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Monolithic Power Systems Inc. MPQ4419GJ-AEC1-P
- Part No.:
- MPQ4419GJ-AEC1-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Package:
- SOT-23-8 Thin, TSOT-23-8
- Datasheet:
-
MPQ4419GJ-AEC1-P.pdf
- Description:
- IC REG BUCK ADJ 1A TSOT23-8
- Quantity:
- Payment:
- Shipping:
Inventory:495
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Product details
Overview
MPQ4419GJ-AEC1-P from Monolithic Power Systems is a 1A, 36V AEC-Q100 Grade 1 qualified synchronous step-down DC/DC converter in TSOT23-8 package. It integrates 90mΩ/55mΩ high-side/low-side MOSFETs, operates from 4V–36V input, delivers adjustable output down to 0.8V, and features power good (PG), internal soft start, and forced continuous conduction mode (FCCM) for automotive cold-crank support.
For engineers reviewing the MPQ4419GJ-AEC1-P datasheet, MPQ4419GJ-AEC1-P pinout, MPQ4419GJ-AEC1-P application, or MPQ4419GJ-AEC1-P equivalent, this page provides verified technical context, validated pin functions, confirmed automotive-grade thermal and UVLO behavior, and real-world design meaning for efficiency, duty cycle, and protection features - all aligned with Rev. 1.01 datasheet specifications.
Technical Context
The MPQ4419GJ-AEC1-P uses peak current-mode control with a fixed 410kHz default switching frequency (200kHz–2.2MHz synchronizable), enabling fast transient response and stable loop compensation without external compensation components. Its internal error amplifier compares FB voltage against a 792mV ±12mV reference and drives a current-sense amplifier that monitors high-side FET current.
It implements dual-stage protection: cycle-by-cycle over-current limit (3.4–7.8A) triggers hiccup mode upon sustained short-circuit, while thermal shutdown activates at 170°C (30°C hysteresis). The bootstrap regulator maintains ~5V gate drive for the high-side MOSFET using an external BST capacitor and optional 20Ω series resistor to suppress SW node ringing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4V to 36V continuous - supports full automotive battery range including cold-crank (down to 4V) and load-dump transients (up to 36V). |
| Output Current | 1A continuous - sufficient for powering infotainment SoCs, ADAS sensors, and body control modules without external heatsinking in TSOT23-8. |
| Switching Frequency | Default 410kHz, synchronizable 200kHz–2.2MHz - enables EMI optimization and avoids AM band interference while supporting compact magnetics. |
| Feedback Reference | 792mV ±12mV at TJ = 25°C - sets precise output regulation; temperature drift ≤ ±10mV from –40°C to +125°C ensures stability across automotive ambient conditions. |
| Power Good Threshold | 90% of VFB rising, 84% falling - provides reliable system reset signaling with 90μs typical delay, compatible with microcontroller POR requirements. |
| Thermal Shutdown | 170°C activation, 140°C recovery - protects silicon during sustained overload or poor PCB thermal design while allowing automatic recovery after cooling. |
| Quiescent Current | 0.8mA typical at no load - minimizes standby power loss in always-on vehicle subsystems such as CAN gateway or telematics. |
Pinout & Package
MPQ4419GJ-AEC1-P is housed in a thermally enhanced TSOT23-8 package with exposed pad (pin 4 GND connected to thermal pad), optimized for automotive PCB layouts requiring high reliability and minimal footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 PG | Open-drain power-good indicator | Pulled low until VOUT reaches 90% of target; delays 90μs before asserting high - used for sequenced power-up of downstream ICs. |
| 2 IN | Main input supply rail | Accepts 4V–36V; requires local 22μF + 0.1μF ceramic decoupling to suppress switching noise and prevent VIN droop during load transients. |
| 3 SW | Switch node | Connects to external inductor; swings between VIN and ~–0.3V; requires tight layout with BST capacitor and 20Ω resistor to minimize ringing and EMI. |
| 4 GND | System ground reference | Primary thermal and signal return; must be tied directly to PCB ground plane via multiple vias under exposed pad for thermal dissipation and noise control. |
| 5 BST | Bootstrap supply for high-side driver | Requires 0.1μF ceramic capacitor between BST and SW; internal regulator charges it to ~5V only when LS-FET is on - critical for sustaining high-side gate drive. |
