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Monolithic Power Systems Inc. MPQ9843GLE-5-AEC1-Z
- Part No.:
- MPQ9843GLE-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9843GLE-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 3A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,734
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Product details
Overview
MPQ9843GLE-5-AEC1-Z from Monolithic Power Systems is a 36V, 3A, AEC-Q100 Grade-1 qualified synchronous step-down converter with fixed 5V output, 14μA no-load quiescent current, and programmable 350kHz–2.5MHz switching frequency. It integrates 125mΩ high-side and 55mΩ low-side MOSFETs and delivers regulated power in automotive infotainment, ADAS camera modules, and body control units under wide input transients.
For engineers reviewing the MPQ9843GLE-5-AEC1-Z datasheet, MPQ9843GLE-5-AEC1-Z pinout, MPQ9843GLE-5-AEC1-Z application, or MPQ9843GLE-5-AEC1-Z equivalent, key selection criteria include AEC-Q100 Grade-1 qualification, wettable flank QFN-16 package for automated optical inspection, 5V fixed output with ±1% reference accuracy, and hiccup-mode over-current protection with thermal shutdown.
Technical Context
The MPQ9843GLE-5-AEC1-Z uses peak-current-mode control with internal error amplifier and PLL-based oscillator, enabling fast transient response and stable loop compensation across temperature and line/load variations. Its selectable forced CCM or AAM operation allows design flexibility between light-load efficiency and EMI predictability.
It supports external synchronization (350kHz–2.5MHz), programmable soft-start via SS pin, and precision power-good monitoring with 30µs deglitch timing. The integrated BST driver enables high-side gate drive with external bootstrap capacitor, while BIAS pin allows external 5–18V bias supply to reduce dissipation.
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) events. |
| Output Voltage | Fixed 5V ±1% - eliminates external feedback resistors; simplifies layout and improves stability in noise-sensitive systems. |
| Continuous Output Current | 3A - sustained delivery without derating at TJ ≤ 125°C with proper PCB copper and thermal vias. |
| No-Load Quiescent Current | 14μA - enables >10-year battery life in always-on automotive modules (e.g., telematics wake-up circuits). |
| Switching Frequency Range | 350kHz to 2.5MHz - allows EMI optimization and compact magnetics; programmable via FREQ pin resistor or external SYNC clock. |
| Protection Features | Hiccup OCP, thermal shutdown (170°C), short-circuit protection, and UVLO with 150mV hysteresis - ensures robust fault recovery in harsh environments. |
| AEC-Q100 Qualification | Grade-1 (−40°C to +125°C junction) - validated for engine bay, transmission, and front-end ADAS applications. |
Pinout & Package
MPQ9843GLE-5-AEC1-Z is housed in a wettable flank QFN-16 (3mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced solder joint reliability in automotive reflow processes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures in-phase or 180° out-of-phase sync; tie to GND if unused to prevent floating. |
| 2 VIN | Main input supply | Accepts 3.3–36V; requires local 10μF ceramic decoupling to PGND for EMI suppression. |
| 3,10 SW | Switch node | Internally connected high-frequency switching node; critical for layout-minimize loop area with inductor and BST cap. |
| 4,9 PGND | Power ground | High-current return path for MOSFETs; must be solid copper pour with multiple thermal vias to inner layers. |
| 5 EN | Enable control | Active-high logic input (0.9–1.2V threshold); supports controlled sequencing in multi-rail systems. |
| 6 SYNC | Frequency sync & mode select | Enables external clock sync or selects AAM (low) vs. forced CCM (high) before startup. |
| 7 PG | Power good indicator | Open-drain output asserting when VOUT is within ±10% of 5V; requires external pull-up for system monitoring. |
| 8 BIAS | External bias supply | Optional 5–18V input to reduce internal LDO loss and improve full-load efficiency by ~2%. |
| 11 BST | Bootstrap supply | Drives high-side gate; requires 0.1μF X7R ceramic capacitor between BST and SW. |
| 12 VCC | Internal bias rail | Regulated ~5V supply for control circuitry; requires ≥1μF ceramic decoupling to AGND. |
| 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; floating defaults to 0.7ms internal soft-start. |
| 15 FB | Feedback input | Internally tied to 5V output for fixed version; not used externally-no external divider required. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets switching frequency (e.g., 180kΩ = 475kHz typical); enables EMI band steering. |
Key Features
| Feature | Design Value |
|---|---|
| Wettable flank QFN-16 | Enables AOI-compatible solder joint inspection-critical for zero-defect automotive manufacturing. |
| AEC-Q100 Grade-1 qualification | Validated for −40°C to +125°C operation with extended reliability testing (HTOL, TC, UHAST). |
| 14μA no-load IQ | Reduces standby power in always-on ECUs; achieves >90% efficiency at 1mA load in AAM mode. |
| 80ns minimum on-time | Supports high VIN-to-VOUT ratios (e.g., 24V→5V at 2.2MHz) without pulse-skipping instability. |
| Hiccup-mode over-current protection | Auto-retries after fault clearance-prevents latch-up during intermittent short circuits in wiring harnesses. |
| Programmable soft-start (SS) | Prevents inrush current into downstream capacitors; external capacitor sets ramp time (e.g., 10nF = 100ms). |
Applications
| Automotive Infotainment Display | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Powers LCD backlight drivers and SoC I/O rails in head-unit displays exposed to 12V battery fluctuations and thermal cycling. IC Role / Device Role / Timing Role: Primary 5V point-of-load regulator delivering stable 3A with fast line transient response (<5µs) to maintain display integrity during ignition pulses. Use Value: AEC-Q100 qualification and 36V input rating ensure uninterrupted operation during load-dump events up to 36V/400ms. |
Use Scenario: Supplies image sensor and ISP core voltage in forward-facing radar/camera fusion modules mounted near engine compartments. IC Role / Device Role / Timing Role: Fixed 5V buck converter with thermal shutdown and hiccup OCP protecting against connector shorts and condensation-induced faults. Use Value: 14μA quiescent current extends battery backup runtime during vehicle sleep mode; wettable flank package ensures solder joint reliability at 125°C ambient. |
