MAX8588ETM+

The MAX8588ETM+ from Analog Devices is a power management integrated circuit (PMIC) designed for devices utilizing Intel X-Scale microprocessors, including smartphones, PDAs, and internet appliances. It offers substantial computing and multimedia capabilities at low power consumption.

This IC integrates seven power supplies: three step-down DC-DC converters and three linear regulators, plus an always-on output. The DC-DC converters are used for I/O, memory, and the CPU core, with the core supply being serial programmed for dynamic voltage management up to 0.5A. Linear regulators provide outputs for SRAM, PLL, and USIM supplies. The device operates with a 1MHz PWM switching frequency, allowing for small external components and automatically switching to skip-mode at light loads to conserve power.

The MAX8588ETM+ supports a wide input voltage range of 2.6V to 5.5V, suitable for 1-cell lithium-ion batteries or regulated 5V inputs. It features low operating currents, including 60µA in sleep mode and 5µA shutdown current. The IC is available in a compact 6mm x 6mm, 48-pin thin QFN package, making it ideal for space-constrained portable applications.

Key features include separate on/off control for DC-DC converters, low-battery and dead-battery detection, a reset and power-OK output, and a two-wire serial interface for management functions. Its design prioritizes low quiescent current and extended battery life.