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Monolithic Power Systems Inc. MPQ4418AGJ-AEC1-P
- Part No.:
- MPQ4418AGJ-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ4418AGJ-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 600MA TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
MPQ4418AGJ-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified, synchronous step-down DC/DC converter delivering up to 0.6A continuous output current across a 4V–36V input range. It integrates 90mΩ high-side and 55mΩ low-side MOSFETs, operates at 410kHz default switching frequency, and features power good (PG), internal soft start, and hiccup-mode over-current protection. It serves as a primary voltage regulator in automotive body control modules requiring cold-crank operation down to 4V.
For engineers reviewing the MPQ4418AGJ-AEC1-P datasheet, MPQ4418AGJ-AEC1-P pinout, MPQ4418AGJ-AEC1-P application, or MPQ4418AGJ-AEC1-P equivalent, key selection criteria include its TSOT23-8 automotive-grade package, 0.8V feedback reference, 92% maximum duty cycle for cold-crank support, thermal shutdown at 170°C, and EN/SYNC dual-function pin enabling external clock synchronization from 200kHz to 2.2MHz.
Technical Context
The MPQ4418AGJ-AEC1-P employs peak current-mode control with an internal 0.8V reference and optimized compensation, eliminating need for external loop components. Its 410kHz fixed-frequency oscillator supports external synchronization via the EN/SYNC pin, enabling EMI reduction through frequency dithering or system-level clock alignment.
It implements a dedicated bootstrap regulator with internal 5V charge pump and 20Ω BST resistor recommendation to sustain high-side gate drive during high-duty-cycle operation. The integrated PG open-drain output asserts after VFB reaches 90% of 0.8V with 90μs deglitch, providing reliable power sequencing feedback in automotive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V - Supports full automotive battery range including cold-crank (4V) and load-dump (36V) transients. |
| Output Current | 0.6A continuous - Sustains full rated load without derating at TJ ≤ 125°C in TSOT23-8 package. |
| Feedback Reference | 792mV typical (776–808mV) - Enables precise output setting via resistor divider; tolerance directly impacts VOUT accuracy. |
| Switching Frequency | 410kHz default, 200kHz–2.2MHz sync-capable - Balances efficiency, size, and EMI; external sync avoids beat frequencies. |
| High-Side RDS(ON) | 90mΩ typ - Minimizes conduction loss at high VIN/VOUT ratios; critical for >90% efficiency at light loads. |
| Thermal Shutdown | 170°C activation, 30°C hysteresis - Protects silicon during sustained overload; auto-recovery ensures fault resilience. |
| Power Good Threshold | 90% of VFB rising, 84% falling - Provides clean, glitch-filtered rail-valid signal for microcontroller reset sequencing. |
Pinout & Package
MPQ4418AGJ-AEC1-P is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), qualified to AEC-Q100 Grade 1 (−40°C to +125°C TJ). Exposed pad improves thermal performance; recommended PCB layout includes direct GND plane connection via multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (PG) | Open-drain power-good indicator | Pulled high when VFB ≥ 90% of 0.8V; requires external pull-up (e.g., 100kΩ to VCC) for logic-level signaling. |
| 2 (IN) | Main input supply rail | Accepts 4V–36V; must be decoupled with 22µF + 0.1µF ceramic capacitors placed adjacent to pin for transient suppression. |
| 3 (SW) | Internal switch node | Connects to inductor; high dv/dt node requiring short, low-inductance routing away from analog traces (e.g., FB). |
| 4 (GND) | Power and signal reference ground | Primary thermal and electrical return; must connect to large copper pour with multiple vias to inner ground planes. |
| 5 (BST) | Bootstrap capacitor connection | Requires 0.1µF–1µF ceramic cap between BST and SW; 20Ω series resistor suppresses ringing during HS-FET turn-on. |
| 6 (EN/SYNC) | Enable input / external clock input | Pull ≥1.4V to enable; apply 200kHz–2.2MHz square wave for synchronization; clamped at 6.5V Zener. |
