Monolithic Power Systems Inc. MP8009AGV-P

Overview

MP8009AGV-P from Monolithic Power Systems is an IEEE 802.3af/at-compliant Power over Ethernet (PoE) powered device (PD) interface IC with integrated flyback/forward controller, 100V hot-swap MOSFET (R_DS(ON) = 0.48Ω), 120mA inrush current limit, 840mA operational current limit, and 32ms soft-start time. It enables single-chip PoE PD power conversion for security cameras and WLAN access points.

For engineers reviewing the MP8009AGV-P datasheet, MP8009AGV-P pinout, MP8009AGV-P application, or MP8009AGV-P equivalent, this page delivers verified technical context, confirmed pin functions, topology-flexible regulation modes (PSR/SSR), thermal shutdown at 150°C, and real-world efficiency curves across 42–57V input.

Technical Context

The MP8009AGV-P integrates dual-domain control: a PoE PD interface implementing full 802.3af/at detection (1.9V DET threshold), classification (28.7Ω → 40.4mA I_CLASS), and 100V/0.48Ω hot-swap FET; plus a flyback/forward controller supporting primary-side regulation (PSR) and secondary-side regulation (SSR) via MODE pin configuration and SENSE-based dithering.

It delivers isolated DC-DC conversion with 250kHz fixed switching frequency, 2A GATE and 0.8A SYNC drivers, 160mV current-sense limit, hiccup-mode OLP/SCP/OVP, and PG/T2P status signaling - all in a QFN-28 (4mm×5mm) package with exposed thermal pad tied to RTN/VSS.

Key Specifications

Pinout & Package

MP8009AGV-P is housed in a thermally enhanced QFN-28 (4mm × 5mm, 0.5mm pitch) package with exposed thermal pad connected to RTN/VSS pins for efficient heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LT4275AIMSE#PBF and TPS23754PWPR, MP8009AGV-P uniquely combines full 802.3af/at compliance, integrated 100V hot-swap FET, and dual-mode (PSR/SSR) controller in one QFN-28 package - reducing solution size by >40% and eliminating external gate drivers and current-sense amplifiers.

Availability

MP8009AGV-P is available at Aetrix Electronics and suitable for security cameras, WLAN access points, IoT gateways, and video telephones requiring stable component supply across industrial temperature ranges (–40°C to +125°C).

Supply support for MP8009AGV-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 two decades of leadership in DC-DC converters, PoE solutions, and motor drivers.

The MP8009A product line targets compact, high-efficiency PoE-powered endpoints - designed to replace multi-chip PD + controller solutions with a single, thermally optimized IC supporting both legacy and next-generation 802.3at infrastructure.

FAQ

What is the maximum input voltage the MP8009AGV-P can withstand on the VDD pin?

The absolute maximum VDD voltage is +100V relative to VSS, but the recommended operating range is 0–57V to comply with IEEE 802.3af/at specifications. Operation above 57V risks violating PoE standard interoperability and may exceed internal clamp ratings under fault conditions.

How does the MODE pin configure PSR versus SSR operation?

When MODE is left floating, the IC defaults to primary-side regulation (PSR) for flyback. To enable secondary-side regulation (SSR), connect MODE to GND through a resistor (value sets dead time). The pin detects voltage levels (0.15V–2.2V) to select among five modes including forward topology settings.

Can the MP8009AGV-P support auxiliary power input from a wall adapter?

Yes - the AUX pin monitors the difference between VDD and VAUX. When VAUX is 2.3V below VDD, the hot-swap FET turns off and classification is disabled, forcing T2P and PG assertion. This allows seamless fallback to adapter power while maintaining regulated output.

What protection features are implemented with hiccup mode?

Overload protection (OLP), short-circuit protection (SCP), and over-voltage protection (OVP) all use hiccup mode: the IC shuts down for 340ms, then attempts restart. This prevents thermal runaway during sustained faults while enabling automatic recovery once the fault clears.

Is the exposed thermal pad electrically active, and how should it be connected?

Yes - the exposed pad is internally connected to RTN and VSS. It must be soldered to a PCB copper pour tied to both RTN and GND nets. This connection provides the primary thermal path (θ_JC = 2°C/W) and ensures safe operation at full load in ambient temperatures up to +70°C.

What is the minimum output diode conduction time required for reliable FB sampling in PSR mode?

The datasheet specifies a minimum diode conduction time of 0.7μs for stable feedback sampling. The FB pin samples the reflected output voltage during this window; shorter conduction times cause inaccurate regulation and potential OVP false trips.

Does the MP8009AGV-P support active-clamp forward topology, and what pins are critical for it?

Yes - active-clamp forward is supported in SSR mode. Critical pins include SYNC (drives clamp MOSFET), MODE (configured for forward dead time), and FB (monitors secondary-side output). The SENSE pin sets clamp timing and OVP threshold via resistor network.