5A, 18V, 700kHz ACOTTM Synchronous Step-Down
Converter with VID Control
The RT6203B is an adaptive on-time mode synchronous
Buck converter. The main control loop of the RT6203B
uses an adaptive on-time mode control which provides a
very fast transient response with no external components.
The RT6203B operates from 4.5V to 18V VIN input. After
the initial power-up, the output voltage can be changed by
codes sent into the IC via an I2C compatible VID control
bus. There are special codes which can be used to program
current limit level and thermal shutdown level. Shutdown
and startup can be also programmed by special codes.
The device also features an adjustable soft-start time.
Output voltage is adjustable by resistor divider through
the FB pin between 0.8V to 8V.
VID Control Range Via I2C Compatitable Interface :
0.72V to 1.48V in 10mV Steps
Adjustable Current Limit
Adjustable Thermal Shutdown
Fast Transient Response
Adjustable Output Voltage from 0.8V to 8V
Steady 700kHz Switching Frequency
Optimized for All Ceramic Capacitors
Externally-Adjustable, Pre-Biased Compatible Soft-
Input Under-Voltage Lockout
Output Over- and Under-Voltage Protection
Power Good Output
RoHS Compliant and Halogen Free
20 19 18 17 16
6 7 8 9 10
Industrial and Commercial Low Power Systems
LCD Monitors and TVs
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Simplified Application Circuit
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS6203B-01 July 2017
is a registered trademark of Richtek Technology Corporation.