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LT3497

3497f

ELECTRICAL CHARACTERISTICS

PACKAGE/ORDER INFORMATION

ABSOLUTE MAXIMUM RATINGS

Input Voltage (VIN) ...................................................10V

SW1, SW2 Voltages ..................................................35V

CAP1, CAP2 Voltages................................................35V

CTRL1, CTRL2 Voltages............................................10V

LED1, LED2 Voltages ................................................35V

Operating Temperature Range ................. –40°C to 85°C

Maximum Junction Temperature .......................... 125°C

Storage Temperature Range................... –65°C to 125°C

(Note 1)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.5

LED Current Sense Voltage (VCAP1 – VLED1)VCAP1 = 16V

●

190

200

210

LED Current Sense Voltage (VCAP2 – VLED2)VCAP2 = 16V

●

190

200

210

Offset Voltage (VOS) Between

(VCAP1 – VLED1) – (VCAP2 – VLED2) Voltages

VOS = |(VCAP1 – VLED1) – (VCAP2 – VLED2)|

CAP1, LED1 Pin Bias Current

VCAP1 = 16V, VLED1 = 16V

µA

CAP2, LED2 Pin Bias Current

VCAP2 = 16V, VLED2 = 16V

µA

VCAP1, VLED1 Common Mode Minimum Voltage

2.5

VCAP2, VLED2 Common Mode Minimum Voltage

2.5

Supply Current

VCAP1 = VCAP2 = 16V, VLED1 = VLED2 = 15V,

VCTRL1 = VCTRL2 = 3V

8.5

VCTRL1 = VCTRL2 = 0V

µA

Switching Frequency

1.8

2.3

2.8

MHz

Maximum Duty Cycle

Converter 1 Switch Current Limit SW1

●

300

400

Converter 2 Switch Current Limit SW2

●

300

400

Converter 1 VCESAT

ISW1 = 200mA

200

Converter 2 VCESAT

ISW2 = 200mA

200

Switch 1 Leakage Current

VSW1 = 16V

0.1

µA

Switch 2 Leakage Current

VSW2 = 16V

0.1

µA

TOP VIEW

DDB PACKAGE

10-LEAD (3mm

× 2mm) PLASTIC DFN

LED1

CTRL1

GND

CTRL2

LED2

CAP1

SW1

VIN

SW2

CAP2

TJMAX = 125°C, θJA = 76°C/W, θJC = 13.5°C/W

EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB

ORDER PART NUMBER

DDB PART MARKING

LT3497EDDB

LCGT

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, VCTRL1 = VCTRL2 = 3V.

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