MAX1702B Datasheet, PDF (1/19 Pages) Maxim Integrated Products – Triple-Output Power-Management IC for Microprocessor-Based Systems

19-2448; Rev 0; 4/02
Triple-Output Power-Management IC for
Microprocessor-Based Systems
General Description
The MAX1702B power-management IC supports ARM
Powered^® devices such as the Intel^® PXA210 and
PXA250 microprocessors based on the Intel XScale™
micro-architecture. These devices include PDAs, third-
generation smart cellular phones, internet appliances,
automotive in-dash Telematics systems, and other appli-
cations requiring substantial computing and multimedia
capability at low power.
The MAX1702B integrates three ultra-high-performance
power supplies with associated supervisory and man-
agement functions. Included is a step-down DC-DC con-
verter to supply 3.3V I/O and peripherals, a step-down
DC-DC converter to supply 0.7V to V_IN for the micro-
processor core, and a step-down DC-DC converter to
supply either 1.8V, 2.5V, or 3.3V to power the memory.
Management functions include automatic power-up
sequencing, power-on-reset and manual reset with timer,
and two levels of low-battery detection.
The DC-DC converters use fast 1MHz PWM switching,
allowing the use of small external components. They
automatically switch from PWM mode under heavy loads
to skip mode under light loads to reduce quiescent cur-
rent and maximize battery life. The input voltage range is
from 2.6V to 5.5V, allowing the use of three NiMH cells, a
single Li+ cell, or a regulated 5V input. The MAX1702B is
available in a tiny 6mm x 6mm, 36-pin QFN package and
operates over the -40°C to +85°C temperature range.
Features
o Three Regulators in One Package
Peripherals and I/O Supply: 3.3V at 900mA
µP Core Supply: 0.7V to V_IN at 400mA
Memory Supply: 1.8/2.5/3.3V at 800mA
o Supports Intel PXA210 and PXA250
Microprocessors
o Power-On Reset with Manual Reset Input
o Auto Power-Up Sequencing
o 1MHz PWM Switching Allows Small External
Components
o Low 5µA Shutdown Current
o Tiny 6mm ✕ 6mm, 36-Pin QFN Package
PART
MAX1702BEGX
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
36 6mm x 6mm QFN
Applications
PDA, Palmtop, and Wireless Handhelds
Third Generation Smart Cell Phones
Internet Appliances and Web Books
Automotive In-Dash Telematics Systems
Typical Operating Circuit appears at end of data sheet.
Intel is a registered trademark of Intel Corporation.
XScale is a trademark of Intel Corporation.
ARM and ARM Powered are registered trademarks of ARM
Limited.
TOP VIEW
Pin Configuration
36 35 34 33 32 31 30 29 28
N.C. 1
LBI 2
DBI 3
27 N.C.
26 N.C.
25 INP2
ON2 4
PGM3 5
GND 6
MAX1702B
24 LX2
23 PG2
22 OUTOK
REF 7
21 COMP2
GND 8
20 OUT1
N.C. 9
19 N.C.
10 11 12 13 14 15 16 17 18
6mm x 6mm QFN
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.