Semiconductor packages that contain a system-in-a-package and methods for making such packages are described. The semiconductor packages contain a first semiconductor die resting on a middle of a land pad array, a second die disposed over the first die and resting on routing leads that are connected to the land pad array, a third die resting on the backside of the second die and connected to the land pad array by wire bonds, and a passive device and/or a discrete device resting on device pads. The packages also contain thermal pads which operate as a heat sink. The land pad array is formed from etching the leadframe. The semiconductor packages have a full land pad array with a thin package size while having a system-in-a-package design. Other embodiments are also described.