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Monolithic Power Systems Inc. MPQ9840GLE-5-AEC1-Z
- Part No.:
- MPQ9840GLE-5-AEC1-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9840GLE-5-AEC1-Z.pdf
- Description:
- IC REG BUCK 5V 3.5A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:6,097
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Product details
Overview
MPQ9840GLE-5-AEC1-Z from Monolithic Power Systems is a 36V, 3.5A synchronous step-down DC/DC converter with fixed 5V output, AEC-Q100 Grade-1 qualification, 14μA no-load quiescent current, and programmable switching frequency from 350kHz to 2.5MHz. It integrates 125mΩ high-side and 55mΩ low-side MOSFETs in a QFN-16 (3mm×4mm) wettable flank package, designed for automotive power rails requiring high efficiency across wide input ranges (3.3V–36V) and robust thermal performance up to +125°C junction temperature.
For engineers reviewing the MPQ9840GLE-5-AEC1-Z datasheet, MPQ9840GLE-5-AEC1-Z pinout, MPQ9840GLE-5-AEC1-Z application in automotive ADAS or infotainment power supplies, or MPQ9840GLE-5-AEC1-Z equivalent for AEC-Q100-compliant 5V buck conversion, this page delivers verified electrical parameters, validated pin functions, real-world EMI performance (CISPR25 Class 5), and precise selection guidance against qualified alternatives.
Technical Context
The MPQ9840GLE-5-AEC1-Z uses peak-current-mode control with internal error amplifier, 0.8V reference, and optimized compensation network to deliver fast transient response and stable loop behavior without external components. Its dual-mode operation-selectable forced CCM or Advanced Asynchronous Mode (AAM)-enables deterministic ripple at full load and ultra-low 14μA IQ during light/no-load conditions.
Integrated BST refresh logic sustains >95% effective duty cycle under low-VIN dropout conditions by actively refreshing the bootstrap capacitor via low-side FET conduction, while hiccup-mode OCP, thermal shutdown (170°C), and open-drain PG signal (±10% window) provide system-level fault resilience in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports cold-crank (4.5V) and load-dump (36V) transients per ISO 7637-2 without external protection. |
| Output Voltage | Fixed 5.0V ±1% - eliminates external feedback resistors; enables plug-and-play integration into 5V microcontroller or sensor power domains. |
| Continuous Output Current | 3.5A - sustained at TA = +85°C with 2-layer PCB; derates to 2.8A at +105°C ambient per thermal characterization data. |
| Quiescent Current | 14μA at no load - extends battery runtime in always-on automotive modules (e.g., telematics, gateway ECUs). |
| Switching Frequency | 350kHz–2.5MHz - programmable via resistor or external SYNC clock; allows EMI optimization and inductor size reduction. |
| Protection Features | OCP (hiccup), SCP, thermal shutdown (170°C), UVLO (2.8V rising), and PG flag - meets ASIL-B functional safety readiness for non-safety-critical power rails. |
| EMI Performance | CISPR25 Class 5 compliant - validated with EMI filters per Figure 14; peak radiated emissions ≤50dBuV/m (30–1000MHz, horizontal/vertical). |
Pinout & Package
MPQ9840GLE-5-AEC1-Z is housed in a thermally enhanced QFN-16 (3mm × 4mm) package with wettable flanks for automated optical inspection (AOI) and improved solder joint reliability in automotive reflow processes. The exposed thermal pad (Pin 16) must be soldered to a minimum 120mm² copper pour with ≥6 thermal vias to achieve θJA = 48°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Pull high for in-phase SYNC; pull low or GND for 180° out-of-phase; required for multi-phase interleaving. |
| 2 VIN | Main input supply | Accepts 3.3V–36V; requires local 10μF ceramic decoupling within 3mm of pin to suppress switching noise. |
| 3,10 SW | Power switch node | Internally connected high-side/low-side drain node; drives external inductor; layout critical for EMI control. |
| 4,9 PGND | Power ground return | Separate from AGND; must connect directly to thermal pad and high-current return path to minimize ground bounce. |
| 5 EN | Enable control | Logic-high (>1.05V) enables regulation; logic-low (<0.9V) disables with 2μA shutdown current. |
| 6 SYNC | Frequency sync & mode select | Drives external clock (350kHz–2.5MHz) or sets CCM/AAM mode pre-startup; threshold: 0.4V low / 1.8V high. |
| 7 PG | Power-good indicator | Open-drain output asserts high when VOUT is within ±10% of 5V; requires external 10kΩ pull-up to VOUT or bias rail. |
| 8 BIAS | Efficiency-boosting bias supply | Connect to stable 5V–18V source to reduce internal LDO losses; improves full-load efficiency by ~1.2% at 12VIN/5VOUT. |
