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MAX1585

Description
5-Channel Slim DSC Power Supplies
File Size508KB,29 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Compare View All

MAX1585 Overview

5-Channel Slim DSC Power Supplies

19-2883; Rev 0; 7/03
KIT
ATION
EVALU
BLE
AVAILA
5-Channel Slim DSC Power Supplies
General Description
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)
MAX1584/MAX1585
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.
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
32 Thin QFN
5mm x 5mm
AUX
FUNCTIONS
2 step-up
1 step-down
1 step-up
1 step-down
1 inverting
MAX1584ETJ
-40°C to +85°C
32 Thin QFN
MAX1585ETJ
-40°C to +85°C
5mm x 5mm
Applications
GND
CC3
DL1
Pin Configuration
INDL2
25
24
23
22
CC2
FB2
PVSU
LXSU
PGSU
OSC
SCF
SDOK
21
20
19
18
17
9
ON1
10
ON2
11
ON3
12
ONSU
13
REF
14
FBSU
15
CCSU
16
AUX1OK
DL3
DL2
27
FB3
PV
26
Digital Cameras
PDAs
32
31
30
29
28
Typical Operating Circuit
CC1
FB1
PGSD
LXSD
1
2
3
4
5
6
7
8
INPUT
0.7V TO 5.5V
MAX1585
STEP-UP
STEP-DOWN
ONSU
ONSD
ON1
ON2
ON3
AUX1
AUX2
AUX3
SYSTEM +5V
CORE +1.8V
LCD, CCD, LED +15V
CCD -7.5V
LOGIC +3.3V
PVSD
ONSD
CCSD
FBSD
MAX1584
MAX1585
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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Description 5-Channel Slim DSC Power Supplies 5-Channel Slim DSC Power Supplies 5-Channel Slim DSC Power Supplies
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