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LT3498

3498fa

PIN CONFIGURATION

ELECTRICAL CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

Input Voltage (VIN)....................................................12V

CTRL1 and CTRL2 Voltage........................................12V

FB2 Voltage..............................................................2.5V

VOUT2 Voltage ...........................................................32V

SW1 and SW2 Voltage ..............................................32V

CAP1 and CAP2 Voltage............................................32V

LED1 Voltage ............................................................32V

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

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

Storage Temperature Range...................–65°C to 150°C

(Notes 1, 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Minimum Operating Voltage

2.5

Maximum Operating Voltage

Supply Current (LED Off, OLED Off)

VIN = 3V, VCTRL1 = 0V, VCTRL2 = 0V

810

μA

Supply Current (LED On, OLED Off)

VIN = 3V, VCTRL1 = 3V, VCTRL2 = 0V, VCAP1 = 24V, VLED1

= 23V

1.6

Supply Current (LED Off, OLED On)

VIN = 3V, VCTRL1 = 0V, VCTRL2 = 3V, VFB2 = 3V

230

280

μA

Supply Current (LED On, OLED On)

VIN = 3V, VCTRL1 = 3V, VCTRL2 = 3V, VCAP1 = 24V, VLED1

= 23V

1.65

2.05

VCTRL1 for Full LED Current

VCTRL2 for Full OLED Brightness

●

1.5

VCTRL1 or VCTRL2 to Turn On IC

●

125

VCTRL1 and VCTRL2 to Shut Down IC

●

CTRL1, CTRL2 Pin Bias Current

100

LED Driver

LED Current Sense Voltage (VCAP – VLED)VCAP1 = 24V, ISW = 200mA

●

190

200

210

CAP1, LED1 Pin Bias Current

VCAP1 = 16V, VLED1 = 16V

μA

TOP VIEW

DDB PACKAGE

12-LEAD (3mm × 2mm) PLASTIC DFN

LED1

CTRL1

GND1

GND2

CTRL2

FB2

CAP1

SW1

VIN

SW2

CAP2

VOUT2

TJMAX = 125°C, θJA = 160°C/W

EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB

The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C, VIN = 3V, VCTRL1 = VCTRL2 = 3V.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LT3498EDDB#PBF

LT3498EDDB#TRPBF

LCQF

12-Lead (3mm × 2mm) Plastic DFN

–40°C to 85°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/

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