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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - DC DC Switching Regulators

Monolithic Power Systems Inc. MPQ4419GJ-AEC1-Z

Name: MPQ4419GJ-AEC1-Z
Brand: Monolithic Power Systems Inc.
SKU: MPQ4419GJ-AEC1-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MPQ4419GJ-AEC1-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: Voltage Regulators - DC DC Switching Regulators

Package:: SOT-23-8 Thin, TSOT-23-8

Datasheet:: MPQ4419GJ-AEC1-Z.pdf

Description:: IC REG BUCK ADJ 1A TSOT23-8

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Product details

Overview

MPQ4419GJ-AEC1-Z from Monolithic Power Systems is a synchronous step-down DC/DC converter IC qualified to AEC-Q100 Grade 1, delivering 1A continuous output current with 4V–36V input range, 0.8V–32.4V adjustable output, and 410kHz default switching frequency. It integrates 90mΩ/55mΩ high- and low-side MOSFETs and operates in forced continuous conduction mode (FCCM) for stable automotive cold-crank performance.

For engineers reviewing the MPQ4419GJ-AEC1-Z datasheet, MPQ4419GJ-AEC1-Z pinout, MPQ4419GJ-AEC1-Z application, or MPQ4419GJ-AEC1-Z equivalent, key selection criteria include its AEC-Q100 qualification, TSOT23-8 package footprint, power-good (PG) open-drain signal, internal soft-start timing (1.5ms), and synchronization capability across 200kHz–2.2MHz external clock range.

Technical Context

The MPQ4419GJ-AEC1-Z employs peak-current-mode control with internal 0.8V reference and optimized compensation, enabling fast transient response without external loop components. Its integrated bootstrap regulator sustains high-side gate drive during duty cycles up to 95%, supporting operation down to 4V input-critical for automotive cold-crank conditions.

Functional safety features include over-current protection with hiccup-mode recovery, thermal shutdown at 170°C (with 30°C hysteresis), and UVLO with 3.5V rising/3.3V falling thresholds. The PG pin provides validated power-rail status with 90μs delay after VFB reaches 90% of reference, referenced to FB voltage-not absolute output voltage.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4V to 36V continuous - supports full automotive battery range including cold-crank dips to 4V and load-dump transients up to 36V.
Output Current	1A continuous - rated under thermal limits in TSOT23-8 package with θJA = 100°C/W on 4-layer PCB.
Switching Frequency	Default 410kHz, synchronizable 200kHz–2.2MHz - enables EMI optimization and avoids sensitive bands like AM radio (530–1710kHz).
R_DS(ON)	90mΩ (HS) / 55mΩ (LS) - minimizes conduction loss at 1A, enabling >92% efficiency at 12V→3.3V/1A per typical curves.
Feedback Reference	792mV typ (776–808mV) - sets output via resistor divider; tolerance directly impacts output accuracy (e.g., ±1.5% at VOUT = 3.3V).
Power Good Threshold	90% of V_FB rising, 84% falling - ensures reliable rail validation independent of absolute VOUT drift.
Soft-Start Time	1.5ms typ (0.55–2.45ms) - prevents inrush current and output overshoot during startup with no external component required.

Pinout & Package

MPQ4419GJ-AEC1-Z is housed in a thermally enhanced TSOT23-8 package (2.9mm × 1.6mm × 0.85mm), with exposed pad for improved heat dissipation and RoHS-compliant matte-tin lead finish.

Pin/Terminal	Circuit Role	Design Meaning
1 - PG	Open-drain power-good indicator	Pulled low until V_FB ≥ 90% of reference; delays 90μs before asserting high - confirms regulation stability, not just voltage presence.
2 - IN	Main input supply connection	Accepts 4–36V; requires local 22μF + 0.1μF ceramic decoupling to suppress switching noise and sustain current during transients.
3 - SW	Switch node	Drives external inductor; connects to BST capacitor; voltage swings from GND to VIN - layout critical for EMI and efficiency.
4 - GND	System ground reference	Return path for power and signal; must be low-impedance copper plane with multiple vias to inner layers to minimize noise coupling.
5 - BST	Bootstrap supply for high-side driver	Requires 0.1μF ceramic capacitor between BST and SW; 20Ω series resistor recommended to damp ringing and reduce EMI.
6 - EN/SYNC	Enable input / external clock sync	Logic-high (>1.4V) enables operation; external 200kHz–2.2MHz clock applied here overrides internal oscillator - no pull-up needed due to internal 500kΩ GND resistor.
7 - VCC	Bias supply for internal circuitry	Internally regulated ~5V; requires 0.1–0.22μF ceramic decoupling close to pin - exceeding 0.22μF risks instability.
8 - FB	Feedback input for output regulation	Compares against 0.792V reference; connects to resistor divider tap - trace must be short and远离SW/GND noise sources to avoid regulation error.