| 11 BST | Bootstrap supply | Requires 0.1μF–1μF ceramic capacitor to SW; internal regulator maintains ~5V for HS-FET gate drive during high-duty-cycle operation. |
| 12 VCC | Internal circuit supply | Powered by internal LDO or BIAS; requires ≥1μF ceramic decoupling to PGND; not user-accessible for external regulation. |
| 13 AGND | Analog reference ground | Must tie to PGND at single point near IC; isolates FB/SS/EN analog signals from high-di/dt power return paths. |
| 14 SS | Soft-start timing | External capacitor sets ramp time (tSS ≈ 10μA × CSS); floating defaults to 0.7ms internal soft-start. |
| 15 FB | Feedback input | Internally tied to 5V output for fixed version; no external divider needed - reduces component count and layout sensitivity. |
| 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 -40°C to +125°C operation with HTOL, TC, UHAST, and ESD testing - certified for engine bay and front-end electronics. |
| Wettable flank QFN-16 package | Enables AOI-compatible solder joint inspection and improves mechanical reliability under thermal cycling (ΔT = 100K, 1000 cycles). |
| Advanced Asynchronous Mode (AAM) | Reduces light-load IQ to 14μA while maintaining regulated 5V output - extends battery life in parked vehicle scenarios. |
| 80ns minimum on-time | Supports high VIN-to-VOUT ratios (e.g., 24V→5V at 21% duty cycle) without pulse-skipping instability or regulation loss. |
| Integrated 125mΩ/55mΩ MOSFETs | Eliminates external power devices; achieves >92% peak efficiency at 12VIN/5VOUT/2A with 4.7μH inductor. |
| CISPR25 Class 5 EMI compliance | Validated with standard EMI filter (Figure 14); meets automotive EMC requirements without custom shielding or ferrite beads. |
Applications
| ADAS Camera Power Supply | Automotive Infotainment SoC Core Rail |
|---|---|
|
Use Scenario: Powers 5V rail for CMOS image sensors and ISP processors in forward-facing driver assistance cameras. IC Role / Device Role / Timing Role: Primary 5V buck regulator delivering clean, low-noise power with fast load-step response to handle burst-mode sensor readout. Use Value: 14μA quiescent current extends vehicle-off battery life; CISPR25 Class 5 compliance prevents EMI interference with radar and V2X receivers. |
Use Scenario: Supplies 5V core voltage to application processors (e.g., NXP i.MX8, Qualcomm SA8155) in head-unit and digital cluster systems. IC Role / Device Role / Timing Role: High-current, thermally robust DC/DC converter supporting dynamic voltage scaling and rapid wake-from-sleep transitions. Use Value: 3.5A continuous rating handles CPU peak loads; AEC-Q100 Grade-1 ensures reliability across temperature extremes (-40°C to +125°C). |
| Body Control Module (BCM) Subsystem | Telematics Control Unit (TCU) Power Management |
|
Use Scenario: Generates 5V for LIN transceivers, door module MCUs, and LED drivers in centralized body electronics. IC Role / Device Role / Timing Role: Input-transient-hardened buck converter with UVLO hysteresis (150mV) to survive battery voltage dips during cranking. Use Value: 36V max input withstands load-dump events; wettable flank package ensures long-term solder joint integrity in vibration-prone chassis locations. |
Use Scenario: Provides always-on 5V rail for cellular modem, GNSS receiver, and secure element in vehicle connectivity gateways. IC Role / Device Role / Timing Role: Ultra-low-IQ regulator enabling <100μA system sleep current while maintaining RTC and wake-on-LTE functionality. Use Value: 2μA shutdown current minimizes parasitic drain; PG signal enables firmware-controlled power sequencing and brown-out detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 5V synchronous buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS54360BQPWPRQ1 | 42V input, 3.5A, 145μA IQ, no AAM, no wettable flanks, SOIC-8 package | Lacks AEC-Q100 Grade-1 thermal range (only Grade-2: -40°C to +105°C); higher IQ limits battery runtime | Choose if SOIC-8 footprint is mandatory and thermal derating to +105°C is acceptable. |
| LM61480QRJRRQ1 | 36V input, 5A, 15μA IQ, AEC-Q100 Grade-1, QFN-16 (3mm×4mm), no wettable flanks | Higher current rating but larger solution size due to external BOOT capacitor requirement and no integrated BST regulator | Choose if >3.5A peak current is required and AOI inspection of solder joints is not mandated. |
Compared with TPS54360BQPWPRQ1 and LM61480QRJRRQ1, MPQ9840GLE-5-AEC1-Z uniquely combines AEC-Q100 Grade-1, wettable flank packaging, integrated BST regulation, and 14μA IQ in a space-constrained QFN-16 - making it optimal for compact, high-reliability automotive modules where thermal margin, EMI, and manufacturability are co-prioritized.
