MAX8588 Datasheet, PDF (1/31 Pages) Maxim Integrated Products – High-Efficiency, Low-IQ PMIC with Dynamic Core for PDAs and Smartphones

19-3527; Rev 0; 3/05
High-Efficiency, Low-I_Q PMIC with
Dynamic Core for PDAs and Smartphones
General Description
The MAX8588 power-management IC is optimized for
devices using Intel X-Scale™ microprocessors, includ-
ing 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, memo-
ry, 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 exter-
nal resistors. The CPU core supply is serial pro-
grammed for dynamic voltage management and can
supply up to 0.5A. Linear-regulated outputs are provid-
ed 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 sep-
arate on/off control for all DC-DC converters, low-bat-
tery 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-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 can be forced into PWM mode at all loads to mini-
mize 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.
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
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
♦ Tiny 6mm x 6mm, 48-Pin Thin QFN Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX8588ETM -40°C to +85°C 48 Thin QFN (6mm x 6mm)
Pin Configuration appears at end of data sheet.
Simplified Diagram
MAIN BATTERY
IN
MAX8588
BACKUP
BATTERY
V1
BKBT
V2
V3
MR
nRESET
RSO
V4
nVCC_FAULT
POK
V5
nBATT_FAULT
DBO
SYS_EN
ON1-2
V6
PWR_EN
ON3-6
V7
VCC_IO 3.3V
VCC_MEM 2.5V
VCC_CORE
0.8V TO 1.3V
VCC_PLL 1.3V
VCC_SRAM 1.1V
VCC_USIM
0V, 1.8V, 3.0V
VCC_BATT
X-Scale is a trademark of Intel Corp.
________________________________________________________________ Maxim Integrated Products 1
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