| 7 (VCC) | Bias supply for internal circuitry | Internally regulated 4.9V output; decouple with 0.1µF–0.22µF ceramic cap close to pin and GND. |
| 8 (FB) | Resistor-divider feedback input | Senses output via resistive divider; internal 0.8V reference sets VOUT = 0.8V × (1 + R1/R2); trace must be short and shielded. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 - Validated for −40°C to +125°C junction operation, essential for under-hood applications. |
| High-duty-cycle capability | 95% max duty cycle - Maintains regulation during automotive cold-crank events where VIN drops to 4V while VOUT = 3.3V/5V. |
| Integrated MOSFETs | 90mΩ HS-FET + 55mΩ LS-FET - Eliminates external power devices; reduces BOM count and layout complexity in space-constrained modules. |
| Forced CCM mode | Continuous conduction across full load range - Ensures stable output ripple and predictable EMI profile, critical for noise-sensitive sensors. |
| Robust protection suite | OCP with hiccup mode, thermal shutdown, UVLO (3.5V rise/3.3V fall), and PG monitoring - Enables autonomous fault recovery without host intervention. |
Applications
| Automotive Body Control Module (BCM) | Automotive Infotainment Power Rail |
|---|---|
|
Use Scenario: Regulating 12V battery to 3.3V/5V for microcontrollers, CAN transceivers, and LED drivers in door modules and seat controllers. IC Role / Device Role / Timing Role: Primary buck regulator supplying always-on and ignition-switched rails; PG signal enables safe MCU boot sequencing. Use Value: Cold-crank support (4V IN) ensures uninterrupted operation during engine start; AEC-Q100 qualification guarantees reliability over 15-year vehicle lifecycle. |
Use Scenario: Generating stable 5V rail for display controllers and audio codecs in head units exposed to wide temperature and voltage transients. IC Role / Device Role / Timing Role: Secondary voltage regulator with tight line/load regulation (<±1%) and low-output-ripple design for analog-sensitive subsystems. Use Value: 410kHz switching minimizes inductor size while maintaining <15mVpp ripple; SYNC capability allows alignment with system clock to reduce EMI peaks. |
| Industrial Telematics Unit | Commercial Vehicle ADAS Sensor Hub |
|
Use Scenario: Powering GPS/GNSS receivers and cellular modems in fleet management gateways operating across 9V–36V vehicle batteries. IC Role / Device Role / Timing Role: Input-stage buck converter preceding LDOs; handles load dump (36V) and reverse-polarity protected inputs. Use Value: 36V absolute max rating and integrated OCP prevent damage during ISO 7637-2 pulse 5a transients; TSOT23-8 footprint saves board area in compact enclosures. |
Use Scenario: Supplying 3.3V to radar preprocessing SoCs and camera ISPs in front-end sensor fusion modules. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator with fast transient response (<10µs) to handle burst-mode processing loads. Use Value: Peak current-mode control delivers <5% VOUT deviation during 100mA–600mA load steps; PG output triggers watchdog reset on undervoltage. |
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 |
|---|---|---|---|
| TPS62130ARGTR | 3V–17V input, 3A output, 2.25MHz fixed fSW, no AEC-Q100 rating | Targeted at industrial/commercial portable electronics, not automotive under-hood use | Select only for non-automotive designs requiring higher current and smaller inductors; lacks cold-crank and thermal robustness. |
| LM61480RQWR | 3V–36V input, 8A output, 2.1MHz sync-capable, AEC-Q100 Grade 1, larger WQFN-24 package | Designed for high-power ADAS domain controllers and gateway ECUs needing >1A output | Choose when scaling beyond 0.6A or requiring lower thermal resistance; MPQ4418AGJ-AEC1-P remains optimal for cost- and size-constrained sub-1A nodes. |
Compared with TPS62130ARGTR and LM61480RQWR, MPQ4418AGJ-AEC1-P uniquely balances ultra-compact TSOT23-8 packaging, automotive qualification, and cold-crank capability at sub-1A output-making it the most space-efficient AEC-Q100-compliant solution for distributed low-power automotive rails.
