MAX1586A Datasheet | Maxim Integrated

Description Features - Six Regulators in One Package: Step-Down DC-DC for I/O at 1.3A Step-Down DC-DC for Memory at 0.9A Step-Down Serial-Programmed DC-DC for CORE Three LDO Outputs for SRAM, PLL, and USIM Always-On Output for VCC_BATT - Low Operating Current 60µA in Sleep Mode (Sleep LDOs On) 130µA with DC-DCs On (Core Off) 200µA All Regulators On, No Load 5µA Shutdown Current - Optimized for X-Scale Processors - Backup-Battery Input - Separate ON Controls for Any Desired Power Sequencing - 1MHz PWM Switching Allows Small External ponents - Tiny 6mm x 6mm, 40-Pin and 7mm x 7mm, 48-Pin Thin QFN Packages MAX1586A/MAX1586B/MAX1587A The MAX1586/MAX1587 power-management ICs are optimized for devices using Intel X-Scale™ microprocessors, including third-generation smart cell phones, PDAs, internet appliances, and other portable devices requiring substantial puting and multimedia capability at low power. The ICs integrate seven high-performance, low-operatingcurrent power supplies along with supervisory and management functions. Regulator outputs include three stepdown DC-DC outputs, three linear regulators, and a seventh always-on output. DC-DC converter outputs power I/O, DRAM, and the CPU core. The I/O supply can be preset to 3.3V or 3.0V, or can be adjusted to other values. The DRAM supply on the MAX1586A and MAX1587A is preset for 1.8V or 2.5V, while the MAX1586B DRAM supply is preset for 3.3V or 2.5V. The DRAM supply on all parts can also be adjusted with external resistors. The CPU core supply is serial programmed for dynamic voltage management. Linear-regulated outputs are provided for SRAM, PLL, and USIM supplies. To minimize sleep-state quiescent current, critical power supplies have bypass “sleep” LDOs that can be activated to minimize battery drain when output current is very low. Other functions include separate on/off control for all DC-DC converters, low-battery and dead-battery detection, a reset and power-OK output, a backupbattery input, and a...