The RT7291A/B is a synchronous Buck converter with Advanced Constant On-Time (ACOT®) mode control. The main control loop of the RT7291A/B uses an ACOT® mode control which provides a very fast transient response with no external compensators. The RT7291A/B operates from 5V to 23V input voltage, provides a 5V LDO and a 300kHz CLK to drive an external charge pump. OCP, UVP and OVP are included in the RT7291A/B. This IC also provides a 1.5ms internal soft-start function and an open-drain power good indicator.
Feature
- 5V to 23V Input Voltage Range
- Up to 98% Duty for 2S Battery Application
- PWM Frequency Fixed 500kHz
- ACOTTM 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
Applications
- Laptop Computers
- Tablet PCs
- Networking Systems
- Servers
- Personal Video Recorders
- Flat Panel Television and Monitors
- Distributed Power Systems
