LT3587
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
TOP VIEW
EN/SS3
EN/SS1
15 FB1
21
14 V
OUT1
13 CAP1
12 GND
11 SW1
6
FB2
7
GND
8
GND
9 10
SW2
NC
V
FB3
I
FB3
V
IN
V
IN
..............................................................................6V
Soft-Start Input Pins
EN/SS1, EN/SS3 .....................................................6V
Feedback Pins
FB1, FB2, I
FB3
, V
FB3
................................. –0.2V to 6V
High Voltage Switch Pins
SW1, SW2, SW3...................................................40V
High Voltage Output Pins
CAP1, CAP3, V
OUT1
, V
OUT3
...................................32V
Bidirectional I/O Pin
FLT
..........................................................................6V
FLT
Current ........................................................10mA
Operating Junction Temperature Range .. –40°C to 125°C
Storage Temperature Range................... –65°C to 125°C
20 19 18 17 16
V
OUT3
1
CAP3 2
SW3 3
GND 4
FLT
5
UD PACKAGE
20-LEAD (3mm 3mm) PLASTIC QFN
θ
JA
= 68°C/W,
θ
JC
= 4.2°C/W
EXPOSED PAD (PIN 21) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3587EUD#PBF
TAPE AND REEL
LT3587EUD#TRPBF
PART MARKING
LDNC
PACKAGE DESCRIPTION
20-Lead (3mm
×
3mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 125°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
VIN
= 3.6V, V
EN/SS1
= V
EN/SS3
= V
VIN
unless otherwise noted (Note 2, 3).
PARAMETER
Operating Input Voltage Range
Quiescent Current
V
EN/SS1
= 0V, V
EN/SS3
= V
VIN
OR
V
EN/SS1
= V
VIN
, V
EN/SS3
= 0V OR
V
EN/SS1
= V
EN/SS3
= V
VIN
Not Switching
V
EN/SS1
= V
EN/SS3
= 0V, In Shutdown
Switching Frequency
Maximum Duty Cycle
Minimum On Time
Power Fault Delay from Any Output to
FLT
FLT
Input Threshold Low
FLT
Leakage Current
FLT
Voltage Output Low
V
FLT
= 5V
I
FLT
= 1mA
l
l
l
l
l
ELECTRICAL CHARACTERISTICS
CONDITIONS
MIN
2.5
TYP
2.4
MAX
6
4
UNITS
V
mA
5.5
0.8
87
1
93
50
16
0.4
1.0
9
1.2
70
1.6
±1
0.4
μA
MHz
%
ns
ms
V
μA
V
3587fc
2
LINER [ LINEAR TECHNOLOGY ]
