MAX1585ETJ+ Maxim Integrated Products, MAX1585ETJ+ Datasheet - Page 16

• Manufacturer Part Number: MAX1585ETJ+
• Description: IC DGTL CAM PWR SUP 5CH 32TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX1585ETJ+

• Applications: Controller, Digital Camera
• Voltage - Input: 0.7 ~ 5.5 V
• Number Of Outputs: 5
• Voltage - Output: 1.25 ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 32-TQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

OSC cycles, then all MAX1584/MAX1585 channels latch
off.
The MAX1584/MAX1585 auxiliary PWM controllers have
a guaranteed maximum duty cycle of 80%. In boost
designs that employ continuous current, the maximum
duty cycle limits the boost ratio so that:
5-Channel Slim DSC Power Supplies
Figure 3. AUX Controller Functional Diagrams
16
CC_
OSC
______________________________________________________________________________________
FB_
REF
0.85
REF
REFI
0V TO REF IN 1024 OSC
LEVEL
SHIFT
(REFI RAMPS FROM
SOFT-START
CYCLES)
STEP-UP CONTROLLER
AUX2, MAX1585 AUX1
MAX1584 AUX1 AND
CLK
Maximum Duty Cycle
PROTECTION
FAULT
OSC
CC3
FB3
REF
R
S
Q
ENABLE
0.85
REF
REFI
0V TO REF IN 1024 OSC
LEVEL
SHIFT
(REFI RAMPS FROM
DL_
SOFT-START
CYCLES)
With discontinuous inductor current, no such limit exists
for the input/output ratio since the inductor has time to
fully discharge before the next cycle begins.
AUX1 can be used for conventional DC-DC boost and
flyback designs (Figure 5). Its output (DL1) is designed
MAX1584 AND MAX1585
CC2
OSC
FB2
REF
CLK
AUX3 STEP-DOWN
CONTROLLER
PROTECTION
FAULT
0.85
REF
R
S
REFI
Q
ENABLE
REF TO 0V IN 1024 OSC
LEVEL
SHIFT
(REFI RAMPS FROM
1 - V
SOFT-START
CYCLES)
IN
INVERTING CONTROLLER
/ V
CLK
MAX1585 AUX2
OUT
DL3
PROTECTION
FAULT
≤ 80%
R
S
Q
ENABLE
AUX1
DL2