Description
The NCP1597A family are fixed 1 MHz, high−output−current, synchronous PWM converters that integrate a low−resistance, high−side P−channel MOSFET and a low−side N−channel MOSFET. The NCP1597A utilizes current mode control to provide fast transient response and excellent loop stability. It regulates input voltages from 4.0 V to 5.5 V down to an output voltage as low as 0.8 V and is able to supply up to 2.0 A.
The NCP1597A includes an internally fixed switching frequency (FSW), and an internal soft−start to limit inrush currents. Using the EN pin, shutdown supply current is reduced to 3 A maximum.
Other features include cycle−by−cycle current limiting, short−circuit protection, power saving mode and thermal shutdown.
Features
• Input Voltage Range: from 4.0 V to 5.5 V
• Internal 140 m High−Side Switching P−Channel MOSFET and 90 m Low−Side N−Channel MOSFET
• Fixed 1 MHz Switching Frequency
• Cycle−by−Cycle Current Limiting
• Overtemperature Protection
• Internal Soft−Start
• Start−up with Pre−Biased Output Load
• Adjustable Output Voltage Down to 0.8 V
• Power Saving Mode During Light Load
• These are Pb−Free Devices
Applications
• DSP Power
• Hard Disk Drivers
• Computer Peripherals
• Home Audio
• Set−Top Boxes
• Networking Equipment
• LCD TV
• Wireless and DSL/Cable Modem
• USB Power Devices
(Picture:Pinout / Diagram)
