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Monolithic Power Systems Inc. MPQ9842GLE-33-AEC1-P
- Part No.:
- MPQ9842GLE-33-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-VQFN
- Datasheet:
-
MPQ9842GLE-33-AEC1-P.pdf
- Description:
- IC REG BUCK 3.3V 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
MPQ9842GLE-33-AEC1-P from Monolithic Power Systems is a 36V, 2A, AEC-Q100 Grade-1 qualified synchronous step-down converter with fixed 3.3V 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 and ADAS domain controllers operating from wide-input battery rails.
For engineers reviewing the MPQ9842GLE-33-AEC1-P datasheet, MPQ9842GLE-33-AEC1-P pinout, MPQ9842GLE-33-AEC1-P application, or MPQ9842GLE-33-AEC1-P equivalent, key selection considerations include its AEC-Q100 Grade-1 qualification, wettable flank QFN-16 package for automated optical inspection, 80ns minimum on-time for high-duty-cycle operation, and selectable forced CCM/AAM modes for light-load efficiency optimization.
Technical Context
The MPQ9842GLE-33-AEC1-P employs peak-current-mode control with internal error amplifier and 0.8V reference, enabling fast transient response and simplified loop compensation. Its dual-mode operation-forced continuous conduction mode (CCM) or advanced asynchronous mode (AAM)-is selected via SYNC pin logic level at startup, directly impacting ripple, EMI, and light-load efficiency.
It features integrated BST refresh circuitry enabling >95% duty cycle operation down to 3.3V output from 3.3V input, supported by internal 5V VCC regulator and optional external BIAS supply (5–18V) to reduce thermal stress. Protection includes hiccup-mode over-current, thermal shutdown at 170°C, and open-drain PG signal with ±10% window.
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 in 12V automotive systems. |
| Output Voltage | Fixed 3.3V ±2.5% - eliminates external feedback resistors; verified at TJ = –40°C to +125°C. |
| Continuous Output Current | 2A - sustained under full thermal derating per θJA = 43°C/W on MPS EVB (4-layer PCB). |
| No-Load Quiescent Current | 14μA - enables >1-year battery standby in always-on automotive modules without wake-up leakage penalty. |
| Switching Frequency Range | 350kHz to 2.5MHz - programmable via FREQ resistor or synchronized externally; avoids AM/FM radio bands. |
| Minimum On-Time | 80ns - allows 3.3V output from 3.3V input at >95% duty cycle, critical for low-VIN dropout in start-stop systems. |
| PG Accuracy Window | ±10% of nominal output - provides reliable power-good assertion for downstream microcontroller reset sequencing. |
Pinout & Package
MPQ9842GLE-33-AEC1-P is housed in a wettable flank QFN-16 (3mm × 4mm, 0.5mm pitch) package, optimized for automated optical inspection (AOI) and solder joint reliability in automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures 0° or 180° phase shift relative to SYNC clock; tie to GND if unused to prevent floating. |
| 2 VIN | Main power input | Supplies internal control circuitry and power switches; requires local 10µF ceramic decoupling to PGND. |
| 3,10 SW | Switch node | Drives external inductor; pins 3 and 10 are internally bonded for reduced parasitic inductance. |
| 4,9 PGND | Power ground return | Low-impedance path for high di/dt currents; must be connected via multiple vias to inner ground plane. |
| 5 EN | Enable control | Digital input with 0.9–1.2V threshold; <0.4V disables device, drawing only 2µA shutdown current. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz external clock; logic level at startup selects CCM (high) or AAM (low). |
| 7 PG | Power-good indicator | Open-drain output asserting when VOUT is within ±10% of 3.3V; requires external pull-up to VOUT or VCC. |
| 8 BIAS | External bias supply | Optional 5–18V input reducing VCC regulator dissipation; improves efficiency and thermal margin. |
| 11 BST | Bootstrap supply | Charges via internal regulator; requires 0.1–1µF ceramic capacitor between BST and SW. |
| 12 VCC | Internal bias rail | 5V regulated supply for gate drivers and logic; bypass with ≥1µF ceramic capacitor to AGND. |
| 13 AGND | Analog ground reference | Separate 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 ramp time; internal 0.7ms default applies if unconnected. |
