MAX1586A_08 Datasheet, PDF (1/30 Pages) Maxim Integrated Products – High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smart Phones

19-3089; Rev 3; 12/08
EVAALVUAAILTAIOBNLEKIT
High-Efficiency, Low-I_Q PMICs with
Dynamic Core for PDAs and Smart Phones
General Description
The MAX1586/MAX1587 power-management ICs are
optimized for devices using Intel XScale^® microproces-
sors, including Smart Phones, PDAs, internet appli-
ances, and other portable devices requiring substantial
computing and multimedia capability at low power.
The ICs integrate 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, DRAM,
and the CPU core. The I/O supply can be preset to
3.3V or adjusted to other values. The DRAM supply on
the A and C devices 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 pro-
grammed for dynamic voltage management and, on C
devices, can supply up to 0.9A. Linear-regulated out-
puts 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 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 MAX1587 is available 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
Intel XScale is a registered trademark of Intel Corp.
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 0.9A
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 XScale Processors
♦ Backup-Battery Input
♦ 1MHz PWM Switching Allows Small External
Components
♦ Tiny 6mm x 6mm, 40-Pin and 7mm x 7mm, 48-Pin
Thin QFN Packages
Ordering Information
PART
MAX1586AETM
MAX1586BETM
MAX1586CETM
MAX1587AETL
MAX1587CETL
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
48 Thin QFN 7mm x 7mm
48 Thin QFN 7mm x 7mm
48 Thin QFN 7mm x 7mm
40 Thin QFN 6mm x 6mm
40 Thin QFN 6mm x 6mm
Pin Configurations and Selector Guide appear at end of
data sheet.
Simplified Functional Diagram
MAIN BATTERY
IN
MAX1586
BACKUP
MAX1587
BATTERY _BKBT
V1
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
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.