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MAX8588 Datasheet

  • MAX8588

  • 高效率、低IQ PMIC，帶有動(dòng)態(tài)內(nèi)核，用于PDA和智能電話

  • 31頁

  • MAXIM   MAXIM

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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鈩?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 鈥渟leep鈥?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.
Features
鈾?/div>
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
鈾?/div>
Low Operating Current
60碌A(chǔ) in Sleep Mode (Sleep LDOs On)
130碌A(chǔ) with DC-DCs On (Core Off)
200碌A(chǔ) All Regulators On, No Load
5碌A(chǔ) Shutdown Current
鈾?/div>
Optimized for X-Scale Processors
鈾?/div>
Backup-Battery Input
鈾?/div>
1MHz PWM Switching Allows Small External
Components
鈾?/div>
Tiny 6mm x 6mm, 48-Pin Thin QFN Package
MAX8588
Ordering Information
PART
MAX8588ETM
TEMP RANGE
PIN-PACKAGE
-40擄C to +85擄C 48 Thin QFN (6mm x 6mm)
Pin Configuration appears at end of data sheet.
Simplified Diagram
Applications
PDA, Palmtop, and Wireless Handhelds
Third-Generation Smart Cell Phones
Internet Appliances and Web-Books
MAIN BATTERY
BACKUP
BATTERY
IN
MAX8588
V1
V2
V3
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
BKBT
MR
nRESET
nVCC_FAULT
nBATT_FAULT
SYS_EN
PWR_EN
RSO
POK
DBO
ON1-2
ON3-6
V6
V7
V4
V5
X-Scale is a trademark of Intel Corp.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.

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