The MAX8588 power-management IC is optimized for
devices using Intel X-Scale® microprocessors, including
smartphones, PDAs, internet appliances, and other
portable devices requiring substantial computing and
multimedia capability at low power.
The IC integrates seven high-performance, low-operating current
power supplies along with supervisory and
management functions. Included are three step-down
DC-DC outputs, three linear regulators, and a seventh
always-on output. DC-DC converters power I/O, memory,
and the CPU core. The I/O supply can be preset to
3.3V or adjusted to other values. The DRAM supply is
preset for 3.3V or 2.5V, or it can be adjusted with external
resistors. The CPU core supply is serial programmed
for dynamic voltage management and can
supply up to 0.5A. Linear-regulated outputs are provided
for SRAM, PLL, and USIM supplies.
To minimize quiescent current, critical power supplies
have bypass "sleep" LDOs that can be activated 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 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-frequency
PWM control and automatically switch from
PWM to skip-mode operation at light loads to reduce
operating current and extend battery life. The core output
can be forced into PWM mode at all loads to minimize
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 MAX8588 is available in a tiny 6mm x 6mm,
48-pin thin QFN package.
Key Features
Applications/Uses
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
Up to 0.5A
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
1MHz PWM Switching Allows Small External
Components
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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