My Inquiry
My Account
Monolithic Power Systems Inc. MPQ9841GL-AEC1-P
- Part No.:
- MPQ9841GL-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- 16-PowerVQFN
- Datasheet:
-
MPQ9841GL-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 1A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:338
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MPQ9841GL-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter with integrated 125mΩ high-side and 115mΩ low-side MOSFETs, delivering 1A continuous output current across a 3.3V–36V input range. It features programmable switching frequency (350kHz–2.5MHz), 14μA no-load quiescent current, and power-good (PG) monitoring - designed for automotive infotainment, ADAS camera modules, and body control units requiring robust operation at –40°C to +125°C junction temperature.
For engineers reviewing the MPQ9841GL-AEC1-P datasheet, MPQ9841GL-AEC1-P pinout, MPQ9841GL-AEC1-P application, or MPQ9841GL-AEC1-P equivalent, this device supports critical design requirements including CISPR25 Class 5 EMI compliance, low-dropout mode for high-duty-cycle operation, selectable forced CCM/AAM modes, and external soft-start timing - all in a wettable-flank QFN-16 (3mm×4mm) package suitable for automated optical inspection (AOI) and functional safety-critical automotive systems.
Technical Context
The MPQ9841GL-AEC1-P employs peak-current-mode control with internal compensation, enabling fast transient response and simplified loop stabilization. Its PLL-based oscillator supports precise synchronization to external clocks ≥250kHz above the RFREQ-set frequency, while the BST refresh circuit maintains >2.5V bootstrap voltage to sustain >95% effective duty cycle during low-VIN dropout conditions.
Advanced Asynchronous Mode (AAM) dynamically transitions between DCM and power-save mode (PSM) based on VCOMP crossing a threshold (VAAM), reducing quiescent current to 14μA at no load. Forced CCM mode - selected via SYNC pin logic level at startup - ensures fixed-frequency operation for predictable EMI and reduced output ripple, at the expense of light-load efficiency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.3V to 36V - supports full automotive battery range including cold-crank (4.5V) and load-dump (36V) transients. |
| Output Current | 1A continuous - sustained without derating up to +125°C TJ with proper PCB thermal design (θJA = 48°C/W). |
| Quiescent Current | 14μA at no load - enables >1-year battery standby in always-on automotive modules (e.g., telematics, door controllers). |
| Switching Frequency | 350kHz to 2.5MHz - programmable via FREQ resistor or external SYNC clock; avoids AM/FM radio bands and enables compact magnetics. |
| Feedback Reference | 0.800V ±1.5% - precision reference enables accurate output regulation for 3.3V/5V/adjustable rails with minimal divider error. |
| Power Good Threshold | ±10% window (85–95% rising, 79–89% falling) - provides reliable rail validation for microcontroller reset sequencing and system boot integrity. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects against sustained overload or poor heatsinking while allowing safe recovery after fault clearance. |
Pinout & Package
MPQ9841GL-AEC1-P is housed in a wettable-flank QFN-16 package (3mm × 4mm, 0.5mm pitch), optimized for solder joint inspection and high-reliability automotive assembly. The exposed thermal pad (Pin 13 AGND) must be connected to a dedicated PCB thermal plane with ≥4 thermal vias for optimal thermal performance (θJC = 11°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PHASE | Synchronization phase select | Configures 0° or 180° phase alignment with external SYNC clock; tie to GND if unused to prevent floating noise coupling. |
| 2 VIN | Main power input | Supplies internal control circuitry and HS-FET driver; requires local 10μF ceramic decoupling adjacent to pin. |
| 3,10 SW | Switch node | High dv/dt node connecting internal HS/LS MOSFETs; must minimize loop area to reduce EMI and ringing. |
| 4,9 PGND | Power ground return | Low-impedance path for switch current; separate from AGND and tied to thermal pad for thermal and EMI integrity. |
| 5 EN | Enable control | Digital enable with 0.9–1.2V rising threshold; must be actively driven - never left floating. |
| 6 SYNC | Frequency sync & mode select | Accepts 350kHz–2.5MHz clock; logic level at startup selects AAM (low/floating) or forced CCM (high). |
| 7 PG | Open-drain power-good | Indicates VOUT within ±10%; requires external pull-up (e.g., 10kΩ to 3.3V) for MCU reset assertion. |
| 8 BIAS | External bias supply | Accepts 5–18V external source to reduce internal regulator loss and improve efficiency at high VIN. |
