General Description
The RT7786LEC series is specifically designed to work
with controllers, such as RT7207, so as to provide a
total solution for the USB PD or the programmable
power adapter. The RT7786LEC is able to achieve the
high efficiency performance, meet safety standards,
and consume low standby power, which is normally
less than 30mW in a 5V standby condition.
The RT7786LEC offers several innovative features in
order to provide a solution having the wide-range
output voltages. By using the DMAG pin, the
RT7786LEC senses output voltages to adjust the loop
gain for system stability, to adjust the output
over-voltage protection threshold voltage for external
device protection, and to adjust the current limit to meet
Limited Power Source (LPS) safety requirements.
The RT7786LEC is also equipped with comprehensive
protection features, including brown-in/brown-out
protection, VDD over-voltage protection (VDD OVP),
output over-voltage/under-voltage protection (Output
OVP/UVP), secondary rectifier short-circuit protection
(SRSP), and external over-temperature protection
(External OTP). For an application with constant output
power regulation, a resistor connected to CS pin can be
used to achieve the accurate line compensation across
the universal input voltage range. The RT7786LEC
also provides various features to protect against
failures occurring at the secondary-side component,
such as the RT7207 or a shunt regulator.
The RT7786LEC and the RT7207 can be used
together to realize a robust and safe design preventing
all potential fault scenarios, due to versatile and
unknown connections of various devices, cables, plugs
and receptacles.

Features
 Optimized for Adaptive Output Power
 Wide VDD Range : 10V to 32V
 Adaptive Over-Current Protection
 Adaptive Loop Gain Control for Loop Stability
 High Efficiency
 Green Mode Operation at Light Load or No
Load
 Comprehensive Protection Features
 Brown-In and Brown-Out Protection
 VDD Over-Voltage Protection
 Output Over-Voltage and Under-Voltage
Protection
 External Over-Temperature Protection
 Secondary Rectifier Short-Circuit Protection
 Programmable Line Compensation
 Others
 < 30mW in 5V Standby Mode for Power Saving
 Driver Capability : 300mA/300mA
 SmartJitterTM Technology

Applications
 USB PD
 Programmable Power Adapters