AIC1652
MICROPOWER INVERTING DC/DC CONVERTER
SPEC NO: DS-1652-02 DEC 27, 00
n FEATURES
l l l l l l l
n DESCRIPTION
The AIC1652 is a high performance inverting DC/DC converter, designed to drive an external power switch to generate programmable negative
voltages.
In the particularly suitable LCD bias contrast application, efficiency of 87% can be achieved with low cost PNP bipolar transistor drivers.
Output
voltage can be scaled to -40V or greater by two external resistors.
A pulse frequency modulation scheme is employed to maintain high efficiency conversion under wide input
voltage range.
Quiescent current is about 80µA and can be reduced to 0.
7µA in shutdown mode.
Switching frequency bei...