LTC3524_15 Datasheet, PDF (2/16 Pages) Linear Technology – Adjustable TFT Bias Supply with WLED Driver

LTC3524
ABSOLUTE MAXIMUM RATINGS
(Referred to GND)
V_IN, SW1, V_OUT, 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
VN_IN, 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
PIN CONFIGURATION
TOP VIEW
24 23 22 21 20 19
ELCD 1
V_IN 2
FBVO 3
V_OUT 4
SW1 5
C2^– 6
18 LED2
17 CH^–
16 CH⁺
25
15 VH
14 FBH
13 FBN
7 8 9 10 11 12
UF PACKAGE
24-LEAD (4mm × 4mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA = 37°C/W
EXPOSED PAD (PIN 25) MUST BE SOLDERED TO PCB
AND CONNECTED TO GND
ORDER INFORMATION
LEAD FREE FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3524EUF#PBF
LTC3524EUF#TRPBF
3524
24-Lead (4mm × 4mm) Plastic QFN
LEAD BASED FINISH
TAPE AND REEL
PART MARKING
PACKAGE DESCRIPTION
LTC3524EUF
LTC3524EUF#TR
3524
24-Lead (4mm × 4mm) Plastic QFN
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/
TEMPERATURE RANGE
–40°C to 85°C
TEMPERATURE RANGE
–40°C to 85°C
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are T_A = 25°C. V_IN = 3.6V, V_OUT = 5.1V, T_A = 25°C, unless otherwise noted.
PARAMETER
Input Voltage Range
V_IN Quiescent Supply Current LCD
V_IN Quiescent Supply Current LED
V_OUT Quiescent Supply Current LCD
V_IN Quiescent Current Shutdown
Switching Frequency
Maximum Duty Cycle
V_OUT Boost Regulator
FBVO Regulation Voltage
V_OUT Adjust Range
CONDITIONS
MIN TYP MAX UNITS
● 2.5
6.0
V
ELCD = 1.5V, ELED1,2 = GND
200
μA
ELCD = GND, ELED1,2 = 1.5V (LED1 and LED2 Open)
4
mA
ELCD = 1.5V, ELED1,2 = GND
250
μA
ELCD = ELED1,2 = GND
.02
2
μA
LED and LCD Boosts
1
1.5
2
MHz
LED and LCD Boosts
85
94
%
See Note 3
● 1.20 1.225 1.25
V
3.0
6.0
V
3524f
2