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Monolithic Power Systems Inc. MPQ9843GLE-AEC1-Z
- Part No.:
- MPQ9843GLE-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9843GLE-AEC1-Z.pdf
- Description:
- IC REG BUCK ADJ 3A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,231
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Product details
Overview
MPQ9843GLE-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade-1 qualified, 36V input, 3A synchronous step-down DC/DC converter with integrated 125mΩ high-side and 55mΩ low-side MOSFETs, 14μA no-load quiescent current, and programmable 350kHz–2.5MHz switching frequency. It delivers high efficiency across automotive battery voltage transients (cold crank, load dump) and supports fixed or adjustable output configurations in automotive infotainment power rails.
For engineers reviewing the MPQ9843GLE-AEC1-Z datasheet, MPQ9843GLE-AEC1-Z pinout, MPQ9843GLE-AEC1-Z application in automotive power systems, or MPQ9843GLE-AEC1-Z equivalent for AEC-Q100-compliant buck converters, this page provides verified electrical parameters, validated QFN-16 pin functions, real-world EMI performance per CISPR25 Class 5, and direct substitution guidance against industry-standard alternatives.
Technical Context
The MPQ9843GLE-AEC1-Z implements peak-current-mode control with internal compensation, enabling fast transient response and stable loop behavior without external Type-II/III networks. Its dual-mode operation-selectable Forced CCM for noise-sensitive applications or Advanced Asynchronous Mode (AAM) for ultra-low IQ at light loads-is controlled via the SYNC pin prior to startup.
It integrates a precision 0.8V feedback reference (±1.5% over –40°C to +125°C), hiccup-mode over-current protection, thermal shutdown at 170°C with 20°C hysteresis, and open-drain power-good signaling with 30µs deglitch timing. The wettable flank QFN-16 package supports automated optical inspection (AOI) and enhances solder joint reliability in automotive reflow profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold crank (3.3V) and load dump (36V). |
| Continuous Output Current | 3A - sustained delivery with internal MOSFETs; no external power stage required. |
| No-Load Quiescent Current | 14μA - enables >10-year battery standby in always-on automotive modules (e.g., telematics, ADAS sensors). |
| Switching Frequency Range | 350kHz to 2.5MHz - programmable via FREQ pin resistor or external SYNC clock; avoids AM radio band and enables compact magnetics. |
| Feedback Reference Voltage | 0.800V ±1.5% - tight tolerance ensures accurate output regulation across temperature and line/load conditions. |
| Power Good Threshold Accuracy | ±5% window (85–95% rising, 79–89% falling) - provides robust rail monitoring with built-in hysteresis for noise immunity. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects die during sustained overload or poor PCB thermal design; self-recovery after cooldown. |
Pinout & Package
MPQ9843GLE-AEC1-Z is housed in a wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad, optimized for automotive thermal cycling and AOI-compatible solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures SYNC input as in-phase (PHASE = HIGH) or 180° out-of-phase (PHASE = LOW); tie to GND if unused. |
| 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; drives external inductor; high dv/dt node requiring tight layout. |
| 4,9 PGND | Power ground | High-current return path for power stage; must be connected to large copper pour with multiple vias to inner-layer ground plane. |
| 5 EN | Enable control | Active-high logic input (1.05V threshold); enables/disables regulator with 2μA shutdown current when pulled low. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz external clock; also selects AAM (SYNC <0.4V) or Forced CCM (SYNC >1.8V) before startup. |
| 7 PG | Power good indicator | Open-drain output; pulls low when VOUT deviates >10% from nominal; requires external pull-up for logic-level interface. |
| 8 BIAS | Bias supply input | Optional 5–18V external bias to reduce internal LDO losses and improve efficiency at high VIN/VOUT ratios. |
| 11 BST | Bootstrap supply | Drives HS gate; requires 0.1μF X7R ceramic capacitor between BST and SW for reliable high-side turn-on. |
| 12 VCC | Internal bias rail | Internally regulated ~5V supply; requires ≥1μF ceramic capacitor to AGND for stable gate drive and control logic. |
