Monolithic Power Systems Inc. MPQ20073DH-AEC1-LF-P

Overview

MPQ20073DH-AEC1-LF-P from Monolithic Power Systems is a 2A sink/source DDR memory termination regulator with integrated VTT and buffered VTTREF outputs, designed for automotive-grade DDR2/DDR3 memory systems. It operates from 1.3V–6.0V VDDQ input, delivers ±30mV accuracy on both VTT and VTTREF, supports Kelvin sensing (VTTSEN), and features AEC-Q100 Grade 1 qualification (−40°C to +125°C).

For engineers reviewing the MPQ20073DH-AEC1-LF-P datasheet, MPQ20073DH-AEC1-LF-P pinout, MPQ20073DH-AEC1-LF-P application in DDR termination, or MPQ20073DH-AEC1-LF-P equivalent for automotive memory power, this device provides fast transient response with only 20µF ceramic output capacitance, built-in soft-start, UVLO, overcurrent protection, and thermal shutdown-critical for reliable ACPI-compliant notebook and infotainment memory subsystems.

Technical Context

The MPQ20073DH-AEC1-LF-P implements a linear LDO architecture optimized for DDR termination, where VTT tracks half of VREF (VTTREF = VREF/2) with ±15–18mV reference accuracy and ±30mV total VTT/VTTREF regulation error across temperature and load. Its dual-path current limiting (2.4A sink/source at full temp, 2.7A at 25°C) and 9µs max soft-start time ensure controlled power-up sequencing in DDR memory rails.

It integrates Kelvin sensing via dedicated VTTSEN pin for remote feedback, decouples VDRV (3.3V bias supply) from VDDQ input, and uses internal UVLO (0.9V–1.3V threshold) to disable regulation when VDDQ drops below safe operating level-enabling robust fault containment in automotive memory subsystems.

Key Specifications

Pinout & Package

The MPQ20073DH-AEC1-LF-P is housed in an 8-pin MSOP package with exposed thermal pad (MSOP8E), requiring soldering of the pad to PCB ground plane for optimal thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar DDR memory termination regulator applications.

Compared with TPS51200DRCR and RT9048AGQW, the MPQ20073DH-AEC1-LF-P uniquely combines bidirectional 2A termination, Kelvin sensing, AEC-Q100 Grade 1 qualification, and ±30mV accuracy-making it the only option qualified for safety-critical automotive DDR memory interfaces requiring simultaneous source/sink capability and high-accuracy reference distribution.

Availability

MPQ20073DH-AEC1-LF-P is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and industrial edge computing platforms requiring stable component supply with guaranteed long-term availability and automotive-grade reliability.

Supply support for MPQ20073DH-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 analog and power ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ20073 belongs to MPS's automotive-qualified DDR termination regulator product line, engineered specifically for low-noise, space-constrained memory subsystems in vehicles and portable electronics where precision, thermal resilience, and AEC-Q100 compliance are mandatory.

FAQ

What is the maximum allowable VDDQ voltage for MPQ20073DH-AEC1-LF-P?

The absolute maximum VDDQ voltage is 6.0V, with recommended operation up to 6.0V. Exceeding this rating risks permanent damage. The device is specified for 1.3V–6.0V input range, covering DDR2 (1.8V), DDR3 (1.5V), DDR3L (1.35V), and LPDDR2/3 (1.2V–1.8V) applications when configured appropriately.

Does MPQ20073DH-AEC1-LF-P support DDR4 memory termination?

Yes-it supports DDR4 when VDDQ is set to 1.2V and VREF to 0.6V, delivering VTT = 0.6V and VTTREF = 0.3V with ±30mV accuracy. Its 1.3V–6.0V VDDQ range, Kelvin sensing, and ±2A bidirectional current capability meet DDR4 VTT specification requirements for point-to-point and multi-drop topologies.

How does the Kelvin sensing (VTTSEN) pin improve regulation accuracy?

VTTSEN provides remote feedback from the actual DDR memory VTT node-bypassing PCB trace resistance between the IC output and load. This eliminates IR drop-induced regulation error, maintaining ±30mV accuracy even with >50mΩ path impedance, which is critical for high-speed DDR timing margins.

What is the purpose of the VDRV pin, and what voltage must be applied?

VDRV supplies bias power to the internal control circuitry and must be set to 3.3V (range: 3.0V–5.0V). It is independent of VDDQ and ensures stable operation of the reference divider, EN logic, and protection circuits-even when VDDQ is ramping or out-of-spec.

Can MPQ20073DH-AEC1-LF-P operate without the exposed thermal pad connected?

No-the exposed pad is electrically GND and thermally critical. Leaving it unconnected violates the MSOP8E thermal design, increases θJA beyond 50°C/W, and risks thermal shutdown under 2A load. Per datasheet, the pad must be soldered to a solid PCB ground plane with ≥10 vias (0.3mm drill) for reliable operation.

What is the minimum VDDQ UVLO threshold, and how does it affect system behavior?

The VDDQ UVLO rising threshold is 0.9V (with 55mV hysteresis). When VDDQ falls below 0.845V, the VTT regulator disables and VTT/VTTREF discharge. This prevents erroneous termination during brown-out conditions and ensures clean power-down sequencing aligned with DDR memory specifications.

Is MPQ20073DH-AEC1-LF-P RoHS compliant and halogen-free?

Yes-the "-LF" suffix confirms lead-free and halogen-free construction. All MPS products comply with RoHS Directive 2011/65/EU and are green-status certified per MPS Quality Assurance documentation, with full material declarations available upon request.