General Description

The RT7290A is a synchronous Buck converter with

Advanced Constant On-Time (ACOT® ) mode control. The

main control loop of the RT7290A uses an ACOT® mode

control which provides a very fast transient response with

no external compensators. The RT7290A operates from

5V to 23V input voltage, provides a 3.3V LDO and a 300kHz

CLK to drive an external charge pump. OCP, UVP and

OVP are included in the RT7290A. This IC also provides

a 1.5ms internal soft-start function and an open-drain power

good indicator.

Applications

 Laptop Computers

 Tablet PCs

 Networking Systems

 Servers

 Personal Video Recorders

 Flat Panel Television and Monitors

 Distributed Power Systems

Features

 5V to 23V Input Voltage Range

 PWM Frequency Fixed 500kHz

 ACOT® Mode Performs Fast Transient Response

 Integrated MOSFETs

 31mΩ of High-Side MOSFET

 20mΩ of Low-Side MOSFET

 Support Output MLCC Stable

 Internal Soft-Start (1.5ms typ)

 Built-in OVP/UVP/OCP

 Power Good Indicator

 Fixed 300kHz VCLK to Support Charge Pump

 Individual EN for PWM and LDO

 Thermal Shutdown