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Monolithic Power Systems Inc. MPQ2918GLE-AEC1-P
- Part No.:
- MPQ2918GLE-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-VFQFN Exposed Pad
- Datasheet:
-
MPQ2918GLE-AEC1-P.pdf
- Description:
- 4V-40V INPUT, CURRENT MODE SYNCH
- Quantity:
- Payment:
- Shipping:
Inventory:2,332
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Product details
Overview
MPQ2918GLE-AEC1-P from Monolithic Power Systems is a high-voltage, AEC-Q100 Grade-1 qualified, current-mode synchronous step-down controller supporting 4V–40V input and driving dual N-channel MOSFETs. It delivers precise 0.8V ±1.5% reference regulation, programmable 100–1000kHz switching frequency, and advanced asynchronous mode (AAM) for light-load efficiency optimization in automotive power rails.
For engineers reviewing the MPQ2918GLE-AEC1-P datasheet, MPQ2918GLE-AEC1-P pinout, MPQ2918GLE-AEC1-P application, or MPQ2918GLE-AEC1-P equivalent, key selection considerations include its wettable-flank QFN-20 package, dual gate drivers with 2Ω TG pull-up/1Ω TG pull-down, 99.5% max duty cycle for cold-crank support, and three configurable current-limit thresholds (25/50/75mV) via ILIM pin state.
Technical Context
The MPQ2918GLE-AEC1-P implements current-mode PWM control with cycle-by-cycle peak current limiting and slope compensation, using an internal 0.8V reference and error amplifier with 70dB DC gain and 500μS transconductance. Its control loop is stabilized via external R-C compensation on the COMP pin.
It integrates dual N-MOSFET drivers (TG/BG), bootstrap charging circuitry with BST UVLO (3.05V rising threshold), and selectable conduction modes: forced CCM (CCM/AAM floating or tied to VCC1) or AAM (CCM/AAM pulled low). SYNCO provides 180° out-of-phase clock output for multi-phase synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports automotive battery transients including cold-crank down to 4V. |
| Reference Voltage | 0.800V ±1.5% - enables accurate output regulation across -40°C to +125°C junction temperature. |
| Switching Frequency | 100kHz–1000kHz programmable via resistor or external sync - reduces EMI in noise-sensitive automotive systems. |
| Max Duty Cycle | 99.5% - sustains regulation during ultra-low VIN conditions without dropout. |
| Current Sense Threshold | 25mV / 50mV / 75mV (ILIM-selectable) - sets precise over-current protection level for matched external MOSFETs. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects against sustained overload or poor PCB thermal design. |
| Power Good Accuracy | ±3% VFB hysteresis with 28μs delay - ensures reliable system power sequencing and fault reporting. |
Pinout & Package
The MPQ2918GLE-AEC1-P is housed in a wettable flank QFN-20 (3mm × 4mm) package with exposed thermal pad, optimized for automated optical inspection (AOI) and enhanced solder joint reliability in automotive applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 19) | Main input supply | Accepts 4V–40V; requires local ceramic decoupling to suppress high di/dt transients. |
| EN/SYNC (Pin 20) | Enable & sync input | 1.22V enable threshold with 130mV hysteresis; accepts external clock 100–1000kHz for EMI reduction. |
| VCC2 (Pin 1) | External bias supply | 4.7V–12V input to power VCC1 regulator - lowers dissipation vs. VIN-derived bias. |
| VCC1 (Pin 2) | Internal bias rail | 5V ±5% output powering gate drivers and logic; requires ≥1μF PGND-decoupled ceramic capacitor. |
| SGND (Pin 3) | Signal ground | Low-noise reference for FB, COMP, SS; must be separated from PGND at single-point star connection. |
| SS (Pin 4) | Soft-start control | 4μA current source charges external capacitor - sets monotonic startup time and prevents output overshoot. |
| COMP (Pin 5) | Error amplifier output | Drives external Type II/III compensation network to stabilize loop response and ensure phase margin >45°. |
| FB (Pin 6) | Feedback input | Compares output divider voltage to 0.8V reference; 10nA bias current minimizes divider resistor power loss. |
| CCM/AAM (Pin 7) | Mode select | Configures operation: float/VCC1 = forced CCM; SGND-biased = AAM for light-load efficiency boost. |
| FREQ (Pin 8) | Frequency set | Resistor-to-SGND sets fSW; 45.3kΩ yields typical 430kHz - balances size, efficiency, and EMI. |
| PG (Pin 9) | Power good flag | Open-drain output asserting high when VOUT is within ±10% of target - used for MCU reset or downstream enable. |
| ILIM (Pin 10) | Current limit select | Three states define sense threshold: SGND = 25mV, VCC1 = 50mV, float = 75mV - matches MOSFET RDS(on) and inductor DCR. |
| SYNCO (Pin 11) | Synchronization output | 180° out-of-phase clock - enables interleaved dual-phase operation to halve input/output ripple current. |
| SENSE+ / SENSE− (Pins 12, 13) | Current sense inputs | Differential pair measuring MOSFET or inductor DCR voltage; common-mode range 0–25V supports high-side sensing. |
