The MAX17122 includes a 22V internal-switch step-down regulator for digital logic; a 16.5V internal-switch step-up regulator to power the TFT source drivers; and a temperature-compensated 36V internal-switch boost-buck regulator that produces a negative output which varies according to the temperature sensed by an external NTC thermistor. The GATE output directly drives an external p-channel MOSFET to provide True Shutdown(TM) of the step-up output.
The MAX17122 is available in a 6mm x 6mm, 40-pin TQFN package and operates over the -40 degrees Celsius to +85 degrees Celsius temperature range. Prices star at $1.10 (1000-up, FOB USA)