Monolithic Power Systems Inc. MP8007HGV-P

Overview

MP8007HGV-P from Monolithic Power Systems is a fully integrated IEEE 802.3af-compliant PoE powered device (PD) interface with primary-side regulated flyback or buck DC/DC converter, delivering up to 13W output. It integrates PD detection (24.9kΩ signature), classification (28.15mA with 41.2Ω resistor), 100V hot-swap MOSFET (0.48Ω R_ON), and an 180V internal power switch. Used in security cameras and VoIP phones requiring single-chip PoE front-end + regulation.

For engineers reviewing the MP8007HGV-P datasheet, MP8007HGV-P pinout, MP8007HGV-P application, or MP8007HGV-P equivalent, this page delivers verified electrical parameters, validated package mapping (QFN-28, 4mm×5mm), confirmed pin functions per MPS Rev. 1.0 datasheet, and real-world design implications for PoE-PD system integration, thermal management, and auxiliary adapter ORing.

Technical Context

The MP8007HGV-P implements dual-mode DC/DC control: fixed peak-current, variable-frequency DCM for primary-side regulated flyback (no optocoupler required) and low-side-switch buck for non-isolated designs. Its PD interface executes full 802.3af detection (1.9–11V thresholds), classification (11.8–23V hysteresis), and inrush limiting (120mA) before enabling the converter via PG signal.

Internal protection includes over-current (840mA PD limit, 2.05A switching limit), over-voltage (FB1 OVP at 125% V_REF1), open-circuit (FB1 < –60mV), and thermal shutdown (150°C with 20°C hysteresis). MODE pin selects topology; ILIM sets peak current via external resistor; AUX enables wall-adapter ORing when V_DD–V_AUX > 2.3V.

Key Specifications

Pinout & Package

MP8007HGV-P is housed in a thermally enhanced QFN-28 package (4mm × 5mm, 0.5mm pitch) with exposed thermal pad connected to GND. Pin numbering follows top-view layout; N/C pins (3, 11, 14, 15, 19, 22, 28) must be tied to GND or thermal pad per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT4275AIMSE#PBF and TPS23753APWPR, MP8007HGV-P uniquely combines 802.3af PD interface, 180V integrated switch, dual flyback/buck topology, and AUX ORing in one QFN-28 package - reducing total component count by ≥12 and enabling smallest-footprint 13W PoE-PD designs.

Availability

MP8007HGV-P is available at Aetrix Electronics and suitable for security camera deployments, VoIP infrastructure upgrades, and industrial IoT gateways requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

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

The MP8007 product line targets cost-sensitive, space-constrained PoE-PD applications demanding integrated front-end + regulation - designed specifically to replace multi-chip solutions in 13W IEEE 802.3af systems.

FAQ

What is the maximum PoE input voltage supported by MP8007HGV-P?

The MP8007HGV-P supports PoE input voltages from 35V to 57V, with absolute maximum ratings up to 100V on VDD and RTN pins. Its 100V hot-swap MOSFET and 180V internal power switch ensure safe operation across the full IEEE 802.3af range, including worst-case 57V PSE output with cable drop compensation.

How does the MP8007HGV-P implement primary-side regulation without an optocoupler?

It uses FB1 feedback sampling during discontinuous conduction mode (DCM) valley switching. The IC monitors the reflected secondary voltage across the primary winding via FB1, detecting zero-crossing and regulating output based on the sampled voltage magnitude - eliminating need for optocoupler, TL431, and associated bias network.

Can MP8007HGV-P be used in 802.3at (PoE+) applications?

No. While its PD interface supports 802.3at detection and classification, the integrated DC/DC converter is rated for 13W maximum output - matching only 802.3af Class 3. For 802.3at (up to 30W), a higher-power converter stage or external controller is required.

What is the purpose of the AUX pin, and how is it configured?

The AUX pin detects wall adapter presence. When V_DD–V_AUX exceeds 2.3V, the IC disables the PoE hot-swap MOSFET, asserts PG and T2P, and enables the DC/DC converter - allowing seamless ORing between PoE and local 12V supply without external diodes or controllers.

How is the switching current limit programmed on MP8007HGV-P?

Connect ILIM pin to GND through a resistor. A 53.6kΩ resistor sets 2.05A typical peak current (per datasheet Figure 29). The relationship is linear: R_ILIM = (2.05A / I_{LIM_SET}) × 53.6kΩ. This directly scales transformer peak flux and OCP threshold.

Does MP8007HGV-P require external components for EMI compliance?

Yes. While integrated features reduce component count, a common-mode choke, Y-capacitors (line-to-ground), and proper PCB layout (minimized SW loop area, grounded thermal pad) are mandatory to meet FCC Class B conducted/emission limits. The datasheet's EV8007H-V-00A reference design validates this approach.

What thermal derating applies above 25°C ambient?

With θ_JA = 40°C/W (QFN-28 on 2-layer board), power dissipation must be reduced by 25mW/°C above 25°C to maintain ≤125°C junction temperature. At 70°C ambient, max continuous power drops to 2.2W - requiring careful thermal design or forced air for full 13W output.