Monolithic Power Systems Inc. MPQ2454GH-AEC1-P

Overview

MPQ2454GH-AEC1-P from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified 36V, 0.6A synchronous step-down DC/DC converter with integrated 200mΩ high-side MOSFET, programmable 350kHz–2.3MHz switching frequency, and 60μA quiescent current - designed for automotive power rails requiring cold-crank operation down to 3.3V input and ±10% output regulation accuracy.

For engineers reviewing the MPQ2454GH-AEC1-P datasheet, MPQ2454GH-AEC1-P pinout, MPQ2454GH-AEC1-P application, or MPQ2454GH-AEC1-P equivalent, this device supports critical timing-sensitive automotive subsystems including ADAS camera modules, infotainment power supplies, body control units, and telematics ECUs where low shutdown current (3.5μA), programmable POK delay, and thermal shutdown (170°C) are mandatory design requirements.

Technical Context

The MPQ2454GH-AEC1-P implements current-mode control with cycle-by-cycle peak current limiting and frequency foldback during start-up or short-circuit conditions to prevent inductor current runaway. Its internal error amplifier drives a COMP node that sets switch peak current, while soft-start is controlled by a 1.8μA internal current source charging an external capacitor.

It features a dedicated bootstrap regulator that maintains ~5V across BST–SW for high-side gate drive, with active low-dropout mode enabling 100% duty cycle when BST–SW >2.5V - essential for automotive cold-crank (e.g., 4.5V VIN at -40°C). The open-drain POK signal asserts after a user-programmable delay set by a capacitor on POKDL.

Key Specifications

Pinout & Package

MPQ2454GH-AEC1-P is housed in an MSOP-10 EP package with exposed thermal pad connected to GND. Pin numbering follows standard MSOP-10 top-view layout (1–10 left-to-right, top row 1–5, bottom row 6–10).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar step-down converter applications.

Compared with TPS54340BQPWPRQ1 and LM61480AQRPGRQ1, the MPQ2454GH-AEC1-P delivers optimal balance of AEC-Q100 compliance, ultra-low shutdown current (3.5μA), and programmable POK timing - making it uniquely suited for automotive subsystems with strict battery-life and power-sequencing requirements below 1A.

Availability

MPQ2454GH-AEC1-P is available at Aetrix Electronics and suitable for automotive ADAS camera modules, infotainment core rails, and body control units requiring stable component supply with AEC-Q100 Grade 1 qualification, 15-year lifecycle support, and traceable lot documentation.

Supply support for MPQ2454GH-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 power ICs, with over 20 years of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MPQ2454 product line targets automotive power management applications requiring AEC-Q100 qualification, cold-crank resilience, and low-quiescent-current operation - specifically engineered for next-generation ECU, ADAS, and telematics platforms.

FAQ

What is the minimum input voltage required for MPQ2454GH-AEC1-P to regulate 3.3V output at 600mA load?

At 600mA load and 1MHz switching frequency, the MPQ2454GH-AEC1-P maintains regulation within ±5% of 3.3V down to 3.35V input, as verified in Figure 4(a) of the datasheet. This margin accommodates automotive cold-crank events where battery voltage drops to 4.5V, ensuring uninterrupted operation of safety-critical sensors.

Can MPQ2454GH-AEC1-P operate without an external bootstrap diode?

Yes - the device includes an internal bootstrap regulator that charges the BST capacitor from VIN to SW. However, for duty cycles above 65% or switching frequencies above 2MHz, an external Schottky diode (e.g., BAT54) is recommended to reduce BST refresh cycles and maintain <60μA quiescent current under light-load conditions.

How is the power good (POK) delay time calculated for MPQ2454GH-AEC1-P?

The POK delay is set by capacitor C_POKDL on pin 6 using t_DL = (C_POKDL × 1.2V) / I_POKDL, where I_POKDL = 1.8μA typical. For example, a 100nF capacitor yields ~67ms delay. This programmability enables precise sequencing with downstream processors that require defined power-up timing windows.

Does MPQ2454GH-AEC1-P support forced PWM mode, or only pulse-skipping at light loads?

The MPQ2454GH-AEC1-P operates exclusively in current-mode PWM at medium-to-heavy loads and automatically enters pulse-skipping mode at light loads to reduce switching and gate-drive losses. It does not support forced continuous conduction mode (CCM); however, frequency foldback and low 60μA quiescent current ensure high efficiency across the full 1μA–600mA load range.

What thermal derating applies to MPQ2454GH-AEC1-P in MSOP-10 EP package at 85°C ambient?

With θ_JA = 55°C/W and T_J(MAX) = 150°C, maximum allowable power dissipation at 85°C ambient is (150 – 85) / 55 = 1.18W. At 12V input and 3.3V/0.6A output, power loss is ~5.2W × (1 – 90%) = 0.52W - well within derating margin, confirming reliable operation without heatsink in standard 4-layer PCB layouts.

Is the EN/SYNC pin compatible with 3.3V logic levels for automotive microcontroller interfacing?

Yes - the EN/SYNC pin has a logic-high threshold of 1.8V and logic-low threshold of 1V, making it directly compatible with 3.3V GPIO outputs. An internal 1.2MΩ pull-down ensures default disable state when unconnected, and the pin tolerates up to 7.5V clamped internally, allowing direct connection to 5V or 12V domains via current-limiting resistors.

How does frequency foldback improve safety during output short-circuit conditions?

During short-circuit, feedback voltage collapses, causing oscillator frequency to drop to ~20% of nominal (e.g., 200kHz from 1MHz). This reduces peak inductor current and limits power dissipation, preventing thermal runaway while maintaining hiccup-mode operation until fault clears - a key safety feature validated per AEC-Q100 stress testing protocols.