| PGND (Pin 14) | Power ground | High-current return for VCC1 regulator and LS driver; must connect directly to VCC1 capacitor negative terminal. |
| BG (Pin 15) | Bottom gate driver | Drives synchronous N-MOSFET source; 1Ω pull-down ensures fast turn-off and prevents shoot-through. |
| SW (Pin 16) | Switch node | High dv/dt node connecting HS-FET drain, LS-FET source, and BST capacitor - requires tight layout and guard ring. |
| TG (Pin 17) | Top gate driver | Floating driver powered by BST; 2Ω pull-up/1Ω pull-down enables fast, robust HS-FET switching with <92ns min on-time. |
| BST (Pin 18) | Bootstrap supply | Charged via external diode from VCC1; supplies floating gate drive - requires 0.1μF ceramic capacitor to SW. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for automotive ambient temperatures from −40°C to +125°C junction, meeting stress test requirements for reliability in engine bay and ADAS modules. |
| Wettable flank QFN-20 package | Enables automated optical inspection of solder joints - critical for zero-defect manufacturing in safety-critical automotive electronics. |
| Programmable soft start | 4μA constant-current source charges external capacitor - eliminates inrush current and ensures controlled ramp-up of VOUT without external circuitry. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 250–350μA and improves efficiency below 10% load - extends battery runtime in always-on vehicle subsystems. |
| Dual gate drivers with dead-time control | 60ns fixed dead time prevents shoot-through; TG/BG drivers rated for 2A peak sink/source - supports high-frequency, high-efficiency discrete MOSFET designs. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Rail |
|---|---|
Use Scenario: Powers 5V/3.3V rails for head unit SoCs, display controllers, and audio codecs in vehicles with wide battery voltage range (6V–16V nominal, down to 4V cold-crank). IC Role / Device Role / Timing Role: Primary step-down controller regulating stable intermediate bus from 12V battery; synchronizes to system clock via EN/SYNC to avoid beat frequencies. Use Value: 99.5% duty cycle maintains regulation during cold-crank; AAM reduces standby power to <100μA, extending ignition-off battery life. | Use Scenario: Supplies clean, low-noise 1.8V/1.2V rails for CMOS image sensors and ISP processors in forward-facing radar/camera fusion units. IC Role / Device Role / Timing Role: High-PSRR, low-ripple buck controller operating in CCM; uses external sync to align switching edges with sensor exposure timing. Use Value: 0.8V ±1.5% reference and precision OVP (±3% hysteresis) ensure sensor rail stability and prevent damage from transient overvoltage events. |
| Electric Power Steering (EPS) Auxiliary Rail | Body Control Module (BCM) Subsystem |
Use Scenario: Generates isolated 5V auxiliary supply for EPS motor position sensors, CAN transceivers, and microcontroller peripherals under high EMI and thermal stress. IC Role / Device Role / Timing Role: Robust controller with integrated OCP, OVP, and thermal shutdown; operates in forced CCM for consistent transient response during torque assist pulses. Use Value: Dual N-MOSFET drive capability supports high-current (>20A) discrete FETs; 170°C thermal shutdown prevents latch-up during prolonged overload. | Use Scenario: Powers door module MCUs, LED drivers, and LIN transceivers in distributed body electronics with variable load profiles and long sleep cycles. IC Role / Device Role / Timing Role: Efficient step-down controller leveraging AAM during vehicle sleep mode; PG signal coordinates wake-up sequence with main ECU. Use Value: Wettable flank package ensures solder joint integrity over 15+ year vehicle lifetime; VCC2 bias option reduces heat generation in thermally constrained BCM enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous step-down controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116QPWPRQ1 | Wide-input (6–100V), current-mode controller with integrated VCC LDO; no AAM; 500kHz max fSW; TSSOP-20EP only. | Lacks light-load efficiency optimization; higher IQ (1.2mA) limits suitability for always-on modules. | Prefer when input exceeds 40V or when AAM is not required; verify thermal performance with discrete FETs. |
| TPS40210DGQR | 4.5–52V input, voltage-mode controller; no integrated gate drivers; requires external high-side driver; 1–1000kHz fSW. | No AAM or programmable current limit; less integrated - increases BOM count and layout complexity. | Choose for cost-sensitive industrial designs where full integration is unnecessary and layout space permits external drivers. |
Compared with LM5116QPWPRQ1 and TPS40210DGQR, the MPQ2918GLE-AEC1-P offers superior light-load efficiency via AAM, tighter reference accuracy (±1.5% vs. ±2%), wettable flank packaging for automotive AOI, and lower quiescent current - making it optimal for modern low-power, safety-critical vehicle subsystems.
