MAX17116,pdf (Dual-Output DC/DC Power Supply for AMOLED)

The MAX17116 includes two current-mode 1.4MHz switch mode power-supply (SMPS) regulators for acTIvematrix

organic light-emitTIng diode (AMOLED) displays.

The posiTIve supply is provided by a step-up regulator

with a synchronous recTIfier. The negative supply is

provided by an inverting regulator with a synchronous

rectifier.

The step-up DC-DC converter is a high-accuracy 250mA

regulator with an integrated power MOSFET switch

and synchronous rectifier. The synchronous rectifier

improves efficiency and also provides True ShutdownTM.

Its 4.6V (fixed) output efficiency exceeds 85% at 150mA

from a 3.7V input. A built-in, 7-bit, digital soft-start function controls startup inrush currents.