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Monolithic Power Systems Inc. MPQ2918GF-P
- Part No.:
- MPQ2918GF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- DC DC Switching Controllers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MPQ2918GF-P.pdf
- Description:
- INDUSTRIAL GRADE.4V-40V INPUT, C
- Quantity:
- Payment:
- Shipping:
Inventory:1,976
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Product details
Overview
MPQ2918GF-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 systems.
For engineers reviewing the MPQ2918GF-P datasheet, MPQ2918GF-P pinout, MPQ2918GF-P application, or MPQ2918GF-P equivalent, key selection criteria include its dual-MOSFET gate drive capability, 99.5% max duty cycle for cold-crank operation, 180° out-of-phase SYNCO output for multi-phase synchronization, and integrated OVP/OCP/thermal shutdown with hiccup-mode recovery.
Technical Context
The MPQ2918GF-P implements pulse-width modulation (PWM) current-mode control with cycle-by-cycle current limiting and slope compensation. Its error amplifier compares FB against a 0.8V reference and drives COMP to regulate output voltage via external N-MOSFETs.
It supports three operating modes: forced continuous conduction mode (CCM), advanced asynchronous mode (AAM) for light-load efficiency, and low-dropout mode enabling 99.5% duty cycle during automotive cold-crank. Gate drivers feature 2Ω TG pull-up, 1Ω TG pull-down, 3Ω BG pull-up, and 1Ω BG pull-down with 60ns dead time.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 40V - supports wide automotive battery range including cold-crank transients down to 4V. |
| Feedback Reference | 0.8V ±1.5% over temperature - enables accurate output regulation across -40°C to +125°C junction range. |
| Switching Frequency | 100kHz–1000kHz programmable via FREQ resistor or external sync clock - allows EMI optimization and noise-sensitive system integration. |
| Max Duty Cycle | 99.5% - ensures stable regulation during low-input conditions such as automotive cranking. |
| Current Sense Threshold | 15mV–85mV selectable via ILIM pin configuration - provides flexible peak-current limit setting for diverse inductor and MOSFET combinations. |
| OVP Threshold | 110%–120% of VFB - triggers discharge mode with LS-FET activation to safely clamp overvoltage events. |
| Thermal Shutdown | 170°C with 20°C hysteresis - protects die under sustained overload while enabling automatic recovery after cooling. |
Pinout & Package
MPQ2918GF-P is housed in a TSSOP-20EP package with exposed thermal pad, optimized for automotive thermal management and wettable flank solder inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pin 1) | Main input supply connection | Accepts 4V–40V DC input; requires local ceramic decoupling to suppress transients. |
| EN/SYNC (Pin 2) | Enable and external clock input | 1.22V threshold with 130mV hysteresis; enables UVLO or synchronizes switching to external clock (100–1000kHz). |
| VCC2 (Pin 3) | External bias supply input | Enables VCC1 regulation from external 4.7V–12V source to reduce dissipation and improve efficiency. |
| VCC1 (Pin 4) | Internal bias rail output | 5V ±5% regulated output powering gate drivers and internal circuitry; requires ≥1µF PGND-decoupled capacitor. |
| SGND (Pin 5) | Signal ground reference | Low-noise analog ground for FB, COMP, SS, and sense inputs; must be separated from PGND at single-point star connection. |
| SS (Pin 6) | Soft-start timing control | Charged by 4µA internal current source; sets ramp time via external capacitor to prevent output overshoot at startup. |
| COMP (Pin 7) | Error amplifier output | Drives external R-C compensation network to stabilize control loop and optimize transient response. |
| FB (Pin 8) | Output voltage feedback | Compares resistive divider output against 0.8V reference; determines regulated output voltage (VOUT = 0.8V × (1 + R1/R2)). |
| CCM/AAM (Pin 9) | Conduction mode select | Configures CCM (float/VCC1) or AAM (resistor-to-SGND); AAM voltage ≥480mV enables light-load efficiency boost. |
| FREQ (Pin 10) | Frequency programming | Resistor-to-SGND sets oscillator frequency; 45.3kΩ yields typical 430kHz operation. |
| PG (Pin 11) | Power-good status indicator | Open-drain output asserting low when VOUT deviates >±10% from target; 28µs delay ensures stable detection. |
| ILIM (Pin 12) | Current limit threshold select | Three fixed options: SGND=25mV, VCC1=50mV, float=75mV - defines peak inductor current limit for OCP protection. |
| SYNCO (Pin 13) | Synchronization output | 180° out-of-phase clock signal for interleaving second MPQ2918 channel in dual-phase designs. |
| SENSE− (Pin 14) | Negative current sense input | Completes differential sense path with SENSE+; common-mode range 0–25V supports high-side sensing. |
| SENSE+ (Pin 15) | Positive current sense input | Differential input for inductor current monitoring; paired with SENSE− to detect valley, peak, or reverse current limits. |
