Monolithic Power Systems Inc. MPQ5029GD-AEC1-Z

Overview

MPQ5029GD-AEC1-Z from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified automotive USB Type-C port controller integrating a 25mΩ R_DS(ON) current-limit switch, BC1.2/DCP/QC3.0 charging mode detection, and short-to-battery protection on CC1, CC2, DP, DM, and OUT pins. It delivers 3A continuous output at 5V, supports 5V/9V/12V QC3.0 transitions via ADJ-controlled upstream buck regulation, and provides programmable line drop compensation for 5V rails in vehicle cabin charging ports.

For engineers reviewing the MPQ5029GD-AEC1-Z datasheet, MPQ5029GD-AEC1-Z pinout, MPQ5029GD-AEC1-Z application, or MPQ5029GD-AEC1-Z equivalent, key selection criteria include its ±4kV HBM ESD rating on data and CC pins, hiccup-mode OCP with 2ms on-time/2s off-time, thermal shutdown at 150°C, and dual UVLO thresholds (2.4V and 2.85V) enabling robust cold-crank operation in automotive power systems.

Technical Context

The MPQ5029GD-AEC1-Z implements a dual-stage UVLO architecture: first stage (2.4V) enables ADJ-based upstream voltage regulation to 5.1V, second stage (2.85V) initiates controlled MOSFET turn-on with soft-start. Its QC3.0 compliance relies on DP/DM voltage handshake decoding (e.g., 0.6V/3.3V = 9V, 3.3V/0.6V = 12V) and ADJ-sink current modulation to step output voltage without external DAC or sequencer.

Line drop compensation operates exclusively at 5V input via RDROP resistor programming (260–700mV at 3A), while short-to-battery protection uses internal clamping circuits on all high-voltage I/O pins. The OVP function offers three modes-GND (QC3.0 + auto-OVP), float (DCP only, no OVP), or VCC (DCP only, 5.75V fixed OVP)-selected by OVP pin state.

Key Specifications

Pinout & Package

MPQ5029GD-AEC1-Z is housed in a wettable flank QFN-14 package (2mm × 3mm, 0.5mm pitch) optimized for automotive reflow and automated optical inspection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB charging port controller applications.

Compared with TPS65987D and NCP81239, MPQ5029GD-AEC1-Z uniquely combines AEC-Q100 Grade 1 qualification, autonomous QC3.0/BC1.2/Type-C negotiation, and short-to-battery protection in a single QFN-14 package-enabling standalone, MCU-free charging ports with minimal external components.

Availability

MPQ5029GD-AEC1-Z is available at Aetrix Electronics and suitable for front/rear seat USB-C charging ports, telematics module power interfaces, and infotainment system host ports requiring stable component supply across automotive production lifecycles.

Supply support for MPQ5029GD-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 for automotive, industrial, and computing applications.

The MPQ5029 belongs to MPS's automotive-qualified USB power controller product line, designed specifically to replace discrete USB switch + charger ID IC solutions with single-chip, AEC-Q100-compliant functionality for in-vehicle charging systems.

FAQ

What is the purpose of the ADJ pin in MPQ5029GD-AEC1-Z?

The ADJ pin sinks a controlled current (up to 500µA) from the feedback node of an upstream buck converter to regulate output voltage. It enables precise 5.1V default setting, smooth 5V→9V→12V QC3.0 transitions, and programmable line drop compensation-all without external DAC or microcontroller intervention.

How does MPQ5029GD-AEC1-Z handle short-to-battery faults on CC1/CC2 pins?

The MPQ5029GD-AEC1-Z integrates dedicated clamp circuitry on CC1 and CC2 pins rated for ±24V absolute maximum. During a 12V battery short, internal diodes and current limiters prevent latch-up and protect internal logic, maintaining functional integrity while downstream VBUS remains disabled.

Can MPQ5029GD-AEC1-Z operate with a 14V input from a buck converter?

Yes. The MPQ5029GD-AEC1-Z accepts 3.6–12V inputs for QC3.0 operation and has a 22V absolute maximum rating on IN. When used with a 14V upstream rail, it must be configured in DCP-only mode (OVP pin floated or tied to VCC) to avoid triggering OVP, as 14V exceeds the 12V QC3.0 upper limit.

What is the minimum ILIM resistor value for 3A current limit in Type-C mode?

Based on the ILIMIT1 curve (3.18–3.93A at RILIM = 1.78kΩ), a 1.78kΩ resistor achieves 3.55A typical current limit in Type-C mode. To guarantee ≥3A minimum across temperature and process variation, use 1.78kΩ ±1% metal film resistor; values below 1.6kΩ risk exceeding safe SOA limits.

Does MPQ5029GD-AEC1-Z support USB Power Delivery (PD) protocol?

No. MPQ5029GD-AEC1-Z supports USB Type-C physical layer (CC1/CC2 detection, VCONN, DFP role) and QC3.0/BC1.2 charging protocols only. It lacks USB PD PHY, BMC decoder, or policy engine required for PD communication; USB PD requires separate PD controller like MPQ5032 or TPS65988.

How is thermal shutdown managed when using the NTC pin?

The NTC pin monitors external thermistor voltage; at 80°C (with R3=16.6kΩ, R4=1.66kΩ), VNTC drops to 6–12% of VCC, triggering thermal derating. Recovery occurs at 60°C (VNTC ≥16.5% VCC). This analog thermal loop operates independently of digital shutdown at 150°C, enabling proactive current reduction before junction overheating.

What happens to VBUS during OVP event recovery?

During OVP recovery, the MPQ5029GD-AEC1-Z holds VBUS off until VIN falls below 5.45V (typical recovery threshold), then re-enables the power MOSFET with internal soft-start. Input discharge resistors (150–250Ω) actively pull VIN to ground during high-to-low transitions, ensuring sub-500ms recovery time after overvoltage removal.