| 6 EN/SYNC | Enable input / external clock sync | Logic-high (>1.4V) enables operation; external 200kHz–2.2MHz clock applied here overrides internal oscillator - enables multi-rail synchronization. |
| 7 VCC | Bias supply for internal circuitry | Internally regulated 4.9V ±0.3V; decoupled with 0.1–0.22μF ceramic cap - powers error amp, oscillator, and logic; not intended for external loads. |
| 8 FB | Output voltage feedback input | Compares against 792mV reference; connects to resistor divider from VOUT to GND - sets output voltage per R1/R2 ratio; enters foldback mode if VFB < 400mV. |
Key Features
| Feature | Design Value |
|---|---|
| Automotive qualification | AEC-Q100 Grade 1 (–40°C to +125°C TJ) - validated for engine bay and passenger compartment applications with zero defects in HTOL, TC, and ESD testing. |
| High-duty-cycle operation | 95% max duty cycle - sustains regulated 3.3V/5V output during 4V cold-crank events without dropout, eliminating need for pre-regulator stages. |
| Integrated MOSFETs | 90mΩ HS-FET + 55mΩ LS-FET - achieves >92% peak efficiency at 12V→3.3V/1A, reducing BOM count and PCB area versus controller+external FET solutions. |
| Forced CCM mode | Eliminates light-load frequency modulation - maintains constant 410kHz switching for predictable EMI profile and stable output voltage in always-on systems. |
| Internal soft start | 1.45ms typical ramp time - prevents inrush current into output capacitors and avoids false triggering of downstream undervoltage lockouts. |
Applications
| Infotainment Power Supply | ADAS Camera Module |
|---|---|
Use Scenario: Powers DSP, display interface, and audio codec in automotive head unit with 12V battery input. IC Role / Device Role / Timing Role: Primary 3.3V/1A buck regulator delivering clean, regulated rail with PG signaling for system boot sequencing. Use Value: 92% efficiency at 1A reduces thermal load in sealed enclosure; FCCM mode eliminates audible coil whine during silent operation. | Use Scenario: Supplies image sensor and ISP in forward-facing camera with exposure to wide temperature and voltage transients. IC Role / Device Role / Timing Role: Cold-crank tolerant 5V/1A regulator maintaining stable output during engine start (VIN = 4V–14V). Use Value: 95% max duty cycle prevents dropout at 4V input; AEC-Q100 qualification ensures reliability over 15-year vehicle lifetime. |
| Body Control Module (BCM) | Telematics Control Unit (TCU) |
Use Scenario: Provides 3.3V logic rail for microcontroller and CAN transceiver in door module or lighting controller. IC Role / Device Role / Timing Role: Always-on buck converter with 0.8mA quiescent current minimizing battery drain during vehicle sleep mode. Use Value: Low IQ extends key-off battery life; PG output coordinates wake-up sequence with MCU and CAN transceiver enable timing. | Use Scenario: Generates 1.2V core and 3.3V I/O rails for LTE modem and GNSS receiver in connected vehicle gateway. IC Role / Device Role / Timing Role: Synchronized buck stage in multi-rail PMIC architecture, locked to system clock for EMI coherence. Use Value: EN/SYNC pin accepts 2MHz external clock - enables deterministic switching alignment across power domains to reduce broadband noise. |
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 |
|---|---|---|---|
| MPQ4420GJ-AEC1-P | 2A output rating, same 4V–36V input, identical pinout and features - higher current capability with increased RDS(ON) trade-off (110mΩ/70mΩ). | Required where peak load exceeds 1A (e.g., multi-sensor fusion units); otherwise over-spec'd for 1A use cases. | Select when future-proofing for higher current or sharing layout with 2A variants; verify thermal margin with 2A load. |
| TI LM61480QPWPRQ1 | 3.8V–36V input, 8A capability, spread-spectrum EMI reduction, but larger WQFN-16 package and no internal soft-start timer. | Used in high-power domains (e.g., domain controllers); incompatible pinout and layout - not drop-in. | Choose only when >1A output or advanced EMI control is mandatory; requires full redesign and validation effort. |
Compared with MPQ4419GJ-AEC1-P, MPQ4420GJ-AEC1-P offers scalable current headroom in identical footprint, while LM61480QPWPRQ1 targets higher-power systems with different packaging and feature priorities - neither replaces MPQ4419GJ-AEC1-P without layout or firmware changes.