| PGND (Pin 16) | Power ground return | High-current return for VCC1 regulator and bottom gate driver; must connect directly to VCC1 capacitor negative terminal. |
| BG (Pin 17) | Bottom gate driver output | Drives gate of synchronous N-MOSFET; 1Ω pull-down ensures fast turn-off and prevents shoot-through. |
| SW (Pin 18) | Switch node | Connection point between HS- and LS-FETs; serves as return for BST capacitor and reference for high-side driver. |
| TG (Pin 19) | Top gate driver output | Bootstrapped floating driver for HS-N-MOSFET; powered by BST capacitor charged via VCC1-to-BST diode. |
| BST (Pin 20) | Bootstrap supply | Positive supply for TG driver; requires external 0.1µF ceramic capacitor to SW and charging diode from VCC1. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade-1 qualification | Validated for automotive applications operating from −40°C to +125°C junction temperature with full reliability testing. |
| Advanced Asynchronous Mode (AAM) | Reduces light-load quiescent current to 250–350μA and eliminates switching losses below ~10% load via variable-frequency discontinuous operation. |
| Programmable soft start | External capacitor on SS pin sets controlled voltage ramp time, preventing inrush current and output overshoot during power-up. |
| Integrated OVP, OCP, and thermal shutdown | Independent protection circuits with hiccup-mode OCP recovery and discharge-mode OVP clamping ensure robust fault handling without external components. |
| Dual-package availability with wettable flank option | TSSOP-20EP (MPQ2918GF-P) and QFN-20 (3mm×4mm) support automated optical inspection and improved thermal performance in space-constrained layouts. |
Applications
| Automotive Infotainment Power Supply | ADAS Camera Module Bias Rail |
|---|---|
Use Scenario: Powers 5V/3A processor core and display interface in head-unit systems subject to 4V cold-crank and 40V load-dump transients. IC Role / Device Role / Timing Role: Step-down controller regulating output using external 30V-rated N-MOSFETs; SYNCO enables synchronized dual-phase design to reduce input ripple. Use Value: 99.5% max duty cycle maintains regulation during cranking; AAM extends standby battery life by reducing no-load IQ to 250μA. | Use Scenario: Supplies clean 3.3V/1.2A rail to CMOS image sensor and ISP in rear-view camera modules with strict EMI requirements. IC Role / Device Role / Timing Role: Synchronous buck controller with external sync clock input (100–1000kHz) to avoid interference with video pixel clock frequencies. Use Value: Programmable frequency and 180° SYNCO output allow interleaved operation with adjacent converters, cutting input/output ripple by 50%. |
| Industrial CAN Bus Node Power | Electric Power Steering (EPS) Auxiliary Rail |
Use Scenario: Generates isolated 5V auxiliary supply for CAN transceiver and microcontroller in factory automation controllers exposed to 24VDC bus noise. IC Role / Device Role / Timing Role: High-noise-immunity controller using differential current sense (SENSE+/SENSE−) and precision 0.8V reference for stable regulation under EFT bursts. Use Value: ±1.5% VREF accuracy and 100kHz–1MHz frequency tuning enable tight output tolerance and EMI compliance per CISPR-25 Class 5. | Use Scenario: Provides 12V/2A auxiliary power to motor driver ICs and position sensors in EPS ECUs requiring ASIL-B functional safety support. IC Role / Device Role / Timing Role: AEC-Q100 Grade-1 controller with OVP/OCP/thermal shutdown delivering fail-safe power with hiccup-mode recovery during short-circuit faults. Use Value: Integrated protections eliminate need for external crowbar circuits; PG output feeds watchdog timer to initiate safe shutdown upon undervoltage. |
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 |
|---|---|---|---|
| LM5116PWPR | Wider 3V–100V input range; no integrated AAM; uses voltage-mode control instead of current-mode. | Lacks automotive-grade qualification and light-load efficiency optimization; better suited for industrial HV input where cold-crank is not required. | Select LM5116PWPR only if input exceeds 40V or voltage-mode control is preferred for specific loop stability needs. |
| TPS40210DGQR | 4.5V–52V input; no AEC-Q100 rating; fixed 1.22V reference (vs. 0.8V); no SYNC output or wettable flank package. | Not qualified for automotive use; lacks 180° SYNCO for multi-phase sync and has lower reference accuracy (±2% vs. ±1.5%). | Choose TPS40210DGQR for cost-sensitive industrial applications where AEC-Q100 and precision regulation are not mandatory. |
Compared with LM5116PWPR and TPS40210DGQR, the MPQ2918GF-P uniquely combines AEC-Q100 Grade-1 qualification, 0.8V ±1.5% reference, 180° SYNCO, and AAM-making it the only choice for automotive infotainment and ADAS power where cold-crank operation, EMI control, and light-load efficiency are jointly critical.
