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Monolithic Power Systems Inc. MPQ9843GLE-AEC1-P
- Part No.:
- MPQ9843GLE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9843GLE-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 3A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,190
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Product details
Overview
MPQ9843GLE-AEC1-P from Monolithic Power Systems is a 36V, 3A synchronous step-down DC/DC converter with AEC-Q100 Grade-1 qualification, 14μA no-load quiescent current, and programmable 350kHz–2.5MHz switching frequency. It integrates 125mΩ high-side and 55mΩ low-side MOSFETs in a QFN-16 (3mm×4mm) wettable flank package, enabling compact automotive power rails for ADAS camera modules, infotainment head units, and body control modules.
For engineers reviewing the MPQ9843GLE-AEC1-P datasheet, MPQ9843GLE-AEC1-P pinout, MPQ9843GLE-AEC1-P application, or MPQ9843GLE-AEC1-P equivalent, key selection criteria include its AEC-Q100 Grade-1 compliance, 80ns minimum on-time for high-duty-cycle operation, hiccup-mode over-current protection, and support for external synchronization and soft-start-critical for automotive EMI-constrained designs.
Technical Context
The MPQ9843GLE-AEC1-P employs peak-current-mode control with internal compensation, delivering fast transient response and stable loop behavior across wide input (3.3V–36V) and junction temperature (−40°C to +125°C) ranges. Its dual-mode operation-selectable forced CCM or Advanced Asynchronous Mode (AAM)-enables high efficiency from full load down to microamp-level quiescent conditions.
Integrated power FETs, a precision 800mV feedback reference (±2% over temperature), open-drain power-good (PG) output with 10% window, and robust protection suite-including hiccup OCP, short-circuit protection, thermal shutdown (170°C), and UVLO with 400mV hysteresis-support reliable operation in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (down to 3.3V) and load-dump transients (up to 36V). |
| Output Current | 3A continuous - sufficient for powering multiple SoCs, sensors, or display drivers in Tier-1 automotive subsystems. |
| Quiescent Current | 14μA at no load - enables >1-year battery standby in always-on vehicle modules without compromising runtime. |
| Switching Frequency | 350kHz to 2.5MHz - programmable via resistor or external sync clock, allowing EMI optimization and small external component selection. |
| Feedback Reference | 800mV ±2% - high-accuracy reference enables tight output regulation (±1%) across temperature and line/load variations. |
| Min On-Time | 80ns - supports high step-down ratios (e.g., 24V→3.3V at 90% duty cycle) without pulse-skipping instability. |
| Protection Features | Hiccup OCP, SCP, thermal shutdown, UVLO - ensures fault containment and system-level safety per ISO 26262 ASIL-B supporting functions. |
Pinout & Package
MPQ9843GLE-AEC1-P is housed in a thermally enhanced, wettable-flank QFN-16 package (3mm × 4mm, 0.5mm pitch), optimized for automated optical inspection (AOI) and high-reliability automotive solder joint integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures SYNC input phase alignment (in-phase or 180° out-of-phase); tie to GND if unused to prevent floating. |
| 2 VIN | Main power input | Supplies control circuitry and high-side switch; requires local 10μF ceramic decoupling to PGND for EMI suppression. |
| 3,10 SW | Switch node | Internal connection point of HS/LS FETs; critical for layout-minimize loop area to reduce radiated emissions. |
| 4,9 PGND | Power ground | High-current return path for power stage; must be connected via multiple vias to inner-layer ground plane. |
| 5 EN | Enable control | Active-high logic input (1.05V threshold); enables precise sequencing with external MCU or power manager. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; also selects CCM (high) or AAM (low) before startup-no external components needed. |
| 7 PG | Power-good indicator | Open-drain output asserting when VOUT is within ±10% of target; used for downstream supply enable or fault monitoring. |
| 8 BIAS | Efficiency-boost bias rail | Optional 5V–18V external supply reduces IC power loss and improves light-load efficiency; float if unused. |
| 11 BST | Bootstrap supply | Drives high-side gate; requires 0.1μF ceramic capacitor between BST and SW for reliable HS-FET turn-on. |
| 12 VCC | Internal bias regulator output | Provides regulated ~5V for control logic; requires ≥1μF ceramic decoupling to AGND. |
| 13 AGND | Analog ground reference | Separate low-noise ground for FB, SS, and error amplifier; must be star-connected to PGND at single point. |
| 14 SS | Soft-start timing | 10μA current source charges external capacitor; sets controlled ramp-up time to limit inrush current during power-on. |
| 15 FB | Feedback input | Monitors output voltage via resistor divider (for adjustable version) or direct connection (fixed-output variants). |
| 16 FREQ | Frequency programming | Resistor-to-GND sets switching frequency: 180kΩ = ~475kHz, 82kΩ = ~1MHz, 27kΩ = ~2.5MHz. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Rated for −40°C to +125°C junction operation with full characterization and stress testing per automotive reliability standards. |
| Wettable flank QFN-16 package | Enables automated solder-joint inspection (AOI) and improves solder fillet visibility for zero-defect manufacturing in automotive lines. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load switching losses by skipping pulses while maintaining regulation-achieving >85% efficiency at 1mA output. |
| 80ns minimum on-time | Permits high-duty-cycle operation (e.g., 24V→5V at 20.8%) without instability, critical for post-buck intermediate rails. |
| Integrated 125mΩ/55mΩ MOSFETs | Eliminates external power devices, reducing BOM count, PCB area, and thermal design complexity in space-constrained ECUs. |
| EMI-optimized architecture | Meets CISPR-25 Class 5 conducted/radiated limits with standard layout and minimal external filtering-verified per test report. |
Applications
| ADAS Camera Module Power | Infotainment Head Unit Core Rail |
|---|---|
|
Use Scenario: Powers image sensor, ISP, and interface logic in rear-view or surround-view cameras exposed to engine bay temperatures. IC Role / Device Role / Timing Role: Primary 3.3V/5V buck regulator supplying noise-sensitive analog and digital blocks with tight ripple (<15mVpp) and fast load-step response. Use Value: AEC-Q100 Grade-1 rating and −40°C to +125°C operation ensure uninterrupted function during thermal cycling; 14μA IQ extends battery backup duration during vehicle sleep mode. |
Use Scenario: Generates stable 1.1V core voltage for application processors and 3.3V I/O rail for touch controllers and audio codecs in center-stack displays. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with programmable frequency to avoid AM band interference and meet CISPR-25 Class 5 EMI requirements. Use Value: 350kHz–2.5MHz frequency tuning allows layout optimization for smallest possible inductor/capacitor size; wettable flank package ensures IPC-A-610 Class 3 solder joint reliability. |
| Body Control Module (BCM) Subsystem | Automotive Telematics Unit (TCU) |
|
Use Scenario: Supplies 5V rail to LIN transceivers, LED drivers, and microcontroller peripherals in door modules and lighting control units. IC Role / Device Role / Timing Role: Robust step-down regulator handling wide input swings (6V–16V nominal, up to 36V during load dump) with integrated OCP and thermal shutdown. Use Value: Hiccup-mode OCP prevents latch-up during shorted outputs; 80ns min on-time supports 12V→5V conversion at >40% duty cycle without dropout under heavy load. |
Use Scenario: Provides isolated 3.3V supply for cellular modem, GNSS receiver, and CAN FD controller in connected vehicle telematics gateways. IC Role / Device Role / Timing Role: Automotive-grade DC/DC with PG signal for safe power sequencing and external SYNC for synchronized multi-rail switching to suppress beat frequencies. Use Value: Open-drain PG output interfaces directly with modem reset logic; SYNC pin enables deterministic phase alignment across multiple MPQ9843s to minimize system-level EMI peaks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | Higher 4.5A rating, fixed 2.1MHz frequency, no external frequency programming; 17μA IQ | Requires larger inductor for same ripple; lacks AAM mode-lower light-load efficiency than MPQ9843's 14μA | Select when higher output current or fixed-frequency simplicity outweighs IQ and flexibility needs. |
| TPS62933-Q1 | 3A rating, 1.8V–14V input, 25μA IQ, supports DCS-Control topology; no wettable flank package | Not rated for 36V input-unsuitable for 24V commercial vehicle systems or load-dump survival | Prefer only for 12V-only passenger car applications where ultra-low noise (not ultra-low IQ) is primary. |
Compared with LM61480-Q1 and TPS62933-Q1, MPQ9843GLE-AEC1-P uniquely balances 36V input tolerance, 14μA IQ, programmable frequency, AEC-Q100 Grade-1, and wettable flank packaging-making it optimal for cost-sensitive, space-constrained, and thermally demanding automotive subsystems requiring long-term reliability.
Availability
MPQ9843GLE-AEC1-P is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment head units, and body control modules requiring stable component supply, AEC-Q100 compliance, and production-ready wettable flank packaging.
Supply support for MPQ9843GLE-AEC1-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 MPQ9843 belongs to MPS's automotive-qualified DC/DC converter product line, engineered specifically for demanding vehicle subsystems requiring extended temperature operation, low EMI, and functional safety support-targeting ASIL-B capable power architectures.
FAQ
What is the maximum allowable input voltage for MPQ9843GLE-AEC1-P?
The absolute maximum input voltage is 40V, but the recommended operating range is 3.3V to 36V. Operation at 36V is validated for automotive load-dump conditions per ISO 7637-2 Pulse 5a, and the device maintains regulation and protection functionality across this full range without derating.
Does MPQ9843GLE-AEC1-P support fixed-output voltage versions?
Yes-MPQ9843GLE-5-AEC1 is the 5V fixed-output variant. The MPQ9843GLE-AEC1-P itself is the adjustable version, requiring an external resistor divider on the FB pin to set output voltage; the feedback reference is precisely 800mV with ±2% tolerance over temperature.
How is the wettable flank feature implemented in the QFN-16 package?
The wettable flank design exposes vertical side-wall metallization on all perimeter pins, enabling automated optical inspection (AOI) of solder fillets during reflow. This meets IPC-A-610 Class 3 requirements and is verified per JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) handling guidelines.
Can MPQ9843GLE-AEC1-P operate without the BIAS pin connected?
Yes-the BIAS pin may be left floating or tied to PGND. When unconnected, the internal VCC regulator powers all circuitry. Connecting an external 5V–18V supply to BIAS reduces power dissipation in the IC and improves light-load efficiency by bypassing the internal LDO, especially beneficial above 1A load.
What is the purpose of the PHASE pin, and is it required for basic operation?
The PHASE pin selects whether the internal oscillator synchronizes in-phase or 180° out-of-phase with the external SYNC clock. It is optional: tie to GND for default 180° offset or leave unconnected only if precise phase alignment across multiple converters is unnecessary for EMI reduction.
How does the hiccup-mode over-current protection behave during a sustained short circuit?
Upon detecting over-current, the MPQ9843GLE-AEC1-P disables switching, waits a fixed recovery interval (~500μs), then attempts restart. If the fault persists, it repeats the hiccup cycle-limiting average power dissipation and preventing thermal runaway while maintaining visibility of the fault condition via PG deassertion.
Is the MPQ9843GLE-AEC1-P qualified for use in ASIL-B systems?
While not ASIL-B certified as a standalone component, the MPQ9843GLE-AEC1-P's AEC-Q100 Grade-1 qualification, comprehensive protection features (OCP, SCP, thermal shutdown), and failure-in-time (FIT) data support its use in ASIL-B safety goals when integrated into a properly architected system with appropriate diagnostics and redundancy.
MPQ9843GLE-AEC1-P 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-P FAQ
1.How can I place an order for MPQ9843GLE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9843GLE-AEC1-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 MPQ9843GLE-AEC1-P reliable?
The price and inventory of MPQ9843GLE-AEC1-P 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-P is usually 5 days.
3.What payment methods are accepted for MPQ9843GLE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9843GLE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9843GLE-AEC1-P?
MPQ9843GLE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9843GLE-AEC1-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 MPQ9843GLE-AEC1-P?
For technical support, including MPQ9843GLE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9843GLE-AEC1-P requirements.
6.How does Aetrix verify that MPQ9843GLE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ9843GLE-AEC1-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 MPQ9843GLE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ9843GLE-AEC1-P?
All MPQ9843GLE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9843GLE-AEC1-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 MPQ9843GLE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ9843GLE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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