Key Features

Feature	Design Value
Automotive qualification	AEC-Q100 Grade 1 (−40°C to +125°C T_J) - validated for engine bay and ADAS power rails with full temperature-range parametric testing.
High-duty-cycle operation	95% max duty cycle - maintains regulation during 4V cold-crank events without dropout, unlike many 36V converters limited to <90%.
Synchronous rectification	Integrated 90mΩ HS / 55mΩ LS MOSFETs - eliminates external Schottky diode, reducing BOM count and improving light-load efficiency by >5% vs. asynchronous designs.
Fault protection suite	OCP with hiccup recovery, thermal shutdown (170°C), UVLO (3.5V/3.3V), and PG monitoring - enables self-recovering behavior during short-circuit or overtemperature events.
EMI-aware design	Controlled SW edge rate, BST damping recommendation, and 410kHz base frequency - simplifies compliance with CISPR 25 Class 5 in automotive layouts.

Applications

Infotainment Power Supply

ADAS Camera Module

Use Scenario: Powers 3.3V SoC and memory in head-unit systems with wide battery variation (6V–16V) and load-dump immunity.

IC Role / Device Role / Timing Role: Primary 1A buck regulator providing clean, regulated 3.3V rail; PG signal sequences SoC boot sequence.

Use Value: Maintains regulation at 4V input during cranking; 92% efficiency at 12V→3.3V/1A reduces thermal load in sealed enclosures.

Use Scenario: Supplies 5V to image sensor and ISP in rear-view or surround-view cameras exposed to under-hood temperatures.

IC Role / Device Role / Timing Role: Compact, AEC-Q100-compliant point-of-load converter; FCCM ensures ripple-free output during low-light frame capture.

Use Value: TSOT23-8 footprint fits tight camera PCBs; −40°C to +125°C operation survives ambient extremes without derating.

Body Control Module (BCM)

Electric Power Steering (EPS) Sensor Interface

Use Scenario: Generates 5V for microcontroller, CAN transceiver, and LED drivers in door modules and lighting controllers.

IC Role / Device Role / Timing Role: Central power hub with EN/SYNC pin enabling coordinated sleep/wake with MCU; PG confirms rail readiness before CAN initialization.

Use Value: Synchronization to system clock avoids beat frequencies; hiccup-mode OCP prevents latch-up during motor stall-induced shorts.

Use Scenario: Powers torque and position sensors in EPS systems where EMI and thermal reliability are mission-critical.

IC Role / Device Role / Timing Role: Low-noise, high-stability 3.3V supply; internal compensation eliminates need for external Type-II/III network.

Use Value: 0.8V feedback reference enables precise 3.3V output (±1.5%) across temperature; PG signal validates sensor power before steering assist activation.

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
LM61480QPWPRQ1	4.5–36V input, 8A output, 500kHz fixed freq, larger HTSSOP-16 package	Higher current capacity; lacks PG pin and external sync; requires external compensation	Select when >1A output or higher thermal margin is required; not drop-in due to pinout and compensation differences.
TPS62903-Q1	3–18V input, 3A output, 1.8–4MHz programmable freq, 1.5mm × 2mm QFN	Narrower input range; no cold-crank support below 3V; includes I²C telemetry	Prefer for compact 12V-only systems needing telemetry; unsuitable for 24V trucks or cold-crank scenarios.

Compared with LM61480QPWPRQ1 and TPS62903-Q1, MPQ4419GJ-AEC1-Z uniquely balances AEC-Q100 Grade 1 compliance, 4V cold-crank support, PG signaling, and TSOT23-8 size - making it optimal for space-constrained 1A automotive rails where input range and fault visibility are prioritized over raw current or digital control.

