MAX1888 Datasheet, PDF (1/7 Pages) Maxim Integrated Products – Low-Cost Integrated Offset Logic for Notebook CPU Power Supplies

19-2189; Rev 1; 2/02
Low-Cost Integrated Offset Logic
for Notebook CPU Power Supplies
General Description
The MAX1888 is a three-input decoder with three open-
drain outputs. It is used with the MAX1718 or a similar
DC-to-DC controller to offset the CPU core voltage in
notebook computers. Designed to interface with low-
voltage logic, the MAX1888 can program the controller
for three independent offsets. The circuit is extremely
low cost and is available in an 8-pin µMAX package.
Features
o Simple, Low-Cost Offset Voltage Control
for CPU Core Power Supplies
o IMVP II Logic Interface
o 3V to 5.5V Supply Voltage
o Low 30µA (max) Supply Current
o 8-Pin µMAX Package
Applications
CPU Core Supplies for Intel IMVP II Notebook
Computers
PART
MAX1888EUA
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µMAX
Minimal Operating Circuit
INPUT
SUPPLY
LOW-
VOLTAGE
LOGIC
INPUTS
V_CC
MAX1888
DPSLP
BSM
PERF
PSM
SUS
BOM
GND
POS
OFFSET
ADJUST
NEG
OPEN-DRAIN
DECODER
OUTPUTS
TOP VIEW
Pin Configuration
DPSLP 1
PERF 2
SUS 3
GND 4
MAX1888
µMAX
8 V_CC
7 BSM
6 PSM
5 BOM
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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.