| 11 BST | Bootstrap supply | Charged via internal regulator; requires 0.1–1μF ceramic capacitor between BST and SW for HS-FET gate drive. |
| 12 VCC | Internal bias rail | 5V regulated output powering control logic; requires ≥1μF local decoupling to suppress switching noise. |
| 13 AGND | Analog ground reference | Reference for FB, SS, and error amplifier; must be star-connected to PGND at single point near IC. |
| 14 SS | External soft-start | 10μA current source charges external capacitor; sets ramp time (e.g., 100nF → ~10ms) to limit inrush current. |
| 15 FB | Feedback input | Connects to resistor divider for adjustable output; 0.8V reference enables 3.3V (1:3.125) or 5V (1:5.25) configurations. |
| 16 FREQ | Frequency programming | Resistor-to-GND sets fSW: 180kΩ → 475kHz, 82kΩ → 1MHz, 27kΩ → 2.5MHz per datasheet Equation (1). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive operation from –40°C to +125°C TJ with HTOL, TC, and ESD testing per stress test plan. |
| Wettable flank QFN-16 package | Enables automated optical inspection (AOI) of solder joints - critical for zero-defect manufacturing in Tier-1 automotive supply chains. |
| Hiccup over-current protection | Shuts down on >2.5A peak HS current, then auto-retries after thermal recovery - prevents latch-up during short-circuit faults. |
| Low dropout mode with BST refresh | Maintains regulation down to VIN – VOUT ≈ 0.5V by forcing LS-FET conduction to recharge BST capacitor during high-duty cycles. |
| CISPR25 Class 5 EMI compliance | Meets peak/average conducted and radiated emission limits up to 1GHz using recommended layout and EMI filter (Fig.14). |
| Selectably forced CCM or AAM | CCM ensures constant frequency for EMI filtering; AAM reduces IQ to 14μA at light load - configurable without firmware change. |
Applications
| Automotive Infotainment Display | ADAS Camera Power Supply |
|---|---|
|
Use Scenario: Powers 3.3V SoC core and 5V interface rails in head-unit displays exposed to wide ambient temperatures and battery transients. IC Role / Device Role / Timing Role: Primary buck regulator supplying processor I/O and memory interfaces with tight output tolerance and fast load-step response. Use Value: 14μA quiescent current extends battery life during vehicle sleep mode; AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime. |
Use Scenario: Supplies 5V to image sensor and ISP in rear-view or surround-view cameras mounted in exterior housings. IC Role / Device Role / Timing Role: High-efficiency point-of-load converter operating from 9–16V battery with immunity to engine cranking dips. Use Value: Low dropout mode sustains 5V output during 6V cold-crank events; wettable flank package ensures solder joint integrity under thermal cycling. |
| Body Control Module (BCM) | Automotive Telematics Unit |
|
Use Scenario: Generates 3.3V for microcontroller and CAN transceiver in door modules, seat controllers, and lighting ECUs. IC Role / Device Role / Timing Role: Always-on power rail with ultra-low IQ, supporting wake-on-LIN/CAN and fast system boot. Use Value: 2μA shutdown current minimizes parasitic drain; PG signal validates rail before MCU initialization - preventing brown-out resets. |
Use Scenario: Powers LTE modem, GNSS receiver, and secure element in embedded telematics control units (TCUs). IC Role / Device Role / Timing Role: Input-filtered buck stage rejecting battery noise and meeting stringent automotive EMC requirements. Use Value: CISPR25 Class 5 compliance eliminates need for external EMI filters; 350kHz–2.5MHz frequency agility avoids interference with cellular bands. |
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) | Higher 3A rating, lower 1.2μA IQ, but only 17V max VIN and no AEC-Q100 Grade 1 rating. | Not qualified for under-hood or direct-battery applications; limited to 12V systems with stable input. | Choose for non-automotive industrial apps needing higher current and lower IQ - not for automotive front-end rails. |
| LM61480QRNRRQ1 (TI) | AEC-Q100 Grade 1, 36V/8A, but 15μA IQ and no wettable flank package; larger 4mm×4mm QFN. | Over-specified for 1A use cases; higher cost and board area; lacks AOI-friendly wettable leads. | Prefer when scaling to multi-rail systems requiring shared layout or future current headroom - not for space-constrained modules. |
Compared with TPS62933RTER and LM61480QRNRRQ1, the MPQ9841GL-AEC1-P uniquely balances AEC-Q100 Grade 1 compliance, wettable flank manufacturability, 14μA IQ, and 36V input in a 3mm×4mm footprint - making it optimal for cost-sensitive, space-constrained automotive modules where solder joint reliability and cold-crank performance are non-negotiable.
