DESCRIPTION
The MP6908 is a low-drop diode emulator IC
that, when combined with an external switch,
replaces Schottky diodes in high-efficiency
flyback converters. The MP6908 regulates the
forward drop of an external synchronous
rectifier (SR) MOSFET to about 40mV, which
switches off once the voltage becomes negative.
The MP6908 can generate its own supply
voltage for battery charging applications with
potential low output voltage, and at short circuit
output condition, or for high-side SR
configuration. Programmable ringing detection
circuitry prevents the MP6908 from turning on
falsely at Vds oscillations during discontinuous
conduction mode (DCM) and quasi-resonant
operation.
The MP6908 is available in a space-saving
TSOT23-6 package.

FEATURES
 Wide Output Range down to 0V, No Short
Circuit Current Flows through Body Diode
 No Need for Auxiliary Winding for High-Side
or Low-Side Rectification
 Ringing Detection Prevents False Turn-On
during DCM and Quasi-Resonant
Operations
 Works with Standard and Logic Level SR
MOSFETS
 Compatible with Energy Star
 ~30ns Fast Turn-Off and Turn-On Delay
 ~100µA Quiescent Current
 Supports DCM, CCM, and Quasi-Resonant
Operations
 Supports both High-Side and Low-Side
Rectification
 TSOT23-6 Package Available

APPLICATIONS
 USB PD Quick Chargers
 Adaptors
 Flyback Power Supplies with Very Low
and/or Variable Output Voltage