| 13 AGND | Analog ground | Reference for FB, SS, COMP; must be separated from PGND and joined at single point near VCC capacitor. |
| 14 SS | Soft-start timing | 10μA current source charges external capacitor; sets ramp time (e.g., 100nF = ~10ms); floating defaults to 0.7ms internal SS. |
| 15 FB | Feedback input | 0.8V reference threshold; for adjustable version, connect to resistor divider; for fixed-output variants, short to VOUT. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets fSW: 180kΩ = 475kHz, 82kΩ = 1MHz, 27kΩ = 2.5MHz (typical values per datasheet Table 1). |
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 body electronics. |
| Wettable flank QFN-16 package | Enables automated optical inspection of solder joints and improves long-term reliability under thermal shock and vibration. |
| CISPR25 Class 5 EMI compliance | Passes conducted/radiated emissions limits up to 1GHz with standard EMI filter (per Figure 14), reducing system-level filtering cost. |
| 80ns minimum on-time | Supports high duty-cycle operation (e.g., 5V-out from 5.5V-in), critical for low-VIN automotive applications like USB-C PD power paths. |
| Hiccup-mode over-current protection | Shuts down and auto-restarts on sustained overload, preventing thermal runaway while maintaining system fault visibility via PG signal. |
| External soft-start programmability | Adjustable start-up slew rate prevents inrush current damage to input capacitors and upstream FETs in multi-rail systems. |
Applications
| Automotive Infotainment Power | ADAS Camera Module Supply |
|---|---|
|
Use Scenario: Powers SoC, display driver, and audio codec in head-unit systems with wide input voltage swings (6V–16V battery). IC Role / Device Role / Timing Role: Primary 5V/3.3V buck regulator delivering 3A continuous current with AEC-Q100 reliability and low EMI. Use Value: Eliminates need for external MOSFETs and reduces BOM count by 7 parts vs. controller-based solution; meets CISPR25 Class 5 without shielding. |
Use Scenario: Supplies image sensor and ISP in rear-view or surround-view cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: High-efficiency 3.3V rail generator with 14μA quiescent current for always-on wake-up functionality. Use Value: Enables >15-year battery-backed operation in parking mode; thermal shutdown at 170°C prevents field failure during hot soak. |
| Telematics Control Unit (TCU) | Automotive Gateway ECU |
|
Use Scenario: Provides isolated 3.3V domain for cellular modem, GNSS receiver, and CAN transceivers in connected vehicle platforms. IC Role / Device Role / Timing Role: Input-filtered buck stage accepting 9–36V unregulated battery input with precise PG signaling for system sequencing. Use Value: PG output synchronizes firmware boot with stable 3.3V rail; 2.5MHz switching allows use of 1.0×1.0mm inductors for ultra-compact layout. |
Use Scenario: Generates 5V rail for microcontroller, Ethernet PHY, and LIN transceivers in central gateway ECUs managing multiple vehicle domains. IC Role / Device Role / Timing Role: Synchronized buck converter operating at 1MHz to avoid interference with CAN FD (5Mbps) and Ethernet AVB signals. Use Value: SYNC pin enables deterministic switching alignment across multiple MPQ9843 devices, minimizing aggregate EMI peaks in multi-rail systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54360B-Q1 | Higher 60V max VIN, but 15μA IQ and no wettable flank; uses SOIC-8 package with higher θJA (60°C/W). | Preferred for 48V mild-hybrid systems; less suitable for space-constrained modules requiring AOI. | Select when input voltage exceeds 36V or SOIC-8 footprint is acceptable; verify thermal margin with θJA = 60°C/W. |
| LM61480-Q1 | Lower 3.5A rating, 12μA IQ, and integrated PMBus telemetry; QFN-16 but non-wettable flank; supports spread-spectrum. | Better for diagnostics-heavy applications (e.g., OTA-updatable ECUs); lacks CISPR25 Class 5 validation data. | Choose when digital monitoring or spread-spectrum EMI reduction is mandatory; confirm test reports meet your OEM's EMC requirements. |
Compared with TPS54360B-Q1 and LM61480-Q1, MPQ9843GLE-AEC1-Z offers superior thermal performance (θJA = 48°C/W), factory-validated CISPR25 Class 5 compliance, and wettable flank packaging-making it optimal for compact, high-reliability automotive modules where AOI and board-level EMI certification are critical.