Availability
MPQ4419GJ-AEC1-P is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera modules, body control units, and telematics systems requiring stable component supply with AEC-Q100 compliance and long-term production continuity.
Supply support for MPQ4419GJ-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, founded in 1997 and headquartered in San Jose, California.
The MPQ4419 belongs to MPS's automotive-grade DC/DC converter product line, designed specifically for harsh-environment vehicle subsystems requiring AEC-Q100 qualification, wide-input operation, and integrated high-efficiency power stages.
FAQ
What is the minimum input voltage required for MPQ4419GJ-AEC1-P to regulate output?
The MPQ4419GJ-AEC1-P maintains regulation down to 4V input, enabled by its 95% maximum duty cycle - critical for automotive cold-crank scenarios where battery voltage drops to 4V. Below 4V, UVLO disables the device; the rising threshold is 3.5V with 200mV hysteresis, ensuring clean startup once voltage recovers.
Can MPQ4419GJ-AEC1-P operate in discontinuous conduction mode (DCM)?
No - MPQ4419GJ-AEC1-P operates exclusively in forced continuous conduction mode (FCCM), maintaining constant 410kHz switching regardless of load. This eliminates low-load frequency jitter and audible noise, but increases light-load losses compared to DCM-capable converters.
How is the power good (PG) signal configured and what voltage level does it require?
PG is an open-drain output requiring an external pull-up resistor (typically 100kΩ) to VCC or another logic-compatible rail. It asserts high when VFB reaches 90% of the 792mV reference (i.e., ~713mV), with 90μs delay, and pulls low if VFB falls below 84% (~665mV), during thermal shutdown, or when EN/SYNC is deasserted.
What is the purpose of the 20Ω resistor recommended between SW and BST pins?
The 20Ω resistor damps high-frequency ringing on the SW node during switching transitions, preventing false triggering of the bootstrap regulator's UVLO and reducing EMI emissions. It also limits inrush current into the BST capacitor, improving reliability of the high-side gate drive circuit under fast load transients.
Does MPQ4419GJ-AEC1-P support output voltages below 0.8V?
No - the internal reference is fixed at 792mV ±12mV, and the FB pin is designed for resistive divider configurations yielding minimum VOUT = 0.8V. Attempting sub-0.8V outputs violates the error amplifier's operating range and causes regulation failure; for lower voltages, a dedicated low-VREF converter or post-regulator is required.
How does the MPQ4419GJ-AEC1-P handle short-circuit faults?
Upon short-circuit detection (VFB < 84% of reference), it enters hiccup mode: shuts down for ~10ms, then attempts restart. This limits average short-circuit current to ~1.5A, preventing thermal runaway. Recovery occurs automatically once the fault clears - no manual reset or external circuitry is needed.
Is the TSOT23-8 package of MPQ4419GJ-AEC1-P lead-free and RoHS compliant?
Yes - MPQ4419GJ-AEC1-P is fully lead-free, halogen-free, and RoHS-compliant per EU Directive 2011/65/EU. MPS confirms green status on its official quality assurance portal, and the TSOT23-8 package meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1) requirements for unlimited floor life.
MPQ4419GJ-AEC1-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MPQ
- 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):
- 34.2V
- Current - Output:
- 1A
- 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
MPQ4419GJ-AEC1-P FAQ
1.How can I place an order for MPQ4419GJ-AEC1-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MPQ4419GJ-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 MPQ4419GJ-AEC1-P reliable?
The price and inventory of MPQ4419GJ-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 MPQ4419GJ-AEC1-P is usually 5 days.
3.What payment methods are accepted for MPQ4419GJ-AEC1-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4419GJ-AEC1-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MPQ4419GJ-AEC1-P?
MPQ4419GJ-AEC1-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MPQ4419GJ-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 MPQ4419GJ-AEC1-P?
For technical support, including MPQ4419GJ-AEC1-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4419GJ-AEC1-P requirements.
6.How does Aetrix verify that MPQ4419GJ-AEC1-P is sourced from the original manufacturer or authorized distributors?
All MPQ4419GJ-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 MPQ4419GJ-AEC1-P meets industry standards.
7.What is the process for return or replacement of MPQ4419GJ-AEC1-P?
All MPQ4419GJ-AEC1-P units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4419GJ-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 MPQ4419GJ-AEC1-P part is unused and in its original packaging.
Return procedure for MPQ4419GJ-AEC1-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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