LTC3524 datasheet(2/16 Pages) LINER

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LTC3524

3524f

PIN CONFIGURATION

ELECTRICAL CHARACTERISTICS

ABSOLUTE MAXIMUM RATINGS

VIN, SW1, VOUT, C2–....................................... –0.3 to 7V

ELCD, ELED1, ELED2, PROG ......................... –0.3 to 7V

FBN, FBH, FBVO ............................................. –0.3 to 7V

V2x, C2+, CH– .............................................. –0.3 to 13V

LED1, LED2, VLED, SW2 ............................. –0.3 to 22V

VNIN, VH, CH+, CN+...................................... –0.3 to 21V

VN.............................................................. –21 to +0.3V

Operating Temperature Range (Note 2) ...–40°C to 85°C

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

(Referred to GND)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Input Voltage Range

●

2.5

6.0

VIN Quiescent Supply Current LCD

ELCD = 1.5V, ELED1,2 = GND

200

μA

VIN Quiescent Supply Current LED

ELCD = GND, ELED1,2 = 1.5V (LED1 and LED2 Open)

4mA

VOUT Quiescent Supply Current LCD

ELCD = 1.5V, ELED1,2 = GND

250

μA

VIN Quiescent Current Shutdown

ELCD = ELED1,2 = GND

.02

μA

Switching Frequency

LED and LCD Boosts

1.5

MHz

Maximum Duty Cycle

LED and LCD Boosts

VOUT Boost Regulator

FBVO Regulation Voltage

●

1.20

1.225

1.25

VOUT Adjust Range

See Note 3

3.0

6.0

24 23 22

21 20 19

TOP VIEW

UF PACKAGE

24-LEAD (4mm

× 4mm) PLASTIC QFN

10 11 12

ELCD

VIN

FBVO

VOUT

SW1

C2–

LED2

CH–

CH+

FBH

FBN

TJMAX = 125°C, θJA = 37°C/W

EXPOSED PAD (PIN 25) MUST BE SOLDERED TO PCB

AND CONNECTED TO GND

The ● denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are TA = 25°C. VIN = 3.6V, VOUT = 5.1V, TA = 25°C, unless otherwise noted.

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3524EUF#PBF

LTC3524EUF#TRPBF

3524

24-Lead (4mm × 4mm) Plastic QFN

–40°C to 85°C

LEAD BASED FINISH

TAPE AND REEL

PART MARKING

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3524EUF

LTC3524EUF#TR

3524

24-Lead (4mm × 4mm) Plastic QFN

–40°C to 85°C

Consult LTC Marketing for parts speciﬁed with wider operating temperature ranges.

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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