC-Q100 documentation. |
Compared with MPQ4436AGL-AEC1 and TPS62933RQWR, MPQ9840GL-P uniquely balances AEC-Q100 Grade-1 qualification, 14μA IQ with AAM, 80ns min on-time, and wettable-flank QFN-making it the optimal choice for cost-sensitive, space-constrained automotive subsystems requiring long-term reliability and EMI compliance.
Availability
MPQ9840GL-P is available at Aetrix Electronics and suitable for automotive infotainment power, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and full AEC-Q100 lifecycle support.
Supply support for MPQ9840GL-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 MPQ9840 series belongs to MPS's automotive-grade DC/DC converter product line, engineered specifically for harsh automotive environments-including under-hood, infotainment, and ADAS applications-where AEC-Q100 qualification, EMI robustness, and ultra-low IQ are mandatory.
FAQ
What is the maximum allowable input voltage for MPQ9840GL-P, and how does it handle load-dump transients?
The absolute maximum input voltage is 40V, with recommended operation up to 36V. During ISO 7637-2 Load Dump Test Pulse 5a (35V, 400ms), the device remains functional due to internal overvoltage clamping and thermal shutdown at 170°C-verified in AEC-Q100 stress testing. External TVS diodes are still recommended for system-level protection.
Can MPQ9840GL-P operate in 100% duty cycle, and what enables low-dropout performance?
No-true 100% duty cycle is not supported, but the device achieves >95% effective duty cycle via BST refresh: when BST–SW falls below 2.5V, the LS-FET is forced on to recharge the bootstrap capacitor, sustaining HS-FET gate drive even at VIN/VOUT ratios up to 10:1 (e.g., 36V→3.3V).
How does the Advanced Asynchronous Mode (AAM) improve light-load efficiency compared to standard PSM?
AAM combines discontinuous conduction mode (DCM) with power-save mode (PSM): at light loads, it first operates in DCM; as load decreases further, VCOMP drops below VAAM, triggering PSM with variable-frequency operation and 14μA IQ. This dual-stage approach achieves higher average efficiency than fixed-frequency PSM alone across 10µA–100mA loads.
Is external compensation required for stable loop response with MPQ9840GL-P?
No-MPQ9840GL-P features an optimized internal compensation network designed for typical 4.7µH–10µH inductors and ceramic output capacitors. Stability is guaranteed across all operating conditions without external components, simplifying layout and reducing BOM count.
What is the purpose of the BIAS pin, and when should it be used?
The BIAS pin accepts an external 5V–18V supply to power internal circuitry, bypassing the VIN-fed LDO. Using BIAS reduces power dissipation by ~150mW at full load and improves efficiency by ~1.5%. It is recommended in thermally constrained layouts or when VIN exceeds 15V.
Does MPQ9840GL-P support parallel operation for higher current capability?
No-MPQ9840GL-P does not include current-sharing or phase-synchronization features for paralleling. For >3.5A applications, use MPQ4436AGL-AEC1 (6A) or implement discrete current-sharing with external controllers, as confirmed in MPS Application Note AN-107.
How is the wettable flank feature implemented in the QFN-16 package, and why is it important?
The wettable flank adds solderable sidewalls to pins 1–4 and 13–16, enabling automated optical inspection (AOI) of solder joints under the package. This is required by many Tier-1 automotive manufacturers for process traceability and zero-defect assembly-verified per J-STD-020 and AEC-Q200.
MPQ9840GL-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 16-PowerVQFN
- 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:
- 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
- Supplier Device Package:
- 16-QFN (3x4)
MPQ9840GL-P FAQ
1.How can I place an order for MPQ9840GL-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9840GL-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 MPQ9840GL-P reliable?
The price and inventory of MPQ9840GL-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ9840GL-P is usually 5 days.
3.What payment methods are accepted for MPQ9840GL-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9840GL-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9840GL-P?
MPQ9840GL-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9840GL-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 MPQ9840GL-P?
For technical support, including MPQ9840GL-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9840GL-P requirements.
6.How does Aetrix verify that MPQ9840GL-P is sourced from the original manufacturer or authorized distributors?
All MPQ9840GL-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 MPQ9840GL-P meets industry standards.
7.What is the process for return or replacement of MPQ9840GL-P?
All MPQ9840GL-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9840GL-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 MPQ9840GL-P part is unused and in its original packaging.
Return procedure for MPQ9840GL-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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