1.5 A 560 kHz−1.0 MHz Boost Regulator

The NCP5173 is a switching regulator with a high efficiency, 1.5 A integrated switch. It runs at a base frequency of 560 kHz and can be synchronized to an external clock up to 1.0 MHz. This part operates over a wide input voltage range, from 2.7 V to 30 V. The flexibility of the design allows the chip to operate in most power supply configurations, including boost, flyback, forward, inverting, and SEPIC. The IC uses current mode architecture, which allows excellent load and line regulation, as well as a practical means for limiting current. Combining high frequency operation with a highly integrated regulator circuit results in an extremely compact power supply solution. The circuit design includes provisions for features such as frequency synchronization, shutdown, and feedback controls for positive voltage regulation.

FEATUREs
• Integrated Power Switch: 1.5 A Guaranteed
• Wide Input Range: 2.7 V to 30 V
• High Frequency Allows for Small Components
• Minimum External Components
• Easy External Synchronization
• Built−in Overcurrent Protection
• Frequency Foldback Reduces Component Stress During an Overcurrent Condition
• Thermal Shutdown with Hysteresis
• Low 1.0 mm Maximum Profile
• Shut Down Current: 50 μA Maximum

APPLICATIONs
• Flat Panel Displays
• Systems Requiring Low Profile Components