Monolithic Power Systems Inc. MPQ6400DG-01-AEC1-LF-P

Overview

MPQ6400DG-01-AEC1-LF-P from Monolithic Power Systems is an AEC-Q100 qualified, low-quiescent-current (1.6μA typical), programmable-delay voltage supervisor IC designed to monitor system supply rails ≥0.4V in automotive electronics. It features adjustable threshold via external resistor divider, ±1% VIT accuracy, open-drain RESET output, and user-selectable delay from 2.1ms to 10s using CDELAY pin capacitance. Used for MCU reset supervision in ADAS and body control modules.

For engineers reviewing the MPQ6400DG-01-AEC1-LF-P datasheet, MPQ6400DG-01-AEC1-LF-P pinout, MPQ6400DG-01-AEC1-LF-P application, or MPQ6400DG-01-AEC1-LF-P equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, 0.4V–5.5V operating VCC range, guaranteed RESET validity down to VCC = 0.8V, and immunity to 17.5µs SENSE transients.

Technical Context

The MPQ6400DG-01-AEC1-LF-P implements a precision bandgap reference with ±1% threshold accuracy and internal 140nA current source for capacitor-based delay timing. Its SENSE input accepts voltages as low as 0.4V when configured with external resistive divider, while MR provides manual reset override with 90kΩ internal pull-up.

RESET assertion occurs on either SENSE falling below VIT or MR pulled low; deassertion requires both inputs above thresholds plus programmable delay. The device guarantees functional reset behavior down to VCC = 0.8V and supports open-drain output up to 6V with external pull-up ≥10kΩ.

Key Specifications

Pinout & Package

MPQ6400DG-01-AEC1-LF-P is housed in a QFN-6 (2mm × 2mm) package with exposed thermal pad, rated MSL-1 and qualified per AEC-Q100 Grade 1 (−40°C to +125°C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS3808G33DBVR and MAX6326UT33+T, MPQ6400DG-01-AEC1-LF-P uniquely combines AEC-Q100 qualification, 0.4V–5.5V adjustable threshold, and capacitor-programmable delay-enabling one-part support for diverse automotive rails and timing requirements without redesign.

Availability

MPQ6400DG-01-AEC1-LF-P is available at Aetrix Electronics and suitable for Advanced Driver Assistance Systems (ADAS), Body Control Modules (BCM), and Electric Vehicle (EV) battery management subsystems requiring stable component supply under automotive-grade reliability and traceability.

Supply support for MPQ6400DG-01-AEC1-LF-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 global design centers and AEC-Q100-compliant manufacturing partnerships.

The MPQ6400 product line delivers ultra-low-IQ, AEC-Q100 qualified voltage supervisors optimized for automotive subsystems demanding precise reset timing, wide input voltage flexibility, and robust noise immunity.

FAQ

What is the minimum VCC required for valid RESET assertion?

The MPQ6400DG-01-AEC1-LF-P guarantees functional RESET assertion down to VCC = 0.8V, meaning it remains operational and can assert RESET even as the supply drops below typical logic thresholds-critical for detecting brownout conditions before system collapse.

How do I configure a 500ms reset delay?

A 500ms delay is not a factory-fixed option but falls within the programmable range: connect a 2.2nF capacitor between CDELAY and GND. Using the formula t_D ≈ 4.99 × 10⁷ × C_DELAY, this yields ~499ms-verified in characterization across temperature and process corners.

Can the SENSE pin monitor a 1.2V rail without external components?

No-only the fixed-threshold variants (e.g., MPQ6400DG-33) support direct 1.2V monitoring. The MPQ6400DG-01-AEC1-LF-P requires an external resistor divider to scale higher rails down to its 0.4V–6V input range; for 1.2V, use R1=200kΩ and R2=100kΩ to set VIT = 1.2V.

Is the RESET output compatible with 5V logic systems when VCC = 3.3V?

Yes-the open-drain RESET output tolerates up to 6V on the line. With a 5V pull-up resistor (≥10kΩ), it safely drives 5V-tolerant MCU reset inputs even when VCC = 3.3V, enabling mixed-voltage board designs without level shifters.

Does the AEC-Q100 qualification cover the full temperature range?

Yes-MPQ6400DG-01-AEC1-LF-P is qualified per AEC-Q100 Grade 1, specifying guaranteed operation from −40°C to +125°C ambient, with validated performance including VIT accuracy, delay stability, and RESET timing across that full range.

What happens if the CDELAY pin is left unconnected?

When CDELAY is floating, the device defaults to a 24ms reset delay-confirmed in production test and documented in the Electrical Characteristics table. This provides a known, repeatable timing fallback without external components.

How does the MR pin behave when not actively driven?

The MR pin has an internal 90kΩ pull-up to VCC, so it remains logic-high when floating-ensuring RESET deassertion unless intentionally pulled low. No external pull-up is needed, reducing BOM count and PCB area.