UCD7231 Overview
The UCD7231 high current driver is specifically designed for digitally-controlled, point-of-load, synchronous buck switching power supplies. Two driver circuits provide high charge and discharge current for the high-side NMOS switch and the low-side NMOS synchronous rectifier in a synchronous buck circuit. The MOSFET gates are driven to +6 V by an internally regulated VGG supply.
UCD7231 Key Features
- Dual High Current Drivers
- Full patibility with TI Fusion Digital Power
- Operational to 2 MHz Switching Frequency
- High-Side FET and Output Current Limit Protection with Independently Adjustable Thresholds
- Fast High-Side Over-Current Sense Circuit with Fault Flag Output
- Prevents Catastrophic Current Levels on a Cycle by Cycle Basis
- Differential High-Gain Current Sense Amplifier
- Voltage Proportional to Load Current Monitor Output
- Wide Input Voltage Range: 4.7 V to 15 V Operation to 2.2 V Input Supported with an External 4.5-6.5 V Bias Supply
- Onboard Regulated Supplies for Gate Drive and Internal Circuits
UCD7231 Applications
- Digitally-Controlled Synchronous-Buck Power Stages for Single- and Multi-Phase Applications