| 15 FB | Feedback input | Internally tied to 3.3V output for fixed version; not used externally - connect directly to VOUT. |
| 16 FREQ | Frequency programming | Resistor-to-ground sets fSW: e.g., 180kΩ → ~475kHz; enables precise EMI band placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for –40°C to +125°C junction operation with full temperature cycling, HTOL, and ESD testing per automotive standards. |
| Wettable flank QFN-16 package | Enables AOI-compatible solder joint inspection on bottom leads, improving field-reliability traceability in safety-critical modules. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 14μA while maintaining regulation - extends battery life in parked vehicle monitoring. |
| Hiccup-mode over-current protection | Limits fault energy during short-circuit events by latching off and auto-retrying, preventing thermal runaway in wiring harness faults. |
| 80ns minimum on-time | Supports 3.3V output from 3.3V input at >95% duty cycle - essential for engine start-stop and low-battery brownout resilience. |
| Integrated 125mΩ/55mΩ MOSFETs | Eliminates external power stage components; achieves >92% peak efficiency at 12V→3.3V/2A with 4.7µH inductor. |
Applications
| Automotive Infotainment Head Unit | ADAS Camera Module Power |
|---|---|
|
Use Scenario: Supplies 3.3V to SoC, display interface, and audio codec in centralized head unit with 12V battery input subject to load dump and cold crank. IC Role / Device Role / Timing Role: Primary 3.3V buck regulator delivering 2A continuous current with AEC-Q100 compliance and PG signaling for safe boot sequencing. Use Value: Maintains regulation during 4.5V cold-crank dips and rejects 36V load-dump transients without external TVS, reducing BOM count by one protection component. |
Use Scenario: Powers image sensor, ISP, and serializer in rear-view or surround-view camera with strict EMI limits per CISPR25 Class 5. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter operating in forced CCM mode to minimize radiated emissions at 2.1MHz, synchronized to system clock. Use Value: Meets CISPR25 Class 5 radiated/EMI limits up to 1GHz without additional shielding or ferrites, validated on standard 4-layer EVB. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
|
Use Scenario: Provides always-on 3.3V rail for CAN transceivers, watchdog timers, and low-power MCU in BCM with 10-year battery life target. IC Role / Device Role / Timing Role: Ultra-low-IQ buck converter in AAM mode, entering power-save mode at <1mA load to minimize parasitic drain. Use Value: 14μA no-load IQ enables <15μA total system sleep current, meeting OEM requirements for <20μA parked vehicle draw. |
Use Scenario: Generates 3.3V for LTE modem, GNSS receiver, and secure element in TCU requiring robust operation across vehicle lifecycle. IC Role / Device Role / Timing Role: AEC-Q100 qualified power stage with PG output confirming stable voltage before enabling modem firmware execution. Use Value: PG signal with 30µs deglitch ensures clean reset release after power-up, eliminating boot failures due to marginal VOUT settling. |
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 |
|---|---|---|---|
| TPS62933RTER (TI) | 3.3V fixed, 3A rating, 1.8V–20V input, 15μA IQ, QFN-16 but non-wettable flank | Lacks AEC-Q100 qualification; rated for industrial temp only (–40°C to +125°C ambient, not junction) | Select only for non-automotive industrial use where AEC-Q100 is not mandated and higher current headroom is needed. |
| MAX20404ATPA/VY+ (Maxim) | 3.3V fixed, 2A, 3.0V–36V input, 28μA IQ, 2.2MHz fixed freq, QFN-16 with wettable flanks | Higher IQ reduces battery runtime; no SYNC pin for frequency synchronization or CCM/AAM selection | Prefer when deterministic 2.2MHz operation is required and light-load efficiency is secondary to EMI predictability. |
Compared with TPS62933RTER and MAX20404ATPA/VY+, MPQ9842GLE-33-AEC1-P uniquely combines AEC-Q100 Grade-1 qualification, wettable flank packaging, 14μA IQ, and programmable CCM/AAM mode selection - making it the only option qualified for safety-critical automotive domains requiring both long-term reliability and adaptive efficiency.
