LM2773 Low-Ripple 1.
8V/1.
6V Spread-Spectrum Switched Capacitor Step-Down Regulator
January 22, 2008
LM2773 Low-Ripple 1.
8V/1.
6V Spread-Spectrum Switched Capacitor Step-Down Regulator
General Description
The LM2773 is a switched capacitor step-down regulator that produces a selectable 1.
8V or 1.
6V output.
It is capable of supplying loads up to 300mA.
The LM2773 operates with an input
voltage from 2.
5V to 5.
5V, accommodating 1-cell Li-Ion batteries and chargers.
The LM2773 utilizes a regulated charge pump with gains of 2/3x and 1x.
It has very low ripple and noise on both the input and output due to its pre-regulated 1.
15MHz (typ.
) switching frequency and spread spectrum operation.
When outp...