Monolithic Power Systems Inc. MP6907GS-P

Overview

MP6907GS-P from Monolithic Power Systems is a fast turn-off flyback synchronous rectifier controller IC designed to replace Schottky diodes in high-efficiency AC/DC flyback converters. It regulates external MOSFET conduction to maintain ~70mV forward voltage drop, supports CCM/DCM/QR operation modes, features 25ns total turn-off delay, 4.2V–35V VDD range, and programmable light-load sleep mode (~150μA). Used in notebook adapters and industrial flyback power supplies.

For engineers reviewing the MP6907GS-P datasheet, MP6907GS-P pinout, MP6907GS-P application, or MP6907GS-P equivalent, this page delivers verified technical context, SOIC8 package mapping, real-world timing behavior, gate driver interface constraints, and validated alternative selection guidance for synchronous rectifier design.

Technical Context

The MP6907GS-P implements adaptive synchronous rectification control by sensing V_D–V_SS to detect MOSFET body-diode conduction onset and regulate gate drive to clamp forward voltage near –70mV. Its internal blanking circuitry includes 1.6μs turn-on blanking and 160ns turn-off blanking to suppress noise-induced false triggering.

It integrates dual-mode shutdown: EN pin enables/disables operation with ~150μA shutdown current, while SYNC pin provides immediate gate driver disable for reliable CCM operation via >2.12V rising-edge detection. Thermal shutdown activates at 150°C with 10°C hysteresis.

Key Specifications

Pinout & Package

MP6907GS-P is packaged in SOIC8 (8-pin surface-mount) with exposed thermal pad (PGND-connected), optimized for compact flyback secondary-side layout. Pin functions are electrically identical between MP6907GS and MP6907GJ variants, but physical pin count differs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous rectifier controller applications.

Compared with MP6907GS-P, MP6908GS trades light-load flexibility for self-bias capability, while SRK1001 sacrifices CCM robustness and programmability for integration simplicity-making MP6907GS-P the optimal choice for high-efficiency, multi-mode, and standby-critical flyback systems.

Availability

MP6907GS-P is available at Aetrix Electronics and suitable for USB-C notebook adapters, industrial flyback PSUs, battery charger reference designs, and distributed power modules requiring stable component supply across production lifecycles.

Supply support for MP6907GS-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 over two decades of leadership in DC/DC conversion, motor drivers, and power management solutions.

The MP6907 product line targets high-efficiency secondary-side synchronous rectification in flyback topologies, emphasizing fast turn-off, multi-mode adaptability, and ultra-low standby consumption for energy-compliant AC/DC adapters.

FAQ

What is the maximum V_D voltage the MP6907GS-P can safely sense?

The MP6907GS-P supports V_D to V_SS voltages from –1V to +180V per absolute maximum ratings. This enables direct connection to high-voltage secondary windings in universal-input offline flyback converters without external clamping, provided layout minimizes dv/dt-induced noise on the VD trace.

How does the MP6907GS-P achieve 70mV forward voltage regulation?

It senses V_SS–V_D and actively modulates VG to maintain the MOSFET's V_DS near –70mV during conduction. This is not a fixed threshold but a dynamic control loop that adjusts gate drive strength to hold voltage drop constant regardless of load current, minimizing conduction loss.

Can the MP6907GS-P operate in high-side configuration?

Yes. Its separated VSS (signal ground) and PGND (power ground) pins allow high-side placement. VSS serves as the reference for VD and internal comparators, while PGND carries gate driver return current-enabling clean sensing even when MOSFET source is not at system ground.

What is the purpose of the SYNC pin, and what signal levels trigger it?

The SYNC pin accepts an external logic signal to force immediate gate driver disable, ensuring reliable CCM operation. A rising edge exceeding 1.8V (typ. 2.12V) pulls VG low instantly, overriding internal control-commonly driven by primary-side controller timing signals synchronized to the main switch.

How is light-load mode activated and exited?

Light-load mode activates when the MOSFET conduction period falls below T_LL (set by LL resistor) for longer than T_LL-delay (~95µs), latching off VG. It exits when V_DS remains below –250mV for T_LL + 0.25µs, or when SYNC is pulled low after >100µs high pulse-ensuring seamless transition without output disturbance.

Does the MP6907GS-P require an external bootstrap capacitor?

No. The MP6907GS-P uses a direct-drive push-pull gate driver powered from VDD, eliminating bootstrap components. VG swings from <0.1V (low) to 10–13V (high) depending on VDD level, supporting both 5V and 12V logic-level MOSFETs without external charge pumps.

What thermal considerations apply to the SOIC8 package?

SOIC8 has θ_JA = 90°C/W on a 4-layer PCB. At 125°C max junction temperature and 25°C ambient, maximum continuous power dissipation is 1.11W. Layout must use the exposed PGND pad as thermal relief and connect it to ≥2 cm² copper area to sustain full-load operation.