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LT3591

3591f

PACKAGE/ORDER INFORMATION

ELECTRICAL CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

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

(Note 1)

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.

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.5

LED Current Sense Voltage (VCAP – VLED)VCAP = 24V, ISW = 300mA

●

190

200

210

CAP Pin Bias Current

VCAP = 36V, VLED = 35.8V

µA

LED Pin Bias Current

VCAP = 36V, VLED = 35.8V

µA

Supply Current

VCAP = 24V, VLED = 23V

CTRL = 0V

µA

Switching Frequency

0.75

1.2

MHz

Maximum Duty Cycle

Switch Current Limit

●

500

800

Switch VCESAT

ISW = 300mA

200

Switch Leakage Current

VSW = 24V

0.1

µA

VCTRL for Full LED Current

VCAP = 44V

●

1.5

VCTRL to Shut Down IC

VCTRL to Turn On IC

●

100

CTRL Pin Bias Current

100

CAP Pin Overvoltage Protection

●

Schottky Forward Drop

ISCHOTTKY = 200mA

0.8

Schottky Leakage Current

VR = 30V

µA

TOP VIEW

DDB PACKAGE

8-LEAD (3mm

× 2mm) PLASTIC DFN

VIN

GND

CTRL

LED

CAP

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.

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.

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.

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