Availability
MPQ9842GLE-33-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control units requiring stable component supply with full AEC-Q100 traceability and extended temperature support.
Supply support for MPQ9842GLE-33-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, Korea, and Taiwan.
The MPQ9842 product line targets automotive-grade DC/DC conversion, engineered specifically for harsh environment resilience, low EMI, and ultra-low quiescent current in next-generation vehicle electronics.
FAQ
What is the purpose of the BIAS pin on MPQ9842GLE-33-AEC1-P?
The BIAS pin accepts an external 5V–18V supply to power the internal VCC regulator, reducing power dissipation and junction temperature during high-input-voltage operation. When unused, BIAS must be floated or tied to GND; connecting it to VOUT is not permitted. This feature improves thermal margin by up to 15°C on a 4-layer board at 24V input.
How does the MPQ9842GLE-33-AEC1-P achieve AEC-Q100 Grade-1 qualification?
It undergoes full AEC-Q100 stress testing including HTOL (1000h at 150°C), temperature cycling (–40°C to +125°C, 1000 cycles), ESD (HBM ±2kV, CDM ±750V), and mechanical shock/vibration per automotive standards. The qualification applies to the entire MPQ9842GLE-x-AEC1 family, with test reports available under NDA from MPS.
Can the MPQ9842GLE-33-AEC1-P operate with input voltage as low as 3.3V?
Yes - its 80ns minimum on-time and BST refresh circuit enable >95% duty cycle operation, allowing stable 3.3V output from a 3.3V input. This capability is validated across temperature and load, supporting start-stop systems where battery voltage drops to 3.3V during cranking.
What is the function of the PHASE pin, and is it required for basic operation?
The PHASE pin selects 0° or 180° phase alignment relative to the SYNC clock signal. It is optional: tie to GND for default 180° offset or leave unconnected only if SYNC is unused. Leaving PHASE floating is prohibited, as it may cause erratic synchronization or increased EMI.
Does the MPQ9842GLE-33-AEC1-P require external compensation components?
No - it features an optimized internal compensation network designed for stability with standard 4.7µH–10µH inductors and typical output capacitors. External compensation is unnecessary for standard applications; only the soft-start capacitor (on SS) and frequency-setting resistor (on FREQ) are required external passive components.
How is power-good (PG) asserted, and what is its timing behavior?
PG asserts high (open-drain pulled up externally) when VOUT reaches 90–95% of 3.3V and remains high until VOUT falls below 79–84% of nominal. Its deglitch timer is 30µs on rising edge and 50µs on falling edge, preventing false toggling during transient load steps or input dips.
Is the MPQ9842GLE-33-AEC1-P pin-compatible with other MPQ9842 variants?
Yes - all MPQ9842 variants (including -5-AEC1, -GL, and adjustable versions) share identical QFN-16 pinout and footprint. Only FB and FREQ connections differ: FB is tied internally for fixed-output versions, and FREQ resistor value changes per target frequency, but layout remains fully compatible.
MPQ9842GLE-33-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:
- 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:
- 2A
- 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)
MPQ9842GLE-33-AEC1-P FAQ
1.How can I place an order for MPQ9842GLE-33-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-P reliable?
The price and inventory of MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ9842GLE-33-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9842GLE-33-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9842GLE-33-AEC1-P?
MPQ9842GLE-33-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-P?
For technical support, including MPQ9842GLE-33-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9842GLE-33-AEC1-P requirements.
6.How does Aetrix verify that MPQ9842GLE-33-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ9842GLE-33-AEC1-P?
All MPQ9842GLE-33-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9842GLE-33-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 MPQ9842GLE-33-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ9842GLE-33-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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