As expectations for required functions increase along with the trend toward miniaturization of electronic products, efficiency that implements maximum display performance with minimum power consumption to improve the battery life of devices is expected to play a key role in power management semiconductors.

STMicroelectronics (NYSE: STM), a global semiconductor leader serving customers across the spectrum of electronics applications, today announced a new, fully integrated power-management integrated circuit (PMIC) for AMOLED displays that combines low standby current with improved flexibility to extend battery life in portable devices.

The new STMP30 PMICs feature three integrated DC-DC converters to provide all the power rails required for AMOLED displays in smartphones and other portable devices, with an input voltage range of 2.9 V to 4.8 V.

The 550mA VOUT1 boost converter has an adjustable output voltage, unlike other devices that have a fixed VOUT1 of 4.6V. The voltage can be set in 100mV steps between 4.6V and 5V, optimizing display brightness to minimize power consumption and maximize visibility under all conditions. At up to 5.0V settings, a High-Brightness Mode (HBM) is available for optimal viewing even under bright outdoor lighting.

The remaining two outputs are provided by a 550mA single-phase buck-boost inverting converter programmable from -0.8 V to -6.6 V and a 5.5 V to 7.9 V, 150mA boost converter. The output voltages are programmed using the S-Wire (Sing-Wire) protocol via external pins.

Additionally, this PMIC receives S-Wire messages and operates the AMOLED in Always-On Display (AOD) mode, continuously displaying information on the screen with very low power, thereby enhancing user convenience.

This PMIC also has safety features such as over-temperature protection, input under-voltage protection, and soft-start with inrush current limitation, as well as a full shutdown mode for maximum power savings. In addition, the high-voltage output features a high-speed discharge circuit and provides short-circuit protection.