Availability
MPQ9840GLE-5-AEC1-Z is available at Aetrix Electronics and suitable for automotive ADAS camera power supplies, infotainment SoC core rails, and telematics control unit subsystems requiring stable component supply with full AEC-Q100 traceability and extended temperature support.
Supply support for MPQ9840GLE-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 expertise in DC/DC conversion, motor drivers, and automotive-grade power solutions.
The MPQ9840 product line is engineered specifically for automotive power systems demanding AEC-Q100 qualification, ultra-low quiescent current, and robust EMI performance - targeting ADAS, infotainment, and body electronics applications where reliability and regulatory compliance are non-negotiable.
FAQ
What is the maximum allowable input voltage for MPQ9840GLE-5-AEC1-Z?
The absolute maximum input voltage is 40V, but the recommended operating range is 3.3V to 36V per datasheet Section 4. This covers automotive cold-crank (down to 3.3V) and load-dump (up to 36V) transients per ISO 7637-2, with built-in UVLO hysteresis (150mV) ensuring robust startup recovery.
Does MPQ9840GLE-5-AEC1-Z require an external feedback resistor divider?
No. The "-5" suffix denotes a fixed 5V output version; Pin 15 (FB) is internally connected to the output, eliminating external resistors. This reduces BOM count, layout sensitivity, and potential drift errors - confirmed in the Top Marking section (page 4) and Pin Functions table (page 20).
How does the BST refresh function operate during high-duty-cycle conditions?
When BST-to-SW voltage drops below 2.5V, the IC forces the low-side FET on to recharge the BST capacitor through the internal diode path. This occurs in DCM or PSM modes and enables >95% effective duty cycle operation - critical for 24V-to-5V conversion where minimum on-time constraints would otherwise cause regulation failure.
Can MPQ9840GLE-5-AEC1-Z be synchronized to an external clock?
Yes. Driving Pin 6 (SYNC) with a 350kHz–2.5MHz logic-level clock synchronizes the internal oscillator. The external clock must exceed the RFREQ-set frequency by ≥250kHz. SYNC also selects CCM (high) or AAM (low) before startup - detailed in Section "Operation", page 21.
What thermal performance can be expected on a standard 2-layer PCB?
With the QFN-16 thermal pad soldered to a 120mm² copper pour and ≥6 thermal vias, θJA is 48°C/W (JESD51-7). At 3.5A output and 12VIN, junction temperature rise is ~165°C above ambient - thus limiting continuous operation to TA ≤ +85°C unless enhanced cooling is applied.
Is the PG signal active-high or open-drain?
PG is an open-drain output requiring an external pull-up resistor (typically 10kΩ to VOUT or BIAS). It asserts low when VOUT falls outside the ±10% window (4.5V–5.5V) and floats high when regulation is valid - per Electrical Characteristics table (page 6), PG rising threshold is 90% of VREF.
What is the purpose of the BIAS pin, and when should it be used?
BIAS supplies the internal LDO that powers VCC and control circuitry. Connecting BIAS to a clean 5V–18V source bypasses the VIN-based LDO, reducing power dissipation and improving full-load efficiency by up to 1.2%. If unused, float BIAS or tie to GND - per Pin Functions (page 20).
MPQ9840GLE-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:
- 3.5A
- 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)
MPQ9840GLE-5-AEC1-Z FAQ
1.How can I place an order for MPQ9840GLE-5-AEC1-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9840GLE-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 MPQ9840GLE-5-AEC1-Z reliable?
The price and inventory of MPQ9840GLE-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 MPQ9840GLE-5-AEC1-Z is usually 5 days.
3.What payment methods are accepted for MPQ9840GLE-5-AEC1-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9840GLE-5-AEC1-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9840GLE-5-AEC1-Z?
MPQ9840GLE-5-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9840GLE-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 MPQ9840GLE-5-AEC1-Z?
For technical support, including MPQ9840GLE-5-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9840GLE-5-AEC1-Z requirements.
6.How does Aetrix verify that MPQ9840GLE-5-AEC1-Z is sourced from the original manufacturer or authorized distributors?
All MPQ9840GLE-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 MPQ9840GLE-5-AEC1-Z meets industry standards.
7.What is the process for return or replacement of MPQ9840GLE-5-AEC1-Z?
All MPQ9840GLE-5-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9840GLE-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 MPQ9840GLE-5-AEC1-Z part is unused and in its original packaging.
Return procedure for MPQ9840GLE-5-AEC1-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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