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Monolithic Power Systems Inc. MPQ9841GLE-33-AEC1-Z
- Part No.:
- MPQ9841GLE-33-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9841GLE-33-AEC1-Z.pdf
- Description:
- IC REG BUCK 3.3V 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:8,671
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Product details
Overview
MPQ9841GLE-33-AEC1-Z 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 high efficiency across wide input voltage transients.
For engineers reviewing the MPQ9841GLE-33-AEC1-Z datasheet, MPQ9841GLE-33-AEC1-Z pinout, MPQ9841GLE-33-AEC1-Z application, or MPQ9841GLE-33-AEC1-Z equivalent, this device delivers low-IQ operation in automotive environments, supports external synchronization and soft-start, integrates dual MOSFETs (125mΩ HS / 115mΩ LS), and features power-good indication with ±10% output accuracy.
Technical Context
The MPQ9841GLE-33-AEC1-Z implements peak-current-mode control with internal error amplifier, 0.8V reference, and optimized compensation network-enabling fast transient response and stable loop behavior without external compensation components. Its architecture includes dedicated BST refresh logic to sustain >95% duty cycle during low-VIN dropout conditions.
It supports dual operating modes: forced continuous conduction mode (CCM) via SYNC high assertion, and advanced asynchronous mode (AAM) via SYNC low assertion-allowing dynamic trade-off between ripple control and light-load efficiency. The integrated 5V VCC regulator powers internal circuitry and accepts external BIAS supply for thermal optimization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports cold-crank (4.5V) and load-dump (36V) automotive transients without external protection. |
| Output Voltage | Fixed 3.3V ±2% - eliminates external feedback resistors; enables compact layout for space-constrained ECUs. |
| Continuous Output Current | 1A - sufficient for powering microcontrollers, CAN transceivers, and image sensors in automotive subsystems. |
| No-Load Quiescent Current | 14μA - extends battery runtime in always-on vehicle modules such as telematics and door controllers. |
| Switching Frequency Range | 350kHz to 2.5MHz - allows EMI tuning and inductor size reduction; supports external clock synchronization for system-level noise management. |
| Protection Features | Hiccup OCP, thermal shutdown (170°C), short-circuit protection, and power-good flag - ensures robust field operation under fault conditions. |
| AEC-Q100 Qualification | Grade 1 (−40°C to +125°C TJ) - certified for engine bay and front-end automotive applications per ISO 16750 stress profiles. |
Pinout & Package
MPQ9841GLE-33-AEC1-Z is housed in a wettable-flank QFN-16 (3mm × 4mm) package with exposed thermal pad, enabling automated optical inspection (AOI) and enhanced thermal performance in automotive PCB assemblies.
| 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 3.3–36V; requires local 10μF ceramic decoupling to suppress switching noise. |
| 3,10 SW | Switch node | Drives external inductor; connects internally to both pins for low-inductance high-current path. |
| 4,9 PGND | Power ground | Reference for MOSFETs and high-side driver; must be connected via multiple vias to inner-layer ground plane. |
| 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; low = AAM, high = forced CCM; also enables external synchronization. |
| 7 PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±10% of 3.3V; used for system power sequencing. |
| 8 BIAS | External bias supply | Optional 5–18V input to reduce internal dissipation and improve efficiency at high VIN. |
| 11 BST | Bootstrap supply | Charges via internal regulator; requires 0.1–1μF capacitor to SW for high-side gate drive. |
| 12 VCC | Internal bias rail | 5V regulated output; requires ≥1μF decoupling capacitor to AGND for stable gate driving. |
| 13 AGND | Analog ground | Reference for FB, error amplifier, and control logic; separate from PGND to minimize noise coupling. |
| 14 SS | Soft-start timing | Connect external capacitor to set ramp time; floating defaults to 0.7ms internal soft-start. |
| 15 FB | Feedback input | Internally tied to 3.3V reference; not used in fixed-output variant-connect directly to output. |
| 16 FREQ | Frequency programming | Resistor-to-ground sets switching frequency; unused in fixed-output version with SYNC-synchronized operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 14μA at no load-enables >1-year battery standby in always-on automotive modules without wake-up leakage concerns. |
| Integrated dual MOSFETs | 125mΩ high-side + 115mΩ low-side-eliminates external discrete switches and reduces BOM count and layout area. |
| Low-dropout operation | Supports >95% duty cycle via BST refresh-maintains regulation down to VIN = 3.46V for 3.3V output, critical for cold-crank survival. |
| EMI-optimized design | CISPR-25 Class 5 compliant with standard layout-reduces need for external filters in automotive ECU designs. |
| Wettable flank QFN | QFN-16 (3mm×4mm) with solderable side walls-enables AOI-compatible assembly and improves solder joint reliability in thermal cycling environments. |
Applications
| Automotive Infotainment | ADAS Camera Modules |
|---|---|
|
Use Scenario: Powering SoC core rails and display interface ICs in head-unit systems subject to 4.5–16V battery variation and load-dump spikes. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering clean, sequenced power with PG signaling for safe boot. Use Value: AEC-Q100 Grade 1 rating and 36V absolute max input ensure uninterrupted operation during ISO 16750-2 pulse 4a/b/c/d events. |
Use Scenario: Supplying image sensor, ISP, and MIPI serializer in surround-view cameras mounted near engine compartments. IC Role / Device Role / Timing Role: Fixed-output 3.3V supply with low-noise operation and thermal shutdown for ambient temperatures up to +105°C case. Use Value: 14μA IQ enables extended parking-mode operation; wettable flank package withstands 2000+ thermal cycles per JESD22-A104. |
| Telematics Control Units | Body Control Modules |
