Part # LM2608 datasheet

Part Manufacturer: National Semiconductor

National Semiconductor

Part Description: LM2608 400mA Sub-miniature, High Efficiency, Programmable DC-DC Converter with Linear Mode


Part Details:

Mode LM2608 December 2002 400mA LM2608400mA Sub-miniature, High Efficiency, ProgrammableDC-DC Converter with Linear Mode Sub-miniature, General Description Key Specifications The LM2608 step-down DC-DC converter is optimized for n Operates from a single LiION cell (2.8V to 5.5V) powering ultra-low voltage circuits from a single Lithium-Ion n Pin selectable output voltage (1.5V/1.8V or 1.3V/1.5V cell. It provides up to 400mA over an input voltage range of versions), without external feedback resistors 2.8V to 5.5V. Operating from a 1.35V reference, this device n 400mA maximum load capability provides pin-selectable output voltages of 1.3V/1.5V n ±1% PWM mode DC output voltage precision (300mA) for low voltage version or 1.5V/1.8V (400mA) for (Excluding external reference tolerance) high voltage version. This allows adjustment for DSP or CPU n 5mV typ PWM mode output voltage ripple voltage options, as well as dynamic output voltage switching High n 20 µA typ quiescent current (Linear Mode) for reduced power consumption. Internal synchronous recti-fication provides high efficiency. n 0.02µA typ shutdown mode current n Internal synchronous rectification for high efficiency The LM2608 offers superior features and performance for (91% at 2.8V , 1.8V ) Efficiency mobile phones and similar portable applications with com- IN OUT plex power management systems. Pin-selectable PWM low- n 600kHz PWM mode switching frequency noise and linear micropower modes offer improved system n SYNC input for PWM mode frequency synchronization control for maximizing battery life. During full power opera- from 500kHz to 1MHz tion, fixed-frequency PWM mode reduces interference in RF n 15% accuracy for F and I OSC lim and data acquisition applications by minimizing noise har-monics at sensitive IF and sampling frequencies. A SYNC Features , input allows synchronizing the switching frequency in a


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LM2608.pdf Datasheet