Monolithic Power Systems Inc. MP8007HGV-Z

Overview

MP8007HGV-Z from Monolithic Power Systems is a fully integrated IEEE 802.3af-compliant PoE powered device (PD) interface with embedded 13W primary-side regulated flyback or buck DC/DC converter. It integrates detection, classification, 100V hot-swap MOSFET, 180V power switch, and protection circuitry - delivering single-chip front-end power conversion for isolated or non-isolated PoE endpoints. Used in security cameras, VoIP phones, and WLAN access points operating from 36–57V PoE input.

For engineers reviewing the MP8007HGV-Z datasheet, MP8007HGV-Z pinout, MP8007HGV-Z application, or MP8007HGV-Z equivalent, this page provides verified technical context on IEEE 802.3af PD interface behavior, primary-side regulation implementation, 100V/0.48Ω hot-swap FET operation, 3A programmable current limit, and QFN-28 package thermal performance - all critical for PoE-PD BOM consolidation and layout validation.

Technical Context

The MP8007HGV-Z implements dual-mode DC/DC control: fixed peak-current, variable-frequency DCM for flyback (using FB1 feedback with optocoupler-free primary-side regulation) and low-side-switch buck topology (using FB2 referenced to VDD). Its PD interface executes full 802.3af state machine - detection (24.9kΩ signature), classification (programmable via CLASS resistor), inrush limiting (120mA), and 840mA operational current limit - all coordinated by internal logic that gates SW and enables PG only after valid PSE handshake.

Protection architecture includes over-current (fold-back at 10V RTN), over-voltage (FB1 OVP at 120–130% VREF1), open-circuit (FB1 < –20mV), and dual thermal shutdowns (PD section at 150°C, DC/DC section at 150°C, both with 20°C hysteresis). The AUX pin enables seamless wall-adapter ORing by disabling hot-swap FET and forcing T2P/PG high when VDD–AUX > 2.3V.

Key Specifications

Pinout & Package

MP8007HGV-Z is housed in a thermally enhanced QFN-28 (4mm × 5mm) package with exposed thermal pad. Pin 1 is AUX; pins 3, 11, 14, 15, 19, 22, and 28 are no-connect (N/C) and may be tied to GND or thermal pad per layout best practice.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PoE PD interface applications.

Compared with LT4275AIMSE#PBF and TPS23753APWR, MP8007HGV-Z uniquely combines 13W integrated flyback/buck conversion, AUX ORing, and QFN-28 thermal performance - making it optimal for cost-sensitive, space-constrained PoE endpoints where BOM reduction and dual-input flexibility are design priorities.

Availability

MP8007HGV-Z is available at Aetrix Electronics and suitable for security camera deployments, VoIP endpoint manufacturing, and WLAN access point production requiring stable component supply and full 802.3af compliance.

Supply support for MP8007HGV-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 over 20 years of leadership in DC/DC converters, PoE solutions, and motor drivers.

The MP8007H product line targets compact, integrated PoE-PD front-ends for cost-sensitive, high-volume endpoints - emphasizing BOM reduction, thermal robustness, and seamless interoperability with legacy and Type 2 PSEs.

FAQ

What is the maximum input voltage the MP8007HGV-Z can withstand on the VDD pin?

The absolute maximum rating for VDD with respect to VSS is +100V. However, the recommended operating range is 0V to 57V - matching standard 802.3af PoE voltage specifications (36–57V). Operation above 57V risks violating the PD interface's UVLO thresholds and may trigger premature thermal shutdown.

Can the MP8007HGV-Z support IEEE 802.3at (PoE+) operation?

No. While the PD interface supports 802.3at detection and classification signaling, the integrated DC/DC converter is rated for 13W maximum output - aligning strictly with 802.3af Class 3. It cannot deliver the 25.5W minimum required for 802.3at Type 2 operation.

How is primary-side regulation achieved without an optocoupler?

MP8007HGV-Z samples reflected flyback voltage at the SW node during discontinuous conduction mode (DCM) zero-current crossing. The FB1 pin compares this sampled voltage to its internal 1.99V reference, adjusting peak current to maintain constant output - eliminating need for secondary-side feedback components.

What happens when both PoE and wall adapter are present simultaneously?

When VDD–AUX exceeds 2.3V, the IC disables the hot-swap MOSFET and forces PG and T2P high - effectively disconnecting PoE input and enabling wall adapter power delivery. No external diode or controller is needed due to integrated ORing logic.

Is the QFN-28 package lead-free and RoHS compliant?

Yes. MP8007HGV-Z is lead-free, halogen-free, and fully compliant with the EU RoHS directive. The top marking "M8007H" and date code (YWW) are laser-etched on the package per MPS quality assurance standards.

What is the purpose of the T2P pin?

T2P is an open-drain indicator that pulls low when a Type 2 PSE is detected or when AUX mode is enabled. It provides system-level status for firmware to adapt power management - e.g., disabling high-power radios if only Type 1 PSE is present.

How does the ILIM pin affect short-circuit protection?

The resistor connected to ILIM sets the peak switching current limit. During output short, the controller folds back current at 10V RTN and holds SW off for 1ms before retry - limiting fault energy to safe levels per IEC/EN62368-1 Annex G requirements.