Onsemi NCP1597B

Description

The NCP1597B is a fixed 1 MHz, high−output−current, synchronous PWM converter that integrates a low−resistance, high−side P−channel MOSFET and a low−side N−channel MOSFET.The NCP1597B utilizes internally compensated current mode control to provide good transient response, ease of implementation 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 A.The NCP1597B has features including fixed internal switching frequency (FSW), and an internal soft−start to limit inrush current.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 mΩ High−Side Switching P−Channel MOSFET and
• 90 mΩ 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

Typical applications

• Hard Disk Drivers
• LCD TV
• Set−Top Boxes
• Networking Equipment
• USB Power Devices
• Computer Peripherals
• Wireless and DSL/Cable Modem
• DSP Power
• Home Audio

More information

• Datasheet
• IC product information