Monolithic Power Systems Inc. MP6907GJ-P

Overview

MP6907GJ-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 adapters and offline flyback converters. It regulates external MOSFET conduction to ~70mV forward 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, industrial power supplies, and distributed systems requiring >90% efficiency at light load.

For engineers reviewing the MP6907GJ-P datasheet, MP6907GJ-P pinout, MP6907GJ-P application, or MP6907GJ-P equivalent, key selection criteria include its 25ns turn-off delay for reliable CCM operation, SYNC-controlled gate disable, dual-package availability (TSOT23-6/SOIC8), support for high-side/low-side rectification, and compliance with Energy Star 1W standby requirements.

Technical Context

The MP6907GJ-P implements adaptive synchronous rectification control by sensing V_DS across an external MOSFET and regulating gate drive to maintain ~70mV conduction voltage. Its control loop includes programmable turn-on blanking (~1.6μs) and turn-off blanking (160ns), with a -15mV turn-off threshold and -70mV regulation target.

It integrates a dedicated SYNC input for external CCM shutdown, EN enable logic with 1.74V UVLO, LL pin for light-load timing via external resistor (R_LL), and thermal shutdown at 150°C with 10°C hysteresis. The IC operates with 12V standard or 5V logic-level MOSFETs and supports auxiliary or output-derived VDD supply schemes.

Key Specifications

Pinout & Package

MP6907GJ-P is housed in a 6-pin TSOT23 package (3.0mm × 1.7mm × 0.9mm), optimized for high-density secondary-side placement in compact adapters. Pin functions are validated per MPS datasheet Rev. 1.02 (2017).

Key Features

Applications

Equivalent & Alternatives

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

Compared with NCP4306DR2G and AP4310GMT, MP6907GJ-P uniquely combines sub-100ns turn-off, programmable light-load sleep, and SYNC-driven CCM disable-enabling highest efficiency across full load range in compact TSOT23-6 form factor.

Availability

MP6907GJ-P is available at Aetrix Electronics and suitable for USB-C adapters, industrial flyback PSUs, and distributed telecom power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for MP6907GJ-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP6907 product line targets high-efficiency secondary-side synchronous rectification in offline flyback converters, specifically engineered to replace Schottky diodes while supporting CCM, DCM, and QR operation without external compensation.

FAQ

What is the maximum V_D voltage the MP6907GJ-P can safely sense?

The MP6907GJ-P VD pin is rated for –1V to +180V relative to VSS, verified per Absolute Maximum Ratings table. This allows direct sensing of MOSFET drain in 100V-class flyback secondaries without external clamping, provided layout minimizes ringing via short traces and local RC snubbing.

How does the LL pin affect light-load behavior?

The LL pin sets light-load entry/exit timing via external resistor R_LL: T_LL = 1.95μs × (100kΩ / R_LL). Pulling LL low disables gate drive entirely; leaving it open prevents light-load mode activation. The IC monitors MOSFET conduction period against T_LL to latch off VG and reduce IQ to ~150μA.

Can MP6907GJ-P drive both high-side and low-side MOSFETs?

Yes - the MP6907GJ-P supports both configurations. For high-side placement, VSS connects to transformer secondary ground and VD senses MOSFET drain; for low-side, VSS connects to MOSFET source and VD senses drain. Layout guidelines require separation of VD/VSS sensing loop from power loop in both cases.

What is the purpose of the SYNC pin beyond CCM operation?

Beyond CCM gate disable, the SYNC pin provides a 100μs high-voltage pulse trigger to force light-load mode entry. When pulled >2.12V for >100μs, the IC latches off VG and enters 150μA sleep mode - useful for system-level power sequencing or burst-mode control.

Does MP6907GJ-P require an external bootstrap capacitor?

No - the MP6907GJ-P uses a direct-drive gate driver architecture with internal charge pump for high-side capability in low-side configuration, and no external bootstrap components. VG output swings from 0.1V (low) to 11.7V (high) referenced to VSS, sufficient for standard 5V/12V logic-level MOSFETs.

How is thermal shutdown implemented?

Thermal shutdown activates at 150°C junction temperature, pulling VG low and halting switching. Operation resumes only after junction cools to 140°C (10°C hysteresis), preventing oscillation. This is a silicon-level protection feature, not dependent on external components or layout.

What MOSFET R_DS(ON) is recommended for a 5A output application?

Per MPS application guidance, R_DS(ON) should be ≥7mΩ for 5A output to ensure V_DS remains ≤–70mV during conduction. Lower R_DS(ON) causes premature turn-off due to excessive negative V_DS, increasing switching loss - optimal trade-off balances conduction loss against gate drive energy.