Availability
MPQ9841GL-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera power supplies, and body control modules requiring stable component supply across extended product lifecycles and rigorous automotive qualification standards.
Supply support for MPQ9841GL-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED drivers for automotive, industrial, and computing markets.
The MPQ9841 belongs to MPS's automotive-grade power management portfolio, engineered specifically for harsh-environment applications demanding AEC-Q100 qualification, low EMI, and long-term supply stability - targeting next-generation vehicle electrification and ADAS subsystems.
FAQ
What is the minimum input voltage required for MPQ9841GL-AEC1-P to start up?
The device has a VIN under-voltage lockout (UVLO) rising threshold of 2.4V to 3.2V, with 150mV hysteresis. Startup occurs when VIN exceeds the rising threshold - typically 2.8V - and remains active down to the falling threshold (~2.65V). This allows operation during automotive cold-crank events where battery voltage may dip to 6V, but does not support true sub-3V startup without external bias assist.
Can MPQ9841GL-AEC1-P operate in 100% duty cycle mode?
No - the MPQ9841GL-AEC1-P cannot achieve true 100% duty cycle due to bootstrap charging constraints. However, its low-dropout mode with BST refresh enables effective duty cycles >95% by periodically forcing the low-side FET on to recharge the BST capacitor, sustaining regulation down to VIN – VOUT ≈ 0.5V under high-load, high-duty conditions.
How is the switching frequency set when both FREQ resistor and SYNC signal are present?
The SYNC signal takes precedence: when a valid external clock (350kHz–2.5MHz, with >250kHz margin above RFREQ-set frequency) is applied to the SYNC pin, the internal oscillator synchronizes to it regardless of the FREQ resistor value. If SYNC is inactive (floating or <0.4V), the FREQ resistor determines fSW per Equation (1) in the datasheet.
Does MPQ9841GL-AEC1-P require an external bootstrap diode?
No - the device integrates a dedicated bootstrap regulator that charges the BST capacitor from VIN through an internal PMOS pass transistor. An external diode is unnecessary; only a 0.1–1μF ceramic capacitor between BST and SW is required. Adding a diode would impede charging and degrade high-duty-cycle performance.
What is the purpose of the BIAS pin, and when should it be used?
The BIAS pin accepts an external 5–18V supply to power the internal VCC regulator, reducing power dissipation and improving efficiency - especially at high VIN (>12V). When unused, BIAS must be floated or tied to GND; connecting it to VIN offers no benefit and increases thermal load on the internal regulator.
Is the PG signal internally pulled up?
No - PG is an open-drain output with no internal pull-up. An external pull-up resistor (typically 4.7kΩ–10kΩ to the monitored rail or system VCC) is mandatory to generate a valid logic-high signal. Without it, PG remains undriven and cannot assert power-good status to downstream logic or MCUs.
How does the MPQ9841GL-AEC1-P handle short-circuit conditions?
It implements hiccup-mode over-current protection: upon detecting >2.5A peak HS current, the device shuts down, waits for thermal recovery (~10ms), then attempts restart. This cycle repeats until the fault clears, limiting average power dissipation and preventing thermal runaway - unlike latch-off protection which requires manual reset.
MPQ9841GL-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 16-PowerVQFN
- 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:
- 1A
- Frequency - Switching:
- 350kHz ~ 2.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x4)
MPQ9841GL-AEC1-P FAQ
1.How can I place an order for MPQ9841GL-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ9841GL-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 MPQ9841GL-AEC1-P reliable?
The price and inventory of MPQ9841GL-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 MPQ9841GL-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ9841GL-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ9841GL-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ9841GL-AEC1-P?
MPQ9841GL-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ9841GL-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 MPQ9841GL-AEC1-P?
For technical support, including MPQ9841GL-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ9841GL-AEC1-P requirements.
6.How does Aetrix verify that MPQ9841GL-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ9841GL-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 MPQ9841GL-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ9841GL-AEC1-P?
All MPQ9841GL-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ9841GL-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 MPQ9841GL-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ9841GL-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MPQ9841GL-AEC1-P Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