Availability

MPQ4419GJ-AEC1-Z is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and body control modules requiring stable component supply with full AEC-Q100 traceability and long-term production support.

Supply support for MPQ4419GJ-AEC1-Z 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 conversion, motor drivers, and LED lighting controllers.

The MPQ4419 belongs to MPS's automotive-grade buck converter product line, designed specifically for harsh-environment applications demanding AEC-Q100 qualification, wide input range, and minimal external component count.

FAQ

What is the minimum input voltage required for MPQ4419GJ-AEC1-Z to regulate output?

The MPQ4419GJ-AEC1-Z maintains regulation down to 4V input, enabled by its 95% maximum duty cycle and internal high-side driver architecture. Below 4V, UVLO disables operation - this threshold is fixed and non-adjustable, ensuring reliable cold-crank performance in 12V automotive systems.

Can MPQ4419GJ-AEC1-Z operate without an external bootstrap resistor?

No external bootstrap resistor is required, but a 20Ω resistor between SW and BST is strongly recommended in the datasheet to damp high-frequency ringing on the BST node. Omitting it increases EMI risk and may cause premature high-side FET failure due to voltage overshoot exceeding V_BS = V_SW + 6V absolute maximum.

How does the power-good (PG) pin behave during thermal shutdown?

During thermal shutdown, the PG pin is actively pulled low regardless of FB voltage level - providing unambiguous fault indication. This behavior is hardwired and cannot be disabled; PG resumes normal regulation monitoring only after die temperature falls below the 140°C hysteresis threshold and the part exits shutdown.

Is the MPQ4419GJ-AEC1-Z compatible with ceramic output capacitors only?

It supports ceramic, tantalum, or low-ESR electrolytic output capacitors. Ceramic is preferred for low ESR and stability; if using tantalum or electrolytic, ensure ESR ≤ 30mΩ to avoid loop instability. The internal compensation is optimized for ceramic, so external type-II compensation is needed for high-ESR types.

What is the purpose of the 500kΩ internal resistor on the EN/SYNC pin?

The internal 500kΩ pull-down resistor allows EN/SYNC to be left floating for automatic shutdown - eliminating need for external pull-down. When driven high, it sinks ≤6μA (at 2V), enabling direct MCU GPIO control without level-shifting. The resistor also enables UVLO adjustment via external divider per Figure 6 in the datasheet.

Does MPQ4419GJ-AEC1-Z require external compensation components?

No external compensation is required - the MPQ4419GJ-AEC1-Z uses an internally optimized Type-II compensation network tied to the FB pin. This reduces BOM count and layout sensitivity, though R1/R2 values still affect loop bandwidth; the datasheet recommends limiting bandwidth to <40kHz for stability with 410kHz f_SW.

How is output voltage accuracy affected by temperature drift?

Feedback reference drift is ±0.5mV/°C over −40°C to +125°C, resulting in ≤±1.5% total output error for a 3.3V rail. This is confirmed by Figure 6 in the datasheet showing V_FB variation of 0.790V–0.800V across temperature - a tighter spec than many competing AEC-Q100 buck regulators.

MPQ4419GJ-AEC1-Z 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):: 32.4V

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-Z FAQ

1.How can I place an order for MPQ4419GJ-AEC1-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MPQ4419GJ-AEC1-Z 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-Z reliable?

The price and inventory of MPQ4419GJ-AEC1-Z 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-Z is usually 5 days.

3.What payment methods are accepted for MPQ4419GJ-AEC1-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MPQ4419GJ-AEC1-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MPQ4419GJ-AEC1-Z?

MPQ4419GJ-AEC1-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MPQ4419GJ-AEC1-Z 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-Z?

For technical support, including MPQ4419GJ-AEC1-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MPQ4419GJ-AEC1-Z requirements.

6.How does Aetrix verify that MPQ4419GJ-AEC1-Z is sourced from the original manufacturer or authorized distributors?

All MPQ4419GJ-AEC1-Z 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-Z meets industry standards.

7.What is the process for return or replacement of MPQ4419GJ-AEC1-Z?

All MPQ4419GJ-AEC1-Z units undergo pre-shipment inspection (PSI). If there is an issue with MPQ4419GJ-AEC1-Z, 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-Z part is unused and in its original packaging.

Return procedure for MPQ4419GJ-AEC1-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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