MAX1586A Datasheet, PDF (1/32 Pages) Maxim Integrated Products – High-Efficiency, Low-IQ PMICs with Dynamic Core for PDAs and Smart Phones

19-3089; Rev 1; 12/03
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 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
Pin Configurations appear at end of data sheet.
X-Scale is a 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
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
Ordering Information
PART
MAX1586AETM
MAX1586BETM
MAX1587AETL
TEMP RANGE
-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
40 Thin QFN 6mm x 6mm
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
V6
SYS_EN
ON1-2
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
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