LT3591 查看數據表（PDF） - Linear Technology
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LT3591 Datasheet PDF : 16 Pages
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LT3591
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Voltage (VIN) ................................................... 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
PACKAGE/ORDER INFORMATION
TOP VIEW
VIN 1
8 CTRL
GND 2
7 LED
9
NC 3
6 NC
SW 4
5 CAP
DDB PACKAGE
8-LEAD (3mm × 2mm) PLASTIC DFN
TJMAX = 125°C, θJA = 76°C/W
EXPOSED PAD (PIN 9) SHOULD BE CONNECTED TO PCB GROUND
ORDER PART NUMBER DDB PART MARKING
LT3591EDDB
LCPG
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 3V, VCTRL = 3V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Minimum Operating Voltage
2.5
V
LED Current Sense Voltage (VCAP – VLED)
CAP Pin Bias Current
LED Pin Bias Current
Supply Current
VCAP = 24V, ISW = 300mA
VCAP = 36V, VLED = 35.8V
VCAP = 36V, VLED = 35.8V
VCAP = 24V, VLED = 23V
CTRL = 0V
● 190
200
210
mV
40
80
µA
20
40
µA
4
5
mA
9
11
µA
Switching Frequency
0.75
1
1.2
MHz
Maximum Duty Cycle
92
94
%
Switch Current Limit
● 500
800
mA
Switch VCESAT
Switch Leakage Current
VCTRL for Full LED Current
VCTRL to Shut Down IC
VCTRL to Turn On IC
CTRL Pin Bias Current
ISW = 300mA
VSW = 24V
VCAP = 44V
200
mV
0.1
5
µA
● 1.5
V
50
mV
● 100
mV
100
nA
CAP Pin Overvoltage Protection
● 40
42
44
V
Schottky Forward Drop
Schottky Leakage Current
ISCHOTTKY = 200mA
VR = 30V
0.8
V
4
µA
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
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