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MAX1584-MAX1585 Datasheet دیتاشیت PDF دانلود

دیتاشیت - Maxim - 5-Channel Slim DSC Power Supplies

شماره قطعه MAX1584-MAX1585
شرح مفصل 5-Channel Slim DSC Power Supplies
تولید کننده Maxim 
آرم Maxim 


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MAX1584-MAX1585 شرح
19-2883; Rev 0; 7/03
EVAALVUAAILTAIOBNLEKIT
5-Channel Slim DSC Power Supplies
General Description
The MAX1584/MAX1585 provide a complete power-
supply solution for slim digital cameras. They improve
performance, component count, and size compared to
conventional multichannel controllers in 2-cell AA, 1-cell
Li+, and dual-battery designs. On-chip MOSFETs pro-
vide up to 95% efficiency for critical power supplies,
while additional channels operate with external FETs for
optimum design flexibility. This optimizes overall effi-
ciency and cost, while also reducing board space.
The MAX1584/MAX1585 include 5 high-efficiency DC-
DC conversion channels:
• Step-up DC-DC converter with on-chip FETs
• Step-down DC-DC converter with on-chip FETs
• Three PWM DC-DC controllers for CCD, LCD, LED,
or other functions
The step-down DC-DC converter can operate directly
from the battery or from the step-up output, providing
boost-buck capability with a compound efficiency of up
to 90%. Both devices include three PWM DC-DC con-
trollers: the MAX1584 includes two step-up controllers
and one step-down controller, while the MAX1585
includes one step-up controller, one inverting controller,
and one step-down controller. All DC-DC channels
operate at one fixed frequency—settable from 100kHz
to 1MHz—to optimize size, cost, and efficiency. Other
features include soft-start, power-OK outputs, and over-
load protection. The MAX1584/MAX1585 are available
in space-saving, 32-pin thin QFN packages. An evalua-
tion kit is available to expedite designs.
Applications
Digital Cameras
PDAs
Typical Operating Circuit
INPUT
0.7V TO 5.5V
MAX1585
ONSU
ONSD
ON1
ON2
ON3
STEP-UP
STEP-DOWN
AUX1
AUX2
AUX3
SYSTEM +5V
CORE +1.8V
LCD, CCD, LED +15V
CCD -7.5V
LOGIC +3.3V
Features
o Step-Up DC-DC Converter, 95% Efficient
o Step-Down DC-DC Converter
Operate from Battery for 95% Efficient
Step-Down
90% Efficient Boost-Buck with Step-Up
o Three Auxiliary PWM DC-DC Controllers
o No Transformers (MAX1585)
o Up to 1MHz Operating Frequency
o 1mA Shutdown Mode
o Internal Soft-Start Control
o Overload Protection
o Compact 32-Pin Thin QFN Package (5mm x 5mm)
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX1584ETJ
-40°C to +85°C
32 Thin QFN
5mm x 5mm
AUX
FUNCTIONS
2 step-up
1 step-down
MAX1585ETJ
-40°C to +85°C
32 Thin QFN
5mm x 5mm
1 step-up
1 step-down
1 inverting
Pin Configuration
32 31 30 29 28 27 26 25
CC1 1
24 CC2
FB1 2
23 FB2
PGSD 3
22 PVSU
LXSD 4
PVSD 5
MAX1584
MAX1585
21 LXSU
20 PGSU
ONSD 6
19 OSC
CCSD 7
18 SCF
FBSD 8
17 SDOK
9 10 11 12 13 14 15 16
THIN QFN
5mm x 5mm
________________________________________________________________ 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.

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