LT3591
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
TOP VIEW
V
IN
1
GND 2
NC 3
SW 4
9
8 CTRL
7 LED
6 NC
5 CAP
Input Voltage (V
IN
) ................................................... 12V
CTRL Voltage ........................................................... 12V
SW Voltage .............................................................. 45V
CAP Voltage ............................................................. 45V
LED Voltage ............................................................. 45V
Operating Junction Temperature Range
(Note 2) ...............................................–40°C to 85°C
Maximum Junction Temperature ........................ 125°C
Storage Temperature Range...................–65°C to 150°C
DDB PACKAGE
8-LEAD (3mm
×
2mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 76°C/W
EXPOSED PAD (PIN 9) SHOULD BE CONNECTED TO PCB GROUND
ORDER PART NUMBER
LT3591EDDB
DDB PART MARKING
LCPG
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Operating Voltage
LED Current Sense Voltage (V
CAP
– V
LED
)
CAP Pin Bias Current
LED Pin Bias Current
Supply Current
Switching Frequency
Maximum Duty Cycle
Switch Current Limit
Switch V
CESAT
Switch Leakage Current
V
CTRL
for Full LED Current
V
CTRL
to Shut Down IC
V
CTRL
to Turn On IC
CTRL Pin Bias Current
CAP Pin Overvoltage Protection
Schottky Forward Drop
Schottky Leakage Current
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 3V, V
CTRL
= 3V, unless otherwise specified.
CONDITIONS
V
CAP
= 24V, I
SW
= 300mA
V
CAP
= 36V, V
LED
= 35.8V
V
CAP
= 36V, V
LED
= 35.8V
V
CAP
= 24V, V
LED
= 23V
CTRL = 0V
0.75
92
●
●
MIN
2.5
190
TYP
200
40
20
4
9
1
94
800
200
0.1
MAX
210
80
40
5
11
1.2
UNITS
V
mV
µA
µA
mA
µA
MHz
%
mA
mV
500
I
SW
= 300mA
V
SW
= 24V
V
CAP
= 44V
●
5
50
µA
V
mV
mV
nA
1.5
100
100
40
42
0.8
4
44
●
●
V
V
µA
I
SCHOTTKY
= 200mA
V
R
= 30V
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
The LT3591E is guaranteed to meet performance specifications
from 0°C to 85°C operating junction temperature range. Specifications
over the –40°C to 85°C operating junction temperature range are assured
by design, characterization and correlation with statistical process controls.
3591f
2
LINEAR [ LINEAR INTEGRATED SYSTEMS ]
