General Description
The RT7753GCS series is specifically designed to
work with controllers, such as RT7202, to provide a
total solution for the USB Power Delivery (USB PD) or
a programmable power adapter. This RT7753GCS not
only provides a control scheme of high power efficiency,
but also gives a very low standby power control below
50mW when under the 5V standby condition.
The RT7753GCS is such a special design to achieve a
wide-range of output voltage by utilizing several
innovations, including (1) By using the DMAG pin, the
RT7753GCS senses the output voltage to adjust the
loop gain for system stability, to adjust the threshold
voltage of the output over-voltage protection, to protect
external devices, and to adjust the current limit to meet
Limited Power Source (LPS) safety requirements; (2)
The RT7753GCS is also equipped with comprehensive
protection features, including Bulk-Capacitor 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); (3) For
constant output power regulation, a resistor connected
to CS pin can be used to achieve an accurate line
compensation across the universal input voltage range;
and (4) The RT7753GCS also provides various
features to protect against any failures occurring at the
secondary-side component, such as the RT7202 or a
shunt regulator.
In applications, the RT7753GCS is suggested to use
with a secondary controller RT7202 to realize a robust
and safe design so as to prevent all potential fault
conditions due to misconnection of various devices,
cables, plugs or receptacles.

Features
 Optimized for Adaptive Output Power
 Wide VDD Range : 9V to 42V
 Adaptive Output Over-Voltage Protection
 Adaptive Over-Current Protection
 Adaptive Loop Gain Control for Loop Stability
 High Efficiency
 Green Mode Operation at Light Load and No
Load
 Comprehensive Protection Features
 Bulk-Capacitor 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
 < 50mW in 5V Standby Mode for Power Saving
 Driver Capability : 300mA/300mA
 SmartJitterTM Technology

Applications
 USB PD and Programmable Power Adapters