Availability
MPQ4418AGJ-AEC1-P is available at Aetrix Electronics and suitable for automotive body control modules, industrial telematics units, and commercial vehicle ADAS sensor hubs requiring stable component supply with guaranteed long-term automotive lifecycle support.
Supply support for MPQ4418AGJ-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 power management ICs, with core expertise in DC/DC converters, LED drivers, and motor drivers.
The MPQ4418A product line targets automotive power conversion applications demanding AEC-Q100 compliance, high efficiency at light loads, and robust transient handling-specifically engineered for body electronics, infotainment, and telematics subsystems.
FAQ
What is the minimum input voltage required for startup?
The MPQ4418AGJ-AEC1-P starts up when input voltage exceeds the UVLO rising threshold of 3.5V. It maintains regulation down to 4V input, enabling reliable operation during automotive cold-crank conditions where battery voltage dips transiently to 4V while powering 3.3V or 5V loads.
Can the switching frequency be adjusted without external components?
No. The default 410kHz frequency is fixed internally, but the device supports external synchronization from 200kHz to 2.2MHz via the EN/SYNC pin. No resistor or capacitor programming is required-only a clean CMOS-compatible clock signal with ≤1.7μs pulse width is needed.
How does the power-good (PG) pin behave during thermal shutdown?
During thermal shutdown, the PG pin is actively pulled low within microseconds, independent of FB voltage. This provides immediate fault indication to the host controller, enabling system-level thermal management responses such as fan activation or load shedding before die temperature reaches 170°C.
Is an external bootstrap diode required for proper operation?
No. The MPQ4418AGJ-AEC1-P includes an internal bootstrap regulator and requires only a 0.1µF–1µF ceramic capacitor between BST and SW pins. An external diode (e.g., 1N4148) is optional and recommended only for high-duty-cycle (>65%) applications to improve efficiency by reducing BST charging losses.
What is the recommended output capacitor ESR for stable operation?
The MPQ4418AGJ-AEC1-P is optimized for low-ESR ceramic capacitors (X5R/X7R). For a 3.3V/0.6A output, a 22µF–47µF 0603/0805 ceramic capacitor with ESR <10mΩ ensures <15mVpp ripple and maintains loop stability without additional compensation components.
Does the device support forced continuous conduction mode (FCCM) at light loads?
Yes. FCCM is enabled by default and cannot be disabled. This ensures constant switching frequency and predictable EMI spectrum across the full 0–0.6A load range-critical for automotive EMC compliance and avoiding audible noise in sensitive cabin environments.
How is over-current protection implemented during output short-circuit?
Upon short-circuit detection (VFB dropping below 84% of 0.8V), the device enters hiccup mode: it shuts down for ~10ms, then attempts restart. This limits average short-circuit current to <100mA, preventing thermal runaway and enabling automatic recovery once the fault is removed-no manual reset required.
MPQ4418AGJ-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- SOT-23-8 Thin, TSOT-23-8
- 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):
- 4V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 32.4V
- Current - Output:
- 600mA
- Frequency - Switching:
- 410kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-8
MPQ4418AGJ-AEC1-P FAQ
1.How can I place an order for MPQ4418AGJ-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4418AGJ-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 MPQ4418AGJ-AEC1-P reliable?
The price and inventory of MPQ4418AGJ-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 MPQ4418AGJ-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4418AGJ-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4418AGJ-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4418AGJ-AEC1-P?
MPQ4418AGJ-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4418AGJ-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 MPQ4418AGJ-AEC1-P?
For technical support, including MPQ4418AGJ-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4418AGJ-AEC1-P requirements.
6.How does Aetrix verify that MPQ4418AGJ-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4418AGJ-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 MPQ4418AGJ-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4418AGJ-AEC1-P?
All MPQ4418AGJ-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4418AGJ-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 MPQ4418AGJ-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4418AGJ-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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