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Monolithic Power Systems Inc. MPQ9842GLE-33-AEC1-Z
- Part No.:
- MPQ9842GLE-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9842GLE-33-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.3V 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,975
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Product details
Overview
MPQ9842GLE-33-AEC1-Z from Monolithic Power Systems is a 36V, 2A, AEC-Q100 Grade-1 qualified synchronous step-down converter with fixed 3.3V output, 14μA no-load quiescent current, 350kHz–2.5MHz programmable switching frequency, and integrated 125mΩ/55mΩ MOSFETs. It delivers high efficiency in automotive front-end power rails and battery-powered ADAS modules requiring stable low-noise 3.3V supply under wide input transients.
For engineers reviewing the MPQ9842GLE-33-AEC1-Z datasheet, MPQ9842GLE-33-AEC1-Z pinout, MPQ9842GLE-33-AEC1-Z application, or MPQ9842GLE-33-AEC1-Z equivalent, key selection criteria include AEC-Q100 Grade-1 qualification, 3.3V ±2.5% output accuracy over -40°C to +125°C, hiccup-mode OCP, PG signal timing (30μs deglitch), and wettable flank QFN-16 package for automated optical inspection.
Technical Context
The MPQ9842GLE-33-AEC1-Z uses peak-current-mode control with internal error amplifier and 0.8V reference for precise regulation. Its dual-mode operation-selectable forced CCM or Advanced Asynchronous Mode (AAM)-enables deterministic EMI behavior at full load and ultra-low 14μA IQ in sleep mode during light/no-load conditions.
It integrates bootstrap refresh logic to sustain >95% duty cycle operation down to 3.3V output from 3.3V input, supported by BST UVLO monitoring and LS-FET conduction for capacitor recharge. The 80ns minimum on-time and 5V internal VCC regulator (with optional BIAS pin bypass) ensure robust startup and transient response across automotive cold-crank (4.5V) to load-dump (40V) conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports automotive battery rail including cold-crank (≥4.5V) and load-dump (≤40V absolute max) |
| Output Voltage | Fixed 3.3V ±2.5% - factory-trimmed for precision; eliminates external resistor divider in space-constrained designs |
| Continuous Output Current | 2A - sustained at TJ ≤ 125°C with QFN-16 (3mm×4mm) package and proper PCB copper thermal relief |
| No-Load Quiescent Current | 14μA - enables >1-year battery standby in always-on vehicle modules without compromising wake-up latency |
| Switching Frequency Range | 350kHz to 2.5MHz - programmable via FREQ pin resistor or external SYNC clock; avoids AM/FM radio bands and enables compact magnetics |
| Power Good Accuracy | ±5% window (85–95% rising / 79–89% falling of VREF) - ensures reliable system reset sequencing with 30μs deglitch filtering |
| Thermal Shutdown Threshold | 170°C with 20°C hysteresis - protects against sustained overload while allowing brief peak-power bursts in engine bay environments |
Pinout & Package
MPQ9842GLE-33-AEC1-Z is housed in a wettable flank QFN-16 (3mm × 4mm, 0.5mm pitch) package optimized for automotive reflow and AOI inspection. Thermal pad exposed on bottom connects to PCB ground plane for enhanced heat dissipation.
| 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 3.3–36V; requires local 10µF ceramic decoupling to PGND to suppress switching noise |
| 3,10 SW | Switch node | Internal connection point of HS/LS MOSFETs; must be routed with minimal loop area to reduce EMI radiation |
| 4,9 PGND | Power ground | High-current return path for power switches; requires dedicated copper pour and multiple vias to thermal pad |
| 5 EN | Enable control | Digital input with 0.9–1.2V threshold; drives device into 2µA shutdown when pulled low |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; low pre-startup enables AAM, high enables forced CCM |
| 7 PG | Open-drain power good | Asserts low when VOUT deviates >10% from nominal; requires external pull-up for microcontroller monitoring |
| 8 BIAS | Efficiency-boosting bias supply | Accepts 5–18V external source to reduce internal LDO losses; float or tie to GND if unused |
| 11 BST | Bootstrap supply | Charged via internal regulator; requires 0.1–1µF ceramic cap between BST and SW for HS gate drive |
| 12 VCC | Internal circuit supply | 5V regulated output; needs ≥1µF decoupling to AGND; powered by BIAS if connected |
| 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 | 10µA current source charges external capacitor; sets inrush current limit and startup time |
| 15 FB | Feedback input | Internally connected to 3.3V output in fixed-version; no external divider required |
| 16 FREQ | Frequency programming | Resistor-to-ground sets fSW per RFREQ = 170kΩ/fSW(kHz); open for default ~500kHz |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for operation from −40°C to +125°C junction temperature in automotive powertrain and chassis systems |
| Wettable flank QFN-16 package | Enables automated optical inspection of solder joints for zero-defect manufacturing in Tier-1 automotive assembly lines |
| Hiccup-mode over-current protection | Shuts down and auto-retries on sustained overload, preventing thermal runaway during short-circuit events in wiring harnesses |
| 80ns minimum on-time | Supports high-step-down ratios (e.g., 24V→3.3V at 500kHz) without pulse-skipping instability |
| Low dropout BST refresh | Maintains regulation down to VIN = VOUT + 0.5V by actively refreshing bootstrap charge during light-load DCM/PSM |
| CISPR 25 Class 5 compliant EMI | Meets stringent automotive radiated/conducted emissions limits up to 1GHz with standard layout and EMI filters |
Applications
| ADAS Camera Module Power | Automotive Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Dual-camera fusion module requiring clean, low-noise 3.3V for image sensor I/O and ISP interface under stop-start engine cycling. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering 2A peak current with <10mVpp ripple; PG signal sequences FPGA configuration after power stabilization. Use Value: 14μA IQ extends parking-mode battery life; AAM mode eliminates audible coil whine during idle; wettable flank package ensures solder joint reliability in vibration-prone mounting locations. |
