19-1327; Rev 1; 2/98
KIT ATION EVALU E L B A AVAIL
DAC-Controlled Boost/Inverter LCD Bias Supply with Internal Switch
General Description ____________________________Features
o Internal 500mA, 28V N-Channel Switch (no external FET required) o Adjustable Output
Voltage to +27.
5V or -27.
5V o 6-Bit DAC-Controlled Output
Voltage o Up to 90% Efficiency o Small 16-Pin QSOP Package (Same size as 8-pin SO) o Power-OK Indicator o 65µA Quiescent Current o 1.
5µA Shutdown Current o Up to 300kHz Switching Frequency
MAX686
The MAX686 DAC-controlled boost/inverter IC converts a positive input
voltage to a positive or negative LCD bias
voltage up to +27.
5V or -27.
5V.
The device features an internal N-ch...