Availability
MPQ2918GLE-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, and electric power steering auxiliary rails requiring stable component supply, AEC-Q100 compliance, and wettable flank inspection capability.
Supply support for MPQ2918GLE-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 mixed-signal ICs for power management, motion control, and automotive applications.
The MPQ2918 product line delivers high-voltage synchronous buck controllers engineered for automotive-grade reliability, featuring AEC-Q100 qualification, wettable flank packaging, and advanced efficiency modes for next-generation vehicle electrical architectures.
FAQ
What is the purpose of the CCM/AAM pin, and how does it affect efficiency?
The CCM/AAM pin selects between continuous conduction mode (CCM) and advanced asynchronous mode (AAM). When floated or tied to VCC1, the device operates in forced CCM for consistent transient response. When pulled low (≥480mV threshold), AAM activates - reducing switching losses at light loads and lowering quiescent current to 250–350μA. This directly improves efficiency below 10% load, critical for automotive always-on subsystems.
Can MPQ2918GLE-AEC1-P drive GaN FETs, and what layout considerations apply?
Yes - its 2Ω TG pull-up and 1Ω TG pull-down drivers support fast GaN FET switching, and the 92ns minimum TG on-time accommodates high-frequency GaN operation. Layout requires strict separation of SGND and PGND, minimized SW node area, dedicated BST capacitor routing with short traces to SW, and guard rings around high dv/dt nodes to mitigate EMI and parasitic coupling.
How does the ILIM pin configure current limit, and what are the trade-offs between settings?
The ILIM pin sets peak current limit via three states: SGND = 25mV, VCC1 = 50mV, float = 75mV. Lower thresholds suit low-RDS(on) MOSFETs or high-precision current limiting; higher thresholds allow larger inductors or higher output currents. Selecting 75mV increases short-circuit energy but improves heavy-load transient response; 25mV enhances protection sensitivity at the cost of margin under component tolerance variation.
What is the role of VCC2, and when should it be used instead of VIN-derived bias?
VCC2 (4.7V–12V) powers the internal VCC1 regulator, bypassing the VIN-to-VCC1 LDO. Using VCC2 reduces power dissipation and improves efficiency - especially when VIN is high (e.g., 24V+ systems) or when VCC1 load exceeds 50mA. It is recommended when a clean, efficient auxiliary rail (e.g., from a prior stage converter) is available and thermally constrained layouts demand lower die temperature.
Does MPQ2918GLE-AEC1-P support output voltages above 5V, and what limits the maximum?
Yes - the controller supports output voltages up to 25V per datasheet specifications. The upper limit is constrained by external component ratings: MOSFET VDS, output capacitor WV, and feedback divider resistor voltage rating. For >5V outputs, ensure the feedback divider's top resistor withstands full VOUT, and verify that the selected MOSFETs have sufficient VDS margin (e.g., ≥30V for 12V output) to handle ringing and transients.
How is thermal performance affected by the wettable flank QFN-20 package?
The wettable flank feature enables automated optical inspection of all solder joints - improving field reliability in automotive applications - but does not alter thermal resistance. The QFN-20 (3mm×4mm) package has θJA = 48°C/W and θJC = 10°C/W on a 4-layer JEDEC PCB. Optimal thermal performance requires connecting the exposed pad to both SGND and PGND with ≥4 thermal vias, using 2oz copper, and maintaining ≥100mm² copper pour under the device.
MPQ2918GLE-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 20-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4V ~ 40V
- Frequency - Switching:
- 100kHz ~ 1MHz
- Duty Cycle (Max):
- 99.5%
- Synchronous Rectifier:
- Yes
- Clock Sync:
- Yes
- Serial Interfaces:
- -
- Control Features:
- Current Limit, Dead Time Control, Enable, Frequency Control, Power Good, Soft Start, Sync
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 20-QFN (3x4)
MPQ2918GLE-AEC1-P FAQ
1.How can I place an order for MPQ2918GLE-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2918GLE-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 MPQ2918GLE-AEC1-P reliable?
The price and inventory of MPQ2918GLE-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 MPQ2918GLE-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ2918GLE-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2918GLE-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2918GLE-AEC1-P?
MPQ2918GLE-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2918GLE-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 MPQ2918GLE-AEC1-P?
For technical support, including MPQ2918GLE-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2918GLE-AEC1-P requirements.
6.How does Aetrix verify that MPQ2918GLE-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ2918GLE-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 MPQ2918GLE-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ2918GLE-AEC1-P?
All MPQ2918GLE-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2918GLE-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 MPQ2918GLE-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ2918GLE-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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