Availability
MPQ9843GLE-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment power, ADAS camera module supply, and telematics control unit (TCU) applications requiring stable component supply, AEC-Q100 traceability, and production-ready EMI compliance.
Supply support for MPQ9843GLE-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 controllers.
The MPQ9843 belongs to MPS's automotive-grade power management portfolio, designed specifically for harsh-environment applications demanding AEC-Q100 qualification, extended temperature operation, and certified EMI performance in safety-critical vehicle subsystems.
FAQ
What is the maximum allowable input voltage for MPQ9843GLE-AEC1-Z?
The absolute maximum input voltage is 40V, but the recommended operating range is 3.3V to 36V. Operation above 36V risks exceeding safe power dissipation limits under high ambient temperatures, especially with minimal PCB copper area. The device includes internal over-voltage clamp circuitry that activates only during transient events-not steady-state operation.
Does MPQ9843GLE-AEC1-Z require external compensation components?
No external compensation is required. The MPQ9843GLE-AEC1-Z uses internal Type-II compensation with fixed poles/zeros optimized for stability with standard 4.7μH–10μH inductors and 22μF–47μF output capacitors. This eliminates tuning effort and reduces layout sensitivity compared to controller-based solutions.
How does the wettable flank feature benefit automotive manufacturing?
The wettable flank design exposes vertical side-wall metallization on all perimeter pins, enabling automated optical inspection (AOI) of solder fillet quality post-reflow. This significantly improves first-pass yield and field reliability in high-volume automotive assembly, where voided or insufficient solder joints are leading causes of latent failures.
Can MPQ9843GLE-AEC1-Z operate with a 3.3V input to generate 3.3V output?
Yes, it supports 100% duty cycle operation due to its 80ns minimum on-time and low dropout characteristics. When VIN ≈ VOUT, the device enters dropout mode and maintains regulation by maximizing high-side FET conduction time-verified down to VIN = 3.3V for VOUT = 3.3V at 3A load per Figure 10 in the datasheet.
Is the BIAS pin mandatory for operation?
No. The BIAS pin is optional: connecting it to a clean 5–18V supply reduces internal LDO losses and improves efficiency at high input voltages (e.g., VIN = 24V → VOUT = 3.3V). If unused, BIAS may be left floating or tied to PGND without functional impact.
What is the purpose of the PHASE pin, and how should it be used in multi-phase designs?
The PHASE pin configures the internal oscillator's phase relationship to the external SYNC signal-HIGH for in-phase, LOW for 180° out-of-phase. In dual-MPQ9843 systems, setting opposite PHASE states enables interleaved operation, cutting input/output ripple current by up to 50% and relaxing filter component requirements.
How is power-good (PG) timing validated across temperature?
PG deglitch timing is guaranteed at 30µs (rising) and 50µs (falling) over –40°C to +125°C, with thresholds specified as percentages of VREF (e.g., 85–95% for rising edge). These values are characterized and binned during AEC-Q100 stress testing-not just room-temperature typicals-ensuring robust sequencing in extreme environments.
MPQ9843GLE-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:
- 3A
- 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)
MPQ9843GLE-AEC1-Z FAQ
1.How can I place an order for MPQ9843GLE-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9843GLE-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 MPQ9843GLE-AEC1-Z reliable?
The price and inventory of MPQ9843GLE-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 MPQ9843GLE-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9843GLE-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9843GLE-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9843GLE-AEC1-Z?
MPQ9843GLE-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9843GLE-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 MPQ9843GLE-AEC1-Z?
For technical support, including MPQ9843GLE-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9843GLE-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9843GLE-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9843GLE-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 MPQ9843GLE-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9843GLE-AEC1-Z?
All MPQ9843GLE-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9843GLE-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 MPQ9843GLE-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9843GLE-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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