LPDDR2

LPDDR2 (Low Power Double Data Rate 2 SDRAM) is a JEDEC standard for mobile memory introduced as the successor to LPDDR1. It is a type of synchronous DRAM optimized for low power consumption in portable devices such as smartphones, tablets, and embedded systems. Compared with conventional DDR memory, LPDDR2 reduces power use through lower operating voltages, reduced leakage, and advanced power states, and it emphasizes rapid transitions between active, idle, and standby modes to extend battery life. The interface supports double data rate transfers on clock edges and is designed to be compatible with mobile system-on-chip memory controllers. LPDDR2 offers higher data densities and bandwidth over LPDDR1, enabling larger application working sets while maintaining power efficiency. It commonly supports multiple banks and deep sleep modes, including self-refresh and partial array self-refresh to preserve state with minimal power.

LPDDR2 was standardized in the late 2000s and became common in mid-2010s devices. It provided a practical path toward higher memory capacity without a proportionate increase in power draw, contributing to thinner, lighter, and more capable mobile devices. As mobile memory demands continued to grow, LPDDR2 was gradually supplanted by LPDDR3 and later generations, which offered even higher data rates and lower power.

LPDDR2 remains in use in some older devices and embedded systems, and it is documented in JEDEC's standards as part of the mobile memory family lineage.