Availability
MPQ2918GF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and electric power steering auxiliary rails requiring stable component supply with full AEC-Q100 traceability and long-term production support.
Supply support for MPQ2918GF-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 leadership in DC/DC conversion technology.
The MPQ2918 product line delivers high-voltage synchronous buck controllers engineered specifically for automotive power systems demanding AEC-Q100 compliance, cold-crank resilience, and multi-phase scalability.
FAQ
What is the purpose of the CCM/AAM pin, and how is it configured?
The CCM/AAM pin selects between continuous conduction mode (CCM) and advanced asynchronous mode (AAM). Connect CCM/AAM to VCC1 or leave floating for CCM operation. For AAM, tie it to SGND via a resistor ensuring VAAM ≥480mV. AAM reduces light-load quiescent current to 250–350μA and improves efficiency below ~10% load by entering variable-frequency discontinuous operation.
How does the MPQ2918GF-P handle automotive cold-crank conditions?
The MPQ2918GF-P supports cold-crank operation via 99.5% maximum duty cycle and low dropout mode. When VIN drops near VOUT, the BST–SW voltage falls below 3.05V, triggering UVLO that turns off the high-side FET and activates the low-side FET to recharge the BST capacitor. This enables sustained regulation down to 4V input while maintaining output stability.
Can the MPQ2918GF-P drive external MOSFETs with different voltage ratings?
Yes - the MPQ2918GF-P's gate drivers support N-channel MOSFETs with VDS ratings up to 100V. TG and BG outputs deliver 2Ω pull-up/1Ω pull-down strength, and the bootstrap circuit sustains high-side drive with BST–SW ≥3.05V. External MOSFET selection must consider VGS thresholds, Qg, and thermal limits within the 4V–40V input range and target output current.
What protection features are integrated, and how do they respond to faults?
Integrated protections include output over-voltage (OVP), over-current (OCP), and thermal shutdown. OVP triggers discharge mode (LS-FET on, HS-FET off) until reverse current limit is reached. OCP enters hiccup mode with periodic restart attempts. Thermal shutdown at 170°C disables switching until die cools by 20°C. All protections operate independently without external components.
Is the MPQ2918GF-P compatible with multi-phase interleaved configurations?
Yes - the SYNCO pin provides a 180° out-of-phase clock signal enabling seamless interleaving with a second MPQ2918 channel. This reduces input and output ripple by up to 50%, lowers EMI, and improves thermal distribution. No external phase-shift circuitry is needed; synchronization is achieved by connecting SYNCO of one device to EN/SYNC of the other.
How is the soft-start time calculated, and what capacitor value achieves a 10ms ramp?
Soft-start time tSS (ms) = (CSS in nF × 0.8V) / 4μA. To achieve 10ms, solve: CSS = (10 × 4) / 0.8 = 50nF. A standard 47nF capacitor yields ~9.4ms, and 56nF yields ~11.2ms. The SS pin is reset during OCP or thermal fault events (but not OVP), ensuring safe restart after fault clearance.
Does the MPQ2918GF-P require an external bootstrap diode, and what specifications are recommended?
Yes - an external Schottky diode is required from VCC1 to BST to charge the bootstrap capacitor. Recommended specs: 20V reverse voltage, ≤0.5V forward drop, 100mA average current rating, and fast recovery (<10ns). A 1N5819 or equivalent is suitable. The BST capacitor must be ≥0.1µF X7R ceramic placed adjacent to BST and SW pins.
MPQ2918GF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) 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
- Supplier Device Package:
- 20-TSSOP-EP
MPQ2918GF-P FAQ
1.How can I place an order for MPQ2918GF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ2918GF-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 MPQ2918GF-P reliable?
The price and inventory of MPQ2918GF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MPQ2918GF-P is usually 5 days.
3.What payment methods are accepted for MPQ2918GF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ2918GF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ2918GF-P?
MPQ2918GF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ2918GF-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 MPQ2918GF-P?
For technical support, including MPQ2918GF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ2918GF-P requirements.
6.How does Aetrix verify that MPQ2918GF-P is sourced from the original manufacturer or authorized distributors?
All MPQ2918GF-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 MPQ2918GF-P meets industry standards.
7.What is the process for return or replacement of MPQ2918GF-P?
All MPQ2918GF-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ2918GF-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 MPQ2918GF-P part is unused and in its original packaging.
Return procedure for MPQ2918GF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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