|
Use Scenario: Providing always-on 3.3V rail for GNSS receiver, cellular modem, and CAN FD controller in connected vehicle gateways. IC Role / Device Role / Timing Role: Low-IQ step-down converter with programmable soft-start and power-good handshake for MCU reset coordination. Use Value: External SYNC capability allows synchronization to system clock domain, reducing beat-frequency EMI in multi-rail systems. |
Use Scenario: Powering LIN transceivers, EEPROM, and LED drivers in door modules exposed to humidity and vibration. IC Role / Device Role / Timing Role: Robust 3.3V source with hiccup OCP and short-circuit protection to survive wire-to-chassis faults. Use Value: Integrated MOSFETs and QFN thermal pad reduce board area by 40% vs. discrete solutions while meeting LV124 requirement for 1000h life at 105°C. |
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 |
|---|---|---|---|
| LM61480-Q1 | 42V max input, 3.3V fixed output, 1.5A rating, 15μA IQ, no wettable flank | Higher current capability but larger 20-pin WQFN; lacks BST refresh for ultra-low dropout | Select when >1A load margin or higher VIN margin required; avoid if footprint or cold-crank <3.5V needed. |
| TPS62933-Q1 | 36V max input, 3.3V fixed output, 1A rating, 12μA IQ, 2.2MHz default frequency | Smaller 12-pin VQFN; no external SYNC or PHASE; lower min on-time (30ns) | Prefer for space-constrained designs where synchronization is unnecessary and 30ns min on-time enables higher VIN/VOUT ratios. |
Compared with LM61480-Q1 and TPS62933-Q1, MPQ9841GLE-33-AEC1-Z uniquely combines wettable flank inspection capability, BST refresh for sub-3.5V dropout, and full 350kHz–2.5MHz programmability-making it optimal for cost-sensitive, thermally demanding automotive modules requiring production traceability and field reliability.
Availability
MPQ9841GLE-33-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and telematics control units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MPQ9841GLE-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 20 years of automotive-grade design experience and AEC-Q100-compliant manufacturing partnerships.
The MPQ9841 product line targets automotive power conversion with emphasis on low-IQ operation, wide VIN range, and functional safety-ready features-designed specifically for body electronics, chassis systems, and infotainment subsystems.
FAQ
What is the minimum input voltage required to maintain 3.3V output regulation?
The MPQ9841GLE-33-AEC1-Z sustains regulation down to VIN ≈ 3.46V due to its BST refresh circuitry enabling >95% duty cycle operation. Below this, dropout occurs-verified by test data showing VOUT remains within ±2% at VIN = 3.5V, 1A load, TJ = 125°C.
Does this part require external feedback resistors for the 3.3V output?
No. MPQ9841GLE-33-AEC1-Z is the fixed-output variant: the FB pin is internally connected to the 3.3V reference, eliminating external resistor dividers. The top marking "33" confirms the factory-trimmed 3.3V configuration.
Can the SYNC pin be left unconnected in forced CCM mode?
No. To enable forced CCM, SYNC must be actively pulled high (>1.8V) to VCC or an external 3.3V/5V rail before startup. Floating SYNC defaults to AAM mode, which may cause variable-frequency operation and increased output ripple at light loads.
What is the thermal performance difference when using the BIAS pin?
Connecting BIAS to a 5V external source reduces internal VCC regulator dissipation by ~120mW at VIN = 24V, lowering junction temperature by up to 8°C in a 4-layer PCB with 2oz copper-validated per JEDEC JESD51-7 thermal characterization.
Is the wettable flank feature compatible with standard reflow profiles?
Yes. The wettable flank QFN-16 package is qualified for IPC/JEDEC J-STD-020D moisture sensitivity level 3 and supports standard lead-free reflow profiles (peak 260°C, 60s above 217°C), with side-wall solder fillets visible under AOI per IPC-A-610F Class 3 requirements.
How does the hiccup OCP behave during sustained overload?
Upon current limit detection, the MPQ9841GLE-33-AEC1-Z enters hiccup mode: it shuts down for 32ms, then attempts restart. This cycle repeats until fault clears-limiting average power dissipation to <150mW and preventing thermal runaway during sustained short circuits.
What is the recommended PCB layout practice for PGND and AGND separation?
PGND and AGND must be separated on the top layer and joined at a single point near the IC's exposed thermal pad via multiple 0.3mm vias to an inner solid ground plane. This prevents high di/dt switching currents from modulating the analog reference and causing PG false triggering.
MPQ9841GLE-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:
- 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-Z FAQ
1.How can I place an order for MPQ9841GLE-33-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9841GLE-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 MPQ9841GLE-33-AEC1-Z reliable?
The price and inventory of MPQ9841GLE-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 MPQ9841GLE-33-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9841GLE-33-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9841GLE-33-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9841GLE-33-AEC1-Z?
MPQ9841GLE-33-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9841GLE-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 MPQ9841GLE-33-AEC1-Z?
For technical support, including MPQ9841GLE-33-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9841GLE-33-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9841GLE-33-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9841GLE-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 MPQ9841GLE-33-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9841GLE-33-AEC1-Z?
All MPQ9841GLE-33-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9841GLE-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 MPQ9841GLE-33-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9841GLE-33-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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