Use Scenario: Powering ARM Cortex-A76 application processor core logic and DDR4 I/O in head-unit with dynamic voltage scaling. IC Role / Device Role / Timing Role: Fixed-output 3.3V supply with fast transient response (<10µs recovery from 1A step load); SYNC pin synchronized to SoC clock tree to minimize beat-frequency noise. Use Value: Programmable 2.5MHz switching enables use of 1.0µH inductors, reducing board area by 40% vs. 500kHz design; BIAS pin connection lowers thermal rise by 12°C at full load. |
| Telematics Control Unit (TCU) CAN Interface | Electric Power Steering (EPS) Sensor Bias Supply |
|
Use Scenario: Isolated 3.3V rail for CAN FD transceiver and MCU in cellular-connected TCU operating across 5V–36V battery range. IC Role / Device Role / Timing Role: Input-conditioned 3.3V source with UVLO hysteresis (150mV) rejecting battery ripple; PG signal validates power before enabling CAN PHY. Use Value: 36V max input withstands load-dump transients; hiccup OCP prevents latch-up during CAN bus short circuits; QFN thermal performance sustains 2A output at +105°C ambient. |
Use Scenario: Precision 3.3V bias for torque and position sensors in EPS motor control unit exposed to under-hood temperatures. IC Role / Device Role / Timing Role: AEC-Q100-compliant point-of-load regulator with ±2.5% output accuracy over full temp range; SS pin controls startup slew rate to avoid sensor initialization faults. Use Value: 170°C thermal shutdown with 20°C hysteresis prevents damage during thermal soak testing; low dropout operation maintains regulation during cranking dips to 6V. |
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 | 36V, 2A, but only 20μA IQ; no wettable flank; fixed 3.3V option available | Lacks AAM mode and BST refresh; lower efficiency below 100mA load | Select when cost sensitivity outweighs light-load efficiency and AOI requirements |
| TPS543B20RTWR | 36V, 3A, 15μA IQ; PMBus interface; no AEC-Q100 Grade-1 rating | Requires external compensation; lacks hiccup OCP and wettable flank | Choose for digital power management in non-safety-critical industrial systems needing telemetry |
Compared with MPQ4420AGL-AEC1-Z, the MPQ9842GLE-33-AEC1-Z delivers 30% lower light-load IQ and guaranteed AOI compatibility; versus TPS543B20RTWR, it provides automotive-grade reliability and simplified analog design at the expense of configurability.
Availability
MPQ9842GLE-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment SoC power rails, and telematics control units requiring stable component supply with AEC-Q100 traceability and long-term production support.
Supply support for MPQ9842GLE-33-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 technology for automotive, industrial, and computing markets.
The MPQ9842 belongs to MPS's AEC-Q100-qualified automotive power management portfolio, engineered specifically for harsh-environment step-down regulation in safety-critical vehicle subsystems where reliability, thermal resilience, and EMI robustness are mandatory.
FAQ
What is the maximum allowable input voltage for continuous operation?
The MPQ9842GLE-33-AEC1-Z supports continuous operation up to 36V input. Its absolute maximum rating is 40V, but sustained operation above 36V risks exceeding thermal limits and violating AEC-Q100 stress conditions. Design margin should maintain VIN ≤ 36V under worst-case load-dump transients.
Does the fixed 3.3V version require external feedback resistors?
No. The MPQ9842GLE-33-AEC1-Z has an internally trimmed 3.3V reference and direct FB-to-output connection. Pin 15 (FB) must be connected directly to the output node-no external resistor divider is needed, reducing BOM count and layout sensitivity.
How does the wettable flank feature improve manufacturability?
The wettable flank design exposes vertical side-wall metallization on all QFN leads, enabling automated optical inspection (AOI) of solder fillet quality. This eliminates reliance on X-ray for hidden-joint verification and reduces field failure rates in high-vibration automotive applications.
Can the SYNC pin be left unconnected during normal operation?
No. SYNC must be either driven high (>1.8V) for forced CCM, driven low (<0.4V) for AAM, or connected to a valid 350kHz–2.5MHz clock. Leaving SYNC floating causes undefined mode selection and may result in erratic switching or startup failure due to noise coupling.
What is the purpose of the BIAS pin, and when should it be used?
The BIAS pin accepts an external 5–18V supply to power internal circuitry, bypassing the VIN-to-VCC LDO. Use it when VIN > 12V to reduce power dissipation and junction temperature by up to 15°C at full load-critical for high-ambient under-hood applications.
Is the PG signal active-high or open-drain?
The PG pin is an open-drain output. It pulls low when VOUT is within ±10% of 3.3V and floats otherwise. An external pull-up resistor (typically 10kΩ to 3.3V or 5V) is required to generate a logic-high signal for microcontroller monitoring or power sequencing.
How is soft-start time determined when both internal and external capacitors are used?
The MPQ9842GLE-33-AEC1-Z implements a dual soft-start: internal 0.7ms timer and external SS capacitor charged by 10µA current. The longer of the two times dominates-so external capacitor values >700pF extend soft-start beyond 0.7ms, limiting inrush current more aggressively.
MPQ9842GLE-33-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):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- 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)
MPQ9842GLE-33-AEC1-Z FAQ
1.How can I place an order for MPQ9842GLE-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-Z reliable?
The price and inventory of MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9842GLE-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9842GLE-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9842GLE-33-AEC1-Z?
MPQ9842GLE-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-Z?
For technical support, including MPQ9842GLE-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9842GLE-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9842GLE-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9842GLE-33-AEC1-Z?
All MPQ9842GLE-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9842GLE-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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