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MAX1587 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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MAX1587 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 32 page  General Description The MAX1586/MAX1587 power-management ICs are optimized for devices using Intel X-Scale™ micro- processors, including third-generation smart cell phones, PDAs, internet appliances, and other portable devices requiring substantial computing and multime- dia capability at low power. The ICs integrate seven high-performance, low-operating- current power supplies along with supervisory and man- agement functions. Regulator outputs include three step- down 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 val- ues. 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 volt- age 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 con- trol for all DC-DC converters, low-battery and dead-bat- tery detection, a reset and power-OK output, a backup- battery input, and a two-wire serial interface. All DC-DC outputs use fast, 1MHz PWM switching and small external components. They operate with fixed-fre- quency PWM control and automatically switch from PWM to skip-mode operation at light loads to reduce operating current and extend battery life. The core out- put is capable of operating in forced-PWM mode at all loads to minimize ripple and noise. A 2.6V to 5.5V input voltage range allows 1-cell lithium-ion (Li+), 3-cell NiMH, or a regulated 5V input. The MAX1587 is avail- able in a tiny 6mm x 6mm, 40-pin thin QFN package. The MAX1586 features an additional linear regulator (V6) for VCC_USIM and low-battery and dead- battery comparators. The MAX1586 is available in a 7mm x 7mm, 48-pin thin QFN package. Applications PDA, Palmtop, and Wireless Handhelds Third-Generation Smart Cell Phones Internet Appliances and Web-Books 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 Components ♦ Tiny 6mm x 6mm, 40-Pin and 7mm x 7mm, 48-Pin Thin QFN Packages High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smart Phones ________________________________________________________________ Maxim Integrated Products 1 Ordering Information MAX1586 MAX1587 V1 V2 V3 V4 V5 V6 V7 VCC_IO 3.3V VCC_MEM 2.5V VCC_CORE 0.8V TO 1.3V VCC_USIM 0V, 1.8V, 3.0V MAIN BATTERY VCC_PLL 1.3V VCC_SRAM 1.1V BACKUP BATTERY IN BKBT MR RSO VCC_BATT POK nRESET nVCC_FAULT SYS_EN PWR_EN ON1-2 ON3-6 nBATT_FAULT DBO Simplified Functional Diagram 19-3089; Rev 1; 12/03 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. EVALUATION KIT AVAILABLE Pin Configurations appear at end of data sheet. PART TEMP RANGE PIN-PACKAGE MAX1586AETM -40°C to +85°C 48 Thin QFN 7mm x 7mm MAX1586BETM -40°C to +85°C 48 Thin QFN 7mm x 7mm MAX1587AETL -40°C to +85°C 40 Thin QFN 6mm x 6mm X-Scale is a trademark of Intel Corp. |
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