| Body Control Unit (BCU) | Automotive Telematics Gateway |
|
Use Scenario: Regulates power for LIN transceivers, door lock actuators, and ambient lighting controllers in centralized BCU designs. IC Role / Device Role / Timing Role: High-efficiency 5V source supporting burst-mode communication; operates in AAM to minimize idle power in parked state. Use Value: Programmable 350kHz–2.5MHz switching frequency avoids AM radio band interference (530–1710kHz) in cabin electronics. |
Use Scenario: Powers cellular modem, GNSS receiver, and CAN FD interface in embedded telematics control units requiring always-on connectivity. IC Role / Device Role / Timing Role: Primary 5V supply with PG signal enabling host MCU to validate power integrity before initializing secure boot sequence. Use Value: Power-good assertion with 30µs deglitch prevents false resets during brief input dips; BIAS pin option improves efficiency under 2A continuous load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM61480-Q1 | 42V max input, 5A output, 15μA IQ, but requires external compensation and lacks wettable flank package. | Higher current capability suits larger ECUs; less suitable for space-constrained camera modules due to larger SOIC-8 package. | Select when >3A output or higher VIN margin is needed; avoid if AOI inspection or QFN-16 footprint is mandatory. |
| TPS62933-Q1 | 36V input, 3A, 12μA IQ, 2.2MHz fixed frequency, but no SYNC input or programmable FREQ pin. | Better light-load efficiency in ultra-low-power telematics; lacks frequency tuning for EMI compliance in complex board layouts. | Prefer for cost-sensitive, fixed-frequency designs where EMI filtering is pre-validated; skip if sync-to-system-clock or spread-spectrum capability is required. |
Compared with LM61480-Q1 and TPS62933-Q1, the MPQ9843GLE-5-AEC1-Z uniquely combines wettable flank QFN-16, programmable frequency with SYNC, and AEC-Q100 Grade-1 validation in a single 5V fixed-output solution-reducing BOM count and layout risk in safety-critical automotive subsystems.
Availability
MPQ9843GLE-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and body control units requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ9843GLE-5-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 leadership in DC/DC conversion and motor driver technology.
The MPQ9843 belongs to MPS's automotive-grade power management portfolio, designed specifically for demanding vehicular environments requiring AEC-Q100 qualification, low IQ, and robust transient immunity.
FAQ
What is the purpose of the BIAS pin on MPQ9843GLE-5-AEC1-Z?
The BIAS pin accepts an external 5–18V supply to power the internal gate drivers and control circuitry, reducing power dissipation in the internal LDO and improving full-load efficiency by up to 2%. When unused, it must be floated or tied to GND-never left unconnected.
How does the PHASE pin affect synchronization behavior?
The PHASE pin selects whether the internal switching node aligns in-phase or 180° out-of-phase with the external SYNC clock. Pulling PHASE high enables in-phase operation; pulling low selects 180° phase shift. If unused, connect to GND to prevent noise coupling and ensure deterministic startup.
Can MPQ9843GLE-5-AEC1-Z operate with input voltage below 3.3V?
No. The absolute minimum operating input voltage is 3.3V per datasheet specifications. Below this, the device enters undervoltage lockout (UVLO) and disables switching. It is not rated for cold-crank events below 3.3V-designers must ensure upstream supply conditioning or use a wider-input alternative.
What is the function of the SS pin when using the fixed 5V version?
The SS pin remains fully functional in the fixed-output version: it sources a precise 10μA current to charge an external capacitor, controlling soft-start ramp time. Floating SS activates the internal 0.7ms soft-start. This prevents inrush current into downstream 5V bus capacitance regardless of output configuration.
Is the PG signal active-high or open-drain?
The PG pin is strictly open-drain. It pulls low when VOUT is within ±10% of 5V and floats otherwise. An external pull-up resistor (typically 10–100kΩ to 3.3V or 5V) is mandatory to generate a logic-high signal for host monitoring. No internal pull-up exists.
Does MPQ9843GLE-5-AEC1-Z support spread-spectrum frequency modulation?
No. The MPQ9843GLE-5-AEC1-Z does not implement spread-spectrum modulation. It supports only fixed-frequency operation (via FREQ resistor) or external clock synchronization (SYNC pin). EMI reduction relies on programmable frequency selection outside sensitive bands and optimized PCB layout.
How is thermal performance affected by the wettable flank package?
The wettable flank feature does not alter thermal resistance (θJA = 48°C/W on 4-layer JEDEC board), but enables reliable AOI detection of solder fillet formation-reducing field failures from voided or insufficient solder joints in high-vibration automotive applications where thermal cycling induces mechanical stress.
MPQ9843GLE-5-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):
- 5V
- Voltage - Output (Max):
- -
- 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-5-AEC1-Z FAQ
1.How can I place an order for MPQ9843GLE-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9843GLE-5-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-5-AEC1-Z reliable?
The price and inventory of MPQ9843GLE-5-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-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9843GLE-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9843GLE-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9843GLE-5-AEC1-Z?
MPQ9843GLE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9843GLE-5-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-5-AEC1-Z?
For technical support, including MPQ9843GLE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9843GLE-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9843GLE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9843GLE-5-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-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9843GLE-5-AEC1-Z?
All MPQ9843GLE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9843